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- Committer: Teddy Hogeborn
- Date: 2011-11-14 20:11:42 UTC
- mto: (505.2.7 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111114201142-17zxc14jvonogwfx
* plugins.d/mandos-client.c (run_network_hooks): New.
(main): Run run_network_hooks() with "stop" and "start" at
appropriate places. Don't lower privileges permanently
prematurely.
(main): Run run_network_hooks() with "stop" and "start" at
appropriate places. Don't lower privileges permanently
prematurely.
- 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() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <assert.h> /* assert() */
64
65
#include <errno.h> /* perror(), errno,
65
66
program_invocation_short_name */
66
67
#include <time.h> /* nanosleep(), time(), sleep() */
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
setgid(), pause() */
76
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
86
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
89
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
94
90
95
91
#ifdef __linux__
96
92
#include <sys/klog.h> /* klogctl() */
138
134
static const char sys_class_net[] = "/sys/class/net";
139
135
char *connect_to = NULL;
140
136
const char *hookdir = HOOKDIR;
141
uid_t uid = 65534;
142
gid_t gid = 65534;
143
137
144
138
/* Doubly linked list that need to be circularly linked when used */
145
139
typedef struct server{
146
140
const char *ip;
147
in_port_t port;
141
uint16_t port;
148
142
AvahiIfIndex if_index;
149
143
int af;
150
144
struct timespec last_seen;
175
169
176
170
/* Function to use when printing errors */
177
171
void perror_plus(const char *print_text){
178
int e = errno;
179
172
fprintf(stderr, "Mandos plugin %s: ",
180
173
program_invocation_short_name);
181
errno = e;
182
174
perror(print_text);
183
175
}
184
176
185
__attribute__((format (gnu_printf, 2, 3)))
186
int fprintf_plus(FILE *stream, const char *format, ...){
187
va_list ap;
188
va_start (ap, format);
189
190
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
191
program_invocation_short_name));
192
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
}
194
195
177
/*
196
178
* Make additional room in "buffer" for at least BUFFER_SIZE more
197
179
* bytes. "buffer_capacity" is how much is currently allocated,
210
192
}
211
193
212
194
/* Add server to set of servers to retry periodically */
213
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
214
int af){
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
215
197
int ret;
216
198
server *new_server = malloc(sizeof(server));
217
199
if(new_server == NULL){
218
200
perror_plus("malloc");
219
return false;
201
return -1;
220
202
}
221
203
*new_server = (server){ .ip = strdup(ip),
222
204
.port = port,
224
206
.af = af };
225
207
if(new_server->ip == NULL){
226
208
perror_plus("strdup");
227
return false;
209
return -1;
228
210
}
229
211
/* Special case of first server */
230
212
if (mc.current_server == NULL){
241
223
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
242
224
if(ret == -1){
243
225
perror_plus("clock_gettime");
244
return false;
226
return -1;
245
227
}
246
return true;
228
return 0;
247
229
}
248
230
249
231
/*
271
253
272
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
273
255
if(rc != GPG_ERR_NO_ERROR){
274
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
275
gpgme_strsource(rc), gpgme_strerror(rc));
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
276
259
return false;
277
260
}
278
261
279
262
rc = gpgme_op_import(mc.ctx, pgp_data);
280
263
if(rc != GPG_ERR_NO_ERROR){
281
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
282
gpgme_strsource(rc), gpgme_strerror(rc));
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
283
267
return false;
284
268
}
285
269
292
276
}
293
277
294
278
if(debug){
295
fprintf_plus(stderr, "Initializing GPGME\n");
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
296
281
}
297
282
298
283
/* Init GPGME */
299
284
gpgme_check_version(NULL);
300
285
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
301
286
if(rc != GPG_ERR_NO_ERROR){
302
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
304
290
return false;
305
291
}
306
292
307
293
/* Set GPGME home directory for the OpenPGP engine only */
308
294
rc = gpgme_get_engine_info(&engine_info);
309
295
if(rc != GPG_ERR_NO_ERROR){
310
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
312
299
return false;
313
300
}
314
301
while(engine_info != NULL){
320
307
engine_info = engine_info->next;
321
308
}
322
309
if(engine_info == NULL){
323
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
324
tempdir);
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
325
312
return false;
326
313
}
327
314
328
315
/* Create new GPGME "context" */
329
316
rc = gpgme_new(&(mc.ctx));
330
317
if(rc != GPG_ERR_NO_ERROR){
331
fprintf_plus(stderr, "Mandos plugin mandos-client: "
332
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
333
gpgme_strerror(rc));
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
334
321
return false;
335
322
}
336
323
355
342
ssize_t plaintext_length = 0;
356
343
357
344
if(debug){
358
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
359
347
}
360
348
361
349
/* Create new GPGME data buffer from memory cryptotext */
362
350
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
363
351
0);
364
352
if(rc != GPG_ERR_NO_ERROR){
365
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
367
356
return -1;
368
357
}
369
358
370
359
/* Create new empty GPGME data buffer for the plaintext */
371
360
rc = gpgme_data_new(&dh_plain);
372
361
if(rc != GPG_ERR_NO_ERROR){
373
fprintf_plus(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_data_new: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
376
365
gpgme_data_release(dh_crypto);
377
366
return -1;
378
367
}
381
370
data buffer */
382
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
383
372
if(rc != GPG_ERR_NO_ERROR){
384
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
385
gpgme_strsource(rc), gpgme_strerror(rc));
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
386
376
plaintext_length = -1;
387
377
if(debug){
388
378
gpgme_decrypt_result_t result;
389
379
result = gpgme_op_decrypt_result(mc.ctx);
390
380
if(result == NULL){
391
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
392
383
} else {
393
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
394
result->unsupported_algorithm);
395
fprintf_plus(stderr, "Wrong key usage: %u\n",
396
result->wrong_key_usage);
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
397
390
if(result->file_name != NULL){
398
fprintf_plus(stderr, "File name: %s\n", result->file_name);
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
399
393
}
400
394
gpgme_recipient_t recipient;
401
395
recipient = result->recipients;
402
396
while(recipient != NULL){
403
fprintf_plus(stderr, "Public key algorithm: %s\n",
404
gpgme_pubkey_algo_name
405
(recipient->pubkey_algo));
406
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
407
fprintf_plus(stderr, "Secret key available: %s\n",
408
recipient->status == GPG_ERR_NO_SECKEY
409
? "No" : "Yes");
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
410
406
recipient = recipient->next;
411
407
}
412
408
}
415
411
}
416
412
417
413
if(debug){
418
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
419
416
}
420
417
421
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
452
449
}
453
450
454
451
if(debug){
455
fprintf_plus(stderr, "Decrypted password is: ");
