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237.2.197
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: plugins.d/mandos-client.c
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- Committer: teddy at bsnet
- Date: 2010-09-21 19:16:41 UTC
- mto: (24.1.167 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100921191641-yetps84gvjo7hrrc
* mandos-ctl.xml: New.
* Makefile (DOCS): Added "mandos-ctl.8".
(mandos-ctl.8): New.
* Makefile (DOCS): Added "mandos-ctl.8".
(mandos-ctl.8): New.
- files removed:
- debian/source
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 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@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
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(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
65
#include <errno.h> /* perror(), errno */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
85
84
raise() */
86
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
87
91
88
#ifdef __linux__
92
89
#include <sys/klog.h> /* klogctl() */
110
107
init_gnutls_session(),
111
108
GNUTLS_* */
112
109
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
115
112
116
113
/* GPGME */
117
114
#include <gpgme.h> /* All GPGME types, constants and
125
122
#define PATHDIR "/conf/conf.d/mandos"
126
123
#define SECKEY "seckey.txt"
127
124
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
125
130
126
bool debug = false;
131
127
static const char mandos_protocol_version[] = "1";
132
128
const char *argp_program_version = "mandos-client " VERSION;
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
130
static const char sys_class_net[] = "/sys/class/net";
135
131
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
138
/* Doubly linked list that need to be circularly linked when used */
139
typedef struct server{
140
const char *ip;
141
uint16_t port;
142
AvahiIfIndex if_index;
143
int af;
144
struct timespec last_seen;
145
struct server *next;
146
struct server *prev;
147
} server;
148
132
149
133
/* Used for passing in values through the Avahi callback functions */
150
134
typedef struct {
155
139
gnutls_dh_params_t dh_params;
156
140
const char *priority;
157
141
gpgme_ctx_t ctx;
158
server *current_server;
159
142
} mandos_context;
160
143
161
144
/* global context so signal handler can reach it*/
162
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
146
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
166
148
167
149
sig_atomic_t quit_now = 0;
168
150
int signal_received = 0;
169
151
170
/* Function to use when printing errors */
171
void perror_plus(const char *print_text){
172
fprintf(stderr, "Mandos plugin %s: ",
173
program_invocation_short_name);
174
perror(print_text);
175
}
176
177
152
/*
178
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
179
154
* bytes. "buffer_capacity" is how much is currently allocated,
180
155
* "buffer_length" is how much is already used.
181
156
*/
182
157
size_t incbuffer(char **buffer, size_t buffer_length,
183
size_t buffer_capacity){
158
size_t buffer_capacity){
184
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
185
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
186
161
if(buffer == NULL){
191
166
return buffer_capacity;
192
167
}
193
168
194
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
197
int ret;
198
server *new_server = malloc(sizeof(server));
199
if(new_server == NULL){
200
perror_plus("malloc");
201
return -1;
202
}
203
*new_server = (server){ .ip = strdup(ip),
204
.port = port,
205
.if_index = if_index,
206
.af = af };
207
if(new_server->ip == NULL){
208
perror_plus("strdup");
209
return -1;
210
}
211
/* Special case of first server */
212
if (mc.current_server == NULL){
213
new_server->next = new_server;
214
new_server->prev = new_server;
215
mc.current_server = new_server;
216
/* Place the new server last in the list */
217
} else {
218
new_server->next = mc.current_server;
219
new_server->prev = mc.current_server->prev;
220
new_server->prev->next = new_server;
221
mc.current_server->prev = new_server;
222
}
223
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
224
if(ret == -1){
225
perror_plus("clock_gettime");
226
return -1;
227
}
228
return 0;
229
}
230
231
169
/*
232
170
* Initialize GPGME.
233
171
*/
234
static bool init_gpgme(const char *seckey, const char *pubkey,
235
const char *tempdir){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
236
174
gpgme_error_t rc;
237
175
gpgme_engine_info_t engine_info;
238
176
247
185
248
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
249
187
if(fd == -1){
250
perror_plus("open");
188
perror("open");
251
189
return false;
252
190
}
253
191
254
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
193
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
194
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
258
195
gpgme_strsource(rc), gpgme_strerror(rc));
259
196
return false;
260
197
}
261
198
262
199
rc = gpgme_op_import(mc.ctx, pgp_data);
263
200
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
266
202
gpgme_strsource(rc), gpgme_strerror(rc));
267
203
return false;
268
204
}
269
205
270
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
271
207
if(ret == -1){
272
perror_plus("close");
208
perror("close");
273
209
}
274
210
gpgme_data_release(pgp_data);
275
211
return true;
276
212
}
277
213
278
214
if(debug){
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
281
216
}
282
217
283
218
/* Init GPGME */
284
219
gpgme_check_version(NULL);
285
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
221
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
289
223
gpgme_strsource(rc), gpgme_strerror(rc));
290
224
return false;
291
225
}
292
226
293
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
294
228
rc = gpgme_get_engine_info(&engine_info);
295
229
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
298
231
gpgme_strsource(rc), gpgme_strerror(rc));
299
232
return false;
300
233
}
307
240
engine_info = engine_info->next;
308
241
}
309
242
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
312
244
return false;
313
245
}
314
246
315
247
/* Create new GPGME "context" */
316
248
rc = gpgme_new(&(mc.ctx));
317
249
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
321
252
return false;
322
253
}
323
254
342
273
ssize_t plaintext_length = 0;
343
274
344
275
if(debug){
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
347
277
}
348
278
349
279
/* Create new GPGME data buffer from memory cryptotext */
350
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
351
281
0);
352
282
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
355
284
gpgme_strsource(rc), gpgme_strerror(rc));
