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- Committer: teddy at bsnet
- Date: 2011-11-12 17:43:12 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@fukt.bsnet.se-20111112174312-a227djujmo3oxw9m
* plugins.d/mandos-client.c (runnable_hook): Bug fix: stat using the
full path.
(mail): Take new "--network-hook-dir" option.
full path.
(mail): Take new "--network-hook-dir" option.
- files removed:
- debian/mandos-client.examples
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
76
setgid(), pause() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
#include <argz.h> /* argz_add_sep(), argz_next(),
92
argz_delete(), argz_append(),
93
argz_stringify(), argz_add(),
94
argz_count() */
95
90
96
91
#ifdef __linux__
97
92
#include <sys/klog.h> /* klogctl() */
115
110
init_gnutls_session(),
116
111
GNUTLS_* */
117
112
#include <gnutls/openpgp.h>
118
/* gnutls_certificate_set_openpgp_key_file(),
119
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
120
115
121
116
/* GPGME */
122
117
#include <gpgme.h> /* All GPGME types, constants and
139
134
static const char sys_class_net[] = "/sys/class/net";
140
135
char *connect_to = NULL;
141
136
const char *hookdir = HOOKDIR;
142
uid_t uid = 65534;
143
gid_t gid = 65534;
144
137
145
138
/* Doubly linked list that need to be circularly linked when used */
146
139
typedef struct server{
176
169
177
170
/* Function to use when printing errors */
178
171
void perror_plus(const char *print_text){
179
int e = errno;
180
172
fprintf(stderr, "Mandos plugin %s: ",
181
173
program_invocation_short_name);
182
errno = e;
183
174
perror(print_text);
184
175
}
185
176
186
__attribute__((format (gnu_printf, 2, 3)))
187
int fprintf_plus(FILE *stream, const char *format, ...){
188
va_list ap;
189
va_start (ap, format);
190
191
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
192
program_invocation_short_name));
193
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
194
}
195
196
177
/*
197
178
* Make additional room in "buffer" for at least BUFFER_SIZE more
198
179
* bytes. "buffer_capacity" is how much is currently allocated,
199
180
* "buffer_length" is how much is already used.
200
181
*/
201
182
size_t incbuffer(char **buffer, size_t buffer_length,
202
size_t buffer_capacity){
183
size_t buffer_capacity){
203
184
if(buffer_length + BUFFER_SIZE > buffer_capacity){
204
185
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
205
186
if(buffer == NULL){
211
192
}
212
193
213
194
/* Add server to set of servers to retry periodically */
214
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
215
int af){
195
int add_server(const char *ip, uint16_t port,
196
AvahiIfIndex if_index,
197
int af){
216
198
int ret;
217
199
server *new_server = malloc(sizeof(server));
218
200
if(new_server == NULL){
219
201
perror_plus("malloc");
220
return false;
202
return -1;
221
203
}
222
204
*new_server = (server){ .ip = strdup(ip),
223
.port = port,
224
.if_index = if_index,
225
.af = af };
205
.port = port,
206
.if_index = if_index,
207
.af = af };
226
208
if(new_server->ip == NULL){
227
209
perror_plus("strdup");
228
return false;
210
return -1;
229
211
}
230
212
/* Special case of first server */
231
213
if (mc.current_server == NULL){
242
224
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
243
225
if(ret == -1){
244
226
perror_plus("clock_gettime");
245
return false;
227
return -1;
246
228
}
247
return true;
229
return 0;
248
230
}
249
231
250
232
/*
251
233
* Initialize GPGME.
252
234
*/
253
static bool init_gpgme(const char *seckey, const char *pubkey,
254
const char *tempdir){
235
static bool init_gpgme(const char *seckey,
236
const char *pubkey, const char *tempdir){
255
237
gpgme_error_t rc;
256
238
gpgme_engine_info_t engine_info;
257
239
272
254
273
255
rc = gpgme_data_new_from_fd(&pgp_data, fd);
274
256
if(rc != GPG_ERR_NO_ERROR){
275
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
276
gpgme_strsource(rc), gpgme_strerror(rc));
257
fprintf(stderr, "Mandos plugin mandos-client: "
258
"bad gpgme_data_new_from_fd: %s: %s\n",
259
gpgme_strsource(rc), gpgme_strerror(rc));
277
260
return false;
278
261
}
279
262
280
263
rc = gpgme_op_import(mc.ctx, pgp_data);
281
264
if(rc != GPG_ERR_NO_ERROR){
282
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
265
fprintf(stderr, "Mandos plugin mandos-client: "
266
"bad gpgme_op_import: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
284
268
return false;
285
269
}
286
270
293
277
}
294
278
295
279
if(debug){
296
fprintf_plus(stderr, "Initializing GPGME\n");
280
fprintf(stderr, "Mandos plugin mandos-client: "
281
"Initializing GPGME\n");
297
282
}
298
283
299
284
/* Init GPGME */
300
285
gpgme_check_version(NULL);
301
286
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
302
287
if(rc != GPG_ERR_NO_ERROR){
303
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
288
fprintf(stderr, "Mandos plugin mandos-client: "
289
"bad gpgme_engine_check_version: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
305
291
return false;
306
292
}
307
293
308
294
/* Set GPGME home directory for the OpenPGP engine only */
309
295
rc = gpgme_get_engine_info(&engine_info);
310
296
if(rc != GPG_ERR_NO_ERROR){
311
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
312
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf(stderr, "Mandos plugin mandos-client: "
298
"bad gpgme_get_engine_info: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
313
300
return false;
314
301
}
315
302
while(engine_info != NULL){
321
308
engine_info = engine_info->next;
322
309
}
323
310
if(engine_info == NULL){
324
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
325
tempdir);
311
fprintf(stderr, "Mandos plugin mandos-client: "
312
"Could not set GPGME home dir to %s\n", tempdir);
326
313
return false;
327
314
}
328
315
329
316
/* Create new GPGME "context" */
330
317
rc = gpgme_new(&(mc.ctx));
331
318
if(rc != GPG_ERR_NO_ERROR){
332
fprintf_plus(stderr, "Mandos plugin mandos-client: "
333
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
334
gpgme_strerror(rc));
319
fprintf(stderr, "Mandos plugin mandos-client: "
320
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
321
gpgme_strerror(rc));
335
322
return false;
336
323
}
337
324
356
343
ssize_t plaintext_length = 0;
357
344
358
345
if(debug){
359
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
346
fprintf(stderr, "Mandos plugin mandos-client: "
347
"Trying to decrypt OpenPGP data\n");
360
348
}
361
349
362
350
/* Create new GPGME data buffer from memory cryptotext */
363
351
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
364
352
0);
365
353
if(rc != GPG_ERR_NO_ERROR){
366
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
354
fprintf(stderr, "Mandos plugin mandos-client: "
355
"bad gpgme_data_new_from_mem: %s: %s\n",
356
gpgme_strsource(rc), gpgme_strerror(rc));
368
357
return -1;
369
358
}
370
359
371
360
/* Create new empty GPGME data buffer for the plaintext */
372
361
rc = gpgme_data_new(&dh_plain);
373
362
if(rc != GPG_ERR_NO_ERROR){
374
fprintf_plus(stderr, "Mandos plugin mandos-client: "
375
"bad gpgme_data_new: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
363
fprintf(stderr, "Mandos plugin mandos-client: "
364
"bad gpgme_data_new: %s: %s\n",
365
gpgme_strsource(rc), gpgme_strerror(rc));
377
366
gpgme_data_release(dh_crypto);
378
367
return -1;
379
368
}
382
371
data buffer */
383
372
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
384
373
if(rc != GPG_ERR_NO_ERROR){
385
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
386
gpgme_strsource(rc), gpgme_strerror(rc));
374
fprintf(stderr, "Mandos plugin mandos-client: "
375
"bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
387
377
plaintext_length = -1;
388
378
if(debug){
389
379
gpgme_decrypt_result_t result;
390
380
result = gpgme_op_decrypt_result(mc.ctx);
391
381
if(result == NULL){
392
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf(stderr, "Mandos plugin mandos-client: "
383
"gpgme_op_decrypt_result failed\n");
393
384
} else {
394
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
395
result->unsupported_algorithm);
396
fprintf_plus(stderr, "Wrong key usage: %u\n",
397
result->wrong_key_usage);
385
fprintf(stderr, "Mandos plugin mandos-client: "
386
"Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf(stderr, "Mandos plugin mandos-client: "
389
"Wrong key usage: %u\n",
390
result->wrong_key_usage);
398
391
if(result->file_name != NULL){
399
fprintf_plus(stderr, "File name: %s\n", result->file_name);
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"File name: %s\n", result->file_name);
400
394
}
401
395
gpgme_recipient_t recipient;
