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- Committer: Björn Påhlsson
- Date: 2011-11-14 18:32:54 UTC
- mfrom: (505.3.7 client-network-hooks)
- mto: (505.3.9 client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: belorn@fukt.bsnet.se-20111114183254-ujkmu680jli1w3yd
merge
- 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
177
int fprintf_plus(FILE *stream, const char *format, ...){
187
178
va_list ap;
188
179
va_start (ap, format);
189
180
190
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
191
program_invocation_short_name));
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));
192
182
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
183
}
194
184
210
200
}
211
201
212
202
/* 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){
203
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
204
int af){
215
205
int ret;
216
206
server *new_server = malloc(sizeof(server));
217
207
if(new_server == NULL){
218
208
perror_plus("malloc");
219
return false;
209
return -1;
220
210
}
221
211
*new_server = (server){ .ip = strdup(ip),
222
212
.port = port,
224
214
.af = af };
225
215
if(new_server->ip == NULL){
226
216
perror_plus("strdup");
227
return false;
217
return -1;
228
218
}
229
219
/* Special case of first server */
230
220
if (mc.current_server == NULL){
241
231
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
242
232
if(ret == -1){
243
233
perror_plus("clock_gettime");
244
return false;
234
return -1;
245
235
}
246
return true;
236
return 0;
247
237
}
248
238
249
239
/*
271
261
272
262
rc = gpgme_data_new_from_fd(&pgp_data, fd);
273
263
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));
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
276
267
return false;
277
268
}
278
269
279
270
rc = gpgme_op_import(mc.ctx, pgp_data);
280
271
if(rc != GPG_ERR_NO_ERROR){
281
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
282
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf(stderr, "Mandos plugin mandos-client: "
273
"bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
283
275
return false;
284
276
}
285
277
292
284
}
293
285
294
286
if(debug){
295
fprintf_plus(stderr, "Initializing GPGME\n");
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"Initializing GPGME\n");
296
289
}
297
290
298
291
/* Init GPGME */
299
292
gpgme_check_version(NULL);
300
293
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
301
294
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));
295
fprintf(stderr, "Mandos plugin mandos-client: "
296
"bad gpgme_engine_check_version: %s: %s\n",
297
gpgme_strsource(rc), gpgme_strerror(rc));
304
298
return false;
305
299
}
306
300
307
301
/* Set GPGME home directory for the OpenPGP engine only */
308
302
rc = gpgme_get_engine_info(&engine_info);
309
303
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));
304
fprintf(stderr, "Mandos plugin mandos-client: "
305
"bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
312
307
return false;
313
308
}
314
309
while(engine_info != NULL){
320
315
engine_info = engine_info->next;
321
316
}
322
317
if(engine_info == NULL){
323
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
324
tempdir);
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"Could not set GPGME home dir to %s\n", tempdir);
325
320
return false;
326
321
}
327
322
328
323
/* Create new GPGME "context" */
329
324
rc = gpgme_new(&(mc.ctx));
330
325
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));
326
fprintf(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
334
329
return false;
335
330
}
336
331
355
350
ssize_t plaintext_length = 0;
356
351
357
352
if(debug){
358
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"Trying to decrypt OpenPGP data\n");
359
355
}
360
356
361
357
/* Create new GPGME data buffer from memory cryptotext */
362
358
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
363
359
0);
364
360
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));
361
fprintf(stderr, "Mandos plugin mandos-client: "
362
"bad gpgme_data_new_from_mem: %s: %s\n",
363
gpgme_strsource(rc), gpgme_strerror(rc));
367
364
return -1;
368
365
}
369
366
370
367
/* Create new empty GPGME data buffer for the plaintext */
371
368
rc = gpgme_data_new(&dh_plain);
372
369
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));
370
fprintf(stderr, "Mandos plugin mandos-client: "
371
"bad gpgme_data_new: %s: %s\n",
372
gpgme_strsource(rc), gpgme_strerror(rc));
376
373
gpgme_data_release(dh_crypto);
377
374
return -1;
378
375
}
381
378
data buffer */
382
379
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
383
380
if(rc != GPG_ERR_NO_ERROR){
384
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
385
gpgme_strsource(rc), gpgme_strerror(rc));
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"bad gpgme_op_decrypt: %s: %s\n",
383
gpgme_strsource(rc), gpgme_strerror(rc));
386
384
plaintext_length = -1;
387
385
if(debug){
388
386
gpgme_decrypt_result_t result;
389
387
result = gpgme_op_decrypt_result(mc.ctx);
390
388
if(result == NULL){
391
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
389
fprintf(stderr, "Mandos plugin mandos-client: "
390
"gpgme_op_decrypt_result failed\n");
392
391
} 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);
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"Unsupported algorithm: %s\n",
394
result->unsupported_algorithm);
395
fprintf(stderr, "Mandos plugin mandos-client: "
396
"Wrong key usage: %u\n",
397
result->wrong_key_usage);
397
398
if(result->file_name != NULL){
398
fprintf_plus(stderr, "File name: %s\n", result->file_name);
399
fprintf(stderr, "Mandos plugin mandos-client: "
400
"File name: %s\n", result->file_name);
399
401
}
400
402
gpgme_recipient_t recipient;
401
403
recipient = result->recipients;
402
404
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");
405
fprintf(stderr, "Mandos plugin mandos-client: "
406
"Public key algorithm: %s\n",
407
gpgme_pubkey_algo_name(recipient->pubkey_algo));
408
fprintf(stderr, "Mandos plugin mandos-client: "
409
"Key ID: %s\n", recipient->keyid);
410