356
285
return -1;
357
286
}
359
288
/* Create new empty GPGME data buffer for the plaintext */
360
289
rc = gpgme_data_new(&dh_plain);
361
290
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
364
292
gpgme_strsource(rc), gpgme_strerror(rc));
365
293
gpgme_data_release(dh_crypto);
366
294
return -1;
370
298
data buffer */
371
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
300
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
375
302
gpgme_strsource(rc), gpgme_strerror(rc));
376
303
plaintext_length = -1;
377
304
if(debug){
378
305
gpgme_decrypt_result_t result;
379
306
result = gpgme_op_decrypt_result(mc.ctx);
380
307
if(result == NULL){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
309
} else {
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
310
fprintf(stderr, "Unsupported algorithm: %s\n",
386
311
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
312
fprintf(stderr, "Wrong key usage: %u\n",
389
313
result->wrong_key_usage);
390
314
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
393
316
}
394
317
gpgme_recipient_t recipient;
395
318
recipient = result->recipients;
396
319
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
320
fprintf(stderr, "Public key algorithm: %s\n",
399
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
404
324
recipient->status == GPG_ERR_NO_SECKEY
405
325
? "No" : "Yes");
406
326
recipient = recipient->next;
411
331
}
412
332
413
333
if(debug){
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
416
335
}
417
336
418
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
419
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
420
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
421
340
plaintext_length = -1;
422
341
goto decrypt_end;
423
342
}
425
344
*plaintext = NULL;
426
345
while(true){
427
346
plaintext_capacity = incbuffer(plaintext,
428
(size_t)plaintext_length,
429
plaintext_capacity);
347
(size_t)plaintext_length,
348
plaintext_capacity);
430
349
if(plaintext_capacity == 0){
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
434
353
}
435
354
436
355
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
441
360
break;
442
361
}
443
362
if(ret < 0){
444
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
445
364
plaintext_length = -1;
446
365
goto decrypt_end;
447
366
}
449
368
}
450
369
451
370
if(debug){
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
371
fprintf(stderr, "Decrypted password is: ");
454
372
for(ssize_t i = 0; i < plaintext_length; i++){
455
373
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
374
}
478
396
/* GnuTLS log function callback */
479
397
static void debuggnutls(__attribute__((unused)) int level,
480
398
const char* string){
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
399
fprintf(stderr, "GnuTLS: %s", string);
482
400
}
483
401
484
402
static int init_gnutls_global(const char *pubkeyfilename,
486
404
int ret;
487
405
488
406
if(debug){
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
407
fprintf(stderr, "Initializing GnuTLS\n");
491
408
}
492
409
493
410
ret = gnutls_global_init();
494
411
if(ret != GNUTLS_E_SUCCESS){
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
497
414
return -1;
498
415
}
499
416
506
423
}
507
424
508
425
/* OpenPGP credentials */
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
510
427
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
432
safer_gnutls_strerror(ret));
513
433
gnutls_global_deinit();
514
434
return -1;
515
435
}
516
436
517
437
if(debug){
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
520
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
440
seckeyfilename);
522
441
}
526
445
GNUTLS_OPENPGP_FMT_BASE64);
527
446
if(ret != GNUTLS_E_SUCCESS){
528
447
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
448
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
449
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
450
fprintf(stderr, "The GnuTLS error is: %s\n",
451
safer_gnutls_strerror(ret));
534
452
goto globalfail;
535
453
}
536
454
537
455
/* GnuTLS server initialization */
538
456
ret = gnutls_dh_params_init(&mc.dh_params);
539
457
if(ret != GNUTLS_E_SUCCESS){
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
542
459
" %s\n", safer_gnutls_strerror(ret));
543
460
goto globalfail;
544
461
}
545
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
546
463
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
549
465
safer_gnutls_strerror(ret));
550
466
goto globalfail;
551
467
}
572
488
}
573
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
490
if(ret != GNUTLS_E_SUCCESS){
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
577
492
safer_gnutls_strerror(ret));
578
493
}
579
494
587
502
}
588
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
504
if(ret != GNUTLS_E_SUCCESS){
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
505
fprintf(stderr, "Syntax error at: %s\n", err);
506
fprintf(stderr, "GnuTLS error: %s\n",
507
safer_gnutls_strerror(ret));
594
508
gnutls_deinit(*session);
595
509
return -1;
596
510
}
605
519
}
606
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
607
521
if(ret != GNUTLS_E_SUCCESS){
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
610
523
safer_gnutls_strerror(ret));
611
524
gnutls_deinit(*session);
612
525
return -1;
658
571
pf = PF_INET;
659
572
break;
660
573
default:
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
574
fprintf(stderr, "Bad address family: %d\n", af);
663
575
errno = EINVAL;
664
576
return -1;
665
577
}
670
582
}
671
583
672
584
if(debug){
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
675
586
"\n", ip, port);
676
587
}
677
588
678
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
679
590
if(tcp_sd < 0){
680
591
int e = errno;
681
perror_plus("socket");
592
perror("socket");
682
593
errno = e;
683
594
goto mandos_end;
684
595
}
698
609
}
699
610
if(ret < 0 ){
700
611
int e = errno;
701
perror_plus("inet_pton");
612
perror("inet_pton");
702
613
errno = e;
703
614
goto mandos_end;
704
615
}
705
616
if(ret == 0){
706
617
int e = errno;
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
618
fprintf(stderr, "Bad address: %s\n", ip);
709
619
errno = e;
710
620
goto mandos_end;
711
621
}
716
626
717
627
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
718
628
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
-Wunreachable-code*/
629
-Wunreachable-code*/
720
630
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
723
632
" without a network interface\n");
724
633
errno = EINVAL;
725
634
goto mandos_end;
742
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
743
652
char interface[IF_NAMESIZE];
744
