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- Committer: Teddy Hogeborn
- Date: 2011-11-24 20:15:24 UTC
- mto: (505.2.8 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111124201524-5w9ovzpuw3drdlgf
* network-hooks.d: New directory.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
- files added:
- network-hooks.d
- files modified:
- TODO
added
removed
plugins.d/mandos-client.c
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
88
90
89
91
#ifdef __linux__
90
92
#include <sys/klog.h> /* klogctl() */
108
110
init_gnutls_session(),
109
111
GNUTLS_* */
110
112
#include <gnutls/openpgp.h>
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
113
115
114
116
/* GPGME */
115
117
#include <gpgme.h> /* All GPGME types, constants and
131
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
132
134
static const char sys_class_net[] = "/sys/class/net";
133
135
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
134
137
135
138
/* Doubly linked list that need to be circularly linked when used */
136
139
typedef struct server{
171
174
perror(print_text);
172
175
}
173
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
174
186
/*
175
187
* Make additional room in "buffer" for at least BUFFER_SIZE more
176
188
* bytes. "buffer_capacity" is how much is currently allocated,
177
189
* "buffer_length" is how much is already used.
178
190
*/
179
191
size_t incbuffer(char **buffer, size_t buffer_length,
180
size_t buffer_capacity){
192
size_t buffer_capacity){
181
193
if(buffer_length + BUFFER_SIZE > buffer_capacity){
182
194
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
195
if(buffer == NULL){
189
201
}
190
202
191
203
/* Add server to set of servers to retry periodically */
192
int add_server(const char *ip, uint16_t port,
193
AvahiIfIndex if_index,
194
int af){
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
195
206
int ret;
196
207
server *new_server = malloc(sizeof(server));
197
208
if(new_server == NULL){
199
210
return -1;
200
211
}
201
212
*new_server = (server){ .ip = strdup(ip),
202
.port = port,
203
.if_index = if_index,
204
.af = af };
213
.port = port,
214
.if_index = if_index,
215
.af = af };
205
216
if(new_server->ip == NULL){
206
217
perror_plus("strdup");
207
218
return -1;
229
240
/*
230
241
* Initialize GPGME.
231
242
*/
232
static bool init_gpgme(const char *seckey,
233
const char *pubkey, const char *tempdir){
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
234
245
gpgme_error_t rc;
235
246
gpgme_engine_info_t engine_info;
236
247
251
262
252
263
rc = gpgme_data_new_from_fd(&pgp_data, fd);
253
264
if(rc != GPG_ERR_NO_ERROR){
254
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
255
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));
256
267
return false;
257
268
}
258
269
259
270
rc = gpgme_op_import(mc.ctx, pgp_data);
260
271
if(rc != GPG_ERR_NO_ERROR){
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
263
274
return false;
264
275
}
265
276
272
283
}
273
284
274
285
if(debug){
275
fprintf(stderr, "Initializing GPGME\n");
286
fprintf_plus(stderr, "Initializing GPGME\n");
276
287
}
277
288
278
289
/* Init GPGME */
279
290
gpgme_check_version(NULL);
280
291
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
281
292
if(rc != GPG_ERR_NO_ERROR){
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
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));
284
295
return false;
285
296
}
286
297
287
298
/* Set GPGME home directory for the OpenPGP engine only */
288
299
rc = gpgme_get_engine_info(&engine_info);
289
300
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
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));
292
303
return false;
293
304
}
294
305
while(engine_info != NULL){
300
311
engine_info = engine_info->next;
301
312
}
302
313
if(engine_info == NULL){
303
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);
304
316
return false;
305
317
}
306
318
307
319
/* Create new GPGME "context" */
308
320
rc = gpgme_new(&(mc.ctx));
309
321
if(rc != GPG_ERR_NO_ERROR){
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
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));
312
325
return false;
313
326
}
314
327
333
346
ssize_t plaintext_length = 0;
334
347
335
348
if(debug){
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
337
