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237.22.1
(compared to revision 237.7.38)
: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2012-06-06 19:08:17 UTC
- mto: (237.7.144 trunk)
- mto: This revision was merged to the branch mainline in revision 302.
- Revision ID: teddy@recompile.se-20120606190817-c2x5o98vzn07xufd
* plugins.d/mandos-client.c: Refactoring.
(uid, gid): New global variables.
(raise_privileges, raise_privileges_permanently, lower_privileges,
bring_up_interface): New functions.
(main): Changed to use new functions.
(uid, gid): New global variables.
(raise_privileges, raise_privileges_permanently, lower_privileges,
bring_up_interface): New functions.
(main): Changed to use new functions.
- files added:
- 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 © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open() */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
88
91
89
92
#ifdef __linux__
90
93
#include <sys/klog.h> /* klogctl() */
108
111
init_gnutls_session(),
109
112
GNUTLS_* */
110
113
#include <gnutls/openpgp.h>
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
113
116
114
117
/* GPGME */
115
118
#include <gpgme.h> /* All GPGME types, constants and
123
126
#define PATHDIR "/conf/conf.d/mandos"
124
127
#define SECKEY "seckey.txt"
125
128
#define PUBKEY "pubkey.txt"
129
#define HOOKDIR "/lib/mandos/network-hooks.d"
126
130
127
131
bool debug = false;
128
132
static const char mandos_protocol_version[] = "1";
129
133
const char *argp_program_version = "mandos-client " VERSION;
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
131
135
static const char sys_class_net[] = "/sys/class/net";
132
136
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
uid_t uid = 65534;
139
gid_t gid = 65534;
133
140
134
141
/* Doubly linked list that need to be circularly linked when used */
135
142
typedef struct server{
165
172
166
173
/* Function to use when printing errors */
167
174
void perror_plus(const char *print_text){
175
int e = errno;
168
176
fprintf(stderr, "Mandos plugin %s: ",
169
177
program_invocation_short_name);
178
errno = e;
170
179
perror(print_text);
171
180
}
172
181
182
__attribute__((format (gnu_printf, 2, 3)))
183
int fprintf_plus(FILE *stream, const char *format, ...){
184
va_list ap;
185
va_start (ap, format);
186
187
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
188
program_invocation_short_name));
189
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
190
}
191
173
192
/*
174
193
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
194
* bytes. "buffer_capacity" is how much is currently allocated,
176
195
* "buffer_length" is how much is already used.
177
196
*/
178
197
size_t incbuffer(char **buffer, size_t buffer_length,
179
size_t buffer_capacity){
198
size_t buffer_capacity){
180
199
if(buffer_length + BUFFER_SIZE > buffer_capacity){
181
200
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
182
201
if(buffer == NULL){
187
206
return buffer_capacity;
188
207
}
189
208
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
209
/* Add server to set of servers to retry periodically */
210
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
211
int af){
193
212
int ret;
194
213
server *new_server = malloc(sizeof(server));
195
214
if(new_server == NULL){
196
215
perror_plus("malloc");
197
return -1;
216
return false;
198
217
}
199
218
*new_server = (server){ .ip = strdup(ip),
200
.port = port,
201
.if_index = if_index,
202
.af = af };
219
.port = port,
220
.if_index = if_index,
221
.af = af };
203
222
if(new_server->ip == NULL){
204
223
perror_plus("strdup");
205
return -1;
224
return false;
206
225
}
207
/* unique case of first server */
226
/* Special case of first server */
208
227
if (mc.current_server == NULL){
209
228
new_server->next = new_server;
210
229
new_server->prev = new_server;
211
230
mc.current_server = new_server;
212
/* Placing the new server last in the list */
231
/* Place the new server last in the list */
213
232
} else {
214
233
new_server->next = mc.current_server;
215
234
new_server->prev = mc.current_server->prev;
219
238
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
220
239
if(ret == -1){
221
240
perror_plus("clock_gettime");
222
return -1;
241
return false;
223
242
}
224
return 0;
243
return true;
225
244
}
226
245
227
246
/*
228
247
* Initialize GPGME.
229
248
*/
230
static bool init_gpgme(const char *seckey,
231
const char *pubkey, const char *tempdir){
249
static bool init_gpgme(const char *seckey, const char *pubkey,
250
const char *tempdir){
232
251
gpgme_error_t rc;
233
252
gpgme_engine_info_t engine_info;
234
253
249
268
250
269
rc = gpgme_data_new_from_fd(&pgp_data, fd);
251
270
if(rc != GPG_ERR_NO_ERROR){
252
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
253
gpgme_strsource(rc), gpgme_strerror(rc));
271
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
272
gpgme_strsource(rc), gpgme_strerror(rc));
254
273
return false;
255
274
}
256
275
257
276
rc = gpgme_op_import(mc.ctx, pgp_data);
258
277
if(rc != GPG_ERR_NO_ERROR){
259
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
260
gpgme_strsource(rc), gpgme_strerror(rc));
278
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
gpgme_strsource(rc), gpgme_strerror(rc));
261
280
return false;
262
281
}
263
282
270
289
}
271
290
272
291
if(debug){
273
fprintf(stderr, "Initializing GPGME\n");
292
fprintf_plus(stderr, "Initializing GPGME\n");
274
293
}
275
294
276
295
/* Init GPGME */
277
296
gpgme_check_version(NULL);
278
297
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
279
298
if(rc != GPG_ERR_NO_ERROR){
280
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
299
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
282
301
return false;
283
302
}
284
303
285
/* Set GPGME home directory for the OpenPGP engine only */
304
/* Set GPGME home directory for the OpenPGP engine only */
286
305
rc = gpgme_get_engine_info(&engine_info);
287
306
if(rc != GPG_ERR_NO_ERROR){
288
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
307
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
308
gpgme_strsource(rc), gpgme_strerror(rc));
290
309
return false;
291
310
}
292
311
while(engine_info != NULL){
298
317
engine_info = engine_info->next;
299
318
}
300
319
if(engine_info == NULL){
301
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
320
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
321
tempdir);
302
322
return false;
303
323
}
304
324
305
325
/* Create new GPGME "context" */
306
326
rc = gpgme_new(&(mc.ctx));
307
327
if(rc != GPG_ERR_NO_ERROR){
308
fprintf(stderr, "bad gpgme_new: %s: %s\n",
309
gpgme_strsource(rc), gpgme_strerror(rc));
328
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
330
gpgme_strerror(rc));
310
331
return false;
311
332
}
312
333
331
352
ssize_t plaintext_length = 0;
332
353
333
354
if(debug){
334
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
355
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
335
356
}
336
357
337
358
/* Create new GPGME data buffer from memory cryptotext */