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
perror_plus("if_indextoname");
654
perror("if_indextoname");
746
655
} else {
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
749
657
ip, interface, port);
750
658
}
751
659
} else {
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
754
662
}
755
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
763
671
sizeof(addrstr));
764
672
}
765
673
if(pcret == NULL){
766
perror_plus("inet_ntop");
674
perror("inet_ntop");
767
675
} else {
768
676
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
771
678
}
772
679
}
773
680
}
785
692
if(ret < 0){
786
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
787
694
int e = errno;
788
perror_plus("connect");
695
perror("connect");
789
696
errno = e;
790
697
}
791
698
goto mandos_end;
801
708
while(true){
802
709
size_t out_size = strlen(out);
803
710
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
804
out_size - written));
711
out_size - written));
805
712
if(ret == -1){
806
713
int e = errno;
807
perror_plus("write");
714
perror("write");
808
715
errno = e;
809
716
goto mandos_end;
810
717
}
827
734
}
828
735
829
736
if(debug){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
737
fprintf(stderr, "Establishing TLS session with %s\n", ip);
832
738
}
833
739
834
740
if(quit_now){
836
742
goto mandos_end;
837
743
}
838
744
839
/* Spurious warning from -Wint-to-pointer-cast */
840
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
841
746
842
747
if(quit_now){
854
759
855
760
if(ret != GNUTLS_E_SUCCESS){
856
761
if(debug){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
762
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
859
763
gnutls_perror(ret);
860
764
}
861
765
errno = EPROTO;
865
769
/* Read OpenPGP packet that contains the wanted password */
866
770
867
771
if(debug){
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
772
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
773
ip);
870
774
}
871
775
872
776
while(true){
877
781
}
878
782
879
783
buffer_capacity = incbuffer(&buffer, buffer_length,
880
buffer_capacity);
784
buffer_capacity);
881
785
if(buffer_capacity == 0){
882
786
int e = errno;
883
perror_plus("incbuffer");
787
perror("incbuffer");
884
788
errno = e;
885
789
goto mandos_end;
886
790
}
910
814
}
911
815
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
912
816
if(ret < 0){
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
817
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
915
818
gnutls_perror(ret);
916
819
errno = EPROTO;
917
820
goto mandos_end;
918
821
}
919
822
break;
920
823
default:
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
824
fprintf(stderr, "Unknown error while reading data from"
923
825
" encrypted session with Mandos server\n");
924
826
gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
827
errno = EIO;
931
833
}
932
834
933
835
if(debug){
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
836
fprintf(stderr, "Closing TLS session\n");
936
837
}
937
838
938
839
if(quit_now){
950
851
951
852
if(buffer_length > 0){
952
853
ssize_t decrypted_buffer_size;
953
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
854
decrypted_buffer_size = pgp_packet_decrypt(buffer,
855
buffer_length,
954
856
&decrypted_buffer);
955
857
if(decrypted_buffer_size >= 0){
956
858
967
869
if(ret == 0 and ferror(stdout)){
968
870
int e = errno;
969
871
if(debug){
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
872
fprintf(stderr, "Error writing encrypted data: %s\n",
972
873
strerror(errno));
973
874
}
974
875
errno = e;
994
895
if(e == 0){
995
896
e = errno;
996
897
}
997
perror_plus("close");
898
perror("close");
998
899
}
999
900
gnutls_deinit(session);
1000
errno = e;
1001
901
if(quit_now){
1002
errno = EINTR;
902
e = EINTR;
1003
903
retval = -1;
1004
904
}
905
errno = e;
1005
906
}
1006
907
return retval;
1007
908
}
1032
933
switch(event){
1033
934
default:
1034
935
case AVAHI_RESOLVER_FAILURE:
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
936
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1037
937
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
938
avahi_strerror(avahi_server_errno(mc.server)));
1039
939
break;
1043
943
char ip[AVAHI_ADDRESS_STR_MAX];
1044
944
avahi_address_snprint(ip, sizeof(ip), address);
1045
945
if(debug){
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
946
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1048
947
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
948
ip, (intmax_t)interface, port);
1050
949
}
1052
951
avahi_proto_to_af(proto));
1053
952
if(ret == 0){
1054
953
avahi_simple_poll_quit(mc.simple_poll);
1055
} else {
1056
ret = add_server(ip, port, interface,
1057
avahi_proto_to_af(proto));
1058
954
}
1059
955
}
1060
956
}
1084
980
default:
1085
981
case AVAHI_BROWSER_FAILURE:
1086
982
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
983
fprintf(stderr, "(Avahi browser) %s\n",
1089
984
avahi_strerror(avahi_server_errno(mc.server)));
1090
985
avahi_simple_poll_quit(mc.simple_poll);
1091
986
return;
1099
994
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1100
995
name, type, domain, protocol, 0,
1101
996
resolve_callback, NULL) == NULL)
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
997
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1104
998
name, avahi_strerror(avahi_server_errno(mc.server)));
1105
999
break;
1106
1000
1110
1004
case AVAHI_BROWSER_ALL_FOR_NOW:
1111
1005
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1112
1006
if(debug){
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1007
fprintf(stderr, "No Mandos server found, still searching...\n");
1115
1008
}
1116
1009
break;
1117
1010
}
1118
1011
}
1119
1012
1120
/* Signal handler that stops main loop after SIGTERM */
1013
/* stop main loop after sigterm has been called */
1121
1014
static void handle_sigterm(int sig){
1122
1015
if(quit_now){
1123
1016
return;
1125
1018
quit_now = 1;
1126
1019
signal_received = sig;
1127
1020
int old_errno = errno;
1128
/* set main loop to exit */
1129
1021
if(mc.simple_poll != NULL){
1130
1022
avahi_simple_poll_quit(mc.simple_poll);
1131
1023
}
1132
1024
errno = old_errno;
1133
1025
}
1134
1026
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1136
int ret;
1137
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1139
if(s < 0){
1140
perror_plus("socket");
1141
return false;
1142
}
1143
strcpy(ifr->ifr_name, ifname);
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
if(ret == -1){
1027
/*
1028
* This function determines if a directory entry in /sys/class/net
1029
* corresponds to an acceptable network device.
1030
* (This function is passed to scandir(3) as a filter function.)