402
396
recipient = result->recipients;
403
397
while(recipient != NULL){
404
fprintf_plus(stderr, "Public key algorithm: %s\n",
405
gpgme_pubkey_algo_name
406
(recipient->pubkey_algo));
407
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
408
fprintf_plus(stderr, "Secret key available: %s\n",
409
recipient->status == GPG_ERR_NO_SECKEY
410
? "No" : "Yes");
398
fprintf(stderr, "Mandos plugin mandos-client: "
399
"Public key algorithm: %s\n",
400
gpgme_pubkey_algo_name(recipient->pubkey_algo));
401
fprintf(stderr, "Mandos plugin mandos-client: "
402
"Key ID: %s\n", recipient->keyid);
403
fprintf(stderr, "Mandos plugin mandos-client: "
404
"Secret key available: %s\n",
405
recipient->status == GPG_ERR_NO_SECKEY
406
? "No" : "Yes");
411
407
recipient = recipient->next;
412
408
}
413
409
}
416
412
}
417
413
418
414
if(debug){
419
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
415
fprintf(stderr, "Mandos plugin mandos-client: "
416
"Decryption of OpenPGP data succeeded\n");
420
417
}
421
418
422
419
/* Seek back to the beginning of the GPGME plaintext data buffer */
429
426
*plaintext = NULL;
430
427
while(true){
431
428
plaintext_capacity = incbuffer(plaintext,
432
(size_t)plaintext_length,
433
plaintext_capacity);
429
(size_t)plaintext_length,
430
plaintext_capacity);
434
431
if(plaintext_capacity == 0){
435
perror_plus("incbuffer");
436
plaintext_length = -1;
437
goto decrypt_end;
432
perror_plus("incbuffer");
433
plaintext_length = -1;
434
goto decrypt_end;
438
435
}
439
436
440
437
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
453
450
}
454
451
455
452
if(debug){
456
fprintf_plus(stderr, "Decrypted password is: ");
453
fprintf(stderr, "Mandos plugin mandos-client: "
454
"Decrypted password is: ");
457
455
for(ssize_t i = 0; i < plaintext_length; i++){
458
456
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
459
457
}
481
479
/* GnuTLS log function callback */
482
480
static void debuggnutls(__attribute__((unused)) int level,
483
481
const char* string){
484
fprintf_plus(stderr, "GnuTLS: %s", string);
482
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
485
483
}
486
484
487
485
static int init_gnutls_global(const char *pubkeyfilename,
489
487
int ret;
490
488
491
489
if(debug){
492
fprintf_plus(stderr, "Initializing GnuTLS\n");
490
fprintf(stderr, "Mandos plugin mandos-client: "
491
"Initializing GnuTLS\n");
493
492
}
494
493
495
494
ret = gnutls_global_init();
496
495
if(ret != GNUTLS_E_SUCCESS){
497
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
498
safer_gnutls_strerror(ret));
496
fprintf(stderr, "Mandos plugin mandos-client: "
497
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
499
498
return -1;
500
499
}
501
500
510
509
/* OpenPGP credentials */
511
510
ret = gnutls_certificate_allocate_credentials(&mc.cred);
512
511
if(ret != GNUTLS_E_SUCCESS){
513
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
514
safer_gnutls_strerror(ret));
512
fprintf(stderr, "Mandos plugin mandos-client: "
513
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
515
514
gnutls_global_deinit();
516
515
return -1;
517
516
}
518
517
519
518
if(debug){
520
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
521
" secret key %s as GnuTLS credentials\n",
522
pubkeyfilename,
523
seckeyfilename);
519
fprintf(stderr, "Mandos plugin mandos-client: "
520
"Attempting to use OpenPGP public key %s and"
521
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
522
seckeyfilename);
524
523
}
525
524
526
525
ret = gnutls_certificate_set_openpgp_key_file
527
526
(mc.cred, pubkeyfilename, seckeyfilename,
528
527
GNUTLS_OPENPGP_FMT_BASE64);
529
528
if(ret != GNUTLS_E_SUCCESS){
530
fprintf_plus(stderr,
531
"Error[%d] while reading the OpenPGP key pair ('%s',"
532
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
533
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
534
safer_gnutls_strerror(ret));
529
fprintf(stderr,
530
"Mandos plugin mandos-client: "
531
"Error[%d] while reading the OpenPGP key pair ('%s',"
532
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
533
fprintf(stderr, "Mandos plugin mandos-client: "
534
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
535
535
goto globalfail;
536
536
}
537
537
538
538
/* GnuTLS server initialization */
539
539
ret = gnutls_dh_params_init(&mc.dh_params);
540
540
if(ret != GNUTLS_E_SUCCESS){
541
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
542
" initialization: %s\n",
543
safer_gnutls_strerror(ret));
541
fprintf(stderr, "Mandos plugin mandos-client: "
542
"Error in GnuTLS DH parameter initialization:"
543
" %s\n", safer_gnutls_strerror(ret));
544
544
goto globalfail;
545
545
}
546
546
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
547
547
if(ret != GNUTLS_E_SUCCESS){
548
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS prime generation: %s\n",
550
safer_gnutls_strerror(ret));
550
551
goto globalfail;
551
552
}
552
553
572
573
}
573
574
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
575
if(ret != GNUTLS_E_SUCCESS){
575
fprintf_plus(stderr,
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
576
fprintf(stderr, "Mandos plugin mandos-client: "
577
"Error in GnuTLS session initialization: %s\n",
578
safer_gnutls_strerror(ret));
578
579
}
579
580
580
581
{
587
588
}
588
589
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
590
if(ret != GNUTLS_E_SUCCESS){
590
fprintf_plus(stderr, "Syntax error at: %s\n", err);
591
fprintf_plus(stderr, "GnuTLS error: %s\n",
592
safer_gnutls_strerror(ret));
591
fprintf(stderr, "Mandos plugin mandos-client: "
592
"Syntax error at: %s\n", err);
593
fprintf(stderr, "Mandos plugin mandos-client: "
594
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
593
595
gnutls_deinit(*session);
594
596
return -1;
595
597
}
604
606
}
605
607
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
606
608
if(ret != GNUTLS_E_SUCCESS){
607
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
608
safer_gnutls_strerror(ret));
609
fprintf(stderr, "Mandos plugin mandos-client: "
610
"Error setting GnuTLS credentials: %s\n",
611
safer_gnutls_strerror(ret));
609
612
gnutls_deinit(*session);
610
613
return -1;
611
614
}
656
659
pf = PF_INET;
657
660
break;
658
661
default:
659
fprintf_plus(stderr, "Bad address family: %d\n", af);
662
fprintf(stderr, "Mandos plugin mandos-client: "
663
"Bad address family: %d\n", af);
660
664
errno = EINVAL;
661
665
return -1;
662
666
}
667
671
}
668
672
669
673
if(debug){
670
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
671
PRIu16 "\n", ip, port);
674
fprintf(stderr, "Mandos plugin mandos-client: "
675
"Setting up a TCP connection to %s, port %" PRIu16
676
"\n", ip, port);
672
677
}
673
678
674
679
tcp_sd = socket(pf, SOCK_STREAM, 0);
700
705
}
701
706
if(ret == 0){
702
707
int e = errno;
703
fprintf_plus(stderr, "Bad address: %s\n", ip);
708
fprintf(stderr, "Mandos plugin mandos-client: "
709
"Bad address: %s\n", ip);
704
710
errno = e;
705
711
goto mandos_end;
706
712
}
711
717
712
718
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
713
719
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
714
-Wunreachable-code*/
720
-Wunreachable-code*/
715
721
if(if_index == AVAHI_IF_UNSPEC){
716
fprintf_plus(stderr, "An IPv6 link-local address is"
717
" incomplete without a network interface\n");
722
fprintf(stderr, "Mandos plugin mandos-client: "
723
"An IPv6 link-local address is incomplete"
724
" without a network interface\n");
718
725
errno = EINVAL;
719
726
goto mandos_end;
720
727
}
738
745
if(if_indextoname((unsigned int)if_index, interface) == NULL){
739
746
perror_plus("if_indextoname");
740
747
} else {
741
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
742
"\n", ip, interface, port);
748
fprintf(stderr, "Mandos plugin mandos-client: "
749
"Connection to: %s%%%s, port %" PRIu16 "\n",
750
ip, interface, port);
743
751
}
744
752
} else {
745
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
746
ip, port);
753
fprintf(stderr, "Mandos plugin mandos-client: "
754
"Connection to: %s, port %" PRIu16 "\n", ip, port);
747
755
}
748
756
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
749
757
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
759
767
perror_plus("inet_ntop");
760
768
} else {
761
769
if(strcmp(addrstr, ip) != 0){
762
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
770
fprintf(stderr, "Mandos plugin mandos-client: "
771
"Canonical address form: %s\n", addrstr);
763
772
}
764
773
}
765
774
}
793
802
while(true){
794
803
size_t out_size = strlen(out);
795
804
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
796
out_size - written));
805
out_size - written));
797
806
if(ret == -1){