338
359
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
339
360
0);
340
361
if(rc != GPG_ERR_NO_ERROR){
341
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
342
gpgme_strsource(rc), gpgme_strerror(rc));
362
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
363
gpgme_strsource(rc), gpgme_strerror(rc));
343
364
return -1;
344
365
}
345
366
346
367
/* Create new empty GPGME data buffer for the plaintext */
347
368
rc = gpgme_data_new(&dh_plain);
348
369
if(rc != GPG_ERR_NO_ERROR){
349
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
350
gpgme_strsource(rc), gpgme_strerror(rc));
370
fprintf_plus(stderr, "Mandos plugin mandos-client: "
371
"bad gpgme_data_new: %s: %s\n",
372
gpgme_strsource(rc), gpgme_strerror(rc));
351
373
gpgme_data_release(dh_crypto);
352
374
return -1;
353
375
}
356
378
data buffer */
357
379
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
358
380
if(rc != GPG_ERR_NO_ERROR){
359
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
381
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
382
gpgme_strsource(rc), gpgme_strerror(rc));
361
383
plaintext_length = -1;
362
384
if(debug){
363
385
gpgme_decrypt_result_t result;
364
386
result = gpgme_op_decrypt_result(mc.ctx);
365
387
if(result == NULL){
366
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
388
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
367
389
} else {
368
fprintf(stderr, "Unsupported algorithm: %s\n",
369
result->unsupported_algorithm);
370
fprintf(stderr, "Wrong key usage: %u\n",
371
result->wrong_key_usage);
390
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
391
result->unsupported_algorithm);
392
fprintf_plus(stderr, "Wrong key usage: %u\n",
393
result->wrong_key_usage);
372
394
if(result->file_name != NULL){
373
fprintf(stderr, "File name: %s\n", result->file_name);
395
fprintf_plus(stderr, "File name: %s\n", result->file_name);
374
396
}
375
397
gpgme_recipient_t recipient;
376
398
recipient = result->recipients;
377
399
while(recipient != NULL){
378
fprintf(stderr, "Public key algorithm: %s\n",
379
gpgme_pubkey_algo_name(recipient->pubkey_algo));
380
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
381
fprintf(stderr, "Secret key available: %s\n",
382
recipient->status == GPG_ERR_NO_SECKEY
383
? "No" : "Yes");
400
fprintf_plus(stderr, "Public key algorithm: %s\n",
401
gpgme_pubkey_algo_name
402
(recipient->pubkey_algo));
403
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
404
fprintf_plus(stderr, "Secret key available: %s\n",
405
recipient->status == GPG_ERR_NO_SECKEY
406
? "No" : "Yes");
384
407
recipient = recipient->next;
385
408
}
386
409
}
389
412
}
390
413
391
414
if(debug){
392
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
415
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
393
416
}
394
417
395
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
402
425
*plaintext = NULL;
403
426
while(true){
404
427
plaintext_capacity = incbuffer(plaintext,
405
(size_t)plaintext_length,
406
plaintext_capacity);
428
(size_t)plaintext_length,
429
plaintext_capacity);
407
430
if(plaintext_capacity == 0){
408
perror_plus("incbuffer");
409
plaintext_length = -1;
410
goto decrypt_end;
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
411
434
}
412
435
413
436
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
426
449
}
427
450
428
451
if(debug){
429
fprintf(stderr, "Decrypted password is: ");
452
fprintf_plus(stderr, "Decrypted password is: ");
430
453
for(ssize_t i = 0; i < plaintext_length; i++){
431
454
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
432
455
}
454
477
/* GnuTLS log function callback */
455
478
static void debuggnutls(__attribute__((unused)) int level,
456
479
const char* string){
457
fprintf(stderr, "GnuTLS: %s", string);
480
fprintf_plus(stderr, "GnuTLS: %s", string);
458
481
}
459
482
460
483
static int init_gnutls_global(const char *pubkeyfilename,
462
485
int ret;
463
486
464
487
if(debug){
465
fprintf(stderr, "Initializing GnuTLS\n");
488
fprintf_plus(stderr, "Initializing GnuTLS\n");
466
489
}
467
490
468
491
ret = gnutls_global_init();
469
492
if(ret != GNUTLS_E_SUCCESS){
470
fprintf(stderr, "GnuTLS global_init: %s\n",
471
safer_gnutls_strerror(ret));
493
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
494
safer_gnutls_strerror(ret));
472
495
return -1;
473
496
}
474
497
483
506
/* OpenPGP credentials */
484
507
ret = gnutls_certificate_allocate_credentials(&mc.cred);
485
508
if(ret != GNUTLS_E_SUCCESS){
486
fprintf(stderr, "GnuTLS memory error: %s\n",
487
safer_gnutls_strerror(ret));
509
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
510
safer_gnutls_strerror(ret));
488
511
gnutls_global_deinit();
489
512
return -1;
490
513
}
491
514
492
515
if(debug){
493
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
494
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
495
seckeyfilename);
516
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
517
" secret key %s as GnuTLS credentials\n",
518
pubkeyfilename,
519
seckeyfilename);
496
520
}
497
521
498
522
ret = gnutls_certificate_set_openpgp_key_file
499
523
(mc.cred, pubkeyfilename, seckeyfilename,
500
524
GNUTLS_OPENPGP_FMT_BASE64);
501
525
if(ret != GNUTLS_E_SUCCESS){
502
fprintf(stderr,
503
"Error[%d] while reading the OpenPGP key pair ('%s',"
504
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
505
fprintf(stderr, "The GnuTLS error is: %s\n",
506
safer_gnutls_strerror(ret));
526
fprintf_plus(stderr,
527
"Error[%d] while reading the OpenPGP key pair ('%s',"
528
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
529
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
530
safer_gnutls_strerror(ret));
507
531
goto globalfail;
508
532
}
509
533
510
534
/* GnuTLS server initialization */
511
535
ret = gnutls_dh_params_init(&mc.dh_params);
512
536
if(ret != GNUTLS_E_SUCCESS){
513
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
514
" %s\n", safer_gnutls_strerror(ret));
537
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
538
" initialization: %s\n",
539
safer_gnutls_strerror(ret));
515
540
goto globalfail;
516
541
}
517
542
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
518
543
if(ret != GNUTLS_E_SUCCESS){
519
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
520
safer_gnutls_strerror(ret));
544
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
545
safer_gnutls_strerror(ret));
521
546
goto globalfail;
522
547
}
523
548
543
568
}
544
569
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
545
570
if(ret != GNUTLS_E_SUCCESS){
546
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
547
safer_gnutls_strerror(ret));
571
fprintf_plus(stderr,
572
"Error in GnuTLS session initialization: %s\n",
573
safer_gnutls_strerror(ret));
548
574
}
549
575
550
576
{
557
583
}
558
584
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
559
585
if(ret != GNUTLS_E_SUCCESS){
560
fprintf(stderr, "Syntax error at: %s\n", err);
561
fprintf(stderr, "GnuTLS error: %s\n",
562
safer_gnutls_strerror(ret));