350
}
338
351
339
352
/* Create new GPGME data buffer from memory cryptotext */
340
353
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
341
354
0);
342
355
if(rc != GPG_ERR_NO_ERROR){
343
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
344
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));
345
358
return -1;
346
359
}
347
360
348
361
/* Create new empty GPGME data buffer for the plaintext */
349
362
rc = gpgme_data_new(&dh_plain);
350
363
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
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));
353
367
gpgme_data_release(dh_crypto);
354
368
return -1;
355
369
}
358
372
data buffer */
359
373
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
360
374
if(rc != GPG_ERR_NO_ERROR){
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
363
377
plaintext_length = -1;
364
378
if(debug){
365
379
gpgme_decrypt_result_t result;
366
380
result = gpgme_op_decrypt_result(mc.ctx);
367
381
if(result == NULL){
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
369
383
} else {
370
fprintf(stderr, "Unsupported algorithm: %s\n",
371
result->unsupported_algorithm);
372
fprintf(stderr, "Wrong key usage: %u\n",
373
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);
374
388
if(result->file_name != NULL){
375
fprintf(stderr, "File name: %s\n", result->file_name);
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
376
390
}
377
391
gpgme_recipient_t recipient;
378
392
recipient = result->recipients;
379
393
while(recipient != NULL){
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");
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");
386
401
recipient = recipient->next;
387
402
}
388
403
}
391
406
}
392
407
393
408
if(debug){
394
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
395
410
}
396
411
397
412
/* Seek back to the beginning of the GPGME plaintext data buffer */
404
419
*plaintext = NULL;
405
420
while(true){
406
421
plaintext_capacity = incbuffer(plaintext,
407
(size_t)plaintext_length,
408
plaintext_capacity);
422
(size_t)plaintext_length,
423
plaintext_capacity);
409
424
if(plaintext_capacity == 0){
410
perror_plus("incbuffer");
411
plaintext_length = -1;
412
goto decrypt_end;
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
413
428
}
414
429
415
430
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
428
443
}
429
444
430
445
if(debug){
431
fprintf(stderr, "Decrypted password is: ");
446
fprintf_plus(stderr, "Decrypted password is: ");
432
447
for(ssize_t i = 0; i < plaintext_length; i++){
433
448
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
434
449
}
456
471
/* GnuTLS log function callback */
457
472
static void debuggnutls(__attribute__((unused)) int level,
458
473
const char* string){
459
fprintf(stderr, "GnuTLS: %s", string);
474
fprintf_plus(stderr, "GnuTLS: %s", string);
460
475
}
461
476
462
477
static int init_gnutls_global(const char *pubkeyfilename,
464
479
int ret;
465
480
466
481
if(debug){
467
fprintf(stderr, "Initializing GnuTLS\n");
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
468
483
}
469
484
470
485
ret = gnutls_global_init();
471
486
if(ret != GNUTLS_E_SUCCESS){
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
474
489
return -1;
475
490
}
476
491
485
500
/* OpenPGP credentials */
486
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
487
502
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
490
505
gnutls_global_deinit();
491
506
return -1;
492
507
}
493
508
494
509
if(debug){
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
497
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);
498
514
}
499
515
500
516
ret = gnutls_certificate_set_openpgp_key_file
501
517
(mc.cred, pubkeyfilename, seckeyfilename,
502
518
GNUTLS_OPENPGP_FMT_BASE64);
503
519
if(ret != GNUTLS_E_SUCCESS){
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));
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));
509
525
goto globalfail;
510
526
}
511
527
512
528
/* GnuTLS server initialization */
513
529
ret = gnutls_dh_params_init(&mc.dh_params);
514
530
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
517
534
goto globalfail;
518
535
}
519
536
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
537
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
523
540
goto globalfail;
524