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
456
454
for(ssize_t i = 0; i < plaintext_length; i++){
457
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
458
456
}
470
468
}
471
469
472
470
static const char * safer_gnutls_strerror(int value){
473
const char *ret = gnutls_strerror(value);
471
const char *ret = gnutls_strerror(value); /* Spurious warning from
472
-Wunreachable-code */
474
473
if(ret == NULL)
475
474
ret = "(unknown)";
476
475
return ret;
479
478
/* GnuTLS log function callback */
480
479
static void debuggnutls(__attribute__((unused)) int level,
481
480
const char* string){
482
fprintf_plus(stderr, "GnuTLS: %s", string);
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
483
482
}
484
483
485
484
static int init_gnutls_global(const char *pubkeyfilename,
487
486
int ret;
488
487
489
488
if(debug){
490
fprintf_plus(stderr, "Initializing GnuTLS\n");
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
491
491
}
492
492
493
493
ret = gnutls_global_init();
494
494
if(ret != GNUTLS_E_SUCCESS){
495
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
496
safer_gnutls_strerror(ret));
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
497
497
return -1;
498
498
}
499
499
508
508
/* OpenPGP credentials */
509
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
510
if(ret != GNUTLS_E_SUCCESS){
511
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
512
safer_gnutls_strerror(ret));
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
513
513
gnutls_global_deinit();
514
514
return -1;
515
515
}
516
516
517
517
if(debug){
518
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
519
" secret key %s as GnuTLS credentials\n",
520
pubkeyfilename,
521
seckeyfilename);
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
522
522
}
523
523
524
524
ret = gnutls_certificate_set_openpgp_key_file
525
525
(mc.cred, pubkeyfilename, seckeyfilename,
526
526
GNUTLS_OPENPGP_FMT_BASE64);
527
527
if(ret != GNUTLS_E_SUCCESS){
528
fprintf_plus(stderr,
529
"Error[%d] while reading the OpenPGP key pair ('%s',"
530
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
531
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
532
safer_gnutls_strerror(ret));
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
533
534
goto globalfail;
534
535
}
535
536
536
537
/* GnuTLS server initialization */
537
538
ret = gnutls_dh_params_init(&mc.dh_params);
538
539
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
540
" initialization: %s\n",
541
safer_gnutls_strerror(ret));
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
542
543
goto globalfail;
543
544
}
544
545
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
545
546
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
safer_gnutls_strerror(ret));
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
548
550
goto globalfail;
549
551
}
550
552
570
572
}
571
573
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
572
574
if(ret != GNUTLS_E_SUCCESS){
573
fprintf_plus(stderr,
574
"Error in GnuTLS session initialization: %s\n",
575
safer_gnutls_strerror(ret));
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
576
578
}
577
579
578
580
{
585
587
}
586
588
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
587
589
if(ret != GNUTLS_E_SUCCESS){
588
fprintf_plus(stderr, "Syntax error at: %s\n", err);
589
fprintf_plus(stderr, "GnuTLS error: %s\n",
590
safer_gnutls_strerror(ret));
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
591
594
gnutls_deinit(*session);
592
595
return -1;
593
596
}
602
605
}
603
606
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
604
607
if(ret != GNUTLS_E_SUCCESS){
605
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
606
safer_gnutls_strerror(ret));
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
607
611
gnutls_deinit(*session);
608
612
return -1;
609
613
}
621
625
__attribute__((unused)) const char *txt){}
622
626
623
627
/* Called when a Mandos server is found */
624
static int start_mandos_communication(const char *ip, in_port_t port,
628
static int start_mandos_communication(const char *ip, uint16_t port,
625
629
AvahiIfIndex if_index,
626
630
int af){
627
631
int ret, tcp_sd = -1;
654
658
pf = PF_INET;
655
659
break;
656
660
default:
657
fprintf_plus(stderr, "Bad address family: %d\n", af);
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
658
663
errno = EINVAL;
659
664
return -1;
660
665
}
665
670
}
666
671
667
672
if(debug){
668
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
669
PRIuMAX "\n", ip, (uintmax_t)port);
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
670
676
}
671
677
672
678
tcp_sd = socket(pf, SOCK_STREAM, 0);
698
704
}
699
705
if(ret == 0){
700
706
int e = errno;
701
fprintf_plus(stderr, "Bad address: %s\n", ip);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
702
709
errno = e;
703
710
goto mandos_end;
704
711
}
705
712
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
713
to.in6.sin6_port = htons(port); /* Spurious warnings from
714
-Wconversion and
715
-Wunreachable-code */
716
707
717
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
719
-Wunreachable-code*/
710
720
if(if_index == AVAHI_IF_UNSPEC){
711
fprintf_plus(stderr, "An IPv6 link-local address is"
712
" incomplete without a network interface\n");
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
713
724
errno = EINVAL;
714
725
goto mandos_end;
715
726
}
733
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
734
745
perror_plus("if_indextoname");
735
746
} else {
736
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
737
"\n", ip, interface, (uintmax_t)port);
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
738
750
}
739
751
} else {
740
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
741
ip, (uintmax_t)port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
742
754
}
743
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
754
766
perror_plus("inet_ntop");
755
767
} else {
756
768
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
758
771
}
759
772
}
760
773
}
814
827
}
815
828
816
829
if(debug){
817
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
818
832
}
819
833
820
834
if(quit_now){
822
836
goto mandos_end;
823
837
}
824
838
825
/* This casting via intptr_t is to eliminate warning about casting
826
an int to a pointer type. This is exactly how the GnuTLS Guile
827
function "set-session-transport-fd!" does it. */
828
gnutls_transport_set_ptr(session,
829
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
839
/* Spurious warning from -Wint-to-pointer-cast */
840
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
830
841
831
842
if(quit_now){
832
843
errno = EINTR;
843
854
844
855
if(ret != GNUTLS_E_SUCCESS){
845
856
if(debug){
846
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
847
859
gnutls_perror(ret);
848
860
}
849
861
errno = EPROTO;
853
865
/* Read OpenPGP packet that contains the wanted password */
854
866
855
867
if(debug){
856
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
857
" %s\n", ip);
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
858
870
}
859
871
860
872
while(true){
898
910
}
899
911
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
900
912
if(ret < 0){
901
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
902
"***\n");
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
903
915
gnutls_perror(ret);
904
916
errno = EPROTO;
905
917
goto mandos_end;
906
918
}
907
919
break;
908
920
default:
909
fprintf_plus(stderr, "Unknown error while reading data from"