586
fprintf_plus(stderr, "Syntax error at: %s\n", err);
587
fprintf_plus(stderr, "GnuTLS error: %s\n",
588
safer_gnutls_strerror(ret));
563
589
gnutls_deinit(*session);
564
590
return -1;
565
591
}
574
600
}
575
601
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
576
602
if(ret != GNUTLS_E_SUCCESS){
577
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
578
safer_gnutls_strerror(ret));
603
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
604
safer_gnutls_strerror(ret));
579
605
gnutls_deinit(*session);
580
606
return -1;
581
607
}
626
652
pf = PF_INET;
627
653
break;
628
654
default:
629
fprintf(stderr, "Bad address family: %d\n", af);
655
fprintf_plus(stderr, "Bad address family: %d\n", af);
630
656
errno = EINVAL;
631
657
return -1;
632
658
}
637
663
}
638
664
639
665
if(debug){
640
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
641
"\n", ip, port);
666
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
667
PRIu16 "\n", ip, port);
642
668
}
643
669
644
670
tcp_sd = socket(pf, SOCK_STREAM, 0);
670
696
}
671
697
if(ret == 0){
672
698
int e = errno;
673
fprintf(stderr, "Bad address: %s\n", ip);
699
fprintf_plus(stderr, "Bad address: %s\n", ip);
674
700
errno = e;
675
701
goto mandos_end;
676
702
}
681
707
682
708
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
683
709
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
684
-Wunreachable-code*/
710
-Wunreachable-code*/
685
711
if(if_index == AVAHI_IF_UNSPEC){
686
fprintf(stderr, "An IPv6 link-local address is incomplete"
687
" without a network interface\n");
712
fprintf_plus(stderr, "An IPv6 link-local address is"
713
" incomplete without a network interface\n");
688
714
errno = EINVAL;
689
715
goto mandos_end;
690
716
}
708
734
if(if_indextoname((unsigned int)if_index, interface) == NULL){
709
735
perror_plus("if_indextoname");
710
736
} else {
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
ip, interface, port);
737
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
738
"\n", ip, interface, port);
713
739
}
714
740
} else {
715
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
716
port);
741
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
742
ip, port);
717
743
}
718
744
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
719
745
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
729
755
perror_plus("inet_ntop");
730
756
} else {
731
757
if(strcmp(addrstr, ip) != 0){
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
758
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
733
759
}
734
760
}
735
761
}
763
789
while(true){
764
790
size_t out_size = strlen(out);
765
791
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
766
out_size - written));
792
out_size - written));
767
793
if(ret == -1){
768
794
int e = errno;
769
795
perror_plus("write");
789
815
}
790
816
791
817
if(debug){
792
fprintf(stderr, "Establishing TLS session with %s\n", ip);
818
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
793
819
}
794
820
795
821
if(quit_now){
797
823
goto mandos_end;
798
824
}
799
825
800
/* Spurious warning from -Wint-to-pointer-cast */
801
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
826
/* This casting via intptr_t is to eliminate warning about casting
827
an int to a pointer type. This is exactly how the GnuTLS Guile
828
function "set-session-transport-fd!" does it. */
829
gnutls_transport_set_ptr(session,
830
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
802
831
803
832
if(quit_now){
804
833
errno = EINTR;
815
844
816
845
if(ret != GNUTLS_E_SUCCESS){
817
846
if(debug){
818
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
847
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
819
848
gnutls_perror(ret);
820
849
}
821
850
errno = EPROTO;
825
854
/* Read OpenPGP packet that contains the wanted password */
826
855
827
856
if(debug){
828
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
829
ip);
857
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
858
" %s\n", ip);
830
859
}
831
860
832
861
while(true){
837
866
}
838
867
839
868
buffer_capacity = incbuffer(&buffer, buffer_length,
840
buffer_capacity);
869
buffer_capacity);
841
870
if(buffer_capacity == 0){
842
871
int e = errno;
843
872
perror_plus("incbuffer");
870
899
}
871
900
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
872
901
if(ret < 0){
873
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
902
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
903
"***\n");
874
904
gnutls_perror(ret);
875
905
errno = EPROTO;
876
906
goto mandos_end;
877
907
}
878
908
break;
879
909
default:
880
fprintf(stderr, "Unknown error while reading data from"
881
" encrypted session with Mandos server\n");
910
fprintf_plus(stderr, "Unknown error while reading data from"
911
" encrypted session with Mandos server\n");
882
912
gnutls_bye(session, GNUTLS_SHUT_RDWR);
883
913
errno = EIO;
884
914
goto mandos_end;
889
919
}
890
920
891
921
if(debug){
892
fprintf(stderr, "Closing TLS session\n");
922
fprintf_plus(stderr, "Closing TLS session\n");
893
923
}
894
924
895
925
if(quit_now){
907
937
908
938
if(buffer_length > 0){
909
939
ssize_t decrypted_buffer_size;
910
decrypted_buffer_size = pgp_packet_decrypt(buffer,
911
buffer_length,
940
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
912
941
&decrypted_buffer);
913
942
if(decrypted_buffer_size >= 0){
914
943
925
954
if(ret == 0 and ferror(stdout)){
926
955
int e = errno;
927
956
if(debug){
928
fprintf(stderr, "Error writing encrypted data: %s\n",
929
strerror(errno));
957
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
958
strerror(errno));
930
959
}
931
960
errno = e;
932
961
goto mandos_end;
989
1018
switch(event){
990
1019
default:
991
1020
case AVAHI_RESOLVER_FAILURE:
992
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
993
" of type '%s' in domain '%s': %s\n", name, type, domain,
994
avahi_strerror(avahi_server_errno(mc.server)));
1021
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1022
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1023
domain,
1024
avahi_strerror(avahi_server_errno(mc.server)));
995
1025
break;
996
1026
997
1027
case AVAHI_RESOLVER_FOUND:
999
1029
char ip[AVAHI_ADDRESS_STR_MAX];
1000
1030
avahi_address_snprint(ip, sizeof(ip), address);
1001
1031
if(debug){
1002
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1003
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1004
ip, (intmax_t)interface, port);
1032
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1033
PRIdMAX ") on port %" PRIu16 "\n", name,
1034
host_name, ip, (intmax_t)interface, port);
1005
1035
}
1006
1036
int ret = start_mandos_communication(ip, port, interface,
1007
1037
avahi_proto_to_af(proto));
1008
1038
if(ret == 0){
1009
1039
avahi_simple_poll_quit(mc.simple_poll);
1010
1040
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
1041
if(not add_server(ip, port, interface,
1042
avahi_proto_to_af(proto))){
1043
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1044
" list\n", name);
1045
}
1013
1046
}
1014
1047
}
1015