1031
*/
1032
int good_interface(const struct dirent *if_entry){
1033
ssize_t ssret;
1034
char *flagname = NULL;
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1036
if_entry->d_name);
1037
if(ret < 0){
1038
perror("asprintf");
1039
return 0;
1040
}
1041
if(if_entry->d_name[0] == '.'){
1042
return 0;
1043
}
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
if(flags_fd == -1){
1046
perror("open");
1047
return 0;
1048
}
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1055
perror("malloc");
1056
close(flags_fd);
1057
return 0;
1058
}
1059
while(to_read > 0){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1061
(size_t)to_read));
1062
if(ssret == -1){
1063
perror("read");
1064
free(flagstring);
1065
close(flags_fd);
1066
return 0;
1067
}
1068
to_read -= ssret;
1069
if(ssret == 0){
1070
break;
1071
}
1072
}
1073
close(flags_fd);
1074
intmax_t tmpmax;
1075
char *tmp;
1076
errno = 0;
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
1146
1081
if(debug){
1147
perror_plus("ioctl SIOCGIFFLAGS");
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1148
1084
}
1149
return false;
1085
free(flagstring);
1086
return 0;
1150
1087
}
1151
return true;
1152
}
1153
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1156
1090
/* Reject the loopback device */
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1091
if(flags & IFF_LOOPBACK){
1158
1092
if(debug){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1161
1095
}
1162
return false;
1096
return 0;
1163
1097
}
1164
1098
/* Accept point-to-point devices only if connect_to is specified */
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1166
1100
if(debug){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1169
1103
}
1170
return true;
1104
return 1;
1171
1105
}
1172
1106
/* Otherwise, reject non-broadcast-capable devices */
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1174
if(debug){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1177
}
1178
return false;
1179
}
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
if(ifr->ifr_flags & IFF_NOARP){
1182
if(debug){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1185
}
1186
return false;
1187
}
1188
1107
if(not (flags & IFF_BROADCAST)){
1108
if(debug){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
1189
1114
/* Accept this device */
1190
1115
if(debug){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1193
}
1194
return true;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int good_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1204
return 0;
1205
}
1206
1207
struct ifreq ifr;
1208
if(not get_flags(if_entry->d_name, &ifr)){
1209
if(debug){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1227
*/
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1230
return 0;
1231
}
1232
1233
struct ifreq ifr;
1234
if(not get_flags(if_entry->d_name, &ifr)){
1235
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1239
}
1240
return 0;
1241
}
1242
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1245
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1259
}
1260
return 0;
1261
}
1262
1263
if(not good_flags(if_entry->d_name, &ifr)){
1264
return 0;
1265
}
1266
return 1;
1267
}
1268
1269
int notdotentries(const struct dirent *direntry){
1270
/* Skip "." and ".." */
1271
if(direntry->d_name[0] == '.'
1272
and (direntry->d_name[1] == '\0'
1273
or (direntry->d_name[1] == '.'
1274
and direntry->d_name[2] == '\0'))){
1275
return 0;
1276
}
1277
return 1;
1278
}
1279
1280
/* Is this directory entry a runnable program? */
1281
int runnable_hook(const struct dirent *direntry){
1282
int ret;
1283
size_t sret;
1284
struct stat st;
1285
1286
if((direntry->d_name)[0] == '\0'){
1287
/* Empty name? */
1288
return 0;
1289
}
1290
1291
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1292
"abcdefghijklmnopqrstuvwxyz"
1293
"0123456789"
1294
"_-");
1295
if((direntry->d_name)[sret] != '\0'){
1296
/* Contains non-allowed characters */
1297
if(debug){
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
1305
char *fullname = NULL;
1306
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1307
if(ret < 0){
1308
perror_plus("asprintf");
1309
return 0;
1310
}
1311
1312
ret = stat(fullname, &st);
1313
if(ret == -1){
1314
if(debug){
1315
perror_plus("Could not stat hook");
1316
}
1317
return 0;
1318
}
1319
if(not (S_ISREG(st.st_mode))){
1320
/* Not a regular file */
1321
if(debug){
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1325
}
1326
return 0;
1327
}
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
/* Not executable */
1330
if(debug){
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1334
}
1335
return 0;
1336
}
1337
return 1;
1338
}
1339
1340
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1341
int ret;
1342
struct timespec now;
1343
struct timespec waited_time;
1344
intmax_t block_time;
1345
1346
while(true){
1347
if(mc.current_server == NULL){
1348
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1351
}
1352
ret = avahi_simple_poll_iterate(s, -1);
1353
} else {
1354
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1358
}
1359
/* the current time */
1360
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1361
if(ret == -1){
1362
perror_plus("clock_gettime");
1363
return -1;
1364
}
1365
/* Calculating in ms how long time between now and server
1366
who we visted longest time ago. Now - last seen. */
1367
waited_time.tv_sec = (now.tv_sec
1368
- mc.current_server->last_seen.tv_sec);
1369
waited_time.tv_nsec = (now.tv_nsec
1370
- mc.current_server->last_seen.tv_nsec);
1371
/* total time is 10s/10,000ms.
1372
Converting to s from ms by dividing by 1,000,
1373
and ns to ms by dividing by 1,000,000. */
1374
block_time = ((retry_interval
1375
- ((intmax_t)waited_time.tv_sec * 1000))
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1377
1378
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1381
}
1382
1383
if(block_time <= 0){
1384
ret = start_mandos_communication(mc.current_server->ip,
1385
mc.current_server->port,
1386
mc.current_server->if_index,
1387
mc.current_server->af);
1388
if(ret == 0){
1389
avahi_simple_poll_quit(mc.simple_poll);
1390
return 0;
1391
}
1392
ret = clock_gettime(CLOCK_MONOTONIC,
1393
&mc.current_server->last_seen);
1394
if(ret == -1){
1395
perror_plus("clock_gettime");
1396
return -1;
1397
}
1398
mc.current_server = mc.current_server->next;
1399
block_time = 0; /* Call avahi to find new Mandos
1400
servers, but don't block */
1401
}
1402
1403
