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- Committer: Teddy Hogeborn
- Date: 2011-11-24 20:15:24 UTC
- mto: (505.2.8 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111124201524-5w9ovzpuw3drdlgf
* network-hooks.d: New directory.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
- files added:
- network-hooks.d
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
88
90
89
91
#ifdef __linux__
90
92
#include <sys/klog.h> /* klogctl() */
108
110
init_gnutls_session(),
109
111
GNUTLS_* */
110
112
#include <gnutls/openpgp.h>
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
113
115
114
116
/* GPGME */
115
117
#include <gpgme.h> /* All GPGME types, constants and
123
125
#define PATHDIR "/conf/conf.d/mandos"
124
126
#define SECKEY "seckey.txt"
125
127
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
126
129
127
130
bool debug = false;
128
131
static const char mandos_protocol_version[] = "1";
130
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
131
134
static const char sys_class_net[] = "/sys/class/net";
132
135
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
133
137
134
138
/* Doubly linked list that need to be circularly linked when used */
135
139
typedef struct server{
170
174
perror(print_text);
171
175
}
172
176
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
173
186
/*
174
187
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
188
* bytes. "buffer_capacity" is how much is currently allocated,
176
189
* "buffer_length" is how much is already used.
177
190
*/
178
191
size_t incbuffer(char **buffer, size_t buffer_length,
179
size_t buffer_capacity){
192
size_t buffer_capacity){
180
193
if(buffer_length + BUFFER_SIZE > buffer_capacity){
181
194
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
182
195
if(buffer == NULL){
188
201
}
189
202
190
203
/* Add server to set of servers to retry periodically */
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
193
int af){
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
194
206
int ret;
195
207
server *new_server = malloc(sizeof(server));
196
208
if(new_server == NULL){
198
210
return -1;
199
211
}
200
212
*new_server = (server){ .ip = strdup(ip),
201
.port = port,
202
.if_index = if_index,
203
.af = af };
213
.port = port,
214
.if_index = if_index,
215
.af = af };
204
216
if(new_server->ip == NULL){
205
217
perror_plus("strdup");
206
218
return -1;
228
240
/*
229
241
* Initialize GPGME.
230
242
*/
231
static bool init_gpgme(const char *seckey,
232
const char *pubkey, const char *tempdir){
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
233
245
gpgme_error_t rc;
234
246
gpgme_engine_info_t engine_info;
235
247
250
262
251
263
rc = gpgme_data_new_from_fd(&pgp_data, fd);
252
264
if(rc != GPG_ERR_NO_ERROR){
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
254
gpgme_strsource(rc), gpgme_strerror(rc));
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
255
267
return false;
256
268
}
257
269
258
270
rc = gpgme_op_import(mc.ctx, pgp_data);
259
271
if(rc != GPG_ERR_NO_ERROR){
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
261
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
262
274
return false;
263
275
}
264
276
271
283
}
272
284
273
285
if(debug){
274
fprintf(stderr, "Initializing GPGME\n");
286
fprintf_plus(stderr, "Initializing GPGME\n");
275
287
}
276
288
277
289
/* Init GPGME */
278
290
gpgme_check_version(NULL);
279
291
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
280
292
if(rc != GPG_ERR_NO_ERROR){
281
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
282
gpgme_strsource(rc), gpgme_strerror(rc));
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
283
295
return false;
284
296
}
285
297
286
298
/* Set GPGME home directory for the OpenPGP engine only */
287
299
rc = gpgme_get_engine_info(&engine_info);
288
300
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
291
303
return false;
292
304
}
293
305
while(engine_info != NULL){
299
311
engine_info = engine_info->next;
300
312
}
301
313
if(engine_info == NULL){
302
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
303
316
return false;
304
317
}
305
318
306
319
/* Create new GPGME "context" */
307
320
rc = gpgme_new(&(mc.ctx));
308
321
if(rc != GPG_ERR_NO_ERROR){
309
fprintf(stderr, "bad gpgme_new: %s: %s\n",
310
gpgme_strsource(rc), gpgme_strerror(rc));
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
311
325
return false;
312
326
}
313
327
332
346
ssize_t plaintext_length = 0;
333
347
334
348
if(debug){
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
