(root)/mandos/release
» Revision
237.7.78
(compared to revision 24.1.149)
: plugins.d/mandos-client.c
To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 237.7.78
- compare with another revision
- download diff
- download tarball
- view history from revision 237.7.78
- Committer: teddy at bsnet
- Date: 2011-12-23 20:00:52 UTC
- mto: (237.7.89 trunk) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@fukt.bsnet.se-20111223200052-nehnjfy0fogvm4ii
* mandos (initlogger): Take new "debug" argument; all callers changed.
Only add console logger in debug mode.
(main/cleanup): Remove temp file on failure.
Only add console logger in debug mode.
(main/cleanup): Remove temp file on failure.
- files added:
- DBUS-API
- debian/source
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
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() */
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() */
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
#include <time.h> /* nanosleep(), time() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
69
70
if_nametoindex(), IF_NAMESIZE */
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
76
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
84
85
raise() */
85
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
87
91
88
92
#ifdef __linux__
89
93
#include <sys/klog.h> /* klogctl() */
107
111
init_gnutls_session(),
108
112
GNUTLS_* */
109
113
#include <gnutls/openpgp.h>
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
112
116
113
117
/* GPGME */
114
118
#include <gpgme.h> /* All GPGME types, constants and
122
126
#define PATHDIR "/conf/conf.d/mandos"
123
127
#define SECKEY "seckey.txt"
124
128
#define PUBKEY "pubkey.txt"
129
#define HOOKDIR "/lib/mandos/network-hooks.d"
125
130
126
131
bool debug = false;
127
132
static const char mandos_protocol_version[] = "1";
128
133
const char *argp_program_version = "mandos-client " VERSION;
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
135
static const char sys_class_net[] = "/sys/class/net";
136
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
139
/* Doubly linked list that need to be circularly linked when used */
140
typedef struct server{
141
const char *ip;
142
uint16_t port;
143
AvahiIfIndex if_index;
144
int af;
145
struct timespec last_seen;
146
struct server *next;
147
struct server *prev;
148
} server;
130
149
131
150
/* Used for passing in values through the Avahi callback functions */
132
151
typedef struct {
137
156
gnutls_dh_params_t dh_params;
138
157
const char *priority;
139
158
gpgme_ctx_t ctx;
159
server *current_server;
140
160
} mandos_context;
141
161
142
162
/* global context so signal handler can reach it*/
143
163
mandos_context mc = { .simple_poll = NULL, .server = NULL,
144
164
.dh_bits = 1024, .priority = "SECURE256"
145
":!CTYPE-X.509:+CTYPE-OPENPGP" };
165
":!CTYPE-X.509:+CTYPE-OPENPGP",
166
.current_server = NULL };
146
167
147
168
sig_atomic_t quit_now = 0;
148
169
int signal_received = 0;
149
170
171
/* Function to use when printing errors */
172
void perror_plus(const char *print_text){
173
fprintf(stderr, "Mandos plugin %s: ",
174
program_invocation_short_name);
175
perror(print_text);
176
}
177
178
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_list ap;
180
va_start (ap, format);
181
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
185
}
186
150
187
/*
151
188
* Make additional room in "buffer" for at least BUFFER_SIZE more
152
189
* bytes. "buffer_capacity" is how much is currently allocated,
153
190
* "buffer_length" is how much is already used.
154
191
*/
155
192
size_t incbuffer(char **buffer, size_t buffer_length,
156
size_t buffer_capacity){
193
size_t buffer_capacity){
157
194
if(buffer_length + BUFFER_SIZE > buffer_capacity){
158
195
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
159
196
if(buffer == NULL){
164
201
return buffer_capacity;
165
202
}
166
203
204
/* Add server to set of servers to retry periodically */
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
207
int ret;
208
server *new_server = malloc(sizeof(server));
209
if(new_server == NULL){
210
perror_plus("malloc");
211
return -1;
212
}
213
*new_server = (server){ .ip = strdup(ip),
214
.port = port,
215
.if_index = if_index,
216
.af = af };
217
if(new_server->ip == NULL){
218
perror_plus("strdup");
219
return -1;
220
}
221
/* Special case of first server */
222
if (mc.current_server == NULL){
223
new_server->next = new_server;
224
new_server->prev = new_server;
225
mc.current_server = new_server;
226
/* Place the new server last in the list */
227
} else {
228
new_server->next = mc.current_server;
229
new_server->prev = mc.current_server->prev;
230
new_server->prev->next = new_server;
231
mc.current_server->prev = new_server;
232
}
233
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
234
if(ret == -1){
235
perror_plus("clock_gettime");
236
return -1;
237
}
238
return 0;
239
}
240
167
241
/*
168
242
* Initialize GPGME.