fprintf(stderr, "Mandos plugin mandos-client: "
411
"Secret key available: %s\n",
412
recipient->status == GPG_ERR_NO_SECKEY
413
? "No" : "Yes");
410
414
recipient = recipient->next;
411
415
}
412
416
}
415
419
}
416
420
417
421
if(debug){
418
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
422
fprintf(stderr, "Mandos plugin mandos-client: "
423
"Decryption of OpenPGP data succeeded\n");
419
424
}
420
425
421
426
/* Seek back to the beginning of the GPGME plaintext data buffer */
452
457
}
453
458
454
459
if(debug){
455
fprintf_plus(stderr, "Decrypted password is: ");
460
fprintf(stderr, "Mandos plugin mandos-client: "
461
"Decrypted password is: ");
456
462
for(ssize_t i = 0; i < plaintext_length; i++){
457
463
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
458
464
}
470
476
}
471
477
472
478
static const char * safer_gnutls_strerror(int value){
473
const char *ret = gnutls_strerror(value);
479
const char *ret = gnutls_strerror(value); /* Spurious warning from
480
-Wunreachable-code */
474
481
if(ret == NULL)
475
482
ret = "(unknown)";
476
483
return ret;
479
486
/* GnuTLS log function callback */
480
487
static void debuggnutls(__attribute__((unused)) int level,
481
488
const char* string){
482
fprintf_plus(stderr, "GnuTLS: %s", string);
489
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
483
490
}
484
491
485
492
static int init_gnutls_global(const char *pubkeyfilename,
487
494
int ret;
488
495
489
496
if(debug){
490
fprintf_plus(stderr, "Initializing GnuTLS\n");
497
fprintf(stderr, "Mandos plugin mandos-client: "
498
"Initializing GnuTLS\n");
491
499
}
492
500
493
501
ret = gnutls_global_init();
494
502
if(ret != GNUTLS_E_SUCCESS){
495
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
496
safer_gnutls_strerror(ret));
503
fprintf(stderr, "Mandos plugin mandos-client: "
504
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
497
505
return -1;
498
506
}
499
507
508
516
/* OpenPGP credentials */
509
517
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
518
if(ret != GNUTLS_E_SUCCESS){
511
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
512
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Mandos plugin mandos-client: "
520
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
513
521
gnutls_global_deinit();
514
522
return -1;
515
523
}
516
524
517
525
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);
526
fprintf(stderr, "Mandos plugin mandos-client: "
527
"Attempting to use OpenPGP public key %s and"
528
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
529
seckeyfilename);
522
530
}
523
531
524
532
ret = gnutls_certificate_set_openpgp_key_file
525
533
(mc.cred, pubkeyfilename, seckeyfilename,
526
534
GNUTLS_OPENPGP_FMT_BASE64);
527
535
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));
536
fprintf(stderr,
537
"Mandos plugin mandos-client: "
538
"Error[%d] while reading the OpenPGP key pair ('%s',"
539
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
533
542
goto globalfail;
534
543
}
535
544
536
545
/* GnuTLS server initialization */
537
546
ret = gnutls_dh_params_init(&mc.dh_params);
538
547
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
540
" initialization: %s\n",
541
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS DH parameter initialization:"
550
" %s\n", safer_gnutls_strerror(ret));
542
551
goto globalfail;
543
552
}
544
553
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
545
554
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
safer_gnutls_strerror(ret));
555
fprintf(stderr, "Mandos plugin mandos-client: "
556
"Error in GnuTLS prime generation: %s\n",
557
safer_gnutls_strerror(ret));
548
558
goto globalfail;
549
559
}
550
560
570
580
}
571
581
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
572
582
if(ret != GNUTLS_E_SUCCESS){
573
fprintf_plus(stderr,
574
"Error in GnuTLS session initialization: %s\n",
575
safer_gnutls_strerror(ret));
583
fprintf(stderr, "Mandos plugin mandos-client: "
584
"Error in GnuTLS session initialization: %s\n",
585
safer_gnutls_strerror(ret));
576
586
}
577
587
578
588
{
585
595
}
586
596
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
587
597
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));
598
fprintf(stderr, "Mandos plugin mandos-client: "
599
"Syntax error at: %s\n", err);
600
fprintf(stderr, "Mandos plugin mandos-client: "
601
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
591
602
gnutls_deinit(*session);
592
603
return -1;
593
604
}
602
613
}
603
614
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
604
615
if(ret != GNUTLS_E_SUCCESS){
605
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
606
safer_gnutls_strerror(ret));
616
fprintf(stderr, "Mandos plugin mandos-client: "
617
"Error setting GnuTLS credentials: %s\n",
618
safer_gnutls_strerror(ret));
607
619
gnutls_deinit(*session);
608
620
return -1;
609
621
}
621
633
__attribute__((unused)) const char *txt){}
622
634
623
635
/* Called when a Mandos server is found */
624
static int start_mandos_communication(const char *ip, in_port_t port,
636
static int start_mandos_communication(const char *ip, uint16_t port,
625
637
AvahiIfIndex if_index,
626
638
int af){
627
639
int ret, tcp_sd = -1;
654
666
pf = PF_INET;
655
667
break;
656
668
default:
657
fprintf_plus(stderr, "Bad address family: %d\n", af);
669
fprintf(stderr, "Mandos plugin mandos-client: "
670
"Bad address family: %d\n", af);
658
671
errno = EINVAL;
659
672
return -1;
660
673
}
665
678
}
666
679
667
680
if(debug){
668
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
669
PRIuMAX "\n", ip, (uintmax_t)port);
681
fprintf(stderr, "Mandos plugin mandos-client: "
682
"Setting up a TCP connection to %s, port %" PRIu16
683
"\n", ip, port);
670
684
}
671
685
672
686
tcp_sd = socket(pf, SOCK_STREAM, 0);
698
712
}
699
713
if(ret == 0){
700
714
int e = errno;
701
fprintf_plus(stderr, "Bad address: %s\n", ip);
715
fprintf(stderr, "Mandos plugin mandos-client: "
716
"Bad address: %s\n", ip);
702
717
errno = e;
703
718
goto mandos_end;
704
719
}
705
720
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