798
807
int e = errno;
799
808
perror_plus("write");
819
828
}
820
829
821
830
if(debug){
822
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
831
fprintf(stderr, "Mandos plugin mandos-client: "
832
"Establishing TLS session with %s\n", ip);
823
833
}
824
834
825
835
if(quit_now){
827
837
goto mandos_end;
828
838
}
829
839
830
/* This casting via intptr_t is to eliminate warning about casting
831
an int to a pointer type. This is exactly how the GnuTLS Guile
832
function "set-session-transport-fd!" does it. */
833
gnutls_transport_set_ptr(session,
834
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
840
/* Spurious warning from -Wint-to-pointer-cast */
841
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
835
842
836
843
if(quit_now){
837
844
errno = EINTR;
848
855
849
856
if(ret != GNUTLS_E_SUCCESS){
850
857
if(debug){
851
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
858
fprintf(stderr, "Mandos plugin mandos-client: "
859
"*** GnuTLS Handshake failed ***\n");
852
860
gnutls_perror(ret);
853
861
}
854
862
errno = EPROTO;
858
866
/* Read OpenPGP packet that contains the wanted password */
859
867
860
868
if(debug){
861
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
862
" %s\n", ip);
869
fprintf(stderr, "Mandos plugin mandos-client: "
870
"Retrieving OpenPGP encrypted password from %s\n", ip);
863
871
}
864
872
865
873
while(true){
870
878
}
871
879
872
880
buffer_capacity = incbuffer(&buffer, buffer_length,
873
buffer_capacity);
881
buffer_capacity);
874
882
if(buffer_capacity == 0){
875
883
int e = errno;
876
884
perror_plus("incbuffer");
903
911
}
904
912
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
905
913
if(ret < 0){
906
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
907
"***\n");
914
fprintf(stderr, "Mandos plugin mandos-client: "
915
"*** GnuTLS Re-handshake failed ***\n");
908
916
gnutls_perror(ret);
909
917
errno = EPROTO;
910
918
goto mandos_end;
911
919
}
912
920
break;
913
921
default:
914
fprintf_plus(stderr, "Unknown error while reading data from"
915
" encrypted session with Mandos server\n");
922
fprintf(stderr, "Mandos plugin mandos-client: "
923
"Unknown error while reading data from"
924
" encrypted session with Mandos server\n");
916
925
gnutls_bye(session, GNUTLS_SHUT_RDWR);
917
926
errno = EIO;
918
927
goto mandos_end;
923
932
}
924
933
925
934
if(debug){
926
fprintf_plus(stderr, "Closing TLS session\n");
935
fprintf(stderr, "Mandos plugin mandos-client: "
936
"Closing TLS session\n");
927
937
}
928
938
929
939
if(quit_now){
941
951
942
952
if(buffer_length > 0){
943
953
ssize_t decrypted_buffer_size;
944
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
954
decrypted_buffer_size = pgp_packet_decrypt(buffer,
955
buffer_length,
945
956
&decrypted_buffer);
946
957
if(decrypted_buffer_size >= 0){
947
958
958
969
if(ret == 0 and ferror(stdout)){
959
970
int e = errno;
960
971
if(debug){
961
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
962
strerror(errno));
972
fprintf(stderr, "Mandos plugin mandos-client: "
973
"Error writing encrypted data: %s\n",
974
strerror(errno));
963
975
}
964
976
errno = e;
965
977
goto mandos_end;
1022
1034
switch(event){
1023
1035
default:
1024
1036
case AVAHI_RESOLVER_FAILURE:
1025
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1026
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1027
domain,
1028
avahi_strerror(avahi_server_errno(mc.server)));
1037
fprintf(stderr, "Mandos plugin mandos-client: "
1038
"(Avahi Resolver) Failed to resolve service '%s'"
1039
" of type '%s' in domain '%s': %s\n", name, type, domain,
1040
avahi_strerror(avahi_server_errno(mc.server)));
1029
1041
break;
1030
1042
1031
1043
case AVAHI_RESOLVER_FOUND:
1033
1045
char ip[AVAHI_ADDRESS_STR_MAX];
1034
1046
avahi_address_snprint(ip, sizeof(ip), address);
1035
1047
if(debug){
1036
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1037
PRIdMAX ") on port %" PRIu16 "\n", name,
1038
host_name, ip, (intmax_t)interface, port);
1048
fprintf(stderr, "Mandos plugin mandos-client: "
1049
"Mandos server \"%s\" found on %s (%s, %"
1050
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1051
ip, (intmax_t)interface, port);
1039
1052
}
1040
1053
int ret = start_mandos_communication(ip, port, interface,
1041
1054
avahi_proto_to_af(proto));
1042
1055
if(ret == 0){
1043
1056
avahi_simple_poll_quit(mc.simple_poll);
1044
1057
} else {
1045
if(not add_server(ip, port, interface,
1046
avahi_proto_to_af(proto))){
1047
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1048
" list\n", name);
1049
}
1058
ret = add_server(ip, port, interface,
1059
avahi_proto_to_af(proto));
1050
1060
}
1051
1061
}
1052
1062
}
1076
1086
default:
1077
1087
case AVAHI_BROWSER_FAILURE:
1078
1088
1079
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1089
fprintf(stderr, "Mandos plugin mandos-client: "
1090
"(Avahi browser) %s\n",
1091
avahi_strerror(avahi_server_errno(mc.server)));
1081
1092
avahi_simple_poll_quit(mc.simple_poll);
1082
1093
return;
1083
1094
1090
1101
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
1102
name, type, domain, protocol, 0,
1092
1103
resolve_callback, NULL) == NULL)
1093
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1094
" %s\n", name,
1095
avahi_strerror(avahi_server_errno(mc.server)));
1104
fprintf(stderr, "Mandos plugin mandos-client: "
1105
"Avahi: Failed to resolve service '%s': %s\n",
1106
name, avahi_strerror(avahi_server_errno(mc.server)));
1096
1107
break;
1097
1108
1098
1109
case AVAHI_BROWSER_REMOVE:
1101
1112
case AVAHI_BROWSER_ALL_FOR_NOW:
1102
1113
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1103
1114
if(debug){
1104
fprintf_plus(stderr, "No Mandos server found, still"
1105
" searching...\n");
1115
fprintf(stderr, "Mandos plugin mandos-client: "
1116
"No Mandos server found, still searching...\n");
1106
1117
}
1107
1118
break;
1108
1119
}
1125
1136
1126
1137
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1138
int ret;
1128
error_t ret_errno;
1129
1139
1130
1140
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1131
1141
if(s < 0){
1132
ret_errno = errno;
1133
1142
perror_plus("socket");
1134
errno = ret_errno;
1135
1143
return false;
1136
1144
}
1137
1145
strcpy(ifr->ifr_name, ifname);
1138
1146
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1139
1147
if(ret == -1){
1140
1148
if(debug){
1141
ret_errno = errno;
1142
1149
perror_plus("ioctl SIOCGIFFLAGS");
1143
errno = ret_errno;
1144
1150
}
1145
1151
return false;
1146
1152
}
1152
1158
/* Reject the loopback device */
1153
1159
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
1160
if(debug){
1155
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1156
ifname);
1161
fprintf(stderr, "Mandos plugin mandos-client: "
1162
"Rejecting loopback interface \"%s\"\n", ifname);
1157
1163
}
1158
1164
return false;
1159
1165
}
1160
1166
/* Accept point-to-point devices only if connect_to is specified */
1161
1167
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
1168
if(debug){
1163
fprintf_plus(stderr, "Accepting point-to-point interface"
1164
" \"%s\"\n", ifname);
1169
fprintf(stderr, "Mandos plugin mandos-client: "
1170
"Accepting point-to-point interface \"%s\"\n", ifname);
1165
1171
}
1166
1172
return true;
1167
1173
}
1168
1174
/* Otherwise, reject non-broadcast-capable devices */
1169
1175
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
1176
if(debug){
1171
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1172
" \"%s\"\n", ifname);
1177
fprintf(stderr, "Mandos plugin mandos-client: "
1178
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1173
1179
}
1174
1180
return false;
1175
1181
}
1176
1182
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
1183
if(ifr->ifr_flags & IFF_NOARP){
1178
1184
if(debug){
1179
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
ifname);
1185
fprintf(stderr, "Mandos plugin mandos-client: "
1186
"Rejecting non-ARP interface \"%s\"\n", ifname);
1181
1187
}
1182
1188
return false;
1183
1189
}
1184
1190
1185
1191
/* Accept this device */
1186
1192
if(debug){
1187
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
fprintf(stderr, "Mandos plugin mandos-client: "
1194
"Interface \"%s\" is good\n", ifname);
1188
1195
}
1189
1196
return true;
1190
1197
}
1202
1209
struct ifreq ifr;
1203
1210
if(not get_flags(if_entry->d_name, &ifr)){
1204
1211
if(debug){
1205
fprintf_plus(stderr, "Failed to get flags for interface "
1206
"\"%s\"\n", if_entry->d_name);
1207
}
1208
return 0;
1209
}
1210
1211
if(not good_flags(if_entry->d_name, &ifr)){
1212
return 0;
1213
}
1214
return 1;
1215
}
1216
1217
/*
1218
* This function determines if a network interface is up.