336
350
}
337
351
338
352
/* Create new GPGME data buffer from memory cryptotext */
339
353
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
340
354
0);
341
355
if(rc != GPG_ERR_NO_ERROR){
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
343
gpgme_strsource(rc), gpgme_strerror(rc));
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
344
358
return -1;
345
359
}
346
360
347
361
/* Create new empty GPGME data buffer for the plaintext */
348
362
rc = gpgme_data_new(&dh_plain);
349
363
if(rc != GPG_ERR_NO_ERROR){
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
351
gpgme_strsource(rc), gpgme_strerror(rc));
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
352
367
gpgme_data_release(dh_crypto);
353
368
return -1;
354
369
}
357
372
data buffer */
358
373
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
359
374
if(rc != GPG_ERR_NO_ERROR){
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
362
377
plaintext_length = -1;
363
378
if(debug){
364
379
gpgme_decrypt_result_t result;
365
380
result = gpgme_op_decrypt_result(mc.ctx);
366
381
if(result == NULL){
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
368
383
} else {
369
fprintf(stderr, "Unsupported algorithm: %s\n",
370
result->unsupported_algorithm);
371
fprintf(stderr, "Wrong key usage: %u\n",
372
result->wrong_key_usage);
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
373
388
if(result->file_name != NULL){
374
fprintf(stderr, "File name: %s\n", result->file_name);
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
375
390
}
376
391
gpgme_recipient_t recipient;
377
392
recipient = result->recipients;
378
393
while(recipient != NULL){
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");
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");
385
401
recipient = recipient->next;
386
402
}
387
403
}
390
406
}
391
407
392
408
if(debug){
393
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
394
410
}
395
411
396
412
/* Seek back to the beginning of the GPGME plaintext data buffer */
403
419
*plaintext = NULL;
404
420
while(true){
405
421
plaintext_capacity = incbuffer(plaintext,
406
(size_t)plaintext_length,
407
plaintext_capacity);
422
(size_t)plaintext_length,
423
plaintext_capacity);
408
424
if(plaintext_capacity == 0){
409
perror_plus("incbuffer");
410
plaintext_length = -1;
411
goto decrypt_end;
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
412
428
}
413
429
414
430
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
427
443
}
428
444
429
445
if(debug){
430
fprintf(stderr, "Decrypted password is: ");
446
fprintf_plus(stderr, "Decrypted password is: ");
431
447
for(ssize_t i = 0; i < plaintext_length; i++){
432
448
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
433
449
}
455
471
/* GnuTLS log function callback */
456
472
static void debuggnutls(__attribute__((unused)) int level,
457
473
const char* string){
458
fprintf(stderr, "GnuTLS: %s", string);
474
fprintf_plus(stderr, "GnuTLS: %s", string);
459
475
}
460
476
461
477
static int init_gnutls_global(const char *pubkeyfilename,
463
479
int ret;
464
480
465
481
if(debug){
466
fprintf(stderr, "Initializing GnuTLS\n");
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
467
483
}
468
484
469
485
ret = gnutls_global_init();
470
486
if(ret != GNUTLS_E_SUCCESS){
471
fprintf(stderr, "GnuTLS global_init: %s\n",
472
safer_gnutls_strerror(ret));
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
473
489
return -1;
474
490
}
475
491
484
500
/* OpenPGP credentials */
485
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
486
502
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
489
505
gnutls_global_deinit();
490
506
return -1;
491
507
}
492
508
493
509
if(debug){
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
495
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
496
seckeyfilename);
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
497
514
}
498
515
499
516
ret = gnutls_certificate_set_openpgp_key_file
500
517
(mc.cred, pubkeyfilename, seckeyfilename,
501
518
GNUTLS_OPENPGP_FMT_BASE64);
502
519
if(ret != GNUTLS_E_SUCCESS){
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));
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));
508
525
goto globalfail;
509
526
}
510
527
511
528
/* GnuTLS server initialization */
512
529
ret = gnutls_dh_params_init(&mc.dh_params);
513
530
if(ret != GNUTLS_E_SUCCESS){
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
515
" %s\n", safer_gnutls_strerror(ret));
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
516