721
to.in6.sin6_port = htons(port); /* Spurious warnings from
722
-Wconversion and
723
-Wunreachable-code */
724
707
725
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
726
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
727
-Wunreachable-code*/
710
728
if(if_index == AVAHI_IF_UNSPEC){
711
fprintf_plus(stderr, "An IPv6 link-local address is"
712
" incomplete without a network interface\n");
729
fprintf(stderr, "Mandos plugin mandos-client: "
730
"An IPv6 link-local address is incomplete"
731
" without a network interface\n");
713
732
errno = EINVAL;
714
733
goto mandos_end;
715
734
}
733
752
if(if_indextoname((unsigned int)if_index, interface) == NULL){
734
753
perror_plus("if_indextoname");
735
754
} else {
736
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
737
"\n", ip, interface, (uintmax_t)port);
755
fprintf(stderr, "Mandos plugin mandos-client: "
756
"Connection to: %s%%%s, port %" PRIu16 "\n",
757
ip, interface, port);
738
758
}
739
759
} else {
740
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
741
ip, (uintmax_t)port);
760
fprintf(stderr, "Mandos plugin mandos-client: "
761
"Connection to: %s, port %" PRIu16 "\n", ip, port);
742
762
}
743
763
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
764
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
754
774
perror_plus("inet_ntop");
755
775
} else {
756
776
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
777
fprintf(stderr, "Mandos plugin mandos-client: "
778
"Canonical address form: %s\n", addrstr);
758
779
}
759
780
}
760
781
}
814
835
}
815
836
816
837
if(debug){
817
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
838
fprintf(stderr, "Mandos plugin mandos-client: "
839
"Establishing TLS session with %s\n", ip);
818
840
}
819
841
820
842
if(quit_now){
822
844
goto mandos_end;
823
845
}
824
846
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);
847
/* Spurious warning from -Wint-to-pointer-cast */
848
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
830
849
831
850
if(quit_now){
832
851
errno = EINTR;
843
862
844
863
if(ret != GNUTLS_E_SUCCESS){
845
864
if(debug){
846
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
865
fprintf(stderr, "Mandos plugin mandos-client: "
866
"*** GnuTLS Handshake failed ***\n");
847
867
gnutls_perror(ret);
848
868
}
849
869
errno = EPROTO;
853
873
/* Read OpenPGP packet that contains the wanted password */
854
874
855
875
if(debug){
856
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
857
" %s\n", ip);
876
fprintf(stderr, "Mandos plugin mandos-client: "
877
"Retrieving OpenPGP encrypted password from %s\n", ip);
858
878
}
859
879
860
880
while(true){
898
918
}
899
919
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
900
920
if(ret < 0){
901
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
902
"***\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"*** GnuTLS Re-handshake failed ***\n");
903
923
gnutls_perror(ret);
904
924
errno = EPROTO;
905
925
goto mandos_end;
906
926
}
907
927
break;
908
928
default:
909
fprintf_plus(stderr, "Unknown error while reading data from"
910
" encrypted session with Mandos server\n");
929
fprintf(stderr, "Mandos plugin mandos-client: "
930
"Unknown error while reading data from"
931
" encrypted session with Mandos server\n");
911
932
gnutls_bye(session, GNUTLS_SHUT_RDWR);
912
933
errno = EIO;
913
934
goto mandos_end;
918
939
}
919
940
920
941
if(debug){
921
fprintf_plus(stderr, "Closing TLS session\n");
942
fprintf(stderr, "Mandos plugin mandos-client: "
943
"Closing TLS session\n");
922
944
}
923
945
924
946
if(quit_now){
953
975
if(ret == 0 and ferror(stdout)){
954
976
int e = errno;
955
977
if(debug){
956
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
957
strerror(errno));
978
fprintf(stderr, "Mandos plugin mandos-client: "
979
"Error writing encrypted data: %s\n",
980
strerror(errno));
958
981
}
959
982
errno = e;
960
983
goto mandos_end;
1005
1028
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1029
flags,
1007
1030
AVAHI_GCC_UNUSED void* userdata){
1008
if(r == NULL){
1009
return;
1010
}
1031
assert(r);
1011
1032
1012
1033
/* Called whenever a service has been resolved successfully or
1013
1034
timed out */
1019
1040
switch(event){
1020
1041
default:
1021
1042
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)));
1043
fprintf(stderr, "Mandos plugin mandos-client: "
1044
"(Avahi Resolver) Failed to resolve service '%s'"
1045
" of type '%s' in domain '%s': %s\n", name, type, domain,
1046
avahi_strerror(avahi_server_errno(mc.server)));
1026
1047
break;
1027
1048
1028
1049
case AVAHI_RESOLVER_FOUND:
1030
1051
char ip[AVAHI_ADDRESS_STR_MAX];
1031
1052
avahi_address_snprint(ip, sizeof(ip), address);
1032
1053
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);
1054
fprintf(stderr, "Mandos plugin mandos-client: "
1055
"Mandos server \"%s\" found on %s (%s, %"
1056
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1057
ip, (intmax_t)interface, port);
1036
1058
}
1037
int ret = start_mandos_communication(ip, (in_port_t)port,
1038
interface,
1059
int ret = start_mandos_communication(ip, port, interface,
1039
1060
avahi_proto_to_af(proto));
1040
1061
if(ret == 0){
1041
1062
avahi_simple_poll_quit(mc.simple_poll);
1042
1063
} 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
}
1064
ret = add_server(ip, port, interface,
1065
avahi_proto_to_af(proto));
1048
1066
}
1049
1067
}
1050
1068
}
1061
1079
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1080
flags,
1063
1081
AVAHI_GCC_UNUSED void* userdata){
1064
if(b == NULL){
1065
return;
1066
}
1082
assert(b);
1067
1083
1068
1084
/* Called whenever a new services becomes available on the LAN or
1069
1085
is removed from the LAN */
1076
1092
default:
1077
1093
case AVAHI_BROWSER_FAILURE:
1078
1094
1079
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1095
fprintf(stderr, "Mandos plugin mandos-client: "
1096
"(Avahi browser) %s\n",
1097
avahi_strerror(avahi_server_errno(mc.server)));
1081
1098
avahi_simple_poll_quit(mc.simple_poll);
1082
1099
return;
1083
1100
1090
1107