ret = avahi_simple_poll_iterate(s, (int)block_time);
1404
}
1405
if(ret != 0){
1406
if (ret > 0 or errno != EINTR){
1407
return (ret != 1) ? ret : 0;
1408
}
1409
}
1410
}
1411
}
1412
1413
bool run_network_hooks(const char *mode, const char *interface,
1414
const float delay){
1415
struct dirent **direntries;
1416
struct dirent *direntry;
1417
int ret;
1418
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1419
alphasort);
1420
if(numhooks == -1){
1421
perror_plus("scandir");
1422
} else {
1423
int devnull = open("/dev/null", O_RDONLY);
1424
for(int i = 0; i < numhooks; i++){
1425
direntry = direntries[0];
1426
char *fullname = NULL;
1427
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1428
if(ret < 0){
1429
perror_plus("asprintf");
1430
continue;
1431
}
1432
pid_t hook_pid = fork();
1433
if(hook_pid == 0){
1434
/* Child */
1435
dup2(devnull, STDIN_FILENO);
1436
close(devnull);
1437
dup2(STDERR_FILENO, STDOUT_FILENO);
1438
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1439
if(ret == -1){
1440
perror_plus("setenv");
1441
return false;
1442
}
1443
ret = setenv("DEVICE", interface, 1);
1444
if(ret == -1){
1445
perror_plus("setenv");
1446
return false;
1447
}
1448
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1449
if(ret == -1){
1450
perror_plus("setenv");
1451
return false;
1452
}
1453
ret = setenv("MODE", mode, 1);
1454
if(ret == -1){
1455
perror_plus("setenv");
1456
return false;
1457
}
1458
char *delaystring;
1459
ret = asprintf(&delaystring, "%f", delay);
1460
if(ret == -1){
1461
perror_plus("asprintf");
1462
return false;
1463
}
1464
ret = setenv("DELAY", delaystring, 1);
1465
if(ret == -1){
1466
free(delaystring);
1467
perror_plus("setenv");
1468
return false;
1469
}
1470
free(delaystring);
1471
ret = execl(fullname, direntry->d_name, mode, NULL);
1472
perror_plus("execl");
1473
} else {
1474
int status;
1475
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1476
perror_plus("waitpid");
1477
free(fullname);
1478
continue;
1479
}
1480
if(WIFEXITED(status)){
1481
if(WEXITSTATUS(status) != 0){
1482
fprintf(stderr, "Mandos plugin mandos-client: "
1483
"Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1486
free(fullname);
1487
continue;
1488
}
1489
} else if(WIFSIGNALED(status)){
1490
fprintf(stderr, "Mandos plugin mandos-client: "
1491
"Warning: network hook \"%s\" died by"
1492
" signal %d\n", direntry->d_name,
1493
WTERMSIG(status));
1494
free(fullname);
1495
continue;
1496
} else {
1497
fprintf(stderr, "Mandos plugin mandos-client: "
1498
"Warning: network hook \"%s\" crashed\n",
1499
direntry->d_name);
1500
free(fullname);
1501
continue;
1502
}
1503
}
1504
free(fullname);
1505
if(quit_now){
1506
break;
1507
}
1508
}
1509
close(devnull);
1510
}
1511
return true;
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
1512
1120
}
1513
1121
1514
1122
int main(int argc, char *argv[]){
1533
1141
bool gnutls_initialized = false;
1534
1142
bool gpgme_initialized = false;
1535
1143
float delay = 2.5f;
1536
double retry_interval = 10; /* 10s between trying a server and
1537
retrying the same server again */
1538
1144
1539
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1540
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1546
1152
errno = 0;
1547
1153
ret = setgid(gid);
1548
1154
if(ret == -1){
1549
perror_plus("setgid");
1155
perror("setgid");
1550
1156
}
1551
1157
1552
1158
/* Lower user privileges (temporarily) */
1553
1159
errno = 0;
1554
1160
ret = seteuid(uid);
1555
1161
if(ret == -1){
1556
perror_plus("seteuid");
1162
perror("seteuid");
1557
1163
}
1558
1164
1559
1165
if(quit_now){
1594
1200
.arg = "SECONDS",
1595
1201
.doc = "Maximum delay to wait for interface startup",
1596
1202
.group = 2 },
1597
{ .name = "retry", .key = 132,
1598
.arg = "SECONDS",
1599
.doc = "Retry interval used when denied by the mandos server",
1600
.group = 2 },
1601
{ .name = "network-hook-dir", .key = 133,
1602
.arg = "DIR",
1603
.doc = "Directory where network hooks are located",
1604
.group = 2 },
1605
1203
/*
1606
1204
* These reproduce what we would get without ARGP_NO_HELP
1607
1205
*/
1651
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1652
1250
argp_error(state, "Bad delay");
1653
1251
}
1654
case 132: /* --retry */
1655
errno = 0;
1656
retry_interval = strtod(arg, &tmp);
1657
if(errno != 0 or tmp == arg or *tmp != '\0'
1658
or (retry_interval * 1000) > INT_MAX
1659
or retry_interval < 0){
1660
argp_error(state, "Bad retry interval");
1661
}
1662
break;
1663
case 133: /* --network-hook-dir */
1664
hookdir = arg;
1665
1252
break;
1666
1253
/*
1667
1254
* These reproduce what we would get without ARGP_NO_HELP
1674
1261
argp_state_help(state, state->out_stream,
1675
1262
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1676
1263
case 'V': /* --version */
1677
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1678
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1679
1265
exit(argp_err_exit_status);
1680
1266
break;
1696
1282
case ENOMEM:
1697
1283
default:
1698
1284
errno = ret;
1699
perror_plus("argp_parse");
1285
perror("argp_parse");
1700
1286
exitcode = EX_OSERR;
1701
1287
goto end;
1702
1288
case EINVAL:
1704
1290
goto end;
1705
1291
}
1706
1292
}
1707
1708
{
1709
/* Work around Debian bug #633582:
1710
<http://bugs.debian.org/633582> */
1711
struct stat st;
1712
1713
/* Re-raise priviliges */
1714
errno = 0;
1715
ret = seteuid(0);
1716
if(ret == -1){
1717
perror_plus("seteuid");
1718
}
1719
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1724
} else {
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1726
if(ret == -1){
1727
perror_plus("fstat");
1728
} else {
1729
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1730
ret = fchown(seckey_fd, uid, gid);
1731
if(ret == -1){
1732
perror_plus("fchown");
1733
}
1734
}
1735
}
1736
TEMP_FAILURE_RETRY(close(seckey_fd));
1737
}
1738
}
1739
1740
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1741
int pubkey_fd = open(pubkey, O_RDONLY);
1742
if(pubkey_fd == -1){
1743
perror_plus("open");
1744
} else {
1745
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1746
if(ret == -1){
1747
perror_plus("fstat");
1748
} else {
1749
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1760
/* Lower privileges */
1761
errno = 0;
1762
ret = seteuid(uid);
1763
if(ret == -1){
1764
perror_plus("seteuid");
1765
}
1766
}
1767
1768
/* Run network hooks */
1769
{
1770
/* Re-raise priviliges */
1771
errno = 0;
1772
ret = seteuid(0);
1773
if(ret == -1){