541
}
525
542
545
562
}
546
563
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
547
564
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
549
safer_gnutls_strerror(ret));
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
550
568
}
551
569
552
570
{
559
577
}
560
578
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
561
579
if(ret != GNUTLS_E_SUCCESS){
562
fprintf(stderr, "Syntax error at: %s\n", err);
563
fprintf(stderr, "GnuTLS error: %s\n",
564
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));
565
583
gnutls_deinit(*session);
566
584
return -1;
567
585
}
576
594
}
577
595
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
578
596
if(ret != GNUTLS_E_SUCCESS){
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
581
599
gnutls_deinit(*session);
582
600
return -1;
583
601
}
628
646
pf = PF_INET;
629
647
break;
630
648
default:
631
fprintf(stderr, "Bad address family: %d\n", af);
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
632
650
errno = EINVAL;
633
651
return -1;
634
652
}
639
657
}
640
658
641
659
if(debug){
642
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
643
"\n", ip, port);
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
644
662
}
645
663
646
664
tcp_sd = socket(pf, SOCK_STREAM, 0);
672
690
}
673
691
if(ret == 0){
674
692
int e = errno;
675
fprintf(stderr, "Bad address: %s\n", ip);
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
676
694
errno = e;
677
695
goto mandos_end;
678
696
}
683
701
684
702
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
685
703
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
686
-Wunreachable-code*/
704
-Wunreachable-code*/
687
705
if(if_index == AVAHI_IF_UNSPEC){
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
690
708
errno = EINVAL;
691
709
goto mandos_end;
692
710
}
710
728
if(if_indextoname((unsigned int)if_index, interface) == NULL){
711
729
perror_plus("if_indextoname");
712
730
} else {
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
715
733
}
716
734
} else {
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
718
port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
719
737
}
720
738
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
721
739
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
731
749
perror_plus("inet_ntop");
732
750
} else {
733
751
if(strcmp(addrstr, ip) != 0){
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
735
753
}
736
754
}
737
755
}
765
783
while(true){
766
784
size_t out_size = strlen(out);
767
785
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
768
out_size - written));
786
out_size - written));
769
787
if(ret == -1){
770
788
int e = errno;
771
789
perror_plus("write");
791
809
}
792
810
793
811
if(debug){
794
fprintf(stderr, "Establishing TLS session with %s\n", ip);
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
795
813
}
796
814
797
815
if(quit_now){
817
835
818
836
if(ret != GNUTLS_E_SUCCESS){
819
837
if(debug){
820
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
821
839
gnutls_perror(ret);
822
840
}
823
841
errno = EPROTO;
827
845
/* Read OpenPGP packet that contains the wanted password */
828
846
829
847
if(debug){
830
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
831
ip);
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
832
850
}
833
851
834
852
while(true){
839
857
}
840
858
841
859
buffer_capacity = incbuffer(&buffer, buffer_length,
842
buffer_capacity);
860
buffer_capacity);
843
861
if(buffer_capacity == 0){
844
862
int e = errno;
845
863
perror_plus("incbuffer");
872
890
}
873
891
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
874
892
if(ret < 0){
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
876
895
gnutls_perror(ret);
877
896
errno = EPROTO;
878
897
goto mandos_end;
879
898
}
880
899
break;
881
900
default:
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
884
903
gnutls_bye(session, GNUTLS_SHUT_RDWR);
885
904
errno = EIO;
886
905
goto mandos_end;
891
910
}
892
911
893
912
if(debug){
894
fprintf(stderr, "Closing TLS session\n");
913
fprintf_plus(stderr, "Closing TLS session\n");
895
914
}
896
915
897
916
if(quit_now){
909
928
910
929
if(buffer_length > 0){
911
930
ssize_t decrypted_buffer_size;
912
decrypted_buffer_size = pgp_packet_decrypt(buffer,
913
buffer_length,