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
1108
name, type, domain, protocol, 0,
1092
1109
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)));
1110
fprintf(stderr, "Mandos plugin mandos-client: "
1111
"Avahi: Failed to resolve service '%s': %s\n",
1112
name, avahi_strerror(avahi_server_errno(mc.server)));
1096
1113
break;
1097
1114
1098
1115
case AVAHI_BROWSER_REMOVE:
1101
1118
case AVAHI_BROWSER_ALL_FOR_NOW:
1102
1119
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1103
1120
if(debug){
1104
fprintf_plus(stderr, "No Mandos server found, still"
1105
" searching...\n");
1121
fprintf(stderr, "Mandos plugin mandos-client: "
1122
"No Mandos server found, still searching...\n");
1106
1123
}
1107
1124
break;
1108
1125
}
1125
1142
1126
1143
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1144
int ret;
1128
error_t ret_errno;
1129
1145
1130
1146
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1131
1147
if(s < 0){
1132
ret_errno = errno;
1133
1148
perror_plus("socket");
1134
errno = ret_errno;
1135
1149
return false;
1136
1150
}
1137
1151
strcpy(ifr->ifr_name, ifname);
1138
1152
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1139
1153
if(ret == -1){
1140
1154
if(debug){
1141
ret_errno = errno;
1142
1155
perror_plus("ioctl SIOCGIFFLAGS");
1143
errno = ret_errno;
1144
1156
}
1145
1157
return false;
1146
1158
}
1152
1164
/* Reject the loopback device */
1153
1165
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
1166
if(debug){
1155
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1156
ifname);
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Rejecting loopback interface \"%s\"\n", ifname);
1157
1169
}
1158
1170
return false;
1159
1171
}
1160
1172
/* Accept point-to-point devices only if connect_to is specified */
1161
1173
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
1174
if(debug){
1163
fprintf_plus(stderr, "Accepting point-to-point interface"
1164
" \"%s\"\n", ifname);
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Accepting point-to-point interface \"%s\"\n", ifname);
1165
1177
}
1166
1178
return true;
1167
1179
}
1168
1180
/* Otherwise, reject non-broadcast-capable devices */
1169
1181
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
1182
if(debug){
1171
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1172
" \"%s\"\n", ifname);
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1173
1185
}
1174
1186
return false;
1175
1187
}
1176
1188
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
1189
if(ifr->ifr_flags & IFF_NOARP){
1178
1190
if(debug){
1179
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
ifname);
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Rejecting non-ARP interface \"%s\"\n", ifname);
1181
1193
}
1182
1194
return false;
1183
1195
}
1184
1196
1185
1197
/* Accept this device */
1186
1198
if(debug){
1187
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1199
fprintf(stderr, "Mandos plugin mandos-client: "
1200
"Interface \"%s\" is good\n", ifname);
1188
1201
}
1189
1202
return true;
1190
1203
}
1202
1215
struct ifreq ifr;
1203
1216
if(not get_flags(if_entry->d_name, &ifr)){
1204
1217
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);
1218
fprintf(stderr, "Mandos plugin mandos-client: "
1219
"Failed to get flags for interface \"%s\"\n",
1220
if_entry->d_name);
1221
}
1222
return 0;
1223
}
1224
1225
if(not good_flags(if_entry->d_name, &ifr)){
1226
return 0;
1227
}
1228
return 1;
1229
}
1230
1231
/*
1232
* This function determines if a directory entry in /sys/class/net
1233
* corresponds to an acceptable network device which is up.
1234
* (This function is passed to scandir(3) as a filter function.)
1235
*/
1236
int up_interface(const struct dirent *if_entry){
1237
if(if_entry->d_name[0] == '.'){
1238
return 0;
1239
}
1240
1241
struct ifreq ifr;
1242
if(not get_flags(if_entry->d_name, &ifr)){
1243
if(debug){
1244
fprintf(stderr, "Mandos plugin mandos-client: "
1245
"Failed to get flags for interface \"%s\"\n",
1246
if_entry->d_name);
1247
}
1248
return 0;
1249
}
1250
1251
/* Reject down interfaces */
1252
if(not (ifr.ifr_flags & IFF_UP)){
1253
if(debug){
1254
fprintf(stderr, "Mandos plugin mandos-client: "
1255
"Rejecting down interface \"%s\"\n",
1256
if_entry->d_name);
1257
}
1258
return 0;
1259
}
1260
1261
/* Reject non-running interfaces */
1262
if(not (ifr.ifr_flags & IFF_RUNNING)){
1263
if(debug){
1264
fprintf(stderr, "Mandos plugin mandos-client: "
1265
"Rejecting non-running interface \"%s\"\n",
1266
if_entry->d_name);
1267
}
1268
return 0;
1269
}
1270
1271
if(not good_flags(if_entry->d_name, &ifr)){
1272
return 0;
1273
}
1274
return 1;
1247
1275
}
1248
1276
1249
1277
int notdotentries(const struct dirent *direntry){
1275
1303
if((direntry->d_name)[sret] != '\0'){
1276
1304
/* Contains non-allowed characters */
1277
1305
if(debug){
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1279
direntry->d_name);
1306
fprintf(stderr, "Mandos plugin mandos-client: "
1307
"Ignoring hook \"%s\" with bad name\n",
1308
direntry->d_name);
1280
1309
}
1281
1310
return 0;
1282
1311
}
1298
1327
if(not (S_ISREG(st.st_mode))){
1299
1328
/* Not a regular file */
1300
1329
if(debug){
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1302
direntry->d_name);
1330
fprintf(stderr, "Mandos plugin mandos-client: "
1331
"Ignoring hook \"%s\" - not a file\n",
1332
direntry->d_name);
1303
1333
}
1304
1334
return 0;
1305
1335
}
1306
1336
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1307
1337
/* Not executable */
1308
1338
if(debug){
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1310
direntry->d_name);
1339
fprintf(stderr, "Mandos plugin mandos-client: "
1340
"Ignoring hook \"%s\" - not executable\n",
1341
direntry->d_name);
1311
1342
}
1312
1343
return 0;
1313
1344
}
1314
if(debug){
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1316
direntry->d_name);
1317
}
1318
1345
return 1;
1319
1346
}
1320
1347
1327
1354
while(true){
1328
1355
if(mc.current_server == NULL){
1329
1356
if (debug){
1330
fprintf_plus(stderr, "Wait until first server is found."