1048
}
1039
1072
default:
1040
1073
case AVAHI_BROWSER_FAILURE:
1041
1074
1042
fprintf(stderr, "(Avahi browser) %s\n",
1043
avahi_strerror(avahi_server_errno(mc.server)));
1075
fprintf_plus(stderr, "(Avahi browser) %s\n",
1076
avahi_strerror(avahi_server_errno(mc.server)));
1044
1077
avahi_simple_poll_quit(mc.simple_poll);
1045
1078
return;
1046
1079
1053
1086
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1054
1087
name, type, domain, protocol, 0,
1055
1088
resolve_callback, NULL) == NULL)
1056
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1057
name, avahi_strerror(avahi_server_errno(mc.server)));
1089
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1090
" %s\n", name,
1091
avahi_strerror(avahi_server_errno(mc.server)));
1058
1092
break;
1059
1093
1060
1094
case AVAHI_BROWSER_REMOVE:
1063
1097
case AVAHI_BROWSER_ALL_FOR_NOW:
1064
1098
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1065
1099
if(debug){
1066
fprintf(stderr, "No Mandos server found, still searching...\n");
1100
fprintf_plus(stderr, "No Mandos server found, still"
1101
" searching...\n");
1067
1102
}
1068
1103
break;
1069
1104
}
1084
1119
errno = old_errno;
1085
1120
}
1086
1121
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1122
bool get_flags(const char *ifname, struct ifreq *ifr){
1123
int ret;
1124
1125
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1126
if(s < 0){
1127
perror_plus("socket");
1128
return false;
1129
}
1130
strcpy(ifr->ifr_name, ifname);
1131
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1132
if(ret == -1){
1143
1133
if(debug){
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1134
perror_plus("ioctl SIOCGIFFLAGS");
1146
1135
}
1147
free(flagstring);
1148
return 0;
1136
return false;
1149
1137
}
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1138
return true;
1139
}
1140
1141
bool good_flags(const char *ifname, const struct ifreq *ifr){
1142
1152
1143
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1144
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
1145
if(debug){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1146
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1147
ifname);
1157
1148
}
1158
return 0;
1149
return false;
1159
1150
}
1160
1151
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1152
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
1153
if(debug){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1154
fprintf_plus(stderr, "Accepting point-to-point interface"
1155
" \"%s\"\n", ifname);
1165
1156
}
1166
return 1;
1157
return true;
1167
1158
}
1168
1159
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1160
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
1161
if(debug){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1162
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1163
" \"%s\"\n", ifname);
1173
1164
}
1174
return 0;
1165
return false;
1175
1166
}
1176
1167
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1168
if(ifr->ifr_flags & IFF_NOARP){
1178
1169
if(debug){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1170
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1171
ifname);
1181
1172
}
1182
return 0;
1173
return false;
1183
1174
}
1175
1184
1176
/* Accept this device */
1185
1177
if(debug){
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1178
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1179
}
1180
return true;
1181
}
1182
1183
/*
1184
* This function determines if a directory entry in /sys/class/net
1185
* corresponds to an acceptable network device.
1186
* (This function is passed to scandir(3) as a filter function.)
1187
*/
1188
int good_interface(const struct dirent *if_entry){
1189
if(if_entry->d_name[0] == '.'){
1190
return 0;
1191
}
1192
1193
struct ifreq ifr;
1194
if(not get_flags(if_entry->d_name, &ifr)){
1195
if(debug){
1196
fprintf_plus(stderr, "Failed to get flags for interface "
1197
"\"%s\"\n", if_entry->d_name);
1198
}
1199
return 0;
1200
}
1201
1202
if(not good_flags(if_entry->d_name, &ifr)){
1203
return 0;
1204
}
1205
return 1;
1206
}
1207
1208
/*
1209
* This function determines if a directory entry in /sys/class/net
1210
* corresponds to an acceptable network device which is up.
1211
* (This function is passed to scandir(3) as a filter function.)
1212
*/
1213
int up_interface(const struct dirent *if_entry){
1214
if(if_entry->d_name[0] == '.'){
1215
return 0;
1216
}
1217
1218
struct ifreq ifr;
1219
if(not get_flags(if_entry->d_name, &ifr)){
1220
if(debug){
1221
fprintf_plus(stderr, "Failed to get flags for interface "
1222
"\"%s\"\n", if_entry->d_name);
1223
}
1224
return 0;
1225
}
1226
1227
/* Reject down interfaces */
1228
if(not (ifr.ifr_flags & IFF_UP)){
1229
if(debug){
1230
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1231
if_entry->d_name);
1232
}
1233
return 0;
1234
}
1235
1236
/* Reject non-running interfaces */
1237
if(not (ifr.ifr_flags & IFF_RUNNING)){
1238
if(debug){
1239
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1240
if_entry->d_name);
1241
}
1242
return 0;
1243
}
1244
1245
if(not good_flags(if_entry->d_name, &ifr)){
1246
return 0;
1188
1247
}
1189
1248
return 1;
1190
1249
}
1200
1259
return 1;
1201
1260
}
1202
1261
1262
/* Is this directory entry a runnable program? */
1263
int runnable_hook(const struct dirent *direntry){
1264
int ret;
1265
size_t sret;
1266
struct stat st;
1267
1268
if((direntry->d_name)[0] == '\0'){
1269
/* Empty name? */
1270
return 0;
1271
}
1272
1273
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1274
"abcdefghijklmnopqrstuvwxyz"
1275
"0123456789"
1276
"_-");
1277
if((direntry->d_name)[sret] != '\0'){
1278
/* Contains non-allowed characters */
1279
if(debug){
1280
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1281
direntry->d_name);
1282
}
1283
return 0;
1284
}
1285
1286
char *fullname = NULL;
1287
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1288
if(ret < 0){
1289
perror_plus("asprintf");
1290
return 0;
1291
}
1292
1293
ret = stat(fullname, &st);
1294
if(ret == -1){
1295
if(debug){
1296
perror_plus("Could not stat hook");
1297
}
1298
return 0;
1299
}
1300
if(not (S_ISREG(st.st_mode))){
1301
/* Not a regular file */
1302
if(debug){
1303
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1304
direntry->d_name);
1305
}
1306
return 0;
1307
}
1308
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1309
/* Not executable */
1310
if(debug){
1311
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1312
direntry->d_name);
1313
}
1314
return 0;
1315
}
1316
if(debug){
1317
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1318
direntry->d_name);
1319
}
1320
return 1;
1321
}
1322
1203
1323
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1204
1324
int ret;
1205
1325
struct timespec now;
1206
1326
struct timespec waited_time;
1207
1327
intmax_t block_time;
1208
1328
1209
1329
while(true){
1210
1330
if(mc.current_server == NULL){
1211
1331
if (debug){
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1332
fprintf_plus(stderr, "Wait until first server is found."