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
914
932
&decrypted_buffer);
915
933
if(decrypted_buffer_size >= 0){
916
934
927
945
if(ret == 0 and ferror(stdout)){
928
946
int e = errno;
929
947
if(debug){
930
fprintf(stderr, "Error writing encrypted data: %s\n",
931
strerror(errno));
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
932
950
}
933
951
errno = e;
934
952
goto mandos_end;
991
1009
switch(event){
992
1010
default:
993
1011
case AVAHI_RESOLVER_FAILURE:
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)));
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)));
997
1016
break;
998
1017
999
1018
case AVAHI_RESOLVER_FOUND:
1001
1020
char ip[AVAHI_ADDRESS_STR_MAX];
1002
1021
avahi_address_snprint(ip, sizeof(ip), address);
1003
1022
if(debug){
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);
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);
1007
1026
}
1008
1027
int ret = start_mandos_communication(ip, port, interface,
1009
1028
avahi_proto_to_af(proto));
1041
1060
default:
1042
1061
case AVAHI_BROWSER_FAILURE:
1043
1062
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
1046
1065
avahi_simple_poll_quit(mc.simple_poll);
1047
1066
return;
1048
1067
1055
1074
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
1075
name, type, domain, protocol, 0,
1057
1076
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
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)));
1060
1080
break;
1061
1081
1062
1082
case AVAHI_BROWSER_REMOVE:
1065
1085
case AVAHI_BROWSER_ALL_FOR_NOW:
1066
1086
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1067
1087
if(debug){
1068
fprintf(stderr, "No Mandos server found, still searching...\n");
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1069
1090
}
1070
1091
break;
1071
1092
}
1110
1131
/* Reject the loopback device */
1111
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1112
1133
if(debug){
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1115
1136
}
1116
1137
return false;
1117
1138
}
1118
1139
/* Accept point-to-point devices only if connect_to is specified */
1119
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1120
1141
if(debug){
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1123
1144
}
1124
1145
return true;
1125
1146
}
1126
1147
/* Otherwise, reject non-broadcast-capable devices */
1127
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1128
1149
if(debug){
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1131
1152
}
1132
1153
return false;
1133
1154
}
1134
1155
/* Reject non-ARP interfaces (including dummy interfaces) */
1135
1156
if(ifr->ifr_flags & IFF_NOARP){
1136
1157
if(debug){
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1138
1160
}
1139
1161
return false;
1140
1162
}
1141
1163
1142
1164
/* Accept this device */
1143
1165
if(debug){
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1145
1167
}
1146
1168
return true;
1147
1169
}
1152
1174
* (This function is passed to scandir(3) as a filter function.)
1153
1175
*/
1154
1176
int good_interface(const struct dirent *if_entry){
1155
int ret;
1156
1177
if(if_entry->d_name[0] == '.'){
1157
1178
return 0;
1158
1179
}
1180
1159
1181
struct ifreq ifr;
1160
1161
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
}
1162
1187
return 0;
1163
1188
}
1164
1189
1174
1199
* (This function is passed to scandir(3) as a filter function.)
1175
1200
*/
1176
1201
int up_interface(const struct dirent *if_entry){
1177
ssize_t ssret;
1178
char *flagname = NULL;
1179
1202
if(if_entry->d_name[0] == '.'){
1180
1203
return 0;
1181
1204
}
1182
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1183
if_entry->d_name);
1184
if(ret < 0){
1185
perror_plus("asprintf");
1186
return 0;
1187
}
1188
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1189
if(flags_fd == -1){
1190
perror_plus("open");
1191
free(flagname);
1192
return 0;
1193
}
1194
free(flagname);
1195
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1196
/* read line from flags_fd */
1197
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1198
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1199
flagstring[(size_t)to_read] = '\0';
1200
if(flagstring == NULL){
1201
perror_plus("malloc");
1202
close(flags_fd);
1203
return 0;
1204
}
1205
while(to_read > 0){
1206
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1207