169
243
*/
170
static bool init_gpgme(const char *seckey,
171
const char *pubkey, const char *tempdir){
244
static bool init_gpgme(const char *seckey, const char *pubkey,
245
const char *tempdir){
172
246
gpgme_error_t rc;
173
247
gpgme_engine_info_t engine_info;
174
248
183
257
184
258
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
185
259
if(fd == -1){
186
perror("open");
260
perror_plus("open");
187
261
return false;
188
262
}
189
263
190
264
rc = gpgme_data_new_from_fd(&pgp_data, fd);
191
265
if(rc != GPG_ERR_NO_ERROR){
192
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
193
gpgme_strsource(rc), gpgme_strerror(rc));
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
194
268
return false;
195
269
}
196
270
197
271
rc = gpgme_op_import(mc.ctx, pgp_data);
198
272
if(rc != GPG_ERR_NO_ERROR){
199
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
200
gpgme_strsource(rc), gpgme_strerror(rc));
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
201
275
return false;
202
276
}
203
277
204
278
ret = (int)TEMP_FAILURE_RETRY(close(fd));
205
279
if(ret == -1){
206
perror("close");
280
perror_plus("close");
207
281
}
208
282
gpgme_data_release(pgp_data);
209
283
return true;
210
284
}
211
285
212
286
if(debug){
213
fprintf(stderr, "Initializing GPGME\n");
287
fprintf_plus(stderr, "Initializing GPGME\n");
214
288
}
215
289
216
290
/* Init GPGME */
217
291
gpgme_check_version(NULL);
218
292
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
219
293
if(rc != GPG_ERR_NO_ERROR){
220
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
221
gpgme_strsource(rc), gpgme_strerror(rc));
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
222
296
return false;
223
297
}
224
298
225
/* Set GPGME home directory for the OpenPGP engine only */
299
/* Set GPGME home directory for the OpenPGP engine only */
226
300
rc = gpgme_get_engine_info(&engine_info);
227
301
if(rc != GPG_ERR_NO_ERROR){
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
229
gpgme_strsource(rc), gpgme_strerror(rc));
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
230
304
return false;
231
305
}
232
306
while(engine_info != NULL){
238
312
engine_info = engine_info->next;
239
313
}
240
314
if(engine_info == NULL){
241
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
242
317
return false;
243
318
}
244
319
245
320
/* Create new GPGME "context" */
246
321
rc = gpgme_new(&(mc.ctx));
247
322
if(rc != GPG_ERR_NO_ERROR){
248
fprintf(stderr, "bad gpgme_new: %s: %s\n",
249
gpgme_strsource(rc), gpgme_strerror(rc));
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
250
326
return false;
251
327
}
252
328
271
347
ssize_t plaintext_length = 0;
272
348
273
349
if(debug){
274
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
275
351
}
276
352
277
353
/* Create new GPGME data buffer from memory cryptotext */
278
354
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
279
355
0);
280
356
if(rc != GPG_ERR_NO_ERROR){
281
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
282
gpgme_strsource(rc), gpgme_strerror(rc));
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
283
359
return -1;
284
360
}
285
361
286
362
/* Create new empty GPGME data buffer for the plaintext */
287
363
rc = gpgme_data_new(&dh_plain);
288
364
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
291
368
gpgme_data_release(dh_crypto);
292
369
return -1;
293
370
}
296
373
data buffer */
297
374
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
298
375
if(rc != GPG_ERR_NO_ERROR){
299
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
301
378
plaintext_length = -1;
302
379
if(debug){
303
380
gpgme_decrypt_result_t result;
304
381
result = gpgme_op_decrypt_result(mc.ctx);
305
382
if(result == NULL){
306
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
307
384
} else {
308
fprintf(stderr, "Unsupported algorithm: %s\n",
309
result->unsupported_algorithm);
310
fprintf(stderr, "Wrong key usage: %u\n",
311
result->wrong_key_usage);
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
312
389
if(result->file_name != NULL){
313
fprintf(stderr, "File name: %s\n", result->file_name);
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
314
391
}
315
392
gpgme_recipient_t recipient;
316
393
recipient = result->recipients;
317
394
while(recipient != NULL){
318
fprintf(stderr, "Public key algorithm: %s\n",
319
gpgme_pubkey_algo_name(recipient->pubkey_algo));
320
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
321
fprintf(stderr, "Secret key available: %s\n",
322
recipient->status == GPG_ERR_NO_SECKEY
323
? "No" : "Yes");
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
401
? "No" : "Yes");
324
402
recipient = recipient->next;
325
403
}
326
404
}
329
407
}
330
408
331
409
if(debug){
332
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
333
411
}
334
412
335
413