910
" encrypted session with Mandos server\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
911
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
912
925
errno = EIO;
913
926
goto mandos_end;
918
931
}
919
932
920
933
if(debug){
921
fprintf_plus(stderr, "Closing TLS session\n");
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
922
936
}
923
937
924
938
if(quit_now){
953
967
if(ret == 0 and ferror(stdout)){
954
968
int e = errno;
955
969
if(debug){
956
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
957
strerror(errno));
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
972
strerror(errno));
958
973
}
959
974
errno = e;
960
975
goto mandos_end;
1005
1020
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1021
flags,
1007
1022
AVAHI_GCC_UNUSED void* userdata){
1008
if(r == NULL){
1009
return;
1010
}
1023
assert(r);
1011
1024
1012
1025
/* Called whenever a service has been resolved successfully or
1013
1026
timed out */
1019
1032
switch(event){
1020
1033
default:
1021
1034
case AVAHI_RESOLVER_FAILURE:
1022
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
domain,
1025
avahi_strerror(avahi_server_errno(mc.server)));
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
1037
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
avahi_strerror(avahi_server_errno(mc.server)));
1026
1039
break;
1027
1040
1028
1041
case AVAHI_RESOLVER_FOUND:
1030
1043
char ip[AVAHI_ADDRESS_STR_MAX];
1031
1044
avahi_address_snprint(ip, sizeof(ip), address);
1032
1045
if(debug){
1033
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1034
PRIdMAX ") on port %" PRIu16 "\n", name,
1035
host_name, ip, (intmax_t)interface, port);
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1048
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
ip, (intmax_t)interface, port);
1036
1050
}
1037
int ret = start_mandos_communication(ip, (in_port_t)port,
1038
interface,
1051
int ret = start_mandos_communication(ip, port, interface,
1039
1052
avahi_proto_to_af(proto));
1040
1053
if(ret == 0){
1041
1054
avahi_simple_poll_quit(mc.simple_poll);
1042
1055
} else {
1043
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto))){
1045
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1046
" list\n", name);
1047
}
1056
ret = add_server(ip, port, interface,
1057
avahi_proto_to_af(proto));
1048
1058
}
1049
1059
}
1050
1060
}
1061
1071
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1072
flags,
1063
1073
AVAHI_GCC_UNUSED void* userdata){
1064
if(b == NULL){
1065
return;
1066
}
1074
assert(b);
1067
1075
1068
1076
/* Called whenever a new services becomes available on the LAN or
1069
1077
is removed from the LAN */
1076
1084
default:
1077
1085
case AVAHI_BROWSER_FAILURE:
1078
1086
1079
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1089
avahi_strerror(avahi_server_errno(mc.server)));
1081
1090
avahi_simple_poll_quit(mc.simple_poll);
1082
1091
return;
1083
1092
1090
1099
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
1100
name, type, domain, protocol, 0,
1092
1101
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)));
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1104
name, avahi_strerror(avahi_server_errno(mc.server)));
1096
1105
break;
1097
1106
1098
1107
case AVAHI_BROWSER_REMOVE:
1101
1110
case AVAHI_BROWSER_ALL_FOR_NOW:
1102
1111
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1103
1112
if(debug){
1104
fprintf_plus(stderr, "No Mandos server found, still"
1105
" searching...\n");
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1106
1115
}
1107
1116
break;
1108
1117
}
1125
1134
1126
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1136
int ret;
1128
error_t ret_errno;
1129
1137
1130
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1131
1139
if(s < 0){
1132
ret_errno = errno;
1133
1140
perror_plus("socket");
1134
errno = ret_errno;
1135
1141
return false;
1136
1142
}
1137
1143
strcpy(ifr->ifr_name, ifname);
1138
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1139
1145
if(ret == -1){
1140
1146
if(debug){
1141
ret_errno = errno;
1142
1147
perror_plus("ioctl SIOCGIFFLAGS");
1143
errno = ret_errno;
1144
1148
}
1145
1149
return false;
1146
1150
}
1152
1156
/* Reject the loopback device */
1153
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
1158
if(debug){
1155
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1156
ifname);
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1157
1161
}
1158
1162
return false;
1159
1163
}
1160
1164
/* Accept point-to-point devices only if connect_to is specified */
1161
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
1166
if(debug){
1163
fprintf_plus(stderr, "Accepting point-to-point interface"
1164
" \"%s\"\n", ifname);
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1165
1169
}
1166
1170
return true;
1167
1171
}
1168
1172
/* Otherwise, reject non-broadcast-capable devices */
1169
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
1174
if(debug){
1171
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1172
" \"%s\"\n", ifname);
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1173
1177
}
1174
1178
return false;
1175
1179
}
1176
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
1181
if(ifr->ifr_flags & IFF_NOARP){
1178
1182
if(debug){
1179
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
ifname);
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1181
1185
}
1182
1186
return false;
1183
1187
}
1184
1188
1185
1189
/* Accept this device */
1186
1190
if(debug){
1187
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1188
1193
}
1189
1194
return true;
1190
1195
}
1202
1207
struct ifreq ifr;
1203
1208
if(not get_flags(if_entry->d_name, &ifr)){
1204
1209
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);
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1227
*/
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1230
return 0;
1231
}
1232
1233
struct ifreq ifr;
1234
if(not get_flags(if_entry->d_name, &ifr)){
1235
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1239
}
1240
return 0;
1241
}
1242
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1245
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1259
}
1260
return 0;
1261
}
1262
1263
if(not good_flags(if_entry->d_name, &ifr)){
1264
return 0;
1265
}
1266
return 1;
1247
1267
}
1248
1268
1249
1269
int notdotentries(const struct dirent *direntry){
1275
1295
if((direntry->d_name)[sret] != '\0'){
1276
1296
/* Contains non-allowed characters */
1277
1297
if(debug){
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1279
direntry->d_name);
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1280
1301
}
1281
1302
return 0;
1282
1303
}
1298
1319
if(not (S_ISREG(st.st_mode))){
1299
1320
/* Not a regular file */
1300
1321
if(debug){
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1302
direntry->d_name);
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1303
1325
}
1304
1326
return 0;
1305
1327
}
1306
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1307
1329
/* Not executable */
1308
1330
if(debug){
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1310
direntry->d_name);
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1311
1334
}
1312
1335
return 0;
1313
1336
}
1314
if(debug){
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1316
direntry->d_name);
1317
}
1318
1337
return 1;
1319
1338
}
1320
1339
1327
1346
while(true){
1328
1347
if(mc.current_server == NULL){
1329
1348
if (debug){
1330
fprintf_plus(stderr, "Wait until first server is found."