(size_t)to_read));
1208
if(ssret == -1){
1209
perror_plus("read");
1210
free(flagstring);
1211
close(flags_fd);
1212
return 0;
1213
}
1214
to_read -= ssret;
1215
if(ssret == 0){
1216
break;
1217
}
1218
}
1219
close(flags_fd);
1220
intmax_t tmpmax;
1221
char *tmp;
1222
errno = 0;
1223
tmpmax = strtoimax(flagstring, &tmp, 0);
1224
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1225
and not (isspace(*tmp)))
1226
or tmpmax != (ifreq_flags)tmpmax){
1227
if(debug){
1228
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1229
flagstring, if_entry->d_name);
1230
}
1231
free(flagstring);
1232
return 0;
1233
}
1234
free(flagstring);
1235
ifreq_flags flags = (ifreq_flags)tmpmax;
1236
/* Reject the loopback device */
1237
if(flags & IFF_LOOPBACK){
1238
if(debug){
1239
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1240
if_entry->d_name);
1241
}
1242
return 0;
1243
}
1244
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
1245
1215
/* Reject down interfaces */
1246
if(not (flags & IFF_UP)){
1247
return 0;
1248
}
1249
1250
/* Accept point-to-point devices only if connect_to is specified */
1251
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1252
if(debug){
1253
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1254
if_entry->d_name);
1255
}
1256
return 1;
1257
}
1258
/* Otherwise, reject non-broadcast-capable devices */
1259
if(not (flags & IFF_BROADCAST)){
1260
if(debug){
1261
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1262
if_entry->d_name);
1263
}
1264
return 0;
1265
}
1266
/* Reject non-ARP interfaces (including dummy interfaces) */
1267
if(flags & IFF_NOARP){
1268
if(debug){
1269
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1270
if_entry->d_name);
1271
}
1272
return 0;
1273
}
1274
/* Accept this device */
1275
if(debug){
1276
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1277
if_entry->d_name);
1216
if(not (ifr.ifr_flags & IFF_UP)){
1217
if(debug){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1219
if_entry->d_name);
1220
}
1221
return 0;
1222
}
1223
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1226
if(debug){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1228
if_entry->d_name);
1229
}
1230
return 0;
1231
}
1232
1233
if(not good_flags(if_entry->d_name, &ifr)){
1234
return 0;
1278
1235
}
1279
1236
return 1;
1280
1237
}
1293
1250
/* Is this directory entry a runnable program? */
1294
1251
int runnable_hook(const struct dirent *direntry){
1295
1252
int ret;
1253
size_t sret;
1296
1254
struct stat st;
1297
1255
1298
1256
if((direntry->d_name)[0] == '\0'){
1300
1258
return 0;
1301
1259
}
1302
1260
1303
/* Save pointer to last character */
1304
char *end = strchr(direntry->d_name, '\0')-1;
1305
1306
if(*end == '~'){
1307
/* Backup name~ */
1308
return 0;
1309
}
1310
1311
if(((direntry->d_name)[0] == '#')
1312
and (*end == '#')){
1313
/* Temporary #name# */
1314
return 0;
1315
}
1316
1317
/* XXX more rules here */
1318
1319
ret = stat(direntry->d_name, &st);
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1263
"0123456789"
1264
"_-");
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1267
if(debug){
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1269
direntry->d_name);
1270
}
1271
return 0;
1272
}
1273
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1276
if(ret < 0){
1277
perror_plus("asprintf");
1278
return 0;
1279
}
1280
1281
ret = stat(fullname, &st);
1320
1282
if(ret == -1){
1321
1283
if(debug){
1322
perror_plus("Could not stat plugin");
1284
perror_plus("Could not stat hook");
1323
1285
}
1324
1286
return 0;
1325
1287
}
1326
if(not (st.st_mode & S_ISREG)){
1288
if(not (S_ISREG(st.st_mode))){
1327
1289
/* Not a regular file */
1290
if(debug){
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1292
direntry->d_name);
1293
}
1328
1294
return 0;
1329
1295
}
1330
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1331
1297
/* Not executable */
1298
if(debug){
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1300
direntry->d_name);
1301
}
1332
1302
return 0;
1333
1303
}
1334
1304
return 1;
1343
1313
while(true){
1344
1314
if(mc.current_server == NULL){
1345
1315
if (debug){
1346
fprintf(stderr,
1347
"Wait until first server is found. No timeout!\n");
1316
fprintf_plus(stderr, "Wait until first server is found."