1774
perror_plus("seteuid");
1775
}
1776
if(not run_network_hooks("start", interface, delay)){
1777
goto end;
1778
}
1779
/* Lower privileges */
1780
errno = 0;
1781
ret = seteuid(uid);
1782
if(ret == -1){
1783
perror_plus("seteuid");
1784
}
1785
}
1786
1293
1787
1294
if(not debug){
1788
1295
avahi_set_log_function(empty_log);
1789
1296
}
1790
1297
1791
1298
if(interface[0] == '\0'){
1792
1299
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1795
1301
alphasort);
1796
if(ret == 0){
1797
/* No up interfaces, look for any good interfaces */
1798
free(direntries);
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1800
alphasort);
1801
}
1802
1302
if(ret >= 1){
1803
/* Pick the first interface returned */
1303
/* Pick the first good interface */
1804
1304
interface = strdup(direntries[0]->d_name);
1805
1305
if(debug){
1806
fprintf(stderr, "Mandos plugin mandos-client: "
1807
"Using interface \"%s\"\n", interface);
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1808
1307
}
1809
1308
if(interface == NULL){
1810
perror_plus("malloc");
1309
perror("malloc");
1811
1310
free(direntries);
1812
1311
exitcode = EXIT_FAILURE;
1813
1312
goto end;
1815
1314
free(direntries);
1816
1315
} else {
1817
1316
free(direntries);
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Could not find a network interface\n");
1317
fprintf(stderr, "Could not find a network interface\n");
1820
1318
exitcode = EXIT_FAILURE;
1821
1319
goto end;
1822
1320
}
1828
1326
srand((unsigned int) time(NULL));
1829
1327
mc.simple_poll = avahi_simple_poll_new();
1830
1328
if(mc.simple_poll == NULL){
1831
fprintf(stderr, "Mandos plugin mandos-client: "
1832
"Avahi: Failed to create simple poll object.\n");
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1833
1330
exitcode = EX_UNAVAILABLE;
1834
1331
goto end;
1835
1332
}
1837
1334
sigemptyset(&sigterm_action.sa_mask);
1838
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1839
1336
if(ret == -1){
1840
perror_plus("sigaddset");
1337
perror("sigaddset");
1841
1338
exitcode = EX_OSERR;
1842
1339
goto end;
1843
1340
}
1844
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1845
1342
if(ret == -1){
1846
perror_plus("sigaddset");
1343
perror("sigaddset");
1847
1344
exitcode = EX_OSERR;
1848
1345
goto end;
1849
1346
}
1850
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1851
1348
if(ret == -1){
1852
perror_plus("sigaddset");
1349
perror("sigaddset");
1853
1350
exitcode = EX_OSERR;
1854
1351
goto end;
1855
1352
}
1859
1356
*/
1860
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1861
1358
if(ret == -1){
1862
perror_plus("sigaction");
1359
perror("sigaction");
1863
1360
return EX_OSERR;
1864
1361
}
1865
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
1866
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
1867
1364
if(ret == -1){
1868
perror_plus("sigaction");
1365
perror("sigaction");
1869
1366
exitcode = EX_OSERR;
1870
1367
goto end;
1871
1368
}
1872
1369
}
1873
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1874
1371
if(ret == -1){
1875
perror_plus("sigaction");
1372
perror("sigaction");
1876
1373
return EX_OSERR;
1877
1374
}
1878
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
1879
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1880
1377
if(ret == -1){
1881
perror_plus("sigaction");
1378
perror("sigaction");
1882
1379
exitcode = EX_OSERR;
1883
1380
goto end;
1884
1381
}
1885
1382
}
1886
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1887
1384
if(ret == -1){
1888
perror_plus("sigaction");
1385
perror("sigaction");
1889
1386
return EX_OSERR;
1890
1387
}
1891
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
1892
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1893
1390
if(ret == -1){
1894
perror_plus("sigaction");
1391
perror("sigaction");
1895
1392
exitcode = EX_OSERR;
1896
1393
goto end;
1897
1394
}
1901
1398
if(strcmp(interface, "none") != 0){
1902
1399
if_index = (AvahiIfIndex) if_nametoindex(interface);
1903
1400
if(if_index == 0){
1904
fprintf(stderr, "Mandos plugin mandos-client: "
1905
"No such interface: \"%s\"\n", interface);
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1906
1402
exitcode = EX_UNAVAILABLE;
1907
1403
goto end;
1908
1404
}
1915
1411
errno = 0;
1916
1412
ret = seteuid(0);
1917
1413
if(ret == -1){
1918
perror_plus("seteuid");
1414
perror("seteuid");
1919
1415
}
1920
1416
1921
1417
#ifdef __linux__
1925
1421
bool restore_loglevel = true;
1926
1422
if(ret == -1){
1927
1423
restore_loglevel = false;
1928
perror_plus("klogctl");
1424
perror("klogctl");
1929
1425
}
1930
1426
#endif /* __linux__ */
1931
1427
1932
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1933
1429
if(sd < 0){
1934
perror_plus("socket");
1430
perror("socket");
1935
1431
exitcode = EX_OSERR;
1936
1432
#ifdef __linux__
1937
1433
if(restore_loglevel){
1938
1434
ret = klogctl(7, NULL, 0);
1939
1435
if(ret == -1){
1940
perror_plus("klogctl");
1436
perror("klogctl");
1941
1437
}
1942
1438
}
1943
1439
#endif /* __linux__ */
1945
1441
errno = 0;
1946
1442
ret = seteuid(uid);
1947
1443
if(ret == -1){
1948
perror_plus("seteuid");
1444
perror("seteuid");
1949
1445
}
1950
1446
goto end;
1951
1447
}
1952
1448
strcpy(network.ifr_name, interface);
1953
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1954
1450
if(ret == -1){
1955
perror_plus("ioctl SIOCGIFFLAGS");
1451
perror("ioctl SIOCGIFFLAGS");
1956
1452
#ifdef __linux__
1957
1453
if(restore_loglevel){
1958
1454
ret = klogctl(7, NULL, 0);
1959
1455
if(ret == -1){
1960
perror_plus("klogctl");
1456
perror("klogctl");
1961
1457
}
1962
1458
}
1963
1459
#endif /* __linux__ */
1966
1462
errno = 0;
1967
1463
ret = seteuid(uid);
1968
1464
if(ret == -1){
1969
perror_plus("seteuid");
1465
perror("seteuid");
1970
1466
}
1971
1467
goto end;
1972
1468
}
1976
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1977
1473
if(ret == -1){
1978
1474
take_down_interface = false;
1979
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1980
1476
exitcode = EX_OSERR;
1981
1477
#ifdef __linux__
1982
1478
if(restore_loglevel){
1983
1479
ret = klogctl(7, NULL, 0);
1984
1480
if(ret == -1){
1985
perror_plus("klogctl");
1481
perror("klogctl");
1986
1482
}
1987
1483
}
1988
1484
#endif /* __linux__ */
1990
1486
errno = 0;
1991
1487
ret = seteuid(uid);
1992
1488
if(ret == -1){
1993
perror_plus("seteuid");
1489
perror("seteuid");
1994
1490
}
1995
1491
goto end;
1996
1492
}
1997
1493
}
1998
/* Sleep checking until interface is running.