1331
" No timeout!\n");
1357
fprintf(stderr, "Mandos plugin mandos-client: "
1358
"Wait until first server is found. No timeout!\n");
1332
1359
}
1333
1360
ret = avahi_simple_poll_iterate(s, -1);
1334
1361
} else {
1335
1362
if (debug){
1336
fprintf_plus(stderr, "Check current_server if we should run"
1337
" it, or wait\n");
1363
fprintf(stderr, "Mandos plugin mandos-client: "
1364
"Check current_server if we should run it,"
1365
" or wait\n");
1338
1366
}
1339
1367
/* the current time */
1340
1368
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1356
1384
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1385
1358
1386
if (debug){
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
block_time);
1387
fprintf(stderr, "Mandos plugin mandos-client: "
1388
"Blocking for %" PRIdMAX " ms\n", block_time);
1361
1389
}
1362
1390
1363
1391
if(block_time <= 0){
1390
1418
}
1391
1419
}
1392
1420
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
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
}
1461
} else {
1462
int devnull = open("/dev/null", O_RDONLY);
1463
for(int i = 0; i < numhooks; i++){
1464
direntry = direntries[i];
1465
char *fullname = NULL;
1466
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1467
if(ret < 0){
1468
perror_plus("asprintf");
1469
continue;
1470
}
1471
if(debug){
1472
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1473
direntry->d_name);
1474
}
1475
pid_t hook_pid = fork();
1476
if(hook_pid == 0){
1477
/* 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
dup2(devnull, STDIN_FILENO);
1493
close(devnull);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1496
if(ret == -1){
1497
perror_plus("setenv");
1498
_exit(EX_OSERR);
1499
}
1500
ret = setenv("DEVICE", interface, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("MODE", mode, 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
char *delaystring;
1516
ret = asprintf(&delaystring, "%f", delay);
1517
if(ret == -1){
1518
perror_plus("asprintf");
1519
_exit(EX_OSERR);
1520
}
1521
ret = setenv("DELAY", delaystring, 1);
1522
if(ret == -1){
1523
free(delaystring);
1524
perror_plus("setenv");
1525
_exit(EX_OSERR);
1526
}
1527
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
}
1539
} else {
1540
int status;
1541
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1542
perror_plus("waitpid");
1543
free(fullname);
1544
continue;
1545
}
1546
if(WIFEXITED(status)){
1547
if(WEXITSTATUS(status) != 0){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1549
" with status %d\n", direntry->d_name,
1550
WEXITSTATUS(status));
1551
free(fullname);
1552
continue;
1553
}
1554
} else if(WIFSIGNALED(status)){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1556
" signal %d\n", direntry->d_name,
1557
WTERMSIG(status));
1558
free(fullname);
1559
continue;
1560
} else {
1561
fprintf_plus(stderr, "Warning: network hook \"%s\""
1562
" crashed\n", direntry->d_name);
1563
free(fullname);
1564
continue;
1565
}
1566
}
1567
free(fullname);
1568
if(debug){
1569
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1570
direntry->d_name);
1571
}
1572
}
1573
close(devnull);
1574
}
1575
return true;
1576
}
1577
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
1421
int main(int argc, char *argv[]){
1751
1422
AvahiSServiceBrowser *sb = NULL;
1752
error_t ret_errno;
1423
int error;
1753
1424
int ret;
1754
1425
intmax_t tmpmax;
1755
1426
char *tmp;
1756
1427
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;
1428
const char *interface = "";
1429
struct ifreq network;
1430
int sd = -1;
1431
bool take_down_interface = false;
1432
uid_t uid;
1433
gid_t gid;
1761
1434
char tempdir[] = "/tmp/mandosXXXXXX";
1762
1435
bool tempdir_created = false;
1763
1436
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1764
1437
const char *seckey = PATHDIR "/" SECKEY;
1765
1438
const char *pubkey = PATHDIR "/" PUBKEY;
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1768
1439
1769
1440
bool gnutls_initialized = false;
1770
1441
bool gpgme_initialized = false;
1832
1503
.group = 2 },
1833
1504
{ .name = "retry", .key = 132,
1834
1505
.arg = "SECONDS",
1835
.doc = "Retry interval used when denied by the Mandos server",
1506
.doc = "Retry interval used when denied by the mandos server",
1836
1507
.group = 2 },
1837
1508
{ .name = "network-hook-dir", .key = 133,
1838
1509
.arg = "DIR",
1861
1532
connect_to = arg;
1862
1533
break;
1863
1534
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
}
1535
interface = arg;
1869
1536
break;
1870
1537
case 's': /* --seckey */
1871
1538
seckey = arg;
1914
1581
argp_state_help(state, state->out_stream,
1915
1582
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1916
1583
case 'V': /* --version */
1917
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1584
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1585
fprintf(state->out_stream, "%s\n", argp_program_version);
1918
1586
exit(argp_err_exit_status);
1919
1587
break;
1920
1588
default:
1947
1615
{
1948
1616
/* Work around Debian bug #633582:
1949
1617
<http://bugs.debian.org/633582> */
1618
struct stat st;
1950
1619
1951
1620
/* 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
}
2019
}
2020
}
2021
2022
/* Run network hooks */
2023
{
2024
ret_errno = argz_append(&interfaces_hooks, &interfaces_hooks_size,
2025
interfaces, interfaces_size);
2026
if(ret_errno != 0){
2027
errno = ret_errno;
2028
perror_plus("argz_append");
2029
goto end;
2030
}
2031
argz_stringify(interfaces_hooks, interfaces_hooks_size, (int)',');
2032
if(not run_network_hooks("start", interfaces_hooks, delay)){
2033
goto end;
1621
errno = 0;
1622
ret = seteuid(0);
1623
if(ret == -1){
1624
perror_plus("seteuid");
1625
}
1626
1627
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1628
int seckey_fd = open(seckey, O_RDONLY);