1317
" No timeout!\n");
1348
1318
}
1349
1319
ret = avahi_simple_poll_iterate(s, -1);
1350
1320
} else {
1351
1321
if (debug){
1352
fprintf(stderr, "Check current_server if we should run it,"
1353
" or wait\n");
1322
fprintf_plus(stderr, "Check current_server if we should run"
1323
" it, or wait\n");
1354
1324
}
1355
1325
/* the current time */
1356
1326
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1372
1342
- ((intmax_t)waited_time.tv_nsec / 1000000));
1373
1343
1374
1344
if (debug){
1375
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1345
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1346
block_time);
1376
1347
}
1377
1348
1378
1349
if(block_time <= 0){
1398
1369
ret = avahi_simple_poll_iterate(s, (int)block_time);
1399
1370
}
1400
1371
if(ret != 0){
1401
if (ret > 0 or errno != EINTR) {
1372
if (ret > 0 or errno != EINTR){
1402
1373
return (ret != 1) ? ret : 0;
1403
1374
}
1404
1375
}
1405
1376
}
1406
1377
}
1407
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
1408
1477
int main(int argc, char *argv[]){
1409
1478
AvahiSServiceBrowser *sb = NULL;
1410
1479
int error;
1492
1561
.arg = "SECONDS",
1493
1562
.doc = "Retry interval used when denied by the mandos server",
1494
1563
.group = 2 },
1564
{ .name = "network-hook-dir", .key = 133,
1565
.arg = "DIR",
1566
.doc = "Directory where network hooks are located",
1567
.group = 2 },
1495
1568
/*
1496
1569
* These reproduce what we would get without ARGP_NO_HELP
1497
1570
*/
1550
1623
argp_error(state, "Bad retry interval");
1551
1624
}
1552
1625
break;
1626
case 133: /* --network-hook-dir */
1627
hookdir = arg;
1628
break;
1553
1629
/*
1554
1630
* These reproduce what we would get without ARGP_NO_HELP
1555
1631
*/
1561
1637
argp_state_help(state, state->out_stream,
1562
1638
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1563
1639
case 'V': /* --version */
1564
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);
1565
1643
exit(argp_err_exit_status);
1566
1644
break;
1567
1645
default:
1612
1690
if(ret == -1){
1613
1691
perror_plus("fstat");
1614
1692
} else {
1615
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){
1616
1695
ret = fchown(seckey_fd, uid, gid);
1617
1696
if(ret == -1){
1618
1697
perror_plus("fchown");
1632
1711
if(ret == -1){
1633
1712
perror_plus("fstat");
1634
1713
} else {
1635
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){
1636
1716
ret = fchown(pubkey_fd, uid, gid);
1637
1717
if(ret == -1){
1638
1718
perror_plus("fchown");
1651
1731
}
1652
1732
}
1653
1733
1654
/* Find network hooks and run them */
1734
/* Run network hooks */
1655
1735
{
1656
struct dirent **direntries;
1657
struct dirent *direntry;
1658
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1659
alphasort);
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[0];
1663
char *fullname = NULL;
1664
ret = asprintf(&fullname, "%s/%s", tempdir,
1665
direntry->d_name);
1666
if(ret < 0){
1667
perror_plus("asprintf");
1668
continue;
1669
}
1670
pid_t hook_pid = fork();
1671
if(hook_pid == 0){
1672
/* Child */
1673
dup2(devnull, STDIN_FILENO);
1674
close(devnull);
1675
dup2(STDERR_FILENO, STDOUT_FILENO);
1676
setenv("DEVICE", interface, 1);
1677
setenv("VERBOSE", debug ? "1" : "0", 1);
1678
setenv("MODE", "start", 1);
1679
/* setenv( XXX more here */
1680
ret = execl(fullname, direntry->d_name, "start");
1681
perror_plus("execl");
1682
}
1683
free(fullname);
1684
if(quit_now){
1685
goto end;