534
goto globalfail;
517
535
}
518
536
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
519
537
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
521
safer_gnutls_strerror(ret));
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
522
540
goto globalfail;
523
541
}
524
542
544
562
}
545
563
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
546
564
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
548
safer_gnutls_strerror(ret));
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
549
568
}
550
569
551
570
{
558
577
}
559
578
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
560
579
if(ret != GNUTLS_E_SUCCESS){
561
fprintf(stderr, "Syntax error at: %s\n", err);
562
fprintf(stderr, "GnuTLS error: %s\n",
563
safer_gnutls_strerror(ret));
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
564
583
gnutls_deinit(*session);
565
584
return -1;
566
585
}
575
594
}
576
595
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
577
596
if(ret != GNUTLS_E_SUCCESS){
578
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
579
safer_gnutls_strerror(ret));
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
580
599
gnutls_deinit(*session);
581
600
return -1;
582
601
}
627
646
pf = PF_INET;
628
647
break;
629
648
default:
630
fprintf(stderr, "Bad address family: %d\n", af);
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
631
650
errno = EINVAL;
632
651
return -1;
633
652
}
638
657
}
639
658
640
659
if(debug){
641
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
642
"\n", ip, port);
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
643
662
}
644
663
645
664
tcp_sd = socket(pf, SOCK_STREAM, 0);
671
690
}
672
691
if(ret == 0){
673
692
int e = errno;
674
fprintf(stderr, "Bad address: %s\n", ip);
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
675
694
errno = e;
676
695
goto mandos_end;
677
696
}
682
701
683
702
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
684
703
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
685
-Wunreachable-code*/
704
-Wunreachable-code*/
686
705
if(if_index == AVAHI_IF_UNSPEC){
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
688
" without a network interface\n");
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
689
708
errno = EINVAL;
690
709
goto mandos_end;
691
710
}
709
728
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
729
perror_plus("if_indextoname");
711
730
} else {
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
ip, interface, port);
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
714
733
}
715
734
} else {
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
717
port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
718
737
}
719
738
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
720
739
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
730
749
perror_plus("inet_ntop");
731
750
} else {
732
751
if(strcmp(addrstr, ip) != 0){
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
734
753
}
735
754
}
736
755
}
764
783
while(true){
765
784
size_t out_size = strlen(out);
766
785
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
767
out_size - written));
786
out_size - written));
768
787
if(ret == -1){
769
788
int e = errno;
770
789
perror_plus("write");
790
809
}
791
810
792
811
if(debug){
793
fprintf(stderr, "Establishing TLS session with %s\n", ip);
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
794
813
}
795
814
796
815
if(quit_now){
816
835
817
836
if(ret != GNUTLS_E_SUCCESS){
818
837
if(debug){
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
820
839
gnutls_perror(ret);
821
840
}
822
841
errno = EPROTO;
826
845
/* Read OpenPGP packet that contains the wanted password */
827
846
828
847
if(debug){
829
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
830
ip);
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
831
850
}
832
851
833
852
while(true){
838
857
}
839
858
840
859
buffer_capacity = incbuffer(&buffer, buffer_length,
841
buffer_capacity);
860
buffer_capacity);
842
861
if(buffer_capacity == 0){
843
862
int e = errno;
844
863
perror_plus("incbuffer");
871
890
}
872
891
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
873
892
if(ret < 0){
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
875
895
gnutls_perror(ret);
876
896
errno = EPROTO;
877
897
goto mandos_end;
878
898
}
879
899
break;
880
900
default:
881
fprintf(stderr, "Unknown error while reading data from"
882
" encrypted session with Mandos server\n");
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
883
903
gnutls_bye(session, GNUTLS_SHUT_RDWR);