1219
*/
1220
bool interface_is_up(const char *interface){
1221
struct ifreq ifr;
1222
if(not get_flags(interface, &ifr)){
1223
if(debug){
1224
fprintf_plus(stderr, "Failed to get flags for interface "
1225
"\"%s\"\n", interface);
1226
}
1227
return false;
1228
}
1229
1230
return (bool)(ifr.ifr_flags & IFF_UP);
1231
}
1232
1233
/*
1234
* This function determines if a network interface is running
1235
*/
1236
bool interface_is_running(const char *interface){
1237
struct ifreq ifr;
1238
if(not get_flags(interface, &ifr)){
1239
if(debug){
1240
fprintf_plus(stderr, "Failed to get flags for interface "
1241
"\"%s\"\n", interface);
1242
}
1243
return false;
1244
}
1245
1246
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1212
fprintf(stderr, "Mandos plugin mandos-client: "
1213
"Failed to get flags for interface \"%s\"\n",
1214
if_entry->d_name);
1215
}
1216
return 0;
1217
}
1218
1219
if(not good_flags(if_entry->d_name, &ifr)){
1220
return 0;
1221
}
1222
return 1;
1223
}
1224
1225
/*
1226
* This function determines if a directory entry in /sys/class/net
1227
* corresponds to an acceptable network device which is up.
1228
* (This function is passed to scandir(3) as a filter function.)
1229
*/
1230
int up_interface(const struct dirent *if_entry){
1231
if(if_entry->d_name[0] == '.'){
1232
return 0;
1233
}
1234
1235
struct ifreq ifr;
1236
if(not get_flags(if_entry->d_name, &ifr)){
1237
if(debug){
1238
fprintf(stderr, "Mandos plugin mandos-client: "
1239
"Failed to get flags for interface \"%s\"\n",
1240
if_entry->d_name);
1241
}
1242
return 0;
1243
}
1244
1245
/* Reject down interfaces */
1246
if(not (ifr.ifr_flags & IFF_UP)){
1247
if(debug){
1248
fprintf(stderr, "Mandos plugin mandos-client: "
1249
"Rejecting down interface \"%s\"\n",
1250
if_entry->d_name);
1251
}
1252
return 0;
1253
}
1254
1255
/* Reject non-running interfaces */
1256
if(not (ifr.ifr_flags & IFF_RUNNING)){
1257
if(debug){
1258
fprintf(stderr, "Mandos plugin mandos-client: "
1259
"Rejecting non-running interface \"%s\"\n",
1260
if_entry->d_name);
1261
}
1262
return 0;
1263
}
1264
1265
if(not good_flags(if_entry->d_name, &ifr)){
1266
return 0;
1267
}
1268
return 1;
1247
1269
}
1248
1270
1249
1271
int notdotentries(const struct dirent *direntry){
1260
1282
/* Is this directory entry a runnable program? */
1261
1283
int runnable_hook(const struct dirent *direntry){
1262
1284
int ret;
1263
size_t sret;
1264
1285
struct stat st;
1265
1286
1266
1287
if((direntry->d_name)[0] == '\0'){
1268
1289
return 0;
1269
1290
}
1270
1291
1271
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1272
"abcdefghijklmnopqrstuvwxyz"
1273
"0123456789"
1274
"_-");
1275
if((direntry->d_name)[sret] != '\0'){
1276
/* Contains non-allowed characters */
1277
if(debug){
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1279
direntry->d_name);
1280
}
1281
return 0;
1282
}
1292
/* Save pointer to last character */
1293
char *end = strchr(direntry->d_name, '\0')-1;
1294
1295
if(*end == '~'){
1296
/* Backup name~ */
1297
return 0;
1298
}
1299
1300
if(((direntry->d_name)[0] == '#')
1301
and (*end == '#')){
1302
/* Temporary #name# */
1303
return 0;
1304
}
1305
1306
/* XXX more rules here */
1283
1307
1284
1308
char *fullname = NULL;
1285
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1309
ret = asprintf(&fullname, "%s/%s", hookdir,
1310
direntry->d_name);
1286
1311
if(ret < 0){
1287
1312
perror_plus("asprintf");
1288
1313
return 0;
1291
1316
ret = stat(fullname, &st);
1292
1317
if(ret == -1){
1293
1318
if(debug){
1294
perror_plus("Could not stat hook");
1319
perror_plus("Could not stat plugin");
1295
1320
}
1296
1321
return 0;
1297
1322
}
1298
1323
if(not (S_ISREG(st.st_mode))){
1299
1324
/* Not a regular file */
1300
if(debug){
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1302
direntry->d_name);
1303
}
1304
1325
return 0;
1305
1326
}
1306
1327
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1307
1328
/* Not executable */
1308
if(debug){
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1310
direntry->d_name);
1311
}
1312
1329
return 0;
1313
1330
}
1314
if(debug){
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1316
direntry->d_name);
1317
}
1318
1331
return 1;
1319
1332
}
1320
1333
1327
1340
while(true){
1328
1341
if(mc.current_server == NULL){
1329
1342
if (debug){
1330
fprintf_plus(stderr, "Wait until first server is found."