1333
" No timeout!\n");
1214
1334
}
1215
1335
ret = avahi_simple_poll_iterate(s, -1);
1216
1336
} else {
1217
1337
if (debug){
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1338
fprintf_plus(stderr, "Check current_server if we should run"
1339
" it, or wait\n");
1220
1340
}
1221
1341
/* the current time */
1222
1342
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1236
1356
block_time = ((retry_interval
1237
1357
- ((intmax_t)waited_time.tv_sec * 1000))
1238
1358
- ((intmax_t)waited_time.tv_nsec / 1000000));
1239
1359
1240
1360
if (debug){
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1361
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1362
block_time);
1242
1363
}
1243
1364
1244
1365
if(block_time <= 0){
1245
1366
ret = start_mandos_communication(mc.current_server->ip,
1246
1367
mc.current_server->port,
1264
1385
ret = avahi_simple_poll_iterate(s, (int)block_time);
1265
1386
}
1266
1387
if(ret != 0){
1267
if (ret > 0 or errno != EINTR) {
1388
if (ret > 0 or errno != EINTR){
1268
1389
return (ret != 1) ? ret : 0;
1269
1390
}
1270
1391
}
1271
1392
}
1272
1393
}
1273
1394
1395
/* Set effective uid to 0, return errno */
1396
int raise_privileges(void){
1397
int old_errno = errno;
1398
int ret_errno = 0;
1399
errno = 0;
1400
if(seteuid(0) == -1){
1401
perror_plus("seteuid");
1402
}
1403
ret_errno = errno;
1404
errno = old_errno;
1405
return ret_errno;
1406
}
1407
1408
/* Set effective and real user ID to 0. Return errno. */
1409
int raise_privileges_permanently(void){
1410
int old_errno = errno;
1411
int ret_errno = raise_privileges();
1412
if(ret_errno != 0){
1413
errno = old_errno;
1414
return ret_errno;
1415
}
1416
errno = 0;
1417
if(setuid(0) == -1){
1418
perror_plus("seteuid");
1419
}
1420
ret_errno = errno;
1421
errno = old_errno;
1422
return ret_errno;
1423
}
1424
1425
/* Set effective user ID to unprivileged saved user ID */
1426
int lower_privileges(void){
1427
int old_errno = errno;
1428
int ret_errno = 0;
1429
errno = 0;
1430
if(seteuid(uid) == -1){
1431
perror_plus("seteuid");
1432
}
1433
ret_errno = errno;
1434
errno = old_errno;
1435
return ret_errno;
1436
}
1437
1438
bool run_network_hooks(const char *mode, const char *interface,
1439
const float delay){
1440
struct dirent **direntries;
1441
struct dirent *direntry;
1442
int ret;
1443
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1444
alphasort);
1445
if(numhooks == -1){
1446
perror_plus("scandir");
1447
} else {
1448
int devnull = open("/dev/null", O_RDONLY);
1449
for(int i = 0; i < numhooks; i++){
1450
direntry = direntries[i];
1451
char *fullname = NULL;
1452
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1453
if(ret < 0){
1454
perror_plus("asprintf");
1455
continue;
1456
}
1457
if(debug){
1458
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1459
direntry->d_name);
1460
}
1461
pid_t hook_pid = fork();
1462
if(hook_pid == 0){
1463
/* Child */
1464
/* Raise privileges */
1465
raise_privileges_permanently();
1466
/* Set group */
1467
errno = 0;
1468
ret = setgid(0);
1469
if(ret == -1){
1470
perror_plus("setgid");
1471
}
1472
/* Reset supplementary groups */
1473
errno = 0;
1474
ret = setgroups(0, NULL);
1475
if(ret == -1){
1476
perror_plus("setgroups");
1477
}
1478
dup2(devnull, STDIN_FILENO);
1479
close(devnull);
1480
dup2(STDERR_FILENO, STDOUT_FILENO);
1481
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1482
if(ret == -1){
1483
perror_plus("setenv");
1484
_exit(EX_OSERR);
1485
}
1486
ret = setenv("DEVICE", interface, 1);
1487
if(ret == -1){
1488
perror_plus("setenv");
1489
_exit(EX_OSERR);
1490
}
1491
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1492
if(ret == -1){
1493
perror_plus("setenv");
1494
_exit(EX_OSERR);
1495
}
1496
ret = setenv("MODE", mode, 1);
1497
if(ret == -1){
1498
perror_plus("setenv");
1499
_exit(EX_OSERR);
1500
}
1501
char *delaystring;
1502
ret = asprintf(&delaystring, "%f", delay);
1503
if(ret == -1){
1504
perror_plus("asprintf");
1505
_exit(EX_OSERR);
1506
}
1507
ret = setenv("DELAY", delaystring, 1);
1508
if(ret == -1){
1509
free(delaystring);
1510
perror_plus("setenv");
1511
_exit(EX_OSERR);
1512
}
1513
free(delaystring);
1514
if(connect_to != NULL){
1515
ret = setenv("CONNECT", connect_to, 1);
1516
if(ret == -1){
1517
perror_plus("setenv");
1518
_exit(EX_OSERR);
1519
}
1520
}
1521
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1522
perror_plus("execl");
1523
_exit(EXIT_FAILURE);
1524
}
1525
} else {
1526
int status;
1527
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1528
perror_plus("waitpid");
1529
free(fullname);
1530
continue;
1531
}
1532
if(WIFEXITED(status)){
1533
if(WEXITSTATUS(status) != 0){
1534
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1535
" with status %d\n", direntry->d_name,
1536
WEXITSTATUS(status));
1537
free(fullname);
1538
continue;
1539
}
1540
} else if(WIFSIGNALED(status)){
1541
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1542
" signal %d\n", direntry->d_name,
1543
WTERMSIG(status));
1544
free(fullname);
1545
continue;
1546
} else {
1547
fprintf_plus(stderr, "Warning: network hook \"%s\""
1548
" crashed\n", direntry->d_name);
1549
free(fullname);
1550
continue;
1551
}
1552
}
1553
free(fullname);
1554
if(debug){
1555
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1556
direntry->d_name);
1557
}
1558
}
1559
close(devnull);
1560
}
1561
return true;
1562
}
1563
1564
int bring_up_interface(const char * const interface, const float delay){
1565
int sd = -1;
1566
int ret;
1567
struct ifreq network;
1568
AvahiIfIndex if_index = (AvahiIfIndex)if_nametoindex(interface);
1569
if(if_index == 0){
1570
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1571
return EX_UNAVAILABLE;
1572
}
1573
1574
if(quit_now){
1575
return EINTR;
1576
}
1577
1578
/* Re-raise priviliges */
1579
raise_privileges();
1580
1581
#ifdef __linux__
1582
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1583
messages about the network interface to mess up the prompt */
1584
ret = klogctl(8, NULL, 5);
1585
bool restore_loglevel = true;
1586
if(ret == -1){
1587
restore_loglevel = false;
1588
perror_plus("klogctl");
1589
}
1590
#endif /* __linux__ */
1591
1592
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1593
if(sd < 0){
1594
perror_plus("socket");
1595
#ifdef __linux__
1596
if(restore_loglevel){
1597
ret = klogctl(7, NULL, 0);
1598
if(ret == -1){
1599
perror_plus("klogctl");
1600
}
1601
}
1602
#endif /* __linux__ */
1603
/* Lower privileges */
1604
lower_privileges();
1605
return EX_OSERR;
1606
;
1607
}
1608
strcpy(network.ifr_name, interface);
1609
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1610
if(ret == -1){
1611
perror_plus("ioctl SIOCGIFFLAGS");
1612
#ifdef __linux__
1613
if(restore_loglevel){
1614
ret = klogctl(7, NULL, 0);
1615
if(ret == -1){
1616
perror_plus("klogctl");
1617
}
1618
}
1619
#endif /* __linux__ */
1620
/* Lower privileges */
1621
lower_privileges();
1622
return EX_OSERR;
1623
}
1624
if((network.ifr_flags & IFF_UP) == 0){
1625
network.ifr_flags |= IFF_UP;
1626
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1627
if(ret == -1){
1628
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1629
#ifdef __linux__
1630
if(restore_loglevel){
1631
ret = klogctl(7, NULL, 0);
1632
if(ret == -1){
1633
perror_plus("klogctl");
1634
}
1635
}
1636
#endif /* __linux__ */
1637
/* Lower privileges */
1638
lower_privileges();
1639
return EX_OSERR;
1640
}
1641
}
1642
/* Sleep checking until interface is running.