/* Seek back to the beginning of the GPGME plaintext data buffer */
336
414
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
337
perror("gpgme_data_seek");
415
perror_plus("gpgme_data_seek");
338
416
plaintext_length = -1;
339
417
goto decrypt_end;
340
418
}
342
420
*plaintext = NULL;
343
421
while(true){
344
422
plaintext_capacity = incbuffer(plaintext,
345
(size_t)plaintext_length,
346
plaintext_capacity);
423
(size_t)plaintext_length,
424
plaintext_capacity);
347
425
if(plaintext_capacity == 0){
348
perror("incbuffer");
349
plaintext_length = -1;
350
goto decrypt_end;
426
perror_plus("incbuffer");
427
plaintext_length = -1;
428
goto decrypt_end;
351
429
}
352
430
353
431
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
358
436
break;
359
437
}
360
438
if(ret < 0){
361
perror("gpgme_data_read");
439
perror_plus("gpgme_data_read");
362
440
plaintext_length = -1;
363
441
goto decrypt_end;
364
442
}
366
444
}
367
445
368
446
if(debug){
369
fprintf(stderr, "Decrypted password is: ");
447
fprintf_plus(stderr, "Decrypted password is: ");
370
448
for(ssize_t i = 0; i < plaintext_length; i++){
371
449
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
372
450
}
394
472
/* GnuTLS log function callback */
395
473
static void debuggnutls(__attribute__((unused)) int level,
396
474
const char* string){
397
fprintf(stderr, "GnuTLS: %s", string);
475
fprintf_plus(stderr, "GnuTLS: %s", string);
398
476
}
399
477
400
478
static int init_gnutls_global(const char *pubkeyfilename,
402
480
int ret;
403
481
404
482
if(debug){
405
fprintf(stderr, "Initializing GnuTLS\n");
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
406
484
}
407
485
408
486
ret = gnutls_global_init();
409
487
if(ret != GNUTLS_E_SUCCESS){
410
fprintf(stderr, "GnuTLS global_init: %s\n",
411
safer_gnutls_strerror(ret));
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
412
490
return -1;
413
491
}
414
492
421
499
}
422
500
423
501
/* OpenPGP credentials */
424
gnutls_certificate_allocate_credentials(&mc.cred);
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
425
503
if(ret != GNUTLS_E_SUCCESS){
426
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
427
from
428
-Wunreachable-code
429
*/
430
safer_gnutls_strerror(ret));
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
431
506
gnutls_global_deinit();
432
507
return -1;
433
508
}
434
509
435
510
if(debug){
436
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
437
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
438
seckeyfilename);
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
439
515
}
440
516
441
517
ret = gnutls_certificate_set_openpgp_key_file
442
518
(mc.cred, pubkeyfilename, seckeyfilename,
443
519
GNUTLS_OPENPGP_FMT_BASE64);
444
520
if(ret != GNUTLS_E_SUCCESS){
445
fprintf(stderr,
446
"Error[%d] while reading the OpenPGP key pair ('%s',"
447
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
448
fprintf(stderr, "The GnuTLS error is: %s\n",
449
safer_gnutls_strerror(ret));
521
fprintf_plus(stderr,
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
450
526
goto globalfail;
451
527
}
452
528
453
529
/* GnuTLS server initialization */
454
530
ret = gnutls_dh_params_init(&mc.dh_params);
455
531
if(ret != GNUTLS_E_SUCCESS){
456
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
457
" %s\n", safer_gnutls_strerror(ret));
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
458
535
goto globalfail;
459
536
}
460
537
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
461
538
if(ret != GNUTLS_E_SUCCESS){
462
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
463
safer_gnutls_strerror(ret));
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
464
541
goto globalfail;
465
542
}
466
543
486
563
}
487
564
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
488
565
if(ret != GNUTLS_E_SUCCESS){
489
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
490
safer_gnutls_strerror(ret));
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
491
569
}
492
570
493
571
{
500
578
}
501
579
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
502
580
if(ret != GNUTLS_E_SUCCESS){
503
fprintf(stderr, "Syntax error at: %s\n", err);
504
fprintf(stderr, "GnuTLS error: %s\n",
505
safer_gnutls_strerror(ret));
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
506
584
gnutls_deinit(*session);
507
585
return -1;
508
586
}
517
595
}
518
596
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
519
597
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
521
safer_gnutls_strerror(ret));
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
522
600
gnutls_deinit(*session);
523
601
return -1;
524
602
}
569
647
pf = PF_INET;
570
648
break;
571
649
default:
572
fprintf(stderr, "Bad address family: %d\n", af);
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
573
651
errno = EINVAL;
574
652
return -1;
575
653
}
580
658
}
581