1331
" No timeout!\n");
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1332
1351
}
1333
1352
ret = avahi_simple_poll_iterate(s, -1);
1334
1353
} else {
1335
1354
if (debug){
1336
fprintf_plus(stderr, "Check current_server if we should run"
1337
" it, or wait\n");
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1338
1358
}
1339
1359
/* the current time */
1340
1360
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1356
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1377
1358
1378
if (debug){
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
block_time);
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1361
1381
}
1362
1382
1363
1383
if(block_time <= 0){
1390
1410
}
1391
1411
}
1392
1412
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
1413
bool run_network_hooks(const char *mode, const char *interface,
1446
1414
const float delay){
1447
1415
struct dirent **direntries;
1450
1418
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
1419
alphasort);
1452
1420
if(numhooks == -1){
1453
if(errno == ENOENT){
1454
if(debug){
1455
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1456
" found\n", hookdir);
1457
}
1458
} else {
1459
perror_plus("scandir");
1460
}
1421
perror_plus("scandir");
1461
1422
} else {
1462
1423
int devnull = open("/dev/null", O_RDONLY);
1463
1424
for(int i = 0; i < numhooks; i++){
1464
direntry = direntries[i];
1425
direntry = direntries[0];
1465
1426
char *fullname = NULL;
1466
1427
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1467
1428
if(ret < 0){
1468
1429
perror_plus("asprintf");
1469
1430
continue;
1470
1431
}
1471
if(debug){
1472
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1473
direntry->d_name);
1474
}
1475
1432
pid_t hook_pid = fork();
1476
1433
if(hook_pid == 0){
1477
1434
/* Child */
1478
/* Raise privileges */
1479
raise_privileges_permanently();
1480
/* Set group */
1481
errno = 0;
1482
ret = setgid(0);
1483
if(ret == -1){
1484
perror_plus("setgid");
1485
}
1486
/* Reset supplementary groups */
1487
errno = 0;
1488
ret = setgroups(0, NULL);
1489
if(ret == -1){
1490
perror_plus("setgroups");
1491
}
1492
1435
dup2(devnull, STDIN_FILENO);
1493
1436
close(devnull);
1494
1437
dup2(STDERR_FILENO, STDOUT_FILENO);
1495
1438
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1496
1439
if(ret == -1){
1497
1440
perror_plus("setenv");
1498
_exit(EX_OSERR);
1441
return false;
1499
1442
}
1500
1443
ret = setenv("DEVICE", interface, 1);
1501
1444
if(ret == -1){
1502
1445
perror_plus("setenv");
1503
_exit(EX_OSERR);
1446
return false;
1504
1447
}
1505
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1448
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1506
1449
if(ret == -1){
1507
1450
perror_plus("setenv");
1508
_exit(EX_OSERR);
1451
return false;
1509
1452
}
1510
1453
ret = setenv("MODE", mode, 1);
1511
1454
if(ret == -1){
1512
1455
perror_plus("setenv");
1513
_exit(EX_OSERR);
1456
return false;
1514
1457
}
1515
1458
char *delaystring;
1516
1459
ret = asprintf(&delaystring, "%f", delay);
1517
1460
if(ret == -1){
1518
1461
perror_plus("asprintf");
1519
_exit(EX_OSERR);
1462
return false;
1520
1463
}
1521
1464
ret = setenv("DELAY", delaystring, 1);
1522
1465
if(ret == -1){
1523
1466
free(delaystring);
1524
1467
perror_plus("setenv");
1525
_exit(EX_OSERR);
1468
return false;
1526
1469
}
1527
1470
free(delaystring);
1528
if(connect_to != NULL){
1529
ret = setenv("CONNECT", connect_to, 1);
1530
if(ret == -1){
1531
perror_plus("setenv");
1532
_exit(EX_OSERR);
1533
}
1534
}
1535
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1536
perror_plus("execl");
1537
_exit(EXIT_FAILURE);
1538
}
1471
ret = execl(fullname, direntry->d_name, mode, NULL);
1472
perror_plus("execl");
1539
1473
} else {
1540
1474
int status;
1541
1475
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1545
1479
}
1546
1480
if(WIFEXITED(status)){
1547
1481
if(WEXITSTATUS(status) != 0){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1549
" with status %d\n", direntry->d_name,
1550
WEXITSTATUS(status));
1482
fprintf(stderr, "Mandos plugin mandos-client: "
1483
"Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1551
1486
free(fullname);
1552
1487
continue;
1553
1488
}
1554
1489
} else if(WIFSIGNALED(status)){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1556
" signal %d\n", direntry->d_name,
1557
WTERMSIG(status));
1490
fprintf(stderr, "Mandos plugin mandos-client: "
1491
"Warning: network hook \"%s\" died by"
1492
" signal %d\n", direntry->d_name,
1493
WTERMSIG(status));
1558
1494
free(fullname);
1559
1495
continue;
1560
1496
} else {
1561
fprintf_plus(stderr, "Warning: network hook \"%s\""
1562
" crashed\n", direntry->d_name);
1497
fprintf(stderr, "Mandos plugin mandos-client: "
1498
"Warning: network hook \"%s\" crashed\n",
1499
direntry->d_name);
1563
1500
free(fullname);
1564
1501
continue;
1565
1502
}
1566
1503
}
1567
1504
free(fullname);
1568
if(debug){
1569
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1570
direntry->d_name);
1505
if(quit_now){
1506
break;
1571
1507
}
1572
1508
}
1573
1509
close(devnull);
1575
1511
return true;
1576
1512
}
1577
1513
1578
error_t bring_up_interface(const char *const interface,
1579
const float delay){
1580
int sd = -1;
1581
error_t old_errno = errno;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1584
struct ifreq network;
1585
unsigned int if_index = if_nametoindex(interface);
1586
if(if_index == 0){
1587
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1588
errno = old_errno;
1589
return ENXIO;
1590
}
1591
1592
if(quit_now){
1593
errno = old_errno;
1594
return EINTR;
1595
}
1596
1597
if(not interface_is_up(interface)){