1643
Check every 0.25s, up to total time of delay */
1644
for(int i=0; i < delay * 4; i++){
1645
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1646
if(ret == -1){
1647
perror_plus("ioctl SIOCGIFFLAGS");
1648
} else if(network.ifr_flags & IFF_RUNNING){
1649
break;
1650
}
1651
struct timespec sleeptime = { .tv_nsec = 250000000 };
1652
ret = nanosleep(&sleeptime, NULL);
1653
if(ret == -1 and errno != EINTR){
1654
perror_plus("nanosleep");
1655
}
1656
}
1657
/* Close the socket */
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1659
if(ret == -1){
1660
perror_plus("close");
1661
}
1662
#ifdef __linux__
1663
if(restore_loglevel){
1664
/* Restores kernel loglevel to default */
1665
ret = klogctl(7, NULL, 0);
1666
if(ret == -1){
1667
perror_plus("klogctl");
1668
}
1669
}
1670
#endif /* __linux__ */
1671
/* Lower privileges */
1672
lower_privileges();
1673
return errno;
1674
}
1675
1274
1676
int main(int argc, char *argv[]){
1275
1677
AvahiSServiceBrowser *sb = NULL;
1276
1678
int error;
1282
1684
struct ifreq network;
1283
1685
int sd = -1;
1284
1686
bool take_down_interface = false;
1285
uid_t uid;
1286
gid_t gid;
1287
1687
char tempdir[] = "/tmp/mandosXXXXXX";
1288
1688
bool tempdir_created = false;
1289
1689
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1356
1756
.group = 2 },
1357
1757
{ .name = "retry", .key = 132,
1358
1758
.arg = "SECONDS",
1359
.doc = "Retry interval used when denied by the mandos server",
1759
.doc = "Retry interval used when denied by the Mandos server",
1760
.group = 2 },
1761
{ .name = "network-hook-dir", .key = 133,
1762
.arg = "DIR",
1763
.doc = "Directory where network hooks are located",
1360
1764
.group = 2 },
1361
1765
/*
1362
1766
* These reproduce what we would get without ARGP_NO_HELP
1411
1815
errno = 0;
1412
1816
retry_interval = strtod(arg, &tmp);
1413
1817
if(errno != 0 or tmp == arg or *tmp != '\0'
1414
or (retry_interval * 1000) > INT_MAX){
1818
or (retry_interval * 1000) > INT_MAX
1819
or retry_interval < 0){
1415
1820
argp_error(state, "Bad retry interval");
1416
1821
}
1417
1822
break;
1823
case 133: /* --network-hook-dir */
1824
hookdir = arg;
1825
break;
1418
1826
/*
1419
1827
* These reproduce what we would get without ARGP_NO_HELP
1420
1828
*/
1426
1834
argp_state_help(state, state->out_stream,
1427
1835
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1428
1836
case 'V': /* --version */
1429
fprintf(state->out_stream, "%s\n", argp_program_version);
1837
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1430
1838
exit(argp_err_exit_status);
1431
1839
break;
1432
1840
default:
1459
1867
{
1460
1868
/* Work around Debian bug #633582:
1461
1869
<http://bugs.debian.org/633582> */
1462
struct stat st;
1463
1870
1464
1871
/* Re-raise priviliges */
1465
errno = 0;
1466
ret = seteuid(0);
1467
if(ret == -1){
1468
perror_plus("seteuid");
1469
}
1470
1471
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1472
if(seckey_fd == -1){
1473
perror_plus("open");
1474
} else {
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1476
if(ret == -1){
1477
perror_plus("fstat");
1478
} else {
1479
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1480
ret = fchown(seckey_fd, uid, gid);
1481
if(ret == -1){
1482
perror_plus("fchown");
1483
}
1484
}
1485
}
1486
TEMP_FAILURE_RETRY(close(seckey_fd));
1487
}
1488
1489
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1490
if(pubkey_fd == -1){
1491
perror_plus("open");
1492
} else {
1493
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1494
if(ret == -1){
1495
perror_plus("fstat");
1496
} else {
1497
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1498
ret = fchown(pubkey_fd, uid, gid);
1499
if(ret == -1){
1500
perror_plus("fchown");
1501
}
1502
}
1503
}
1504
TEMP_FAILURE_RETRY(close(pubkey_fd));
1505
}
1506
1507
/* Lower privileges */
1508
errno = 0;
1509
ret = seteuid(uid);
1510
if(ret == -1){
1511
perror_plus("seteuid");
1512
}
1872
if(raise_privileges() == 0){
1873
struct stat st;
1874
1875
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1876
int seckey_fd = open(seckey, O_RDONLY);
1877
if(seckey_fd == -1){
1878
perror_plus("open");
1879
} else {
1880
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1881
if(ret == -1){
1882
perror_plus("fstat");
1883
} else {
1884
if(S_ISREG(st.st_mode)
1885
and st.st_uid == 0 and st.st_gid == 0){
1886
ret = fchown(seckey_fd, uid, gid);
1887
if(ret == -1){
1888
perror_plus("fchown");
1889
}
1890
}
1891
}
1892
TEMP_FAILURE_RETRY(close(seckey_fd));
1893
}
1894
}
1895
1896
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1897
int pubkey_fd = open(pubkey, O_RDONLY);
1898
if(pubkey_fd == -1){
1899
perror_plus("open");
1900
} else {
1901
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1902
if(ret == -1){
1903
perror_plus("fstat");
1904
} else {
1905
if(S_ISREG(st.st_mode)
1906
and st.st_uid == 0 and st.st_gid == 0){
1907
ret = fchown(pubkey_fd, uid, gid);
1908
if(ret == -1){
1909
perror_plus("fchown");
1910
}
1911
}
1912
}
1913
TEMP_FAILURE_RETRY(close(pubkey_fd));
1914
}
1915
}
1916
1917
/* Lower privileges */
1918
errno = 0;
1919
ret = seteuid(uid);
1920
if(ret == -1){
1921
perror_plus("seteuid");
1922
}
1923
}
1924
}
1925
1926
/* Run network hooks */
1927
if(not run_network_hooks("start", interface, delay)){
1928
goto end;
1513
1929
}
1514
1930
1515
1931
if(not debug){
1516
1932
avahi_set_log_function(empty_log);
1517
1933
}
1518
1934
1519
1935
if(interface[0] == '\0'){
1520
1936
struct dirent **direntries;
1521
ret = scandir(sys_class_net, &direntries, good_interface,
1937
/* First look for interfaces that are up */
1938
ret = scandir(sys_class_net, &direntries, up_interface,
1522
1939
alphasort);
1940
if(ret == 0){
1941
/* No up interfaces, look for any good interfaces */