659
582
660
if(debug){
583
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
584
"\n", ip, port);
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
585
663
}
586
664
587
665
tcp_sd = socket(pf, SOCK_STREAM, 0);
588
666
if(tcp_sd < 0){
589
667
int e = errno;
590
perror("socket");
668
perror_plus("socket");
591
669
errno = e;
592
670
goto mandos_end;
593
671
}
607
685
}
608
686
if(ret < 0 ){
609
687
int e = errno;
610
perror("inet_pton");
688
perror_plus("inet_pton");
611
689
errno = e;
612
690
goto mandos_end;
613
691
}
614
692
if(ret == 0){
615
693
int e = errno;
616
fprintf(stderr, "Bad address: %s\n", ip);
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
617
695
errno = e;
618
696
goto mandos_end;
619
697
}
624
702
625
703
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
626
704
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
627
-Wunreachable-code*/
705
-Wunreachable-code*/
628
706
if(if_index == AVAHI_IF_UNSPEC){
629
fprintf(stderr, "An IPv6 link-local address is incomplete"
630
" without a network interface\n");
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
631
709
errno = EINVAL;
632
710
goto mandos_end;
633
711
}
649
727
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
650
728
char interface[IF_NAMESIZE];
651
729
if(if_indextoname((unsigned int)if_index, interface) == NULL){
652
perror("if_indextoname");
730
perror_plus("if_indextoname");
653
731
} else {
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
655
ip, interface, port);
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
656
734
}
657
735
} else {
658
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
659
port);
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
660
738
}
661
739
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
662
740
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
669
747
sizeof(addrstr));
670
748
}
671
749
if(pcret == NULL){
672
perror("inet_ntop");
750
perror_plus("inet_ntop");
673
751
} else {
674
752
if(strcmp(addrstr, ip) != 0){
675
fprintf(stderr, "Canonical address form: %s\n", addrstr);
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
676
754
}
677
755
}
678
756
}
688
766
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
689
767
}
690
768
if(ret < 0){
691
int e = errno;
692
perror("connect");
693
errno = e;
769
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
770
int e = errno;
771
perror_plus("connect");
772
errno = e;
773
}
694
774
goto mandos_end;
695
775
}
696
776
704
784
while(true){
705
785
size_t out_size = strlen(out);
706
786
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
707
out_size - written));
787
out_size - written));
708
788
if(ret == -1){
709
789
int e = errno;
710
perror("write");
790
perror_plus("write");
711
791
errno = e;
712
792
goto mandos_end;
713
793
}
730
810
}
731
811
732
812
if(debug){
733
fprintf(stderr, "Establishing TLS session with %s\n", ip);
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
734
814
}
735
815
736
816
if(quit_now){
738
818
goto mandos_end;
739
819
}
740
820
821
/* Spurious warning from -Wint-to-pointer-cast */
741
822
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
742
823
743
824
if(quit_now){
755
836
756
837
if(ret != GNUTLS_E_SUCCESS){
757
838
if(debug){
758
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
759
840
gnutls_perror(ret);
760
841
}
761
842
errno = EPROTO;
765
846
/* Read OpenPGP packet that contains the wanted password */
766
847
767
848
if(debug){
768
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
769
ip);
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
770
851
}
771
852
772
853
while(true){
777
858
}
778
859
779
860
buffer_capacity = incbuffer(&buffer, buffer_length,
780
buffer_capacity);
861
buffer_capacity);
781
862
if(buffer_capacity == 0){
782
863
int e = errno;
783
perror("incbuffer");
864
perror_plus("incbuffer");
784
865
errno = e;
785
866
goto mandos_end;
786
867
}
810
891
}
811
892
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
812
893
if(ret < 0){
813
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
814
896
gnutls_perror(ret);
815
897
errno = EPROTO;
816
898
goto mandos_end;
817
899
}
818
900
break;
819
901
default:
820
fprintf(stderr, "Unknown error while reading data from"
821
" encrypted session with Mandos server\n");
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
822
904
gnutls_bye(session, GNUTLS_SHUT_RDWR);
823
905
errno = EIO;
824
906
goto mandos_end;
829
911
}
830
912
831
913
if(debug){
832
fprintf(stderr, "Closing TLS session\n");
914
fprintf_plus(stderr, "Closing TLS session\n");
833
915
}
834
916
835
917
if(quit_now){
847
929
848
930
if(buffer_length > 0){
849
931
ssize_t decrypted_buffer_size;
850
decrypted_buffer_size = pgp_packet_decrypt(buffer,
851
buffer_length,
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
852
933
&decrypted_buffer);