884
904
errno = EIO;
885
905
goto mandos_end;
890
910
}
891
911
892
912
if(debug){
893
fprintf(stderr, "Closing TLS session\n");
913
fprintf_plus(stderr, "Closing TLS session\n");
894
914
}
895
915
896
916
if(quit_now){
908
928
909
929
if(buffer_length > 0){
910
930
ssize_t decrypted_buffer_size;
911
decrypted_buffer_size = pgp_packet_decrypt(buffer,
912
buffer_length,
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
913
932
&decrypted_buffer);
914
933
if(decrypted_buffer_size >= 0){
915
934
926
945
if(ret == 0 and ferror(stdout)){
927
946
int e = errno;
928
947
if(debug){
929
fprintf(stderr, "Error writing encrypted data: %s\n",
930
strerror(errno));
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
931
950
}
932
951
errno = e;
933
952
goto mandos_end;
990
1009
switch(event){
991
1010
default:
992
1011
case AVAHI_RESOLVER_FAILURE:
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)));
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)));
996
1016
break;
997
1017
998
1018
case AVAHI_RESOLVER_FOUND:
1000
1020
char ip[AVAHI_ADDRESS_STR_MAX];
1001
1021
avahi_address_snprint(ip, sizeof(ip), address);
1002
1022
if(debug){
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);
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);
1006
1026
}
1007
1027
int ret = start_mandos_communication(ip, port, interface,
1008
1028
avahi_proto_to_af(proto));
1040
1060
default:
1041
1061
case AVAHI_BROWSER_FAILURE:
1042
1062
1043
fprintf(stderr, "(Avahi browser) %s\n",
1044
avahi_strerror(avahi_server_errno(mc.server)));
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
1045
1065
avahi_simple_poll_quit(mc.simple_poll);
1046
1066
return;
1047
1067
1054
1074
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1055
1075
name, type, domain, protocol, 0,
1056
1076
resolve_callback, NULL) == NULL)
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1058
name, avahi_strerror(avahi_server_errno(mc.server)));
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
1059
1080
break;
1060
1081
1061
1082
case AVAHI_BROWSER_REMOVE:
1064
1085
case AVAHI_BROWSER_ALL_FOR_NOW:
1065
1086
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1066
1087
if(debug){
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1068
1090
}
1069
1091
break;
1070
1092
}
1085
1107
errno = old_errno;
1086
1108
}
1087
1109
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){
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){
1144
1121
if(debug){
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1122
perror_plus("ioctl SIOCGIFFLAGS");
1147
1123
}
1148
free(flagstring);
1149
return 0;
1124
return false;
1150
1125
}
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1126
return true;
1127
}
1128
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1130
1153
1131
/* Reject the loopback device */
1154
if(flags & IFF_LOOPBACK){
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1155
1133
if(debug){
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1158
1136
}
1159
return 0;
1137
return false;
1160
1138
}
1161
1139
/* Accept point-to-point devices only if connect_to is specified */
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1163
1141
if(debug){
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1166
1144
}
1167
return 1;
1145
return true;
1168
1146
}
1169
1147
/* Otherwise, reject non-broadcast-capable devices */
1170
if(not (flags & IFF_BROADCAST)){
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1171
1149
if(debug){
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1174
1152
}
1175
return 0;
1153
return false;
1176
1154
}
1177
1155
/* Reject non-ARP interfaces (including dummy interfaces) */
1178
if(flags & IFF_NOARP){
1156
if(ifr->ifr_flags & IFF_NOARP){
1179
1157
if(debug){
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1182
1160
}
1183
return 0;
1161
return false;
1184
1162
}
1163
1185
1164
/* Accept this device */
1186
1165
if(debug){
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
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;
1189
1235
}
1190
1236
return 1;
1191
1237
}
1201
1247
return 1;
1202
1248
}
1203
1249
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
return 1;
1305
}
1306
1204
1307
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
1308
int ret;
1206
1309
struct timespec now;
1210
1313
while(true){
1211
1314
if(mc.current_server == NULL){
1212
1315
if (debug){
1213
fprintf(stderr,
1214
"Wait until first server is found. No timeout!\n");
1316
fprintf_plus(stderr, "Wait until first server is found."