1942
free(direntries);
1943
ret = scandir(sys_class_net, &direntries, good_interface,
1944
alphasort);
1945
}
1523
1946
if(ret >= 1){
1524
/* Pick the first good interface */
1947
/* Pick the first interface returned */
1525
1948
interface = strdup(direntries[0]->d_name);
1526
1949
if(debug){
1527
fprintf(stderr, "Using interface \"%s\"\n", interface);
1950
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1528
1951
}
1529
1952
if(interface == NULL){
1530
1953
perror_plus("malloc");
1535
1958
free(direntries);
1536
1959
} else {
1537
1960
free(direntries);
1538
fprintf(stderr, "Could not find a network interface\n");
1961
fprintf_plus(stderr, "Could not find a network interface\n");
1539
1962
exitcode = EXIT_FAILURE;
1540
1963
goto end;
1541
1964
}
1547
1970
srand((unsigned int) time(NULL));
1548
1971
mc.simple_poll = avahi_simple_poll_new();
1549
1972
if(mc.simple_poll == NULL){
1550
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1973
fprintf_plus(stderr,
1974
"Avahi: Failed to create simple poll object.\n");
1551
1975
exitcode = EX_UNAVAILABLE;
1552
1976
goto end;
1553
1977
}
1616
2040
}
1617
2041
1618
2042
/* If the interface is down, bring it up */
1619
if(strcmp(interface, "none") != 0){
1620
if_index = (AvahiIfIndex) if_nametoindex(interface);
1621
if(if_index == 0){
1622
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1623
exitcode = EX_UNAVAILABLE;
1624
goto end;
1625
}
1626
1627
if(quit_now){
1628
goto end;
1629
}
1630
1631
/* Re-raise priviliges */
1632
errno = 0;
1633
ret = seteuid(0);
1634
if(ret == -1){
1635
perror_plus("seteuid");
1636
}
1637
1638
#ifdef __linux__
1639
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1640
messages about the network interface to mess up the prompt */
1641
ret = klogctl(8, NULL, 5);
1642
bool restore_loglevel = true;
1643
if(ret == -1){
1644
restore_loglevel = false;
1645
perror_plus("klogctl");
1646
}
1647
#endif /* __linux__ */
1648
1649
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1650
if(sd < 0){
1651
perror_plus("socket");
1652
exitcode = EX_OSERR;
1653
#ifdef __linux__
1654
if(restore_loglevel){
1655
ret = klogctl(7, NULL, 0);
1656
if(ret == -1){
1657
perror_plus("klogctl");
1658
}
1659
}
1660
#endif /* __linux__ */
1661
/* Lower privileges */
1662
errno = 0;
1663
ret = seteuid(uid);
1664
if(ret == -1){
1665
perror_plus("seteuid");
1666
}
1667
goto end;
1668
}
1669
strcpy(network.ifr_name, interface);
1670
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1671
if(ret == -1){
1672
perror_plus("ioctl SIOCGIFFLAGS");
1673
#ifdef __linux__
1674
if(restore_loglevel){
1675
ret = klogctl(7, NULL, 0);
1676
if(ret == -1){
1677
perror_plus("klogctl");
1678
}
1679
}
1680
#endif /* __linux__ */
1681
exitcode = EX_OSERR;
1682
/* Lower privileges */
1683
errno = 0;
1684
ret = seteuid(uid);
1685
if(ret == -1){
1686
perror_plus("seteuid");
1687
}
1688
goto end;
1689
}
1690
if((network.ifr_flags & IFF_UP) == 0){
1691
network.ifr_flags |= IFF_UP;
1692
take_down_interface = true;
1693
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1694
if(ret == -1){
1695
take_down_interface = false;
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1697
exitcode = EX_OSERR;
1698
#ifdef __linux__
1699
if(restore_loglevel){
1700
ret = klogctl(7, NULL, 0);
1701
if(ret == -1){
1702
perror_plus("klogctl");
1703
}
1704
}
1705
#endif /* __linux__ */
1706
/* Lower privileges */
1707
errno = 0;
1708
ret = seteuid(uid);
1709
if(ret == -1){
1710
perror_plus("seteuid");
1711
}
1712
goto end;
1713
}
1714
}
1715
/* Sleep checking until interface is running.
1716
Check every 0.25s, up to total time of delay */
1717
for(int i=0; i < delay * 4; i++){
1718
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1719
if(ret == -1){
1720
perror_plus("ioctl SIOCGIFFLAGS");
1721
} else if(network.ifr_flags & IFF_RUNNING){
1722
break;
1723
}
1724
struct timespec sleeptime = { .tv_nsec = 250000000 };
1725
ret = nanosleep(&sleeptime, NULL);
1726
if(ret == -1 and errno != EINTR){
1727
perror_plus("nanosleep");
1728
}
1729
}
1730
if(not take_down_interface){
1731
/* We won't need the socket anymore */
1732
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1733
if(ret == -1){
1734
perror_plus("close");
1735
}
1736
}
1737
#ifdef __linux__
1738
if(restore_loglevel){
1739
/* Restores kernel loglevel to default */
1740
ret = klogctl(7, NULL, 0);
1741
if(ret == -1){
1742
perror_plus("klogctl");
1743
}
1744
}
1745
#endif /* __linux__ */
1746
/* Lower privileges */
1747
errno = 0;
1748
if(take_down_interface){
1749
/* Lower privileges */
1750
ret = seteuid(uid);
1751
if(ret == -1){
1752
perror_plus("seteuid");
1753
}
1754
} else {
1755
/* Lower privileges permanently */
1756
ret = setuid(uid);
1757
if(ret == -1){
1758
perror_plus("setuid");
1759
}
2043
if((interface[0] != '\0') and (strcmp(interface, "none") != 0)){
2044
ret = bring_up_interface(interface, delay);
2045
if(ret){
2046
errno = ret;
2047
perror_plus("Failed to bring up interface");
1760
2048
}
1761
2049
}
1762
2050
1766
2054
1767
2055
ret = init_gnutls_global(pubkey, seckey);
1768
2056
if(ret == -1){
1769
fprintf(stderr, "init_gnutls_global failed\n");
2057
fprintf_plus(stderr, "init_gnutls_global failed\n");
1770
2058
exitcode = EX_UNAVAILABLE;
1771
2059
goto end;
1772
2060
} else {
1788
2076
}
1789
2077
1790
2078
if(not init_gpgme(pubkey, seckey, tempdir)){
1791
fprintf(stderr, "init_gpgme failed\n");
2079
fprintf_plus(stderr, "init_gpgme failed\n");
1792
2080
exitcode = EX_UNAVAILABLE;
1793
2081
goto end;
1794
2082
} else {
1803
2091
/* Connect directly, do not use Zeroconf */
1804
2092
/* (Mainly meant for debugging) */
1805
2093
char *address = strrchr(connect_to, ':');
2094
1806
2095
if(address == NULL){
1807
fprintf(stderr, "No colon in address\n");