853
934
if(decrypted_buffer_size >= 0){
854
935
865
946
if(ret == 0 and ferror(stdout)){
866
947
int e = errno;
867
948
if(debug){
868
fprintf(stderr, "Error writing encrypted data: %s\n",
869
strerror(errno));
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
870
951
}
871
952
errno = e;
872
953
goto mandos_end;
891
972
if(e == 0){
892
973
e = errno;
893
974
}
894
perror("close");
975
perror_plus("close");
895
976
}
896
977
gnutls_deinit(session);
978
errno = e;
897
979
if(quit_now){
898
e = EINTR;
980
errno = EINTR;
899
981
retval = -1;
900
982
}
901
errno = e;
902
983
}
903
984
return retval;
904
985
}
929
1010
switch(event){
930
1011
default:
931
1012
case AVAHI_RESOLVER_FAILURE:
932
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
933
" of type '%s' in domain '%s': %s\n", name, type, domain,
934
avahi_strerror(avahi_server_errno(mc.server)));
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
domain,
1016
avahi_strerror(avahi_server_errno(mc.server)));
935
1017
break;
936
1018
937
1019
case AVAHI_RESOLVER_FOUND:
939
1021
char ip[AVAHI_ADDRESS_STR_MAX];
940
1022
avahi_address_snprint(ip, sizeof(ip), address);
941
1023
if(debug){
942
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
943
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
944
ip, (intmax_t)interface, port);
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
945
1027
}
946
1028
int ret = start_mandos_communication(ip, port, interface,
947
1029
avahi_proto_to_af(proto));
948
1030
if(ret == 0){
949
1031
avahi_simple_poll_quit(mc.simple_poll);
1032
} else {
1033
ret = add_server(ip, port, interface,
1034
avahi_proto_to_af(proto));
950
1035
}
951
1036
}
952
1037
}
976
1061
default:
977
1062
case AVAHI_BROWSER_FAILURE:
978
1063
979
fprintf(stderr, "(Avahi browser) %s\n",
980
avahi_strerror(avahi_server_errno(mc.server)));
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
981
1066
avahi_simple_poll_quit(mc.simple_poll);
982
1067
return;
983
1068
990
1075
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
991
1076
name, type, domain, protocol, 0,
992
1077
resolve_callback, NULL) == NULL)
993
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
994
name, avahi_strerror(avahi_server_errno(mc.server)));
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
995
1081
break;
996
1082
997
1083
case AVAHI_BROWSER_REMOVE:
1000
1086
case AVAHI_BROWSER_ALL_FOR_NOW:
1001
1087
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1002
1088
if(debug){
1003
fprintf(stderr, "No Mandos server found, still searching...\n");
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1004
1091
}
1005
1092
break;
1006
1093
}
1007
1094
}
1008
1095
1009
/* stop main loop after sigterm has been called */
1096
/* Signal handler that stops main loop after SIGTERM */
1010
1097
static void handle_sigterm(int sig){
1011
1098
if(quit_now){
1012
1099
return;
1014
1101
quit_now = 1;
1015
1102
signal_received = sig;
1016
1103
int old_errno = errno;
1104
/* set main loop to exit */
1017
1105
if(mc.simple_poll != NULL){
1018
1106
avahi_simple_poll_quit(mc.simple_poll);
1019
1107
}
1020
1108
errno = old_errno;
1021
1109
}
1022
1110
1111
bool get_flags(const char *ifname, struct ifreq *ifr){
1112
int ret;
1113
1114
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1115
if(s < 0){
1116
perror_plus("socket");
1117
return false;
1118
}
1119
strcpy(ifr->ifr_name, ifname);
1120
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1121
if(ret == -1){
1122
if(debug){
1123
perror_plus("ioctl SIOCGIFFLAGS");
1124
}
1125
return false;
1126
}
1127
return true;
1128
}
1129
1130
bool good_flags(const char *ifname, const struct ifreq *ifr){
1131
1132
/* Reject the loopback device */
1133
if(ifr->ifr_flags & IFF_LOOPBACK){
1134
if(debug){
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1137
}
1138
return false;
1139
}
1140
/* Accept point-to-point devices only if connect_to is specified */
1141
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1142
if(debug){
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1145
}
1146
return true;
1147
}
1148
/* Otherwise, reject non-broadcast-capable devices */
1149
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1150
if(debug){
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1153
}
1154
return false;
1155
}
1156
/* Reject non-ARP interfaces (including dummy interfaces) */
1157
if(ifr->ifr_flags & IFF_NOARP){
1158
if(debug){
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1161
}
1162
return false;
1163
}
1164
1165
/* Accept this device */
1166
if(debug){
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1168
}
1169
return true;
1170
}
1171
1172
/*
1173
* This function determines if a directory entry in /sys/class/net
1174
* corresponds to an acceptable network device.
1175
* (This function is passed to scandir(3) as a filter function.)