1629
if(seckey_fd == -1){
1630
perror_plus("open");
1631
} else {
1632
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1633
if(ret == -1){
1634
perror_plus("fstat");
1635
} else {
1636
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1637
ret = fchown(seckey_fd, uid, gid);
1638
if(ret == -1){
1639
perror_plus("fchown");
1640
}
1641
}
1642
}
1643
TEMP_FAILURE_RETRY(close(seckey_fd));
1644
}
1645
}
1646
1647
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1648
int pubkey_fd = open(pubkey, O_RDONLY);
1649
if(pubkey_fd == -1){
1650
perror_plus("open");
1651
} else {
1652
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1653
if(ret == -1){
1654
perror_plus("fstat");
1655
} else {
1656
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1657
ret = fchown(pubkey_fd, uid, gid);
1658
if(ret == -1){
1659
perror_plus("fchown");
1660
}
1661
}
1662
}
1663
TEMP_FAILURE_RETRY(close(pubkey_fd));
1664
}
1665
}
1666
1667
/* Lower privileges */
1668
errno = 0;
1669
ret = seteuid(uid);
1670
if(ret == -1){
1671
perror_plus("seteuid");
1672
}
1673
}
1674
1675
/* Find network hooks and run them */
1676
{
1677
struct dirent **direntries;
1678
struct dirent *direntry;
1679
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1680
alphasort);
1681
if(numhooks == -1){
1682
perror_plus("scandir");
1683
} else {
1684
int devnull = open("/dev/null", O_RDONLY);
1685
for(int i = 0; i < numhooks; i++){
1686
direntry = direntries[0];
1687
char *fullname = NULL;
1688
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1689
if(ret < 0){
1690
perror_plus("asprintf");
1691
continue;
1692
}
1693
pid_t hook_pid = fork();
1694
if(hook_pid == 0){
1695
/* Child */
1696
dup2(devnull, STDIN_FILENO);
1697
close(devnull);
1698
dup2(STDERR_FILENO, STDOUT_FILENO);
1699
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1700
if(ret == -1){
1701
perror_plus("setenv");
1702
exit(1);
1703
}
1704
ret = setenv("DEVICE", interface, 1);
1705
if(ret == -1){
1706
perror_plus("setenv");
1707
exit(1);
1708
}
1709
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1710
if(ret == -1){
1711
perror_plus("setenv");
1712
exit(1);
1713
}
1714
ret = setenv("MODE", "start", 1);
1715
if(ret == -1){
1716
perror_plus("setenv");
1717
exit(1);
1718
}
1719
char *delaystring;
1720
ret = asprintf(&delaystring, "%f", delay);
1721
if(ret == -1){
1722
perror_plus("asprintf");
1723
exit(1);
1724
}
1725
ret = setenv("DELAY", delaystring, 1);
1726
if(ret == -1){
1727
free(delaystring);
1728
perror_plus("setenv");
1729
exit(1);
1730
}
1731
free(delaystring);
1732
ret = execl(fullname, direntry->d_name, "start", NULL);
1733
perror_plus("execl");
1734
} else {
1735
int status;
1736
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1737
perror_plus("waitpid");
1738
free(fullname);
1739
continue;
1740
}
1741
if(WIFEXITED(status)){
1742
if(WEXITSTATUS(status) != 0){
1743
fprintf(stderr, "Mandos plugin mandos-client: "
1744
"Warning: network hook \"%s\" exited"
1745
" with status %d\n", direntry->d_name,
1746
WEXITSTATUS(status));
1747
free(fullname);
1748
continue;
1749
}
1750
} else if(WIFSIGNALED(status)){
1751
fprintf(stderr, "Mandos plugin mandos-client: "
1752
"Warning: network hook \"%s\" died by"
1753
" signal %d\n", direntry->d_name,
1754
WTERMSIG(status));
1755
free(fullname);
1756
continue;
1757
} else {
1758
fprintf(stderr, "Mandos plugin mandos-client: "
1759
"Warning: network hook \"%s\" crashed\n",
1760
direntry->d_name);
1761
free(fullname);
1762
continue;
1763
}
1764
}
1765
free(fullname);
1766
if(quit_now){
1767
goto end;
1768
}
1769
}
1770
close(devnull);
2034
1771
}
2035
1772
}
2036
1773
2038
1775
avahi_set_log_function(empty_log);
2039
1776
}
2040
1777
1778
if(interface[0] == '\0'){
1779
struct dirent **direntries;
1780
/* First look for interfaces that are up */
1781
ret = scandir(sys_class_net, &direntries, up_interface,
1782
alphasort);
1783
if(ret == 0){
1784
/* No up interfaces, look for any good interfaces */
1785
free(direntries);
1786
ret = scandir(sys_class_net, &direntries, good_interface,
1787
alphasort);
1788
}
1789
if(ret >= 1){
1790
/* Pick the first interface returned */
1791
interface = strdup(direntries[0]->d_name);
1792
if(debug){
1793
fprintf(stderr, "Mandos plugin mandos-client: "
1794
"Using interface \"%s\"\n", interface);
1795
}
1796
if(interface == NULL){
1797
perror_plus("malloc");
1798
free(direntries);
1799
exitcode = EXIT_FAILURE;
1800
goto end;
1801
}
1802
free(direntries);
1803
} else {
1804
free(direntries);
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Could not find a network interface\n");
1807
exitcode = EXIT_FAILURE;
1808
goto end;
1809
}
1810
}
1811
2041
1812
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2042
1813
from the signal handler */
2043
1814
/* Initialize the pseudo-RNG for Avahi */
2044
1815
srand((unsigned int) time(NULL));
2045
1816
mc.simple_poll = avahi_simple_poll_new();
2046
1817
if(mc.simple_poll == NULL){
2047
fprintf_plus(stderr,
2048
"Avahi: Failed to create simple poll object.\n");
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Avahi: Failed to create simple poll object.\n");
2049
1820
exitcode = EX_UNAVAILABLE;
2050
1821
goto end;
2051
1822
}
2113
1884
}
2114
1885
}
2115
1886
2116
/* If no interfaces were specified, make a list */
2117
if(interfaces == NULL){
2118
struct dirent **direntries;
2119
/* Look for any good interfaces */
2120
ret = scandir(sys_class_net, &direntries, good_interface,
2121
alphasort);
2122
if(ret >= 1){
2123
/* Add all found interfaces to interfaces list */
2124
for(int i = 0; i < ret; ++i){
2125
ret_errno = argz_add(&interfaces, &interfaces_size,
2126
direntries[i]->d_name);
2127
if(ret_errno != 0){
2128
perror_plus("argz_add");
2129
continue;
2130
}
2131
if(debug){
2132