1598
if(not get_flags(interface, &network) and debug){
1599
ret_errno = errno;
1600
fprintf_plus(stderr, "Failed to get flags for interface "
1601
"\"%s\"\n", interface);
1602
return ret_errno;
1603
}
1604
network.ifr_flags |= IFF_UP;
1605
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1608
ret_errno = errno;
1609
perror_plus("socket");
1610
errno = old_errno;
1611
return ret_errno;
1612
}
1613
1614
if(quit_now){
1615
close(sd);
1616
errno = old_errno;
1617
return EINTR;
1618
}
1619
1620
if(debug){
1621
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1622
interface);
1623
}
1624
1625
/* Raise priviliges */
1626
raise_privileges();
1627
1628
#ifdef __linux__
1629
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1630
messages about the network interface to mess up the prompt */
1631
int ret_linux = klogctl(8, NULL, 5);
1632
bool restore_loglevel = true;
1633
if(ret_linux == -1){
1634
restore_loglevel = false;
1635
perror_plus("klogctl");
1636
}
1637
#endif /* __linux__ */
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1640
#ifdef __linux__
1641
if(restore_loglevel){
1642
ret_linux = klogctl(7, NULL, 0);
1643
if(ret_linux == -1){
1644
perror_plus("klogctl");
1645
}
1646
}
1647
#endif /* __linux__ */
1648
1649
/* Lower privileges */
1650
lower_privileges();
1651
1652
/* Close the socket */
1653
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1654
if(ret == -1){
1655
perror_plus("close");
1656
}
1657
1658
if(ret_setflags == -1){
1659
errno = ret_errno;
1660
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1661
errno = old_errno;
1662
return ret_errno;
1663
}
1664
} else if(debug){
1665
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1666
interface);
1667
}
1668
1669
/* Sleep checking until interface is running.
1670
Check every 0.25s, up to total time of delay */
1671
for(int i=0; i < delay * 4; i++){
1672
if(interface_is_running(interface)){
1673
break;
1674
}
1675
struct timespec sleeptime = { .tv_nsec = 250000000 };
1676
ret = nanosleep(&sleeptime, NULL);
1677
if(ret == -1 and errno != EINTR){
1678
perror_plus("nanosleep");
1679
}
1680
}
1681
1682
errno = old_errno;
1683
return 0;
1684
}
1685
1686
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1688
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1691
struct ifreq network;
1692
unsigned int if_index = if_nametoindex(interface);
1693
if(if_index == 0){
1694
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1695
errno = old_errno;
1696
return ENXIO;
1697
}
1698
if(interface_is_up(interface)){
1699
if(not get_flags(interface, &network) and debug){
1700
ret_errno = errno;
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1702
"\"%s\"\n", interface);
1703
return ret_errno;
1704
}
1705
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1706
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1709
ret_errno = errno;
1710
perror_plus("socket");
1711
errno = old_errno;
1712
return ret_errno;
1713
}
1714
1715
if(debug){
1716
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1717
interface);
1718
}
1719
1720
/* Raise priviliges */
1721
raise_privileges();
1722
1723
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1724
ret_errno = errno;
1725
1726
/* Lower privileges */
1727
lower_privileges();
1728
1729
/* Close the socket */
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1731
if(ret == -1){
1732
perror_plus("close");
1733
}
1734
1735
if(ret_setflags == -1){
1736
errno = ret_errno;
1737
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
errno = old_errno;
1739
return ret_errno;
1740
}
1741
} else if(debug){
1742
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1743
interface);
1744
}
1745
1746
errno = old_errno;
1747
return 0;
1748
}
1749
1750
1514
int main(int argc, char *argv[]){
1751
1515
AvahiSServiceBrowser *sb = NULL;
1752
error_t ret_errno;
1516
int error;
1753
1517
int ret;
1754
1518
intmax_t tmpmax;
1755
1519
char *tmp;
1756
1520
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1759
char *interfaces_to_take_down = NULL;
1760
size_t interfaces_to_take_down_size = 0;
1521
const char *interface = "";
1522
struct ifreq network;
1523
int sd = -1;
1524
bool take_down_interface = false;
1525
uid_t uid;
1526
gid_t gid;
1761
1527
char tempdir[] = "/tmp/mandosXXXXXX";
1762
1528
bool tempdir_created = false;
1763
1529
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1764
1530
const char *seckey = PATHDIR "/" SECKEY;
1765
1531
const char *pubkey = PATHDIR "/" PUBKEY;
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1768
1532
1769
1533
bool gnutls_initialized = false;
1770
1534
bool gpgme_initialized = false;
1832
1596
.group = 2 },
1833
1597
{ .name = "retry", .key = 132,
1834
1598
.arg = "SECONDS",
1835
.doc = "Retry interval used when denied by the Mandos server",
1599
.doc = "Retry interval used when denied by the mandos server",
1836
1600
.group = 2 },
1837
1601
{ .name = "network-hook-dir", .key = 133,
1838
1602
.arg = "DIR",
1861
1625
connect_to = arg;
1862
1626
break;
1863
1627
case 'i': /* --interface */
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
1866
if(ret_errno != 0){
1867
argp_error(state, "%s", strerror(ret_errno));
1868
}
1628
interface = arg;
1869
1629
break;
1870
1630
case 's': /* --seckey */
1871
1631
seckey = arg;
1914
1674
argp_state_help(state, state->out_stream,
1915
1675
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1916
1676
case 'V': /* --version */
1917
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1677
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1678
fprintf(state->out_stream, "%s\n", argp_program_version);
1918
1679
exit(argp_err_exit_status);