1176
*/
1177
int good_interface(const struct dirent *if_entry){
1178
if(if_entry->d_name[0] == '.'){
1179
return 0;
1180
}
1181
1182
struct ifreq ifr;
1183
if(not get_flags(if_entry->d_name, &ifr)){
1184
if(debug){
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1187
}
1188
return 0;
1189
}
1190
1191
if(not good_flags(if_entry->d_name, &ifr)){
1192
return 0;
1193
}
1194
return 1;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device which is up.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int up_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_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1212
}
1213
return 0;
1214
}
1215
1216
/* Reject down interfaces */
1217
if(not (ifr.ifr_flags & IFF_UP)){
1218
if(debug){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1221
}
1222
return 0;
1223
}
1224
1225
/* Reject non-running interfaces */
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1230
}
1231
return 0;
1232
}
1233
1234
if(not good_flags(if_entry->d_name, &ifr)){
1235
return 0;
1236
}
1237
return 1;
1238
}
1239
1240
int notdotentries(const struct dirent *direntry){
1241
/* Skip "." and ".." */
1242
if(direntry->d_name[0] == '.'
1243
and (direntry->d_name[1] == '\0'
1244
or (direntry->d_name[1] == '.'
1245
and direntry->d_name[2] == '\0'))){
1246
return 0;
1247
}
1248
return 1;
1249
}
1250
1251
/* Is this directory entry a runnable program? */
1252
int runnable_hook(const struct dirent *direntry){
1253
int ret;
1254
size_t sret;
1255
struct stat st;
1256
1257
if((direntry->d_name)[0] == '\0'){
1258
/* Empty name? */
1259
return 0;
1260
}
1261
1262
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1263
"abcdefghijklmnopqrstuvwxyz"
1264
"0123456789"
1265
"_-");
1266
if((direntry->d_name)[sret] != '\0'){
1267
/* Contains non-allowed characters */
1268
if(debug){
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1270
direntry->d_name);
1271
}
1272
return 0;
1273
}
1274
1275
char *fullname = NULL;
1276
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
if(ret < 0){
1278
perror_plus("asprintf");
1279
return 0;
1280
}
1281
1282
ret = stat(fullname, &st);
1283
if(ret == -1){
1284
if(debug){
1285
perror_plus("Could not stat hook");
1286
}
1287
return 0;
1288
}
1289
if(not (S_ISREG(st.st_mode))){
1290
/* Not a regular file */
1291
if(debug){
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1294
}
1295
return 0;
1296
}
1297
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1298
/* Not executable */
1299
if(debug){
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1302
}
1303
return 0;
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1309
return 1;
1310
}
1311
1312
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1313
int ret;
1314
struct timespec now;
1315
struct timespec waited_time;
1316
intmax_t block_time;
1317
1318
while(true){
1319
if(mc.current_server == NULL){
1320
if (debug){
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1323
}
1324
ret = avahi_simple_poll_iterate(s, -1);
1325
} else {
1326
if (debug){
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1329
}
1330
/* the current time */
1331
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1332
if(ret == -1){
1333
perror_plus("clock_gettime");
1334
return -1;
1335
}
1336
/* Calculating in ms how long time between now and server
1337
who we visted longest time ago. Now - last seen. */
1338
waited_time.tv_sec = (now.tv_sec
1339
- mc.current_server->last_seen.tv_sec);
1340
waited_time.tv_nsec = (now.tv_nsec
1341
- mc.current_server->last_seen.tv_nsec);
1342
/* total time is 10s/10,000ms.
1343
Converting to s from ms by dividing by 1,000,
1344
and ns to ms by dividing by 1,000,000. */
1345
block_time = ((retry_interval
1346
- ((intmax_t)waited_time.tv_sec * 1000))
1347
- ((intmax_t)waited_time.tv_nsec / 1000000));
1348
1349
if (debug){
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1352
}
1353
1354
if(block_time <= 0){
1355
ret = start_mandos_communication(mc.current_server->ip,
1356
mc.current_server->port,
1357
mc.current_server->if_index,
1358
mc.current_server->af);
1359
if(ret == 0){
1360
avahi_simple_poll_quit(mc.simple_poll);
1361
return 0;
1362
}
1363
ret = clock_gettime(CLOCK_MONOTONIC,
1364
&mc.current_server->last_seen);
1365
if(ret == -1){
1366
perror_plus("clock_gettime");
1367
return -1;
1368
}
1369
mc.current_server = mc.current_server->next;
1370
block_time = 0; /* Call avahi to find new Mandos
1371
servers, but don't block */
1372
}
1373
1374
ret = avahi_simple_poll_iterate(s, (int)block_time);
1375
}
1376
if(ret != 0){
1377
if (ret > 0 or errno != EINTR){
1378