1999
Check every 0.25s, up to total time of delay */
1494
/* sleep checking until interface is running */
2000
1495
for(int i=0; i < delay * 4; i++){
2001
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2002
1497
if(ret == -1){
2003
perror_plus("ioctl SIOCGIFFLAGS");
1498
perror("ioctl SIOCGIFFLAGS");
2004
1499
} else if(network.ifr_flags & IFF_RUNNING){
2005
1500
break;
2006
1501
}
2007
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
2008
1503
ret = nanosleep(&sleeptime, NULL);
2009
1504
if(ret == -1 and errno != EINTR){
2010
perror_plus("nanosleep");
1505
perror("nanosleep");
2011
1506
}
2012
1507
}
2013
1508
if(not take_down_interface){
2014
1509
/* We won't need the socket anymore */
2015
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2016
1511
if(ret == -1){
2017
perror_plus("close");
1512
perror("close");
2018
1513
}
2019
1514
}
2020
1515
#ifdef __linux__
2022
1517
/* Restores kernel loglevel to default */
2023
1518
ret = klogctl(7, NULL, 0);
2024
1519
if(ret == -1){
2025
perror_plus("klogctl");
1520
perror("klogctl");
2026
1521
}
2027
1522
}
2028
1523
#endif /* __linux__ */
2029
1524
/* Lower privileges */
2030
1525
errno = 0;
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
1526
if(take_down_interface){
1527
/* Lower privileges */
1528
ret = seteuid(uid);
1529
if(ret == -1){
1530
perror("seteuid");
1531
}
1532
} else {
1533
/* Lower privileges permanently */
1534
ret = setuid(uid);
1535
if(ret == -1){
1536
perror("setuid");
1537
}
2035
1538
}
2036
1539
}
2037
1540
2041
1544
2042
1545
ret = init_gnutls_global(pubkey, seckey);
2043
1546
if(ret == -1){
2044
fprintf(stderr, "Mandos plugin mandos-client: "
2045
"init_gnutls_global failed\n");
1547
fprintf(stderr, "init_gnutls_global failed\n");
2046
1548
exitcode = EX_UNAVAILABLE;
2047
1549
goto end;
2048
1550
} else {
2053
1555
goto end;
2054
1556
}
2055
1557
1558
tempdir_created = true;
2056
1559
if(mkdtemp(tempdir) == NULL){
2057
perror_plus("mkdtemp");
1560
tempdir_created = false;
1561
perror("mkdtemp");
2058
1562
goto end;
2059
1563
}
2060
tempdir_created = true;
2061
1564
2062
1565
if(quit_now){
2063
1566
goto end;
2064
1567
}
2065
1568
2066
1569
if(not init_gpgme(pubkey, seckey, tempdir)){
2067
fprintf(stderr, "Mandos plugin mandos-client: "
2068
"init_gpgme failed\n");
1570
fprintf(stderr, "init_gpgme failed\n");
2069
1571
exitcode = EX_UNAVAILABLE;
2070
1572
goto end;
2071
1573
} else {
2081
1583
/* (Mainly meant for debugging) */
2082
1584
char *address = strrchr(connect_to, ':');
2083
1585
if(address == NULL){
2084
fprintf(stderr, "Mandos plugin mandos-client: "
2085
"No colon in address\n");
1586
fprintf(stderr, "No colon in address\n");
2086
1587
exitcode = EX_USAGE;
2087
1588
goto end;
2088
1589
}
2096
1597
tmpmax = strtoimax(address+1, &tmp, 10);
2097
1598
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2098
1599
or tmpmax != (uint16_t)tmpmax){
2099
fprintf(stderr, "Mandos plugin mandos-client: "
2100
"Bad port number\n");
1600
fprintf(stderr, "Bad port number\n");
2101
1601
exitcode = EX_USAGE;
2102
1602
goto end;
2103
1603
}
2108
1608
2109
1609
port = (uint16_t)tmpmax;
2110
1610
*address = '\0';
1611
address = connect_to;
2111
1612
/* Colon in address indicates IPv6 */
2112
1613
int af;
2113
if(strchr(connect_to, ':') != NULL){
1614
if(strchr(address, ':') != NULL){
2114
1615
af = AF_INET6;
2115
/* Accept [] around IPv6 address - see RFC 5952 */
2116
if(connect_to[0] == '[' and address[-1] == ']')
2117
{
2118
connect_to++;
2119
address[-1] = '\0';
2120
}
2121
1616
} else {
2122
1617
af = AF_INET;
2123
1618
}
2124
address = connect_to;
2125
1619
2126
1620
if(quit_now){
2127
1621
goto end;
2128
1622
}
2129
1623
2130
1624
while(not quit_now){
2131
1625
ret = start_mandos_communication(address, port, if_index, af);
2132
1626
if(quit_now or ret == 0){
2133
1627
break;
2134
1628
}
2135
if(debug){
2136
fprintf(stderr, "Mandos plugin mandos-client: "
2137
"Retrying in %d seconds\n", (int)retry_interval);
2138
}
2139
sleep((int)retry_interval);
2140
}
2141
1629
sleep(15);
1630
};
1631
2142
1632
if (not quit_now){
2143
1633
exitcode = EXIT_SUCCESS;
2144
1634
}
2145
1635
2146
1636
goto end;
2147
1637
}
2148
1638
2170
1660
2171
1661
/* Check if creating the Avahi server object succeeded */
2172
1662
if(mc.server == NULL){
2173
fprintf(stderr, "Mandos plugin mandos-client: "
2174
"Failed to create Avahi server: %s\n",
1663
fprintf(stderr, "Failed to create Avahi server: %s\n",
2175
1664
avahi_strerror(error));
2176
1665
exitcode = EX_UNAVAILABLE;
2177
1666
goto end;
2186
1675
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2187
1676
NULL, 0, browse_callback, NULL);
2188
1677
if(sb == NULL){
2189
fprintf(stderr, "Mandos plugin mandos-client: "
2190
"Failed to create service browser: %s\n",
1678