1331
" No timeout!\n");
1343
fprintf(stderr, "Mandos plugin mandos-client: "
1344
"Wait until first server is found. No timeout!\n");
1332
1345
}
1333
1346
ret = avahi_simple_poll_iterate(s, -1);
1334
1347
} else {
1335
1348
if (debug){
1336
fprintf_plus(stderr, "Check current_server if we should run"
1337
" it, or wait\n");
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Check current_server if we should run it,"
1351
" or wait\n");
1338
1352
}
1339
1353
/* the current time */
1340
1354
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1356
1370
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1371
1358
1372
if (debug){
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
block_time);
1373
fprintf(stderr, "Mandos plugin mandos-client: "
1374
"Blocking for %" PRIdMAX " ms\n", block_time);
1361
1375
}
1362
1376
1363
1377
if(block_time <= 0){
1390
1404
}
1391
1405
}
1392
1406
1393
/* Set effective uid to 0, return errno */
1394
error_t raise_privileges(void){
1395
error_t old_errno = errno;
1396
error_t ret_errno = 0;
1397
if(seteuid(0) == -1){
1398
ret_errno = errno;
1399
perror_plus("seteuid");
1400
}
1401
errno = old_errno;
1402
return ret_errno;
1403
}
1404
1405
/* Set effective and real user ID to 0. Return errno. */
1406
error_t raise_privileges_permanently(void){
1407
error_t old_errno = errno;
1408
error_t ret_errno = raise_privileges();
1409
if(ret_errno != 0){
1410
errno = old_errno;
1411
return ret_errno;
1412
}
1413
if(setuid(0) == -1){
1414
ret_errno = errno;
1415
perror_plus("seteuid");
1416
}
1417
errno = old_errno;
1418
return ret_errno;
1419
}
1420
1421
/* Set effective user ID to unprivileged saved user ID */
1422
error_t lower_privileges(void){
1423
error_t old_errno = errno;
1424
error_t ret_errno = 0;
1425
if(seteuid(uid) == -1){
1426
ret_errno = errno;
1427
perror_plus("seteuid");
1428
}
1429
errno = old_errno;
1430
return ret_errno;
1431
}
1432
1433
/* Lower privileges permanently */
1434
error_t lower_privileges_permanently(void){
1435
error_t old_errno = errno;
1436
error_t ret_errno = 0;
1437
if(setuid(uid) == -1){
1438
ret_errno = errno;
1439
perror_plus("setuid");
1440
}
1441
errno = old_errno;
1442
return ret_errno;
1443
}
1444
1445
bool run_network_hooks(const char *mode, const char *interface,
1446
const float delay){
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1449
int ret;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
alphasort);
1452
if(numhooks == -1){
1453
perror_plus("scandir");
1454
} else {
1455
int devnull = open("/dev/null", O_RDONLY);
1456
for(int i = 0; i < numhooks; i++){
1457
direntry = direntries[i];
1458
char *fullname = NULL;
1459
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1460
if(ret < 0){
1461
perror_plus("asprintf");
1462
continue;
1463
}
1464
if(debug){
1465
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1466
direntry->d_name);
1467
}
1468
pid_t hook_pid = fork();
1469
if(hook_pid == 0){
1470
/* Child */
1471
/* Raise privileges */
1472
raise_privileges_permanently();
1473
/* Set group */
1474
errno = 0;
1475
ret = setgid(0);
1476
if(ret == -1){
1477
perror_plus("setgid");
1478
}
1479
/* Reset supplementary groups */
1480
errno = 0;
1481
ret = setgroups(0, NULL);
1482
if(ret == -1){
1483
perror_plus("setgroups");
1484
}
1485
dup2(devnull, STDIN_FILENO);
1486
close(devnull);
1487
dup2(STDERR_FILENO, STDOUT_FILENO);
1488
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1489
if(ret == -1){
1490
perror_plus("setenv");
1491
_exit(EX_OSERR);
1492
}
1493
ret = setenv("DEVICE", interface, 1);
1494
if(ret == -1){
1495
perror_plus("setenv");
1496
_exit(EX_OSERR);
1497
}
1498
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1499
if(ret == -1){
1500
perror_plus("setenv");
1501
_exit(EX_OSERR);
1502
}
1503
ret = setenv("MODE", mode, 1);
1504
if(ret == -1){
1505
perror_plus("setenv");
1506
_exit(EX_OSERR);
1507
}
1508
char *delaystring;
1509
ret = asprintf(&delaystring, "%f", delay);
1510
if(ret == -1){
1511
perror_plus("asprintf");
1512
_exit(EX_OSERR);
1513
}
1514
ret = setenv("DELAY", delaystring, 1);
1515
if(ret == -1){
1516
free(delaystring);
1517
perror_plus("setenv");
1518
_exit(EX_OSERR);
1519
}
1520
free(delaystring);
1521
if(connect_to != NULL){
1522
ret = setenv("CONNECT", connect_to, 1);
1523
if(ret == -1){
1524
perror_plus("setenv");
1525
_exit(EX_OSERR);
1526
}
1527
}
1528
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1529
perror_plus("execl");
1530
_exit(EXIT_FAILURE);
1531
}
1532
} else {
1533
int status;
1534
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1535
perror_plus("waitpid");
1536
free(fullname);
1537
continue;
1538
}
1539
if(WIFEXITED(status)){
1540
if(WEXITSTATUS(status) != 0){
1541
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1542
" with status %d\n", direntry->d_name,
1543
WEXITSTATUS(status));
1544
free(fullname);
1545
continue;
1546
}
1547
} else if(WIFSIGNALED(status)){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1549
" signal %d\n", direntry->d_name,
1550
WTERMSIG(status));
1551
free(fullname);
1552
continue;
1553
} else {
1554
fprintf_plus(stderr, "Warning: network hook \"%s\""
1555
" crashed\n", direntry->d_name);
1556
free(fullname);
1557
continue;
1558
}
1559
}
1560
free(fullname);
1561
if(debug){
1562
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1563
direntry->d_name);
1564
}
1565
}
1566
close(devnull);
1567
}
1568
return true;
1569
}
1570
1571
error_t bring_up_interface(const char *const interface,
1572
const float delay){
1573
int sd = -1;
1574
error_t old_errno = errno;
1575
error_t ret_errno = 0;
1576
int ret, ret_setflags;
1577
struct ifreq network;
1578
unsigned int if_index = if_nametoindex(interface);
1579
if(if_index == 0){
1580
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1581
errno = old_errno;
1582
return ENXIO;
1583
}
1584
1585
if(quit_now){
1586
errno = old_errno;
1587
return EINTR;
1588
}
1589
1590
if(not interface_is_up(interface)){
1591
if(not get_flags(interface, &network) and debug){
1592
ret_errno = errno;
1593
fprintf_plus(stderr, "Failed to get flags for interface "
1594
"\"%s\"\n", interface);
1595
return ret_errno;
1596
}
1597
network.ifr_flags |= IFF_UP;
1598
1599
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1600
if(sd < 0){
1601
ret_errno = errno;
1602
perror_plus("socket");
1603
errno = old_errno;
1604
return ret_errno;
1605
}
1606
1607
if(quit_now){
1608
close(sd);
1609
errno = old_errno;
1610
return EINTR;
1611
}
1612
1613
if(debug){
1614
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1615
interface);
1616
}
1617
1618
/* Raise priviliges */
1619
raise_privileges();
1620
1621
#ifdef __linux__
1622
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1623
messages about the network interface to mess up the prompt */
1624
int ret_linux = klogctl(8, NULL, 5);
1625
bool restore_loglevel = true;
1626
if(ret_linux == -1){
1627
restore_loglevel = false;
1628
perror_plus("klogctl");
1629
}
1630
#endif /* __linux__ */
1631
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1632
ret_errno = errno;
1633
#ifdef __linux__
1634
if(restore_loglevel){
1635
ret_linux = klogctl(7, NULL, 0);
1636
if(ret_linux == -1){
1637
perror_plus("klogctl");
1638
}
1639
}
1640
#endif /* __linux__ */
1641
1642
/* Lower privileges */
1643
lower_privileges();
1644
1645
/* Close the socket */
1646
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1647
if(ret == -1){
1648
perror_plus("close");
1649
}
1650
1651
if(ret_setflags == -1){
1652
errno = ret_errno;
1653
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1654
errno = old_errno;
1655
return ret_errno;
1656
}
1657
} else if(debug){
1658
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1659
interface);
1660
}
1661
1662
/* Sleep checking until interface is running.