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2133
direntries[i]->d_name);
2134
}
2135
}
2136
free(direntries);
1887
/* If the interface is down, bring it up */
1888
if(strcmp(interface, "none") != 0){
1889
if_index = (AvahiIfIndex) if_nametoindex(interface);
1890
if(if_index == 0){
1891
fprintf(stderr, "Mandos plugin mandos-client: "
1892
"No such interface: \"%s\"\n", interface);
1893
exitcode = EX_UNAVAILABLE;
1894
goto end;
1895
}
1896
1897
if(quit_now){
1898
goto end;
1899
}
1900
1901
/* Re-raise priviliges */
1902
errno = 0;
1903
ret = seteuid(0);
1904
if(ret == -1){
1905
perror_plus("seteuid");
1906
}
1907
1908
#ifdef __linux__
1909
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1910
messages about the network interface to mess up the prompt */
1911
ret = klogctl(8, NULL, 5);
1912
bool restore_loglevel = true;
1913
if(ret == -1){
1914
restore_loglevel = false;
1915
perror_plus("klogctl");
1916
}
1917
#endif /* __linux__ */
1918
1919
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1920
if(sd < 0){
1921
perror_plus("socket");
1922
exitcode = EX_OSERR;
1923
#ifdef __linux__
1924
if(restore_loglevel){
1925
ret = klogctl(7, NULL, 0);
1926
if(ret == -1){
1927
perror_plus("klogctl");
1928
}
1929
}
1930
#endif /* __linux__ */
1931
/* Lower privileges */
1932
errno = 0;
1933
ret = seteuid(uid);
1934
if(ret == -1){
1935
perror_plus("seteuid");
1936
}
1937
goto end;
1938
}
1939
strcpy(network.ifr_name, interface);
1940
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1941
if(ret == -1){
1942
perror_plus("ioctl SIOCGIFFLAGS");
1943
#ifdef __linux__
1944
if(restore_loglevel){
1945
ret = klogctl(7, NULL, 0);
1946
if(ret == -1){
1947
perror_plus("klogctl");
1948
}
1949
}
1950
#endif /* __linux__ */
1951
exitcode = EX_OSERR;
1952
/* Lower privileges */
1953
errno = 0;
1954
ret = seteuid(uid);
1955
if(ret == -1){
1956
perror_plus("seteuid");
1957
}
1958
goto end;
1959
}
1960
if((network.ifr_flags & IFF_UP) == 0){
1961
network.ifr_flags |= IFF_UP;
1962
take_down_interface = true;
1963
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1964
if(ret == -1){
1965
take_down_interface = false;
1966
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1967
exitcode = EX_OSERR;
1968
#ifdef __linux__
1969
if(restore_loglevel){
1970
ret = klogctl(7, NULL, 0);
1971
if(ret == -1){
1972
perror_plus("klogctl");
1973
}
1974
}
1975
#endif /* __linux__ */
1976
/* Lower privileges */
1977
errno = 0;
1978
ret = seteuid(uid);
1979
if(ret == -1){
1980
perror_plus("seteuid");
1981
}
1982
goto end;
1983
}
1984
}
1985
/* Sleep checking until interface is running.
1986
Check every 0.25s, up to total time of delay */
1987
for(int i=0; i < delay * 4; i++){
1988
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1989
if(ret == -1){
1990
perror_plus("ioctl SIOCGIFFLAGS");
1991
} else if(network.ifr_flags & IFF_RUNNING){
1992
break;
1993
}
1994
struct timespec sleeptime = { .tv_nsec = 250000000 };
1995
ret = nanosleep(&sleeptime, NULL);
1996
if(ret == -1 and errno != EINTR){
1997
perror_plus("nanosleep");
1998
}
1999
}
2000
if(not take_down_interface){
2001
/* We won't need the socket anymore */
2002
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2003
if(ret == -1){
2004
perror_plus("close");
2005
}
2006
}
2007
#ifdef __linux__
2008
if(restore_loglevel){
2009
/* Restores kernel loglevel to default */
2010
ret = klogctl(7, NULL, 0);
2011
if(ret == -1){
2012
perror_plus("klogctl");
2013
}
2014
}
2015
#endif /* __linux__ */
2016
/* Lower privileges */
2017
errno = 0;
2018
if(take_down_interface){
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
2023
}
2137
2024
} else {
2138
free(direntries);
2139
fprintf_plus(stderr, "Could not find a network interface\n");
2140
exitcode = EXIT_FAILURE;
2141
goto end;
2142
}
2143
}
2144
2145
/* If we only got one interface, explicitly use only that one */
2146
if(argz_count(interfaces, interfaces_size) == 1){
2147
if(debug){
2148
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2149
interfaces);
2150
}
2151
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2152
}
2153
2154
/* Bring up interfaces which are down */
2155
if(not (argz_count(interfaces, interfaces_size) == 1
2156
and strcmp(interfaces, "none") == 0)){
2157
char *interface = NULL;
2158
while((interface = argz_next(interfaces, interfaces_size,
2159
interface))){
2160
bool interface_was_up = interface_is_up(interface);
2161
ret = bring_up_interface(interface, delay);
2162
if(not interface_was_up){
2163
if(ret != 0){
2164
errno = ret;
2165
perror_plus("Failed to bring up interface");
2166
} else {
2167
ret_errno = argz_add(&interfaces_to_take_down,
2168
&interfaces_to_take_down_size,
2169
interface);
2170
}
2025
/* Lower privileges permanently */
2026
ret = setuid(uid);
2027
if(ret == -1){
2028
perror_plus("setuid");
2171
2029
}
2172
2030
}
2173
free(interfaces);
2174
interfaces = NULL;
2175
interfaces_size = 0;
2176
if(debug and (interfaces_to_take_down == NULL)){
2177
fprintf_plus(stderr, "No interfaces were brought up\n");
2178
}
2179
2031
}
2180
2032
2181
2033
if(quit_now){
2184
2036
2185
2037
ret = init_gnutls_global(pubkey, seckey);
2186
2038
if(ret == -1){
2187
fprintf_plus(stderr, "init_gnutls_global failed\n");
2039
fprintf(stderr, "Mandos plugin mandos-client: "
2040
"init_gnutls_global failed\n");
2188
2041
exitcode = EX_UNAVAILABLE;
2189
2042
goto end;
2190
2043
} else {
2206
2059
}
2207
2060
2208
2061
if(not init_gpgme(pubkey, seckey, tempdir)){
2209
fprintf_plus(stderr, "init_gpgme failed\n");
2062
fprintf(stderr, "Mandos plugin mandos-client: "
2063
"init_gpgme failed\n");
2210
2064
exitcode = EX_UNAVAILABLE;
2211
2065
goto end;
2212
2066
} else {
2221
2075
/* Connect directly, do not use Zeroconf */
2222
2076
/* (Mainly meant for debugging) */
2223
2077