1317
" No timeout!\n");
1215
1318
}
1216
1319
ret = avahi_simple_poll_iterate(s, -1);
1217
1320
} else {
1218
1321
if (debug){
1219
fprintf(stderr, "Check current_server if we should run it,"
1220
" or wait\n");
1322
fprintf_plus(stderr, "Check current_server if we should run"
1323
" it, or wait\n");
1221
1324
}
1222
1325
/* the current time */
1223
1326
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1239
1342
- ((intmax_t)waited_time.tv_nsec / 1000000));
1240
1343
1241
1344
if (debug){
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1345
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1346
block_time);
1243
1347
}
1244
1348
1245
1349
if(block_time <= 0){
1265
1369
ret = avahi_simple_poll_iterate(s, (int)block_time);
1266
1370
}
1267
1371
if(ret != 0){
1268
if (ret > 0 or errno != EINTR) {
1372
if (ret > 0 or errno != EINTR){
1269
1373
return (ret != 1) ? ret : 0;
1270
1374
}
1271
1375
}
1272
1376
}
1273
1377
}
1274
1378
1379
bool run_network_hooks(const char *mode, const char *interface,
1380
const float delay){
1381
struct dirent **direntries;
1382
struct dirent *direntry;
1383
int ret;
1384
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1385
alphasort);
1386
if(numhooks == -1){
1387
perror_plus("scandir");
1388
} else {
1389
int devnull = open("/dev/null", O_RDONLY);
1390
for(int i = 0; i < numhooks; i++){
1391
direntry = direntries[0];
1392
char *fullname = NULL;
1393
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1394
if(ret < 0){
1395
perror_plus("asprintf");
1396
continue;
1397
}
1398
pid_t hook_pid = fork();
1399
if(hook_pid == 0){
1400
/* Child */
1401
dup2(devnull, STDIN_FILENO);
1402
close(devnull);
1403
dup2(STDERR_FILENO, STDOUT_FILENO);
1404
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1405
if(ret == -1){
1406
perror_plus("setenv");
1407
return false;
1408
}
1409
ret = setenv("DEVICE", interface, 1);
1410
if(ret == -1){
1411
perror_plus("setenv");
1412
return false;
1413
}
1414
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1415
if(ret == -1){
1416
perror_plus("setenv");
1417
return false;
1418
}
1419
ret = setenv("MODE", mode, 1);
1420
if(ret == -1){
1421
perror_plus("setenv");
1422
return false;
1423
}
1424
char *delaystring;
1425
ret = asprintf(&delaystring, "%f", delay);
1426
if(ret == -1){
1427
perror_plus("asprintf");
1428
return false;
1429
}
1430
ret = setenv("DELAY", delaystring, 1);
1431
if(ret == -1){
1432
free(delaystring);
1433
perror_plus("setenv");
1434
return false;
1435
}
1436
free(delaystring);
1437
ret = execl(fullname, direntry->d_name, mode, NULL);
1438
perror_plus("execl");
1439
} else {
1440
int status;
1441
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1442
perror_plus("waitpid");
1443
free(fullname);
1444
continue;
1445
}
1446
if(WIFEXITED(status)){
1447
if(WEXITSTATUS(status) != 0){
1448
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1449
" with status %d\n", direntry->d_name,
1450
WEXITSTATUS(status));
1451
free(fullname);
1452
continue;
1453
}
1454
} else if(WIFSIGNALED(status)){
1455
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1456
" signal %d\n", direntry->d_name,
1457
WTERMSIG(status));
1458
free(fullname);
1459
continue;
1460
} else {
1461
fprintf_plus(stderr, "Warning: network hook \"%s\""
1462
" crashed\n", direntry->d_name);
1463
free(fullname);
1464
continue;
1465
}
1466
}
1467
free(fullname);
1468
if(quit_now){
1469
break;
1470
}
1471
}
1472
close(devnull);
1473
}
1474
return true;
1475
}
1476
1275
1477
int main(int argc, char *argv[]){
1276
1478
AvahiSServiceBrowser *sb = NULL;
1277
1479
int error;
1359
1561
.arg = "SECONDS",
1360
1562
.doc = "Retry interval used when denied by the mandos server",
1361
1563
.group = 2 },
1564
{ .name = "network-hook-dir", .key = 133,
1565
.arg = "DIR",
1566
.doc = "Directory where network hooks are located",
1567
.group = 2 },
1362
1568
/*
1363
1569
* These reproduce what we would get without ARGP_NO_HELP
1364
1570
*/
1417
1623
argp_error(state, "Bad retry interval");
1418
1624
}
1419
1625
break;
1626
case 133: /* --network-hook-dir */
1627
hookdir = arg;
1628
break;
1420
1629
/*
1421
1630
* These reproduce what we would get without ARGP_NO_HELP