1663
Check every 0.25s, up to total time of delay */
1664
for(int i=0; i < delay * 4; i++){
1665
if(interface_is_running(interface)){
1666
break;
1667
}
1668
struct timespec sleeptime = { .tv_nsec = 250000000 };
1669
ret = nanosleep(&sleeptime, NULL);
1670
if(ret == -1 and errno != EINTR){
1671
perror_plus("nanosleep");
1672
}
1673
}
1674
1675
errno = old_errno;
1676
return 0;
1677
}
1678
1679
error_t take_down_interface(const char *const interface){
1680
int sd = -1;
1681
error_t old_errno = errno;
1682
error_t ret_errno = 0;
1683
int ret, ret_setflags;
1684
struct ifreq network;
1685
unsigned int if_index = if_nametoindex(interface);
1686
if(if_index == 0){
1687
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1688
errno = old_errno;
1689
return ENXIO;
1690
}
1691
if(interface_is_up(interface)){
1692
if(not get_flags(interface, &network) and debug){
1693
ret_errno = errno;
1694
fprintf_plus(stderr, "Failed to get flags for interface "
1695
"\"%s\"\n", interface);
1696
return ret_errno;
1697
}
1698
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1699
1700
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1701
if(sd < 0){
1702
ret_errno = errno;
1703
perror_plus("socket");
1704
errno = old_errno;
1705
return ret_errno;
1706
}
1707
1708
if(debug){
1709
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1710
interface);
1711
}
1712
1713
/* Raise priviliges */
1714
raise_privileges();
1715
1716
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1717
ret_errno = errno;
1718
1719
/* Lower privileges */
1720
lower_privileges();
1721
1722
/* Close the socket */
1723
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1724
if(ret == -1){
1725
perror_plus("close");
1726
}
1727
1728
if(ret_setflags == -1){
1729
errno = ret_errno;
1730
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1731
errno = old_errno;
1732
return ret_errno;
1733
}
1734
} else if(debug){
1735
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1736
interface);
1737
}
1738
1739
errno = old_errno;
1740
return 0;
1741
}
1742
1743
1407
int main(int argc, char *argv[]){
1744
1408
AvahiSServiceBrowser *sb = NULL;
1745
error_t ret_errno;
1409
int error;
1746
1410
int ret;
1747
1411
intmax_t tmpmax;
1748
1412
char *tmp;
1749
1413
int exitcode = EXIT_SUCCESS;
1750
char *interfaces = NULL;
1751
size_t interfaces_size = 0;
1752
char *interfaces_to_take_down = NULL;
1753
size_t interfaces_to_take_down_size = 0;
1414
const char *interface = "";
1415
struct ifreq network;
1416
int sd = -1;
1417
bool take_down_interface = false;
1418
uid_t uid;
1419
gid_t gid;
1754
1420
char tempdir[] = "/tmp/mandosXXXXXX";
1755
1421
bool tempdir_created = false;
1756
1422
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1757
1423
const char *seckey = PATHDIR "/" SECKEY;
1758
1424
const char *pubkey = PATHDIR "/" PUBKEY;
1759
char *interfaces_hooks = NULL;
1760
size_t interfaces_hooks_size = 0;
1761
1425
1762
1426
bool gnutls_initialized = false;
1763
1427
bool gpgme_initialized = false;
1825
1489
.group = 2 },
1826
1490
{ .name = "retry", .key = 132,
1827
1491
.arg = "SECONDS",
1828
.doc = "Retry interval used when denied by the Mandos server",
1492
.doc = "Retry interval used when denied by the mandos server",
1829
1493
.group = 2 },
1830
1494
{ .name = "network-hook-dir", .key = 133,
1831
1495
.arg = "DIR",
1854
1518
connect_to = arg;
1855
1519
break;
1856
1520
case 'i': /* --interface */
1857
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1858
(int)',');
1859
if(ret_errno != 0){
1860
argp_error(state, "%s", strerror(ret_errno));
1861
}
1521
interface = arg;
1862
1522
break;
1863
1523
case 's': /* --seckey */
1864
1524
seckey = arg;
1907
1567
argp_state_help(state, state->out_stream,
1908
1568
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1909
1569
case 'V': /* --version */
1910
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1570
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1571
fprintf(state->out_stream, "%s\n", argp_program_version);
1911
1572
exit(argp_err_exit_status);
1912
1573
break;
1913
1574
default:
1940
1601
{
1941
1602
/* Work around Debian bug #633582:
1942
1603
<http://bugs.debian.org/633582> */
1604
struct stat st;
1943
1605
1944
1606
/* Re-raise priviliges */
1945
if(raise_privileges() == 0){
1946
struct stat st;
1947
1948
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1949
int seckey_fd = open(seckey, O_RDONLY);
1950
if(seckey_fd == -1){
1951
perror_plus("open");
1952
} else {
1953
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1954
if(ret == -1){
1955
perror_plus("fstat");
1956
} else {
1957
if(S_ISREG(st.st_mode)
1958
and st.st_uid == 0 and st.st_gid == 0){
1959
ret = fchown(seckey_fd, uid, gid);
1960
if(ret == -1){
1961
perror_plus("fchown");
1962
}
1963
}
1964
}
1965
TEMP_FAILURE_RETRY(close(seckey_fd));
1966
}
1967
}
1968
1969
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1970
int pubkey_fd = open(pubkey, O_RDONLY);
1971
if(pubkey_fd == -1){
1972
perror_plus("open");
1973
} else {
1974
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1975
if(ret == -1){
1976
perror_plus("fstat");
1977
} else {
1978
if(S_ISREG(st.st_mode)
1979
and st.st_uid == 0 and st.st_gid == 0){
1980
ret = fchown(pubkey_fd, uid, gid);
1981
if(ret == -1){
1982
perror_plus("fchown");
1983
}
1984
}
1985
}
1986
TEMP_FAILURE_RETRY(close(pubkey_fd));
1987
}
1988
}
1989
1990
/* Lower privileges */
1991
errno = 0;
1992
ret = seteuid(uid);
1993
if(ret == -1){
1994
perror_plus("seteuid");
1995
}
1996
}
1997
}
1998
1999
/* Remove empty interface names */
2000
{
2001
char *interface = NULL;
2002
while((interface = argz_next(interfaces, interfaces_size,
2003
interface))){
2004
if(if_nametoindex(interface) == 0){
2005
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2006
fprintf_plus(stderr, "Not using nonexisting interface"
2007
" \"%s\"\n", interface);
2008
}
2009
argz_delete(&interfaces, &interfaces_size, interface);
2010
interface = NULL;
2011
}
2012
}
2013
}
2014
2015
/* Run network hooks */
2016
{
2017
ret_errno = argz_append(&interfaces_hooks, &interfaces_hooks_size,
2018
interfaces, interfaces_size);
2019
if(ret_errno != 0){
2020
errno = ret_errno;
2021
perror_plus("argz_append");
2022
goto end;
2023
}
2024
argz_stringify(interfaces_hooks, interfaces_hooks_size, (int)',');
2025
if(not run_network_hooks("start", interfaces_hooks, delay)){
2026
goto end;
1607
errno = 0;
1608
ret = seteuid(0);
1609
if(ret == -1){
1610
perror_plus("seteuid");
1611
}
1612
1613
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1614
int seckey_fd = open(seckey, O_RDONLY);
1615
if(seckey_fd == -1){
1616
perror_plus("open");
1617
} else {
1618
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1619
if(ret == -1){
1620
perror_plus("fstat");
1621
} else {
1622
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1623
ret = fchown(seckey_fd, uid, gid);
1624
if(ret == -1){
1625
perror_plus("fchown");
1626
}
1627
}
1628
}
1629
TEMP_FAILURE_RETRY(close(seckey_fd));
1630
}
1631
}
1632
1633
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1634
int pubkey_fd = open(pubkey, O_RDONLY);
1635
if(pubkey_fd == -1){
1636
perror_plus("open");
1637
} else {
1638
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1639
if(ret == -1){
1640
perror_plus("fstat");
1641
} else {
1642
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1643
ret = fchown(pubkey_fd, uid, gid);
1644
if(ret == -1){
1645