1919
1680
break;
1920
1681
default:
1947
1708
{
1948
1709
/* Work around Debian bug #633582:
1949
1710
<http://bugs.debian.org/633582> */
1711
struct stat st;
1950
1712
1951
1713
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
1953
struct stat st;
1954
1955
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1956
int seckey_fd = open(seckey, O_RDONLY);
1957
if(seckey_fd == -1){
1958
perror_plus("open");
1959
} else {
1960
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1961
if(ret == -1){
1962
perror_plus("fstat");
1963
} else {
1964
if(S_ISREG(st.st_mode)
1965
and st.st_uid == 0 and st.st_gid == 0){
1966
ret = fchown(seckey_fd, uid, gid);
1967
if(ret == -1){
1968
perror_plus("fchown");
1969
}
1970
}
1971
}
1972
TEMP_FAILURE_RETRY(close(seckey_fd));
1973
}
1974
}
1975
1976
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1977
int pubkey_fd = open(pubkey, O_RDONLY);
1978
if(pubkey_fd == -1){
1979
perror_plus("open");
1980
} else {
1981
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1982
if(ret == -1){
1983
perror_plus("fstat");
1984
} else {
1985
if(S_ISREG(st.st_mode)
1986
and st.st_uid == 0 and st.st_gid == 0){
1987
ret = fchown(pubkey_fd, uid, gid);
1988
if(ret == -1){
1989
perror_plus("fchown");
1990
}
1991
}
1992
}
1993
TEMP_FAILURE_RETRY(close(pubkey_fd));
1994
}
1995
}
1996
1997
/* Lower privileges */
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2002
}
2003
}
2004
}
2005
2006
/* Remove empty interface names */
2007
{
2008
char *interface = NULL;
2009
while((interface = argz_next(interfaces, interfaces_size,
2010
interface))){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2013
fprintf_plus(stderr, "Not using nonexisting interface"
2014
" \"%s\"\n", interface);
2015
}
2016
argz_delete(&interfaces, &interfaces_size, interface);
2017
interface = NULL;
2018
}
1714
errno = 0;
1715
ret = seteuid(0);
1716
if(ret == -1){
1717
perror_plus("seteuid");
1718
}
1719
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1724
} else {
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1726
if(ret == -1){
1727
perror_plus("fstat");
1728
} else {
1729
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1730
ret = fchown(seckey_fd, uid, gid);
1731
if(ret == -1){
1732
perror_plus("fchown");
1733
}
1734
}
1735
}
1736
TEMP_FAILURE_RETRY(close(seckey_fd));
1737
}
1738
}
1739
1740
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1741
int pubkey_fd = open(pubkey, O_RDONLY);
1742
if(pubkey_fd == -1){
1743
perror_plus("open");
1744
} else {
1745
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1746
if(ret == -1){
1747
perror_plus("fstat");
1748
} else {
1749
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1760
/* Lower privileges */
1761
errno = 0;
1762
ret = seteuid(uid);
1763
if(ret == -1){
1764
perror_plus("seteuid");
2019
1765
}
2020
1766
}
2021
1767
2022
1768
/* Run network hooks */
2023
1769
{
2024
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2027
if(interfaces_hooks == NULL){
2028
perror_plus("malloc");
2029
goto end;
2030
}
2031
memcpy(interfaces_hooks, interfaces, interfaces_size);
2032
interfaces_hooks_size = interfaces_size;
2033
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2034
(int)',');
1770
/* Re-raise priviliges */
1771
errno = 0;
1772
ret = seteuid(0);
1773
if(ret == -1){
1774
perror_plus("seteuid");
2035
1775
}
2036
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2037
interfaces_hooks : "", delay)){
1776
if(not run_network_hooks("start", interface, delay)){
2038
1777
goto end;
2039
1778
}
1779
/* Lower privileges */
1780
errno = 0;
1781
ret = seteuid(uid);
1782
if(ret == -1){
1783
perror_plus("seteuid");
1784
}
2040
1785
}
2041
1786
2042
1787
if(not debug){
2043
1788
avahi_set_log_function(empty_log);
2044
1789
}
2045
1790
1791
if(interface[0] == '\0'){
1792
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1795
alphasort);
1796
if(ret == 0){
1797
/* No up interfaces, look for any good interfaces */
1798
free(direntries);
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1800
alphasort);
1801
}
1802
if(ret >= 1){
1803
/* Pick the first interface returned */
1804
interface = strdup(direntries[0]->d_name);
1805
if(debug){
1806
fprintf(stderr, "Mandos plugin mandos-client: "
1807
"Using interface \"%s\"\n", interface);
1808
}
1809
if(interface == NULL){
1810
perror_plus("malloc");
1811
free(direntries);
1812
exitcode = EXIT_FAILURE;
1813
goto end;
1814
}
1815
free(direntries);
1816
} else {
1817
free(direntries);
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Could not find a network interface\n");
1820
exitcode = EXIT_FAILURE;
1821
goto end;
1822
}
1823
}
1824
2046
1825
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2047
1826
from the signal handler */
2048
1827
/* Initialize the pseudo-RNG for Avahi */
2049
1828
srand((unsigned int) time(NULL));
2050
1829
mc.simple_poll = avahi_simple_poll_new();
2051
1830
if(mc.simple_poll == NULL){
2052
fprintf_plus(stderr,
2053
"Avahi: Failed to create simple poll object.\n");
1831
fprintf(stderr, "Mandos plugin mandos-client: "
1832
"Avahi: Failed to create simple poll object.\n");
2054
1833
exitcode = EX_UNAVAILABLE;
2055
1834
goto end;
2056
1835
}
2118
1897
}
2119
1898
}
2120
1899
2121
/* If no interfaces were specified, make a list */
2122
if(interfaces == NULL){
2123
struct dirent **direntries;
2124
/* Look for any good interfaces */
2125
ret = scandir(sys_class_net, &direntries, good_interface,
2126
alphasort);
2127
if(ret >= 1){
2128
/* Add all found interfaces to interfaces list */
2129
for(int i = 0; i < ret; ++i){
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2131
direntries[i]->d_name);
2132