1422
1631
*/
1428
1637
argp_state_help(state, state->out_stream,
1429
1638
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1430
1639
case 'V': /* --version */
1431
fprintf(state->out_stream, "%s\n", argp_program_version);
1640
fprintf_plus(state->out_stream,
1641
"Mandos plugin mandos-client: ");
1642
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1432
1643
exit(argp_err_exit_status);
1433
1644
break;
1434
1645
default:
1479
1690
if(ret == -1){
1480
1691
perror_plus("fstat");
1481
1692
} else {
1482
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1693
if(S_ISREG(st.st_mode)
1694
and st.st_uid == 0 and st.st_gid == 0){
1483
1695
ret = fchown(seckey_fd, uid, gid);
1484
1696
if(ret == -1){
1485
1697
perror_plus("fchown");
1499
1711
if(ret == -1){
1500
1712
perror_plus("fstat");
1501
1713
} else {
1502
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1714
if(S_ISREG(st.st_mode)
1715
and st.st_uid == 0 and st.st_gid == 0){
1503
1716
ret = fchown(pubkey_fd, uid, gid);
1504
1717
if(ret == -1){
1505
1718
perror_plus("fchown");
1518
1731
}
1519
1732
}
1520
1733
1734
/* Run network hooks */
1735
{
1736
/* Re-raise priviliges */
1737
errno = 0;
1738
ret = seteuid(0);
1739
if(ret == -1){
1740
perror_plus("seteuid");
1741
}
1742
if(not run_network_hooks("start", interface, delay)){
1743
goto end;
1744
}
1745
/* Lower privileges */
1746
errno = 0;
1747
ret = seteuid(uid);
1748
if(ret == -1){
1749
perror_plus("seteuid");
1750
}
1751
}
1752
1521
1753
if(not debug){
1522
1754
avahi_set_log_function(empty_log);
1523
1755
}
1524
1756
1525
1757
if(interface[0] == '\0'){
1526
1758
struct dirent **direntries;
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1759
/* First look for interfaces that are up */
1760
ret = scandir(sys_class_net, &direntries, up_interface,
1528
1761
alphasort);
1762
if(ret == 0){
1763
/* No up interfaces, look for any good interfaces */
1764
free(direntries);
1765
ret = scandir(sys_class_net, &direntries, good_interface,
1766
alphasort);
1767
}
1529
1768
if(ret >= 1){
1530
/* Pick the first good interface */
1769
/* Pick the first interface returned */
1531
1770
interface = strdup(direntries[0]->d_name);
1532
1771
if(debug){
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1772
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1534
1773
}
1535
1774
if(interface == NULL){
1536
1775
perror_plus("malloc");
1541
1780
free(direntries);
1542
1781
} else {
1543
1782
free(direntries);
1544
fprintf(stderr, "Could not find a network interface\n");
1783
fprintf_plus(stderr, "Could not find a network interface\n");
1545
1784
exitcode = EXIT_FAILURE;
1546
1785
goto end;
1547
1786
}
1553
1792
srand((unsigned int) time(NULL));
1554
1793
mc.simple_poll = avahi_simple_poll_new();
1555
1794
if(mc.simple_poll == NULL){
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1795
fprintf_plus(stderr,
1796
"Avahi: Failed to create simple poll object.\n");
1557
1797
exitcode = EX_UNAVAILABLE;
1558
1798
goto end;
1559
1799
}
1625
1865
if(strcmp(interface, "none") != 0){
1626
1866
if_index = (AvahiIfIndex) if_nametoindex(interface);
1627
1867
if(if_index == 0){
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1868
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1629
1869
exitcode = EX_UNAVAILABLE;
1630
1870
goto end;
1631
1871
}
1751
1991
#endif /* __linux__ */
1752
1992
/* Lower privileges */
1753
1993
errno = 0;
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
}
1994
/* Lower privileges */
1995
ret = seteuid(uid);
1996
if(ret == -1){
1997
perror_plus("seteuid");
1766
1998
}
1767
1999
}
1768
2000
1772
2004
1773
2005
ret = init_gnutls_global(pubkey, seckey);
1774
2006
if(ret == -1){
1775
fprintf(stderr, "init_gnutls_global failed\n");
2007
fprintf_plus(stderr, "init_gnutls_global failed\n");
1776
2008
exitcode = EX_UNAVAILABLE;
1777
2009
goto end;
1778
2010
} else {
1794
2026
}
1795
2027
1796
2028
if(not init_gpgme(pubkey, seckey, tempdir)){
1797
fprintf(stderr, "init_gpgme failed\n");
2029
fprintf_plus(stderr, "init_gpgme failed\n");
1798
2030
exitcode = EX_UNAVAILABLE;
1799
2031
goto end;
1800
2032
} else {
1810
2042
/* (Mainly meant for debugging) */
1811