1686
}
1687
}
1688
close(devnull);
1736
/* Re-raise priviliges */
1737
errno = 0;
1738
ret = seteuid(0);
1739
if(ret == -1){
1740
perror_plus("seteuid");
1741
}
1742
if(not run_network_hooks("start", interface, delay)){
1743
goto end;
1744
}
1745
/* Lower privileges */
1746
errno = 0;
1747
ret = seteuid(uid);
1748
if(ret == -1){
1749
perror_plus("seteuid");
1750
}
1689
1751
}
1690
1752
1691
1753
if(not debug){
1694
1756
1695
1757
if(interface[0] == '\0'){
1696
1758
struct dirent **direntries;
1697
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,
1698
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
}
1699
1768
if(ret >= 1){
1700
/* Pick the first good interface */
1769
/* Pick the first interface returned */
1701
1770
interface = strdup(direntries[0]->d_name);
1702
1771
if(debug){
1703
fprintf(stderr, "Using interface \"%s\"\n", interface);
1772
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1704
1773
}
1705
1774
if(interface == NULL){
1706
1775
perror_plus("malloc");
1711
1780
free(direntries);
1712
1781
} else {
1713
1782
free(direntries);
1714
fprintf(stderr, "Could not find a network interface\n");
1783
fprintf_plus(stderr, "Could not find a network interface\n");
1715
1784
exitcode = EXIT_FAILURE;
1716
1785
goto end;
1717
1786
}
1723
1792
srand((unsigned int) time(NULL));
1724
1793
mc.simple_poll = avahi_simple_poll_new();
1725
1794
if(mc.simple_poll == NULL){
1726
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1795
fprintf_plus(stderr,
1796
"Avahi: Failed to create simple poll object.\n");
1727
1797
exitcode = EX_UNAVAILABLE;
1728
1798
goto end;
1729
1799
}
1795
1865
if(strcmp(interface, "none") != 0){
1796
1866
if_index = (AvahiIfIndex) if_nametoindex(interface);
1797
1867
if(if_index == 0){
1798
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1868
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1799
1869
exitcode = EX_UNAVAILABLE;
1800
1870
goto end;
1801
1871
}
1921
1991
#endif /* __linux__ */
1922
1992
/* Lower privileges */
1923
1993
errno = 0;
1924
if(take_down_interface){
1925
/* Lower privileges */
1926
ret = seteuid(uid);
1927
if(ret == -1){
1928
perror_plus("seteuid");
1929
}
1930
} else {
1931
/* Lower privileges permanently */
1932
ret = setuid(uid);
1933
if(ret == -1){
1934
perror_plus("setuid");
1935
}
1994
/* Lower privileges */
1995
ret = seteuid(uid);
1996
if(ret == -1){
1997
perror_plus("seteuid");
1936
1998
}
1937
1999
}
1938
2000
1942
2004
1943
2005
ret = init_gnutls_global(pubkey, seckey);
1944
2006
if(ret == -1){
1945
fprintf(stderr, "init_gnutls_global failed\n");
2007
fprintf_plus(stderr, "init_gnutls_global failed\n");
1946
2008
exitcode = EX_UNAVAILABLE;
1947
2009
goto end;
1948
2010
} else {
1964
2026
}
1965
2027
1966
2028
if(not init_gpgme(pubkey, seckey, tempdir)){
1967
fprintf(stderr, "init_gpgme failed\n");
2029
fprintf_plus(stderr, "init_gpgme failed\n");
1968
2030
exitcode = EX_UNAVAILABLE;
1969
2031
goto end;
1970
2032
} else {
1980
2042
/* (Mainly meant for debugging) */
1981
2043
char *address = strrchr(connect_to, ':');
1982
2044
if(address == NULL){
1983
fprintf(stderr, "No colon in address\n");
2045
fprintf_plus(stderr, "No colon in address\n");
1984
2046
exitcode = EX_USAGE;
1985
2047
goto end;
1986
2048
}
1994
2056
tmpmax = strtoimax(address+1, &tmp, 10);
1995
2057
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1996
2058
or tmpmax != (uint16_t)tmpmax){
1997
fprintf(stderr, "Bad port number\n");