perror_plus("fchown");
1646
}
1647
}
1648
}
1649
TEMP_FAILURE_RETRY(close(pubkey_fd));
1650
}
1651
}
1652
1653
/* Lower privileges */
1654
errno = 0;
1655
ret = seteuid(uid);
1656
if(ret == -1){
1657
perror_plus("seteuid");
1658
}
1659
}
1660
1661
/* Find network hooks and run them */
1662
{
1663
struct dirent **direntries;
1664
struct dirent *direntry;
1665
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1666
alphasort);
1667
if(numhooks == -1){
1668
perror_plus("scandir");
1669
} else {
1670
int devnull = open("/dev/null", O_RDONLY);
1671
for(int i = 0; i < numhooks; i++){
1672
direntry = direntries[0];
1673
char *fullname = NULL;
1674
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1675
if(ret < 0){
1676
perror_plus("asprintf");
1677
continue;
1678
}
1679
pid_t hook_pid = fork();
1680
if(hook_pid == 0){
1681
/* Child */
1682
dup2(devnull, STDIN_FILENO);
1683
close(devnull);
1684
dup2(STDERR_FILENO, STDOUT_FILENO);
1685
ret = setenv("DEVICE", interface, 1);
1686
if(ret == -1){
1687
perror_plus("setenv");
1688
exit(1);
1689
}
1690
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1691
if(ret == -1){
1692
perror_plus("setenv");
1693
exit(1);
1694
}
1695
ret = setenv("MODE", "start", 1);
1696
if(ret == -1){
1697
perror_plus("setenv");
1698
exit(1);
1699
}
1700
char *delaystring;
1701
ret = asprintf(&delaystring, "%f", delay);
1702
if(ret == -1){
1703
perror_plus("asprintf");
1704
exit(1);
1705
}
1706
ret = setenv("DELAY", delaystring, 1);
1707
if(ret == -1){
1708
free(delaystring);
1709
perror_plus("setenv");
1710
exit(1);
1711
}
1712
free(delaystring);
1713
ret = execl(fullname, direntry->d_name, "start", NULL);
1714
perror_plus("execl");
1715
} else {
1716
int status;
1717
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1718
perror_plus("waitpid");
1719
free(fullname);
1720
continue;
1721
}
1722
if(WIFEXITED(status)){
1723
if(WEXITSTATUS(status) != 0){
1724
fprintf(stderr, "Mandos plugin mandos-client: "
1725
"Warning: network hook \"%s\" exited"
1726
" with status %d\n", direntry->d_name,
1727
WEXITSTATUS(status));
1728
free(fullname);
1729
continue;
1730
}
1731
} else if(WIFSIGNALED(status)){
1732
fprintf(stderr, "Mandos plugin mandos-client: "
1733
"Warning: network hook \"%s\" died by"
1734
" signal %d\n", direntry->d_name,
1735
WTERMSIG(status));
1736
free(fullname);
1737
continue;
1738
} else {
1739
fprintf(stderr, "Mandos plugin mandos-client: "
1740
"Warning: network hook \"%s\" crashed\n",
1741
direntry->d_name);
1742
free(fullname);
1743
continue;
1744
}
1745
}
1746
free(fullname);
1747
if(quit_now){
1748
goto end;
1749
}
1750
}
1751
close(devnull);
2027
1752
}
2028
1753
}
2029
1754
2031
1756
avahi_set_log_function(empty_log);
2032
1757
}
2033
1758
1759
if(interface[0] == '\0'){
1760
struct dirent **direntries;
1761
/* First look for interfaces that are up */
1762
ret = scandir(sys_class_net, &direntries, up_interface,
1763
alphasort);
1764
if(ret == 0){
1765
/* No up interfaces, look for any good interfaces */
1766
free(direntries);
1767
ret = scandir(sys_class_net, &direntries, good_interface,
1768
alphasort);
1769
}
1770
if(ret >= 1){
1771
/* Pick the first interface returned */
1772
interface = strdup(direntries[0]->d_name);
1773
if(debug){
1774
fprintf(stderr, "Mandos plugin mandos-client: "
1775
"Using interface \"%s\"\n", interface);
1776
}
1777
if(interface == NULL){
1778
perror_plus("malloc");
1779
free(direntries);
1780
exitcode = EXIT_FAILURE;
1781
goto end;
1782
}
1783
free(direntries);
1784
} else {
1785
free(direntries);
1786
fprintf(stderr, "Mandos plugin mandos-client: "
1787
"Could not find a network interface\n");
1788
exitcode = EXIT_FAILURE;
1789
goto end;
1790
}
1791
}
1792
2034
1793
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2035
1794
from the signal handler */
2036
1795
/* Initialize the pseudo-RNG for Avahi */
2037
1796
srand((unsigned int) time(NULL));
2038
1797
mc.simple_poll = avahi_simple_poll_new();
2039
1798
if(mc.simple_poll == NULL){
2040
fprintf_plus(stderr,
2041
"Avahi: Failed to create simple poll object.\n");
1799
fprintf(stderr, "Mandos plugin mandos-client: "
1800
"Avahi: Failed to create simple poll object.\n");
2042
1801
exitcode = EX_UNAVAILABLE;
2043
1802
goto end;
2044
1803
}
2106
1865
}
2107
1866
}
2108
1867
2109
/* If no interfaces were specified, make a list */
2110
if(interfaces == NULL){
2111
struct dirent **direntries;
2112
/* Look for any good interfaces */
2113
ret = scandir(sys_class_net, &direntries, good_interface,
2114
alphasort);
2115
if(ret >= 1){
2116
/* Add all found interfaces to interfaces list */
2117
for(int i = 0; i < ret; ++i){
2118
ret_errno = argz_add(&interfaces, &interfaces_size,
2119
direntries[i]->d_name);
2120
if(ret_errno != 0){
2121
perror_plus("argz_add");
2122
continue;
2123
}
2124
if(debug){
2125
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2126
direntries[i]->d_name);
2127
}
2128
}
2129
free(direntries);
1868
/* If the interface is down, bring it up */
1869
if(strcmp(interface, "none") != 0){
1870
if_index = (AvahiIfIndex) if_nametoindex(interface);
1871
if(if_index == 0){
1872
fprintf(stderr, "Mandos plugin mandos-client: "
1873
"No such interface: \"%s\"\n", interface);
1874
exitcode = EX_UNAVAILABLE;
1875
goto end;
1876
}
1877
1878
if(quit_now){
1879
goto end;
1880
}
1881
1882
/* Re-raise priviliges */
1883
errno = 0;
1884
ret = seteuid(0);
1885
if(ret == -1){
1886
perror_plus("seteuid");
1887
}
1888
1889
#ifdef __linux__
1890
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1891
messages about the network interface to mess up the prompt */
1892
ret = klogctl(8, NULL, 5);
1893
bool restore_loglevel = true;
1894
if(ret == -1){
1895
restore_loglevel = false;
1896
perror_plus("klogctl");
1897
}
1898
#endif /* __linux__ */
1899
1900
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1901
if(sd < 0){
1902
perror_plus("socket");
1903
exitcode = EX_OSERR;
1904
#ifdef __linux__
1905
if(restore_loglevel){
1906
ret = klogctl(7, NULL, 0);
1907
if(ret == -1){
1908
perror_plus("klogctl");
1909
}
1910
}
1911
#endif /* __linux__ */
1912
/* Lower privileges */
1913
errno = 0;
1914
ret = seteuid(uid);
1915
if(ret == -1){
1916
perror_plus("seteuid");
1917
}
1918
goto end;
1919
}
1920
strcpy(network.ifr_name, interface);
1921
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1922
if(ret == -1){
1923
perror_plus("ioctl SIOCGIFFLAGS");
1924
#ifdef __linux__
1925
if(restore_loglevel){
1926
ret = klogctl(7, NULL, 0);
1927
if(ret == -1){
1928
perror_plus("klogctl");
1929
}
1930
}
1931
#endif /* __linux__ */
1932
exitcode = EX_OSERR;
1933
/* Lower privileges */
1934
errno = 0;
1935
ret = seteuid(uid);
1936
if(ret == -1){
1937
perror_plus("seteuid");
1938
}
1939
goto end;
1940
}
1941
if((network.ifr_flags & IFF_UP) == 0){
1942
network.ifr_flags |= IFF_UP;
1943
take_down_interface = true;
1944
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1945
if(ret == -1){
1946
take_down_interface = false;
1947
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1948
exitcode = EX_OSERR;
1949
#ifdef __linux__
1950
if(restore_loglevel){
1951
ret = klogctl(7, NULL, 0);
1952
if(ret == -1){
1953
perror_plus("klogctl");
1954
}
1955
}
1956
#endif /* __linux__ */
1957
/* Lower privileges */
1958
errno = 0;
1959
ret = seteuid(uid);
1960
if(ret == -1){
1961
perror_plus("seteuid");
1962
}
1963
goto end;
1964
}
1965
}
1966
/* Sleep checking until interface is running.