fprintf(stderr, "Failed to create service browser: %s\n",
2191
1679
avahi_strerror(avahi_server_errno(mc.server)));
2192
1680
exitcode = EX_UNAVAILABLE;
2193
1681
goto end;
2200
1688
/* Run the main loop */
2201
1689
2202
1690
if(debug){
2203
fprintf(stderr, "Mandos plugin mandos-client: "
2204
"Starting Avahi loop search\n");
2205
}
2206
2207
ret = avahi_loop_with_timeout(mc.simple_poll,
2208
(int)(retry_interval * 1000));
2209
if(debug){
2210
fprintf(stderr, "Mandos plugin mandos-client: "
2211
"avahi_loop_with_timeout exited %s\n",
2212
(ret == 0) ? "successfully" : "with error");
2213
}
1691
fprintf(stderr, "Starting Avahi loop search\n");
1692
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
2214
1695
2215
1696
end:
2216
1697
2217
1698
if(debug){
2218
fprintf(stderr, "Mandos plugin mandos-client: "
2219
"%s exiting\n", argv[0]);
1699
fprintf(stderr, "%s exiting\n", argv[0]);
2220
1700
}
2221
1701
2222
1702
/* Cleanup things */
2238
1718
if(gpgme_initialized){
2239
1719
gpgme_release(mc.ctx);
2240
1720
}
2241
2242
/* Cleans up the circular linked list of Mandos servers the client
2243
has seen */
2244
if(mc.current_server != NULL){
2245
mc.current_server->prev->next = NULL;
2246
while(mc.current_server != NULL){
2247
server *next = mc.current_server->next;
2248
free(mc.current_server);
2249
mc.current_server = next;
2250
}
2251
}
2252
1721
2253
/* Re-raise priviliges */
2254
{
1722
/* Take down the network interface */
1723
if(take_down_interface){
1724
/* Re-raise priviliges */
2255
1725
errno = 0;
2256
1726
ret = seteuid(0);
2257
1727
if(ret == -1){
2258
perror_plus("seteuid");
2259
}
2260
/* Run network hooks */
2261
if(not run_network_hooks("stop", interface, delay)){
2262
goto end;
2263
}
2264
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
1728
perror("seteuid");
1729
}
1730
if(geteuid() == 0){
2267
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2268
1732
if(ret == -1){
2269
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
1733
perror("ioctl SIOCGIFFLAGS");
1734
} else if(network.ifr_flags & IFF_UP) {
2271
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2273
1737
if(ret == -1){
2274
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2275
1739
}
2276
1740
}
2277
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2278
1742
if(ret == -1){
2279
perror_plus("close");
1743
perror("close");
1744
}
1745
/* Lower privileges permanently */
1746
errno = 0;
1747
ret = setuid(uid);
1748
if(ret == -1){
1749
perror("setuid");
2280
1750
}
2281
1751
}
2282
1752
}
2283
/* Lower privileges permanently */
2284
errno = 0;
2285
ret = setuid(uid);
2286
if(ret == -1){
2287
perror_plus("setuid");
2288
}
2289
1753
2290
/* Removes the GPGME temp directory and all files inside */
1754
/* Removes the temp directory used by GPGME */
2291
1755
if(tempdir_created){
2292
struct dirent **direntries = NULL;
2293
struct dirent *direntry = NULL;
2294
int numentries = scandir(tempdir, &direntries, notdotentries,
2295
alphasort);
2296
if (numentries > 0){
2297
for(int i = 0; i < numentries; i++){
2298
direntry = direntries[i];
1756
DIR *d;
1757
struct dirent *direntry;
1758
d = opendir(tempdir);
1759
if(d == NULL){
1760
if(errno != ENOENT){
1761
perror("opendir");
1762
}
1763
} else {
1764
while(true){
1765
direntry = readdir(d);
1766
if(direntry == NULL){
1767
break;
1768
}
1769
/* Skip "." and ".." */
1770
if(direntry->d_name[0] == '.'
1771
and (direntry->d_name[1] == '\0'
1772
or (direntry->d_name[1] == '.'
1773
and direntry->d_name[2] == '\0'))){
1774
continue;
1775
}
2299
1776
char *fullname = NULL;
2300
1777
ret = asprintf(&fullname, "%s/%s", tempdir,
2301
1778
direntry->d_name);
2302
1779
if(ret < 0){
2303
perror_plus("asprintf");
1780
perror("asprintf");
2304
1781
continue;
2305
1782
}
2306
1783
ret = remove(fullname);
2307
1784
if(ret == -1){
2308
fprintf(stderr, "Mandos plugin mandos-client: "
2309
"remove(\"%s\"): %s\n", fullname, strerror(errno));
1785
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1786
strerror(errno));
2310
1787
}
2311
1788
free(fullname);
2312
1789
}
2313
}
2314
2315
/* need to clean even if 0 because man page doesn't specify */
2316
free(direntries);
2317
if (numentries == -1){
2318
perror_plus("scandir");
1790
closedir(d);
2319
1791
}
2320
1792
ret = rmdir(tempdir);
2321
1793
if(ret == -1 and errno != ENOENT){
2322
perror_plus("rmdir");
1794
perror("rmdir");
2323
1795
}
2324
1796
}
2325
1797
2330
1802
&old_sigterm_action,
2331
1803
NULL));
2332
1804
if(ret == -1){
2333
perror_plus("sigaction");
1805
perror("sigaction");
2334
1806
}
2335
1807
do {
2336
1808
ret = raise(signal_received);
2337
1809
} while(ret != 0 and errno == EINTR);
2338
1810
if(ret != 0){
2339
perror_plus("raise");
1811
perror("raise");
2340
1812
abort();
2341
1813
}
2342
1814
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0