2059
fprintf_plus(stderr, "Bad port number\n");
1998
2060
exitcode = EX_USAGE;
1999
2061
goto end;
2000
2062
}
2030
2092
break;
2031
2093
}
2032
2094
if(debug){
2033
fprintf(stderr, "Retrying in %d seconds\n",
2034
(int)retry_interval);
2095
fprintf_plus(stderr, "Retrying in %d seconds\n",
2096
(int)retry_interval);
2035
2097
}
2036
2098
sleep((int)retry_interval);
2037
2099
}
2067
2129
2068
2130
/* Check if creating the Avahi server object succeeded */
2069
2131
if(mc.server == NULL){
2070
fprintf(stderr, "Failed to create Avahi server: %s\n",
2071
avahi_strerror(error));
2132
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2133
avahi_strerror(error));
2072
2134
exitcode = EX_UNAVAILABLE;
2073
2135
goto end;
2074
2136
}
2082
2144
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2083
2145
NULL, 0, browse_callback, NULL);
2084
2146
if(sb == NULL){
2085
fprintf(stderr, "Failed to create service browser: %s\n",
2086
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)));
2087
2149
exitcode = EX_UNAVAILABLE;
2088
2150
goto end;
2089
2151
}
2095
2157
/* Run the main loop */
2096
2158
2097
2159
if(debug){
2098
fprintf(stderr, "Starting Avahi loop search\n");
2160
fprintf_plus(stderr, "Starting Avahi loop search\n");
2099
2161
}
2100
2162
2101
2163
ret = avahi_loop_with_timeout(mc.simple_poll,
2102
2164
(int)(retry_interval * 1000));
2103
2165
if(debug){
2104
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2105
(ret == 0) ? "successfully" : "with error");
2166
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2167
(ret == 0) ? "successfully" : "with error");
2106
2168
}
2107
2169
2108
2170
end:
2109
2171
2110
2172
if(debug){
2111
fprintf(stderr, "%s exiting\n", argv[0]);
2173
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2112
2174
}
2113
2175
2114
2176
/* Cleanup things */
2142
2204
}
2143
2205
}
2144
2206
2145
/* XXX run network hooks "stop" here */
2146
2147
/* Take down the network interface */
2148
if(take_down_interface){
2149
/* Re-raise priviliges */
2207
/* Re-raise priviliges */
2208
{
2150
2209
errno = 0;
2151
2210
ret = seteuid(0);
2152
2211
if(ret == -1){
2153
2212
perror_plus("seteuid");
2154
2213
}
2155
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){
2156
2221
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2157
2222
if(ret == -1){
2158
2223
perror_plus("ioctl SIOCGIFFLAGS");
2159
} else if(network.ifr_flags & IFF_UP) {
2224
} else if(network.ifr_flags & IFF_UP){
2160
2225
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2161
2226
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2162
2227
if(ret == -1){
2167
2232
if(ret == -1){
2168
2233
perror_plus("close");
2169
2234
}
2170
/* Lower privileges permanently */
2171
errno = 0;
2172
ret = setuid(uid);
2173
if(ret == -1){
2174
perror_plus("setuid");
2175
}
2176
2235
}
2177
2236
}
2237
/* Lower privileges permanently */
2238
errno = 0;
2239
ret = setuid(uid);
2240
if(ret == -1){
2241
perror_plus("setuid");
2242
}
2178
2243
2179
2244
/* Removes the GPGME temp directory and all files inside */
2180
2245
if(tempdir_created){
2194
2259
}
2195
2260
ret = remove(fullname);
2196
2261
if(ret == -1){
2197
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2198
strerror(errno));
2262
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2263
strerror(errno));
2199
2264
}
2200
2265
free(fullname);
2201
2266
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0