2043
char *address = strrchr(connect_to, ':');
1812
2044
if(address == NULL){
1813
fprintf(stderr, "No colon in address\n");
2045
fprintf_plus(stderr, "No colon in address\n");
1814
2046
exitcode = EX_USAGE;
1815
2047
goto end;
1816
2048
}
1824
2056
tmpmax = strtoimax(address+1, &tmp, 10);
1825
2057
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1826
2058
or tmpmax != (uint16_t)tmpmax){
1827
fprintf(stderr, "Bad port number\n");
2059
fprintf_plus(stderr, "Bad port number\n");
1828
2060
exitcode = EX_USAGE;
1829
2061
goto end;
1830
2062
}
1860
2092
break;
1861
2093
}
1862
2094
if(debug){
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
2095
fprintf_plus(stderr, "Retrying in %d seconds\n",
2096
(int)retry_interval);
1865
2097
}
1866
2098
sleep((int)retry_interval);
1867
2099
}
1869
2101
if (not quit_now){
1870
2102
exitcode = EXIT_SUCCESS;
1871
2103
}
1872
2104
1873
2105
goto end;
1874
2106
}
1875
2107
1897
2129
1898
2130
/* Check if creating the Avahi server object succeeded */
1899
2131
if(mc.server == NULL){
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
1901
avahi_strerror(error));
2132
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2133
avahi_strerror(error));
1902
2134
exitcode = EX_UNAVAILABLE;
1903
2135
goto end;
1904
2136
}
1912
2144
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1913
2145
NULL, 0, browse_callback, NULL);
1914
2146
if(sb == NULL){
1915
fprintf(stderr, "Failed to create service browser: %s\n",
1916
avahi_strerror(avahi_server_errno(mc.server)));
2147
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2148
avahi_strerror(avahi_server_errno(mc.server)));
1917
2149
exitcode = EX_UNAVAILABLE;
1918
2150
goto end;
1919
2151
}
1925
2157
/* Run the main loop */
1926
2158
1927
2159
if(debug){
1928
fprintf(stderr, "Starting Avahi loop search\n");
2160
fprintf_plus(stderr, "Starting Avahi loop search\n");
1929
2161
}
1930
2162
1931
2163
ret = avahi_loop_with_timeout(mc.simple_poll,
1932
2164
(int)(retry_interval * 1000));
1933
2165
if(debug){
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1935
(ret == 0) ? "successfully" : "with error");
2166
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2167
(ret == 0) ? "successfully" : "with error");
1936
2168
}
1937
2169
1938
2170
end:
1939
2171
1940
2172
if(debug){
1941
fprintf(stderr, "%s exiting\n", argv[0]);
2173
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1942
2174
}
1943
2175
1944
2176
/* Cleanup things */
1972
2204
}
1973
2205
}
1974
2206
1975
/* Take down the network interface */
1976
if(take_down_interface){
1977
/* Re-raise priviliges */
2207
/* Re-raise priviliges */
2208
{
1978
2209
errno = 0;
1979
2210
ret = seteuid(0);
1980
2211
if(ret == -1){
1981
2212
perror_plus("seteuid");
1982
2213
}
1983
if(geteuid() == 0){
2214
/* Run network hooks */
2215
if(not run_network_hooks("stop", interface, delay)){
2216
goto end;
2217
}
2218
2219
/* Take down the network interface */
2220
if(take_down_interface and geteuid() == 0){
1984
2221
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1985
2222
if(ret == -1){
1986
2223
perror_plus("ioctl SIOCGIFFLAGS");
1987
} else if(network.ifr_flags & IFF_UP) {
2224
} else if(network.ifr_flags & IFF_UP){
1988
2225
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1989
2226
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1990
2227
if(ret == -1){
1995
2232
if(ret == -1){
1996
2233
perror_plus("close");
1997
2234
}
1998
/* Lower privileges permanently */
1999
errno = 0;
2000
ret = setuid(uid);
2001
if(ret == -1){
2002
perror_plus("setuid");
2003
}
2004
2235
}
2005
2236
}
2237
/* Lower privileges permanently */
2238
errno = 0;
2239
ret = setuid(uid);
2240
if(ret == -1){
2241
perror_plus("setuid");
2242
}
2006
2243
2007
2244
/* Removes the GPGME temp directory and all files inside */
2008
2245
if(tempdir_created){
2022
2259
}
2023
2260
ret = remove(fullname);
2024
2261
if(ret == -1){
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2026
strerror(errno));
2262
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2263
strerror(errno));
2027
2264
}
2028
2265
free(fullname);
2029
2266
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0