if(ret_errno != 0){
2133
perror_plus("argz_add");
2134
continue;
2135
}
2136
if(debug){
2137
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2138
direntries[i]->d_name);
2139
}
2140
}
2141
free(direntries);
2142
} else {
2143
free(direntries);
2144
fprintf_plus(stderr, "Could not find a network interface\n");
2145
exitcode = EXIT_FAILURE;
2146
goto end;
2147
}
2148
}
2149
2150
/* If we only got one interface, explicitly use only that one */
2151
if(argz_count(interfaces, interfaces_size) == 1){
2152
if(debug){
2153
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2154
interfaces);
2155
}
2156
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2157
}
2158
2159
/* Bring up interfaces which are down */
2160
if(not (argz_count(interfaces, interfaces_size) == 1
2161
and strcmp(interfaces, "none") == 0)){
2162
char *interface = NULL;
2163
while((interface = argz_next(interfaces, interfaces_size,
2164
interface))){
2165
bool interface_was_up = interface_is_up(interface);
2166
ret = bring_up_interface(interface, delay);
2167
if(not interface_was_up){
2168
if(ret != 0){
2169
errno = ret;
2170
perror_plus("Failed to bring up interface");
2171
} else {
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2174
interface);
2175
}
2176
}
2177
}
2178
free(interfaces);
2179
interfaces = NULL;
2180
interfaces_size = 0;
2181
if(debug and (interfaces_to_take_down == NULL)){
2182
fprintf_plus(stderr, "No interfaces were brought up\n");
1900
/* If the interface is down, bring it up */
1901
if(strcmp(interface, "none") != 0){
1902
if_index = (AvahiIfIndex) if_nametoindex(interface);
1903
if(if_index == 0){
1904
fprintf(stderr, "Mandos plugin mandos-client: "
1905
"No such interface: \"%s\"\n", interface);
1906
exitcode = EX_UNAVAILABLE;
1907
goto end;
1908
}
1909
1910
if(quit_now){
1911
goto end;
1912
}
1913
1914
/* Re-raise priviliges */
1915
errno = 0;
1916
ret = seteuid(0);
1917
if(ret == -1){
1918
perror_plus("seteuid");
1919
}
1920
1921
#ifdef __linux__
1922
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1923
messages about the network interface to mess up the prompt */
1924
ret = klogctl(8, NULL, 5);
1925
bool restore_loglevel = true;
1926
if(ret == -1){
1927
restore_loglevel = false;
1928
perror_plus("klogctl");
1929
}
1930
#endif /* __linux__ */
1931
1932
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1933
if(sd < 0){
1934
perror_plus("socket");
1935
exitcode = EX_OSERR;
1936
#ifdef __linux__
1937
if(restore_loglevel){
1938
ret = klogctl(7, NULL, 0);
1939
if(ret == -1){
1940
perror_plus("klogctl");
1941
}
1942
}
1943
#endif /* __linux__ */
1944
/* Lower privileges */
1945
errno = 0;
1946
ret = seteuid(uid);
1947
if(ret == -1){
1948
perror_plus("seteuid");
1949
}
1950
goto end;
1951
}
1952
strcpy(network.ifr_name, interface);
1953
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1954
if(ret == -1){
1955
perror_plus("ioctl SIOCGIFFLAGS");
1956
#ifdef __linux__
1957
if(restore_loglevel){
1958
ret = klogctl(7, NULL, 0);
1959
if(ret == -1){
1960
perror_plus("klogctl");
1961
}
1962
}
1963
#endif /* __linux__ */
1964
exitcode = EX_OSERR;
1965
/* Lower privileges */
1966
errno = 0;
1967
ret = seteuid(uid);
1968
if(ret == -1){
1969
perror_plus("seteuid");
1970
}
1971
goto end;
1972
}
1973
if((network.ifr_flags & IFF_UP) == 0){
1974
network.ifr_flags |= IFF_UP;
1975
take_down_interface = true;
1976
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1977
if(ret == -1){
1978
take_down_interface = false;
1979
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1980
exitcode = EX_OSERR;
1981
#ifdef __linux__
1982
if(restore_loglevel){
1983
ret = klogctl(7, NULL, 0);
1984
if(ret == -1){
1985
perror_plus("klogctl");
1986
}
1987
}
1988
#endif /* __linux__ */
1989
/* Lower privileges */
1990
errno = 0;
1991
ret = seteuid(uid);
1992
if(ret == -1){
1993
perror_plus("seteuid");
1994
}
1995
goto end;
1996
}
1997
}
1998
/* Sleep checking until interface is running.
1999
Check every 0.25s, up to total time of delay */
2000
for(int i=0; i < delay * 4; i++){
2001
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2002
if(ret == -1){
2003
perror_plus("ioctl SIOCGIFFLAGS");
2004
} else if(network.ifr_flags & IFF_RUNNING){
2005
break;
2006
}
2007
struct timespec sleeptime = { .tv_nsec = 250000000 };
2008
ret = nanosleep(&sleeptime, NULL);
2009
if(ret == -1 and errno != EINTR){
2010
perror_plus("nanosleep");
2011
}
2012
}
2013
if(not take_down_interface){
2014
/* We won't need the socket anymore */
2015
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2016
if(ret == -1){
2017
perror_plus("close");
2018
}
2019
}
2020
#ifdef __linux__
2021
if(restore_loglevel){
2022
/* Restores kernel loglevel to default */
2023
ret = klogctl(7, NULL, 0);
2024
if(ret == -1){
2025
perror_plus("klogctl");
2026
}
2027
}
2028
#endif /* __linux__ */
2029
/* Lower privileges */
2030
errno = 0;
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
2183
2035
}
2184
2036
}
2185
2037
2189
2041
2190
2042
ret = init_gnutls_global(pubkey, seckey);
2191
2043
if(ret == -1){
2192
fprintf_plus(stderr, "init_gnutls_global failed\n");
2044
fprintf(stderr, "Mandos plugin mandos-client: "
2045
"init_gnutls_global failed\n");
2193
2046
exitcode = EX_UNAVAILABLE;
2194
2047
goto end;
2195
2048
} else {
2211
2064
}
2212
2065
2213
2066
if(not init_gpgme(pubkey, seckey, tempdir)){
2214
fprintf_plus(stderr, "init_gpgme failed\n");
2067
fprintf(stderr, "Mandos plugin mandos-client: "
2068
"init_gpgme failed\n");
2215
2069
exitcode = EX_UNAVAILABLE;
2216
2070
goto end;
2217
2071
} else {
2226
2080
/* Connect directly, do not use Zeroconf */
2227
2081
/* (Mainly meant for debugging) */