2096
fprintf_plus(stderr, "No colon in address\n");
1808
2097
exitcode = EX_USAGE;
1809
2098
goto end;
1810
2099
}
1818
2107
tmpmax = strtoimax(address+1, &tmp, 10);
1819
2108
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1820
2109
or tmpmax != (uint16_t)tmpmax){
1821
fprintf(stderr, "Bad port number\n");
2110
fprintf_plus(stderr, "Bad port number\n");
1822
2111
exitcode = EX_USAGE;
1823
2112
goto end;
1824
2113
}
1829
2118
1830
2119
port = (uint16_t)tmpmax;
1831
2120
*address = '\0';
1832
address = connect_to;
1833
2121
/* Colon in address indicates IPv6 */
1834
2122
int af;
1835
if(strchr(address, ':') != NULL){
2123
if(strchr(connect_to, ':') != NULL){
1836
2124
af = AF_INET6;
2125
/* Accept [] around IPv6 address - see RFC 5952 */
2126
if(connect_to[0] == '[' and address[-1] == ']')
2127
{
2128
connect_to++;
2129
address[-1] = '\0';
2130
}
1837
2131
} else {
1838
2132
af = AF_INET;
1839
2133
}
2134
address = connect_to;
1840
2135
1841
2136
if(quit_now){
1842
2137
goto end;
1843
2138
}
1844
2139
1845
2140
while(not quit_now){
1846
2141
ret = start_mandos_communication(address, port, if_index, af);
1847
2142
if(quit_now or ret == 0){
1848
2143
break;
1849
2144
}
1850
sleep((int)retry_interval or 1);
1851
};
1852
2145
if(debug){
2146
fprintf_plus(stderr, "Retrying in %d seconds\n",
2147
(int)retry_interval);
2148
}
2149
sleep((int)retry_interval);
2150
}
2151
1853
2152
if (not quit_now){
1854
2153
exitcode = EXIT_SUCCESS;
1855
2154
}
1856
2155
1857
2156
goto end;
1858
2157
}
1859
2158
1881
2180
1882
2181
/* Check if creating the Avahi server object succeeded */
1883
2182
if(mc.server == NULL){
1884
fprintf(stderr, "Failed to create Avahi server: %s\n",
1885
avahi_strerror(error));
2183
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2184
avahi_strerror(error));
1886
2185
exitcode = EX_UNAVAILABLE;
1887
2186
goto end;
1888
2187
}
1896
2195
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1897
2196
NULL, 0, browse_callback, NULL);
1898
2197
if(sb == NULL){
1899
fprintf(stderr, "Failed to create service browser: %s\n",
1900
avahi_strerror(avahi_server_errno(mc.server)));
2198
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2199
avahi_strerror(avahi_server_errno(mc.server)));
1901
2200
exitcode = EX_UNAVAILABLE;
1902
2201
goto end;
1903
2202
}
1909
2208
/* Run the main loop */
1910
2209
1911
2210
if(debug){
1912
fprintf(stderr, "Starting Avahi loop search\n");
2211
fprintf_plus(stderr, "Starting Avahi loop search\n");
1913
2212
}
1914
2213
1915
2214
ret = avahi_loop_with_timeout(mc.simple_poll,
1916
2215
(int)(retry_interval * 1000));
1917
2216
if(debug){
1918
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1919
(ret == 0) ? "successfully" : "with error");
2217
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2218
(ret == 0) ? "successfully" : "with error");
1920
2219
}
1921
2220
1922
2221
end:
1923
2222
1924
2223
if(debug){
1925
fprintf(stderr, "%s exiting\n", argv[0]);
2224
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1926
2225
}
1927
2226
1928
2227
/* Cleanup things */
1944
2243
if(gpgme_initialized){
1945
2244
gpgme_release(mc.ctx);
1946
2245
}
1947
2246
1948
2247
/* Cleans up the circular linked list of Mandos servers the client
1949
2248
has seen */
1950
2249
if(mc.current_server != NULL){
1956
2255
}
1957
2256
}
1958
2257
1959
/* Take down the network interface */
1960
if(take_down_interface){
1961
/* Re-raise priviliges */
1962
errno = 0;
1963
ret = seteuid(0);
1964
if(ret == -1){
1965
perror_plus("seteuid");
1966
}
1967
if(geteuid() == 0){
2258
/* Run network hooks */
2259
run_network_hooks("stop", interface, delay);
2260
2261
/* Re-raise priviliges */
2262
{
2263
raise_privileges();
2264
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
1968
2267
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1969
2268
if(ret == -1){
1970
2269
perror_plus("ioctl SIOCGIFFLAGS");
1971
} else if(network.ifr_flags & IFF_UP) {
2270
} else if(network.ifr_flags & IFF_UP){
1972
2271
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1973
2272
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1974
2273
if(ret == -1){
1979
2278
if(ret == -1){
1980
2279
perror_plus("close");
1981
2280
}
1982
/* Lower privileges permanently */
1983
errno = 0;
1984
ret = setuid(uid);
1985
if(ret == -1){
1986
perror_plus("setuid");
1987
}
1988
2281
}
1989
2282
}
2283
/* Lower privileges permanently */
2284
errno = 0;
2285
ret = setuid(uid);
2286
if(ret == -1){
2287
perror_plus("setuid");
2288
}
1990
2289
1991
2290
/* Removes the GPGME temp directory and all files inside */
1992
2291
if(tempdir_created){
1993
2292
struct dirent **direntries = NULL;
1994
2293
struct dirent *direntry = NULL;
1995
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1996
if (ret > 0){
1997
for(int i = 0; i < ret; i++){
2294
int numentries = scandir(tempdir, &direntries, notdotentries,
2295
alphasort);
2296
if (numentries > 0){
2297
for(int i = 0; i < numentries; i++){
1998
2298
direntry = direntries[i];
1999
2299
char *fullname = NULL;
2000
2300
ret = asprintf(&fullname, "%s/%s", tempdir,
2005
2305
}
2006
2306
ret = remove(fullname);
2007
2307
if(ret == -1){
2008
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2009
strerror(errno));
2308
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2309
strerror(errno));
2010
2310
}
2011
2311
free(fullname);
2012
2312
}
2013
2313
}
2014
2314
2015
/* need to be cleaned even if ret == 0 because man page doesn't
2016
specify */
2315
/* need to clean even if 0 because man page doesn't specify */
2017
2316
free(direntries);
2018
if (ret == -1){
2317
if (numentries == -1){
2019
2318
perror_plus("scandir");
2020
2319
}
2021
2320
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0