return (ret != 1) ? ret : 0;
1379
}
1380
}
1381
}
1382
}
1383
1384
bool run_network_hooks(const char *mode, const char *interface,
1385
const float delay){
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1388
int ret;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1390
alphasort);
1391
if(numhooks == -1){
1392
perror_plus("scandir");
1393
} else {
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
if(ret < 0){
1400
perror_plus("asprintf");
1401
continue;
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1407
pid_t hook_pid = fork();
1408
if(hook_pid == 0){
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
dup2(devnull, STDIN_FILENO);
1435
close(devnull);
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1438
if(ret == -1){
1439
perror_plus("setenv");
1440
_exit(EX_OSERR);
1441
}
1442
ret = setenv("DEVICE", interface, 1);
1443
if(ret == -1){
1444
perror_plus("setenv");
1445
_exit(EX_OSERR);
1446
}
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1448
if(ret == -1){
1449
perror_plus("setenv");
1450
_exit(EX_OSERR);
1451
}
1452
ret = setenv("MODE", mode, 1);
1453
if(ret == -1){
1454
perror_plus("setenv");
1455
_exit(EX_OSERR);
1456
}
1457
char *delaystring;
1458
ret = asprintf(&delaystring, "%f", delay);
1459
if(ret == -1){
1460
perror_plus("asprintf");
1461
_exit(EX_OSERR);
1462
}
1463
ret = setenv("DELAY", delaystring, 1);
1464
if(ret == -1){
1465
free(delaystring);
1466
perror_plus("setenv");
1467
_exit(EX_OSERR);
1468
}
1469
free(delaystring);
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1472
} else {
1473
int status;
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1475
perror_plus("waitpid");
1476
free(fullname);
1477
continue;
1478
}
1479
if(WIFEXITED(status)){
1480
if(WEXITSTATUS(status) != 0){
1481
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1482
" with status %d\n", direntry->d_name,
1483
WEXITSTATUS(status));
1484
free(fullname);
1485
continue;
1486
}
1487
} else if(WIFSIGNALED(status)){
1488
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1489
" signal %d\n", direntry->d_name,
1490
WTERMSIG(status));
1491
free(fullname);
1492
continue;
1493
} else {
1494
fprintf_plus(stderr, "Warning: network hook \"%s\""
1495
" crashed\n", direntry->d_name);
1496
free(fullname);
1497
continue;
1498
}
1499
}
1500
free(fullname);
1501
if(debug){
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1503
direntry->d_name);
1504
}
1505
}
1506
close(devnull);
1507
}
1508
return true;
1509
}
1510
1023
1511
int main(int argc, char *argv[]){
1024
1512
AvahiSServiceBrowser *sb = NULL;
1025
1513
int error;
1027
1515
intmax_t tmpmax;
1028
1516
char *tmp;
1029
1517
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1518
const char *interface = "";
1031
1519
struct ifreq network;
1032
1520
int sd = -1;
1033
1521
bool take_down_interface = false;
1034
1522
uid_t uid;
1035
1523
gid_t gid;
1036
char *connect_to = NULL;
1037
1524
char tempdir[] = "/tmp/mandosXXXXXX";
1038
1525
bool tempdir_created = false;
1039
1526
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1043
1530
bool gnutls_initialized = false;
1044
1531
bool gpgme_initialized = false;
1045
1532
float delay = 2.5f;
1533
double retry_interval = 10; /* 10s between trying a server and
1534
retrying the same server again */
1046
1535
1047
1536
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1048
1537
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1054
1543
errno = 0;
1055
1544
ret = setgid(gid);
1056
1545
if(ret == -1){
1057
perror("setgid");
1546
perror_plus("setgid");
1058
1547
}
1059
1548
1060
1549
/* Lower user privileges (temporarily) */
1061
1550
errno = 0;
1062
1551
ret = seteuid(uid);
1063
1552
if(ret == -1){
1064
perror("seteuid");
1553
perror_plus("seteuid");
1065
1554
}
1066
1555
1067
1556
if(quit_now){
1102
1591
.arg = "SECONDS",
1103
1592
.doc = "Maximum delay to wait for interface startup",
1104
1593
.group = 2 },
1594
{ .name = "retry", .key = 132,
1595
.arg = "SECONDS",
1596
.doc = "Retry interval used when denied by the mandos server",
1597
.group = 2 },
1598
{ .name = "network-hook-dir", .key = 133,
1599
.arg = "DIR",
1600
.doc = "Directory where network hooks are located",
1601
.group = 2 },
1105
1602
/*
1106
1603
* These reproduce what we would get without ARGP_NO_HELP
1107
1604
*/
1151
1648
if(errno != 0 or tmp == arg or *tmp != '\0'){
1152
1649
argp_error(state, "Bad delay");
1153
1650
}
1651
case 132: /* --retry */
1652
errno = 0;
1653
retry_interval = strtod(arg, &tmp);
1654
if(errno != 0 or tmp == arg or *tmp != '\0'
1655
or (retry_interval * 1000) > INT_MAX
1656
or retry_interval < 0){