2228
2082
char *address = strrchr(connect_to, ':');
2229
2230
2083
if(address == NULL){
2231
fprintf_plus(stderr, "No colon in address\n");
2084
fprintf(stderr, "Mandos plugin mandos-client: "
2085
"No colon in address\n");
2232
2086
exitcode = EX_USAGE;
2233
2087
goto end;
2234
2088
}
2237
2091
goto end;
2238
2092
}
2239
2093
2240
in_port_t port;
2094
uint16_t port;
2241
2095
errno = 0;
2242
2096
tmpmax = strtoimax(address+1, &tmp, 10);
2243
2097
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2244
or tmpmax != (in_port_t)tmpmax){
2245
fprintf_plus(stderr, "Bad port number\n");
2098
or tmpmax != (uint16_t)tmpmax){
2099
fprintf(stderr, "Mandos plugin mandos-client: "
2100
"Bad port number\n");
2246
2101
exitcode = EX_USAGE;
2247
2102
goto end;
2248
2103
}
2251
2106
goto end;
2252
2107
}
2253
2108
2254
port = (in_port_t)tmpmax;
2109
port = (uint16_t)tmpmax;
2255
2110
*address = '\0';
2256
2111
/* Colon in address indicates IPv6 */
2257
2112
int af;
2278
2133
break;
2279
2134
}
2280
2135
if(debug){
2281
fprintf_plus(stderr, "Retrying in %d seconds\n",
2282
(int)retry_interval);
2136
fprintf(stderr, "Mandos plugin mandos-client: "
2137
"Retrying in %d seconds\n", (int)retry_interval);
2283
2138
}
2284
2139
sleep((int)retry_interval);
2285
2140
}
2307
2162
/* Allocate a new server */
2308
2163
mc.server = avahi_server_new(avahi_simple_poll_get
2309
2164
(mc.simple_poll), &config, NULL,
2310
NULL, &ret_errno);
2165
NULL, &error);
2311
2166
2312
2167
/* Free the Avahi configuration data */
2313
2168
avahi_server_config_free(&config);
2315
2170
2316
2171
/* Check if creating the Avahi server object succeeded */
2317
2172
if(mc.server == NULL){
2318
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2319
avahi_strerror(ret_errno));
2173
fprintf(stderr, "Mandos plugin mandos-client: "
2174
"Failed to create Avahi server: %s\n",
2175
avahi_strerror(error));
2320
2176
exitcode = EX_UNAVAILABLE;
2321
2177
goto end;
2322
2178
}
2330
2186
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2331
2187
NULL, 0, browse_callback, NULL);
2332
2188
if(sb == NULL){
2333
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2334
avahi_strerror(avahi_server_errno(mc.server)));
2189
fprintf(stderr, "Mandos plugin mandos-client: "
2190
"Failed to create service browser: %s\n",
2191
avahi_strerror(avahi_server_errno(mc.server)));
2335
2192
exitcode = EX_UNAVAILABLE;
2336
2193
goto end;
2337
2194
}
2343
2200
/* Run the main loop */
2344
2201
2345
2202
if(debug){
2346
fprintf_plus(stderr, "Starting Avahi loop search\n");
2203
fprintf(stderr, "Mandos plugin mandos-client: "
2204
"Starting Avahi loop search\n");
2347
2205
}
2348
2206
2349
2207
ret = avahi_loop_with_timeout(mc.simple_poll,
2350
2208
(int)(retry_interval * 1000));
2351
2209
if(debug){
2352
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2353
(ret == 0) ? "successfully" : "with error");
2210
fprintf(stderr, "Mandos plugin mandos-client: "
2211
"avahi_loop_with_timeout exited %s\n",
2212
(ret == 0) ? "successfully" : "with error");
2354
2213
}
2355
2214
2356
2215
end:
2357
2216
2358
2217
if(debug){
2359
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2218
fprintf(stderr, "Mandos plugin mandos-client: "
2219
"%s exiting\n", argv[0]);
2360
2220
}
2361
2221
2362
2222
/* Cleanup things */
2378
2238
if(gpgme_initialized){
2379
2239
gpgme_release(mc.ctx);
2380
2240
}
2381
2241
2382
2242
/* Cleans up the circular linked list of Mandos servers the client
2383
2243
has seen */
2384
2244
if(mc.current_server != NULL){
2392
2252
2393
2253
/* Re-raise priviliges */
2394
2254
{
2395
raise_privileges();
2396
2255
errno = 0;
2256
ret = seteuid(0);
2257
if(ret == -1){
2258
perror_plus("seteuid");
2259
}
2397
2260
/* Run network hooks */
2398
run_network_hooks("stop", interfaces_hooks != NULL ?
2399
interfaces_hooks : "", delay);
2261
if(not run_network_hooks("stop", interface, delay)){
2262
goto end;
2263
}
2400
2264
2401
/* Take down the network interfaces which were brought up */
2402
{
2403
char *interface = NULL;
2404
while((interface=argz_next(interfaces_to_take_down,
2405
interfaces_to_take_down_size,
2406
interface))){
2407
ret_errno = take_down_interface(interface);
2408
if(ret_errno != 0){
2409
errno = ret_errno;
2410
perror_plus("Failed to take down interface");
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
2267
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2268
if(ret == -1){
2269
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
2271
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2273
if(ret == -1){
2274
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2411
2275
}
2412
2276
}
2413
if(debug and (interfaces_to_take_down == NULL)){
2414
fprintf_plus(stderr, "No interfaces needed to be taken"
2415
" down\n");
2277
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2278
if(ret == -1){
2279
perror_plus("close");
2416
2280
}
2417
2281
}
2418
2419
lower_privileges_permanently();
2420
}
2421
2422
free(interfaces_to_take_down);
2423
free(interfaces_hooks);
2282
}
2283
/* Lower privileges permanently */
2284
errno = 0;
2285
ret = setuid(uid);
2286
if(ret == -1){
2287
perror_plus("setuid");
2288
}
2424
2289
2425
2290
/* Removes the GPGME temp directory and all files inside */
2426
2291
if(tempdir_created){
2440
2305
}
2441
2306
ret = remove(fullname);
2442
2307
if(ret == -1){
2443
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2444
strerror(errno));
2308
fprintf(stderr, "Mandos plugin mandos-client: "
2309
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2445
2310
}
2446
2311
free(fullname);
2447
2312
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0