1967
Check every 0.25s, up to total time of delay */
1968
for(int i=0; i < delay * 4; i++){
1969
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1970
if(ret == -1){
1971
perror_plus("ioctl SIOCGIFFLAGS");
1972
} else if(network.ifr_flags & IFF_RUNNING){
1973
break;
1974
}
1975
struct timespec sleeptime = { .tv_nsec = 250000000 };
1976
ret = nanosleep(&sleeptime, NULL);
1977
if(ret == -1 and errno != EINTR){
1978
perror_plus("nanosleep");
1979
}
1980
}
1981
if(not take_down_interface){
1982
/* We won't need the socket anymore */
1983
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1984
if(ret == -1){
1985
perror_plus("close");
1986
}
1987
}
1988
#ifdef __linux__
1989
if(restore_loglevel){
1990
/* Restores kernel loglevel to default */
1991
ret = klogctl(7, NULL, 0);
1992
if(ret == -1){
1993
perror_plus("klogctl");
1994
}
1995
}
1996
#endif /* __linux__ */
1997
/* Lower privileges */
1998
errno = 0;
1999
if(take_down_interface){
2000
/* Lower privileges */
2001
ret = seteuid(uid);
2002
if(ret == -1){
2003
perror_plus("seteuid");
2004
}
2130
2005
} else {
2131
free(direntries);
2132
fprintf_plus(stderr, "Could not find a network interface\n");
2133
exitcode = EXIT_FAILURE;
2134
goto end;
2135
}
2136
}
2137
2138
/* If we only got one interface, explicitly use only that one */
2139
if(argz_count(interfaces, interfaces_size) == 1){
2140
if(debug){
2141
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2142
interfaces);
2143
}
2144
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2145
}
2146
2147
/* Bring up interfaces which are down */
2148
if(not (argz_count(interfaces, interfaces_size) == 1
2149
and strcmp(interfaces, "none") == 0)){
2150
char *interface = NULL;
2151
while((interface = argz_next(interfaces, interfaces_size,
2152
interface))){
2153
bool interface_was_up = interface_is_up(interface);
2154
ret = bring_up_interface(interface, delay);
2155
if(not interface_was_up){
2156
if(ret != 0){
2157
errno = ret;
2158
perror_plus("Failed to bring up interface");
2159
} else {
2160
ret_errno = argz_add(&interfaces_to_take_down,
2161
&interfaces_to_take_down_size,
2162
interface);
2163
}
2006
/* Lower privileges permanently */
2007
ret = setuid(uid);
2008
if(ret == -1){
2009
perror_plus("setuid");
2164
2010
}
2165
2011
}
2166
free(interfaces);
2167
interfaces = NULL;
2168
interfaces_size = 0;
2169
if(debug and (interfaces_to_take_down == NULL)){
2170
fprintf_plus(stderr, "No interfaces were brought up\n");
2171
}
2172
2012
}
2173
2013
2174
2014
if(quit_now){
2177
2017
2178
2018
ret = init_gnutls_global(pubkey, seckey);
2179
2019
if(ret == -1){
2180
fprintf_plus(stderr, "init_gnutls_global failed\n");
2020
fprintf(stderr, "Mandos plugin mandos-client: "
2021
"init_gnutls_global failed\n");
2181
2022
exitcode = EX_UNAVAILABLE;
2182
2023
goto end;
2183
2024
} else {
2199
2040
}
2200
2041
2201
2042
if(not init_gpgme(pubkey, seckey, tempdir)){
2202
fprintf_plus(stderr, "init_gpgme failed\n");
2043
fprintf(stderr, "Mandos plugin mandos-client: "
2044
"init_gpgme failed\n");
2203
2045
exitcode = EX_UNAVAILABLE;
2204
2046
goto end;
2205
2047
} else {
2214
2056
/* Connect directly, do not use Zeroconf */
2215
2057
/* (Mainly meant for debugging) */
2216
2058
char *address = strrchr(connect_to, ':');
2217
2218
2059
if(address == NULL){
2219
fprintf_plus(stderr, "No colon in address\n");
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"No colon in address\n");
2220
2062
exitcode = EX_USAGE;
2221
2063
goto end;
2222
2064
}
2230
2072
tmpmax = strtoimax(address+1, &tmp, 10);
2231
2073
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2232
2074
or tmpmax != (uint16_t)tmpmax){
2233
fprintf_plus(stderr, "Bad port number\n");
2075
fprintf(stderr, "Mandos plugin mandos-client: "
2076
"Bad port number\n");
2234
2077
exitcode = EX_USAGE;
2235
2078
goto end;
2236
2079
}
2266
2109
break;
2267
2110
}
2268
2111
if(debug){
2269
fprintf_plus(stderr, "Retrying in %d seconds\n",
2270
(int)retry_interval);
2112
fprintf(stderr, "Mandos plugin mandos-client: "
2113
"Retrying in %d seconds\n", (int)retry_interval);
2271
2114
}
2272
2115
sleep((int)retry_interval);
2273
2116
}
2295
2138
/* Allocate a new server */
2296
2139
mc.server = avahi_server_new(avahi_simple_poll_get
2297
2140
(mc.simple_poll), &config, NULL,
2298
NULL, &ret_errno);
2141
NULL, &error);
2299
2142
2300
2143
/* Free the Avahi configuration data */
2301
2144
avahi_server_config_free(&config);
2303
2146
2304
2147
/* Check if creating the Avahi server object succeeded */
2305
2148
if(mc.server == NULL){
2306
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2307
avahi_strerror(ret_errno));
2149
fprintf(stderr, "Mandos plugin mandos-client: "
2150
"Failed to create Avahi server: %s\n",
2151
avahi_strerror(error));
2308
2152
exitcode = EX_UNAVAILABLE;
2309
2153
goto end;
2310
2154
}
2318
2162
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2319
2163
NULL, 0, browse_callback, NULL);
2320
2164
if(sb == NULL){
2321
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2322
avahi_strerror(avahi_server_errno(mc.server)));
2165
fprintf(stderr, "Mandos plugin mandos-client: "
2166
"Failed to create service browser: %s\n",
2167
avahi_strerror(avahi_server_errno(mc.server)));
2323
2168
exitcode = EX_UNAVAILABLE;
2324
2169
goto end;
2325
2170
}
2331
2176
/* Run the main loop */
2332
2177
2333
2178
if(debug){
2334
fprintf_plus(stderr, "Starting Avahi loop search\n");
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"Starting Avahi loop search\n");
2335
2181
}
2336
2182
2337
2183
ret = avahi_loop_with_timeout(mc.simple_poll,
2338
2184
(int)(retry_interval * 1000));
2339
2185
if(debug){
2340
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2341
(ret == 0) ? "successfully" : "with error");
2186
fprintf(stderr, "Mandos plugin mandos-client: "
2187
"avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2342
2189
}
2343
2190
2344
2191
end:
2345
2192
2346
2193
if(debug){
2347
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2194
fprintf(stderr, "Mandos plugin mandos-client: "
2195
"%s exiting\n", argv[0]);
2348
2196
}
2349
2197
2350
2198
/* Cleanup things */
2366
2214
if(gpgme_initialized){
2367
2215
gpgme_release(mc.ctx);
2368
2216
}
2369
2217
2370
2218
/* Cleans up the circular linked list of Mandos servers the client
2371
2219
has seen */
2372
2220
if(mc.current_server != NULL){
2378
2226
}
2379
2227
}
2380
2228
2381
/* Re-raise priviliges */
2382
{
2383
raise_privileges();
2384
2385
/* Run network hooks */
2386
run_network_hooks("stop", interfaces_hooks, delay);
2387
2388
/* Take down the network interfaces which were brought up */
2389
{
2390
char *interface = NULL;
2391
while((interface=argz_next(interfaces_to_take_down,
2392
interfaces_to_take_down_size,
2393
interface))){
2394
ret_errno = take_down_interface(interface);
2395
if(ret_errno != 0){
2396
errno = ret_errno;
2397
perror_plus("Failed to take down interface");
2229
/* XXX run network hooks "stop" here */
2230
2231
/* Take down the network interface */
2232
if(take_down_interface){
2233
/* Re-raise priviliges */
2234
errno = 0;
2235
ret = seteuid(0);
2236
if(ret == -1){
2237
perror_plus("seteuid");
2238
}
2239
if(geteuid() == 0){
2240
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2241
if(ret == -1){
2242
perror_plus("ioctl SIOCGIFFLAGS");
2243
} else if(network.ifr_flags & IFF_UP){
2244
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2245
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2246
if(ret == -1){
2247
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2398
2248
}
2399
2249
}
2400
if(debug and (interfaces_to_take_down == NULL)){
2401
fprintf_plus(stderr, "No interfaces needed to be taken"
2402
" down\n");
2250
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2251
if(ret == -1){
2252
perror_plus("close");
2253
}
2254
/* Lower privileges permanently */
2255
errno = 0;
2256
ret = setuid(uid);
2257
if(ret == -1){
2258
perror_plus("setuid");
2403
2259
}
2404
2260
}
2405
2406
lower_privileges_permanently();
2407
2261
}
2408
2262
2409
free(interfaces_to_take_down);
2410
free(interfaces_hooks);
2411
2412
2263
/* Removes the GPGME temp directory and all files inside */
2413
2264
if(tempdir_created){
2414
2265
struct dirent **direntries = NULL;
2427
2278
}
2428
2279
ret = remove(fullname);
2429
2280
if(ret == -1){
2430
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2431
strerror(errno));
2281
fprintf(stderr, "Mandos plugin mandos-client: "
2282
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2432
2283
}
2433
2284
free(fullname);
2434
2285
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0