char *address = strrchr(connect_to, ':');
2224
2225
2078
if(address == NULL){
2226
fprintf_plus(stderr, "No colon in address\n");
2079
fprintf(stderr, "Mandos plugin mandos-client: "
2080
"No colon in address\n");
2227
2081
exitcode = EX_USAGE;
2228
2082
goto end;
2229
2083
}
2232
2086
goto end;
2233
2087
}
2234
2088
2235
in_port_t port;
2089
uint16_t port;
2236
2090
errno = 0;
2237
2091
tmpmax = strtoimax(address+1, &tmp, 10);
2238
2092
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2239
or tmpmax != (in_port_t)tmpmax){
2240
fprintf_plus(stderr, "Bad port number\n");
2093
or tmpmax != (uint16_t)tmpmax){
2094
fprintf(stderr, "Mandos plugin mandos-client: "
2095
"Bad port number\n");
2241
2096
exitcode = EX_USAGE;
2242
2097
goto end;
2243
2098
}
2246
2101
goto end;
2247
2102
}
2248
2103
2249
port = (in_port_t)tmpmax;
2104
port = (uint16_t)tmpmax;
2250
2105
*address = '\0';
2251
2106
/* Colon in address indicates IPv6 */
2252
2107
int af;
2273
2128
break;
2274
2129
}
2275
2130
if(debug){
2276
fprintf_plus(stderr, "Retrying in %d seconds\n",
2277
(int)retry_interval);
2131
fprintf(stderr, "Mandos plugin mandos-client: "
2132
"Retrying in %d seconds\n", (int)retry_interval);
2278
2133
}
2279
2134
sleep((int)retry_interval);
2280
2135
}
2302
2157
/* Allocate a new server */
2303
2158
mc.server = avahi_server_new(avahi_simple_poll_get
2304
2159
(mc.simple_poll), &config, NULL,
2305
NULL, &ret_errno);
2160
NULL, &error);
2306
2161
2307
2162
/* Free the Avahi configuration data */
2308
2163
avahi_server_config_free(&config);
2310
2165
2311
2166
/* Check if creating the Avahi server object succeeded */
2312
2167
if(mc.server == NULL){
2313
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2314
avahi_strerror(ret_errno));
2168
fprintf(stderr, "Mandos plugin mandos-client: "
2169
"Failed to create Avahi server: %s\n",
2170
avahi_strerror(error));
2315
2171
exitcode = EX_UNAVAILABLE;
2316
2172
goto end;
2317
2173
}
2325
2181
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2326
2182
NULL, 0, browse_callback, NULL);
2327
2183
if(sb == NULL){
2328
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2329
avahi_strerror(avahi_server_errno(mc.server)));
2184
fprintf(stderr, "Mandos plugin mandos-client: "
2185
"Failed to create service browser: %s\n",
2186
avahi_strerror(avahi_server_errno(mc.server)));
2330
2187
exitcode = EX_UNAVAILABLE;
2331
2188
goto end;
2332
2189
}
2338
2195
/* Run the main loop */
2339
2196
2340
2197
if(debug){
2341
fprintf_plus(stderr, "Starting Avahi loop search\n");
2198
fprintf(stderr, "Mandos plugin mandos-client: "
2199
"Starting Avahi loop search\n");
2342
2200
}
2343
2201
2344
2202
ret = avahi_loop_with_timeout(mc.simple_poll,
2345
2203
(int)(retry_interval * 1000));
2346
2204
if(debug){
2347
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2348
(ret == 0) ? "successfully" : "with error");
2205
fprintf(stderr, "Mandos plugin mandos-client: "
2206
"avahi_loop_with_timeout exited %s\n",
2207
(ret == 0) ? "successfully" : "with error");
2349
2208
}
2350
2209
2351
2210
end:
2352
2211
2353
2212
if(debug){
2354
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2213
fprintf(stderr, "Mandos plugin mandos-client: "
2214
"%s exiting\n", argv[0]);
2355
2215
}
2356
2216
2357
2217
/* Cleanup things */
2373
2233
if(gpgme_initialized){
2374
2234
gpgme_release(mc.ctx);
2375
2235
}
2376
2236
2377
2237
/* Cleans up the circular linked list of Mandos servers the client
2378
2238
has seen */
2379
2239
if(mc.current_server != NULL){
2385
2245
}
2386
2246
}
2387
2247
2388
/* Re-raise priviliges */
2389
{
2390
raise_privileges();
2391
2392
/* Run network hooks */
2393
run_network_hooks("stop", interfaces_hooks, delay);
2394
2395
/* Take down the network interfaces which were brought up */
2396
{
2397
char *interface = NULL;
2398
while((interface=argz_next(interfaces_to_take_down,
2399
interfaces_to_take_down_size,
2400
interface))){
2401
ret_errno = take_down_interface(interface);
2402
if(ret_errno != 0){
2403
errno = ret_errno;
2404
perror_plus("Failed to take down interface");
2248
/* XXX run network hooks "stop" here */
2249
2250
/* Take down the network interface */
2251
if(take_down_interface){
2252
/* Re-raise priviliges */
2253
errno = 0;
2254
ret = seteuid(0);
2255
if(ret == -1){
2256
perror_plus("seteuid");
2257
}
2258
if(geteuid() == 0){
2259
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2260
if(ret == -1){
2261
perror_plus("ioctl SIOCGIFFLAGS");
2262
} else if(network.ifr_flags & IFF_UP){
2263
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2264
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2265
if(ret == -1){
2266
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2405
2267
}
2406
2268
}
2407
if(debug and (interfaces_to_take_down == NULL)){
2408
fprintf_plus(stderr, "No interfaces needed to be taken"
2409
" down\n");
2269
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2270
if(ret == -1){
2271
perror_plus("close");
2272
}
2273
/* Lower privileges permanently */
2274
errno = 0;
2275
ret = setuid(uid);
2276
if(ret == -1){
2277
perror_plus("setuid");
2410
2278
}
2411
2279
}
2412
2413
lower_privileges_permanently();
2414
2280
}
2415
2281
2416
free(interfaces_to_take_down);
2417
free(interfaces_hooks);
2418
2419
2282
/* Removes the GPGME temp directory and all files inside */
2420
2283
if(tempdir_created){
2421
2284
struct dirent **direntries = NULL;
2434
2297
}
2435
2298
ret = remove(fullname);
2436
2299
if(ret == -1){
2437
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2438
strerror(errno));
2300
fprintf(stderr, "Mandos plugin mandos-client: "
2301
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2439
2302
}
2440
2303
free(fullname);
2441
2304
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0