1657
argp_error(state, "Bad retry interval");
1658
}
1659
break;
1660
case 133: /* --network-hook-dir */
1661
hookdir = arg;
1154
1662
break;
1155
1663
/*
1156
1664
* These reproduce what we would get without ARGP_NO_HELP
1163
1671
argp_state_help(state, state->out_stream,
1164
1672
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1165
1673
case 'V': /* --version */
1166
fprintf(state->out_stream, "%s\n", argp_program_version);
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1167
1677
exit(argp_err_exit_status);
1168
1678
break;
1169
1679
default:
1184
1694
case ENOMEM:
1185
1695
default:
1186
1696
errno = ret;
1187
perror("argp_parse");
1697
perror_plus("argp_parse");
1188
1698
exitcode = EX_OSERR;
1189
1699
goto end;
1190
1700
case EINVAL:
1192
1702
goto end;
1193
1703
}
1194
1704
}
1705
1706
{
1707
/* Work around Debian bug #633582:
1708
<http://bugs.debian.org/633582> */
1709
1710
/* Re-raise priviliges */
1711
errno = 0;
1712
ret = seteuid(0);
1713
if(ret == -1){
1714
perror_plus("seteuid");
1715
} else {
1716
struct stat st;
1717
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1722
} else {
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1724
if(ret == -1){
1725
perror_plus("fstat");
1726
} else {
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1730
if(ret == -1){
1731
perror_plus("fchown");
1732
}
1733
}
1734
}
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1736
}
1737
}
1738
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1743
} else {
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1745
if(ret == -1){
1746
perror_plus("fstat");
1747
} else {
1748
if(S_ISREG(st.st_mode)
1749
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
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
1772
}
1195
1773
1196
1774
if(not debug){
1197
1775
avahi_set_log_function(empty_log);
1198
1776
}
1199
1777
1778
if(interface[0] == '\0'){
1779
struct dirent **direntries;
1780
/* First look for interfaces that are up */
1781
ret = scandir(sys_class_net, &direntries, up_interface,
1782
alphasort);
1783
if(ret == 0){
1784
/* No up interfaces, look for any good interfaces */
1785
free(direntries);
1786
ret = scandir(sys_class_net, &direntries, good_interface,
1787
alphasort);
1788
}
1789
if(ret >= 1){
1790
/* Pick the first interface returned */
1791
interface = strdup(direntries[0]->d_name);
1792
if(debug){
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1794
}
1795
if(interface == NULL){
1796
perror_plus("malloc");
1797
free(direntries);
1798
exitcode = EXIT_FAILURE;
1799
goto end;
1800
}
1801
free(direntries);
1802
} else {
1803
free(direntries);
1804
fprintf_plus(stderr, "Could not find a network interface\n");
1805
exitcode = EXIT_FAILURE;
1806
goto end;
1807
}
1808
}
1809
1200
1810
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
1811
from the signal handler */
1202
1812
/* Initialize the pseudo-RNG for Avahi */
1203
1813
srand((unsigned int) time(NULL));
1204
1814
mc.simple_poll = avahi_simple_poll_new();
1205
1815
if(mc.simple_poll == NULL){
1206
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1816
fprintf_plus(stderr,
1817
"Avahi: Failed to create simple poll object.\n");
1207
1818
exitcode = EX_UNAVAILABLE;
1208
1819
goto end;
1209
1820
}
1211
1822
sigemptyset(&sigterm_action.sa_mask);
1212
1823
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1213
1824
if(ret == -1){
1214
perror("sigaddset");
1825
perror_plus("sigaddset");
1215
1826
exitcode = EX_OSERR;
1216
1827
goto end;
1217
1828
}
1218
1829
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1219
1830
if(ret == -1){
1220
perror("sigaddset");
1831
perror_plus("sigaddset");
1221
1832
exitcode = EX_OSERR;
1222
1833
goto end;
1223
1834
}
1224
1835
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1225
1836
if(ret == -1){
1226
perror("sigaddset");
1837
perror_plus("sigaddset");
1227
1838
exitcode = EX_OSERR;
1228
1839
goto end;
1229
1840
}
1233
1844
*/
1234
1845
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1235
1846
if(ret == -1){
1236
perror("sigaction");
1847
perror_plus("sigaction");
1237
1848
return EX_OSERR;
1238
1849
}
1239
1850
if(old_sigterm_action.sa_handler != SIG_IGN){
1240
1851
ret = sigaction(SIGINT, &sigterm_action, NULL);
1241
1852
if(ret == -1){
1242
perror("sigaction");
1853
perror_plus("sigaction");
1243
1854
exitcode = EX_OSERR;
1244
1855
goto end;
1245
1856
}
1246
1857
}
1247
1858
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1248
1859
if(ret == -1){
1249
perror("sigaction");
1860
perror_plus("sigaction");
1250
1861
return EX_OSERR;
1251
1862
}
1252
1863
if(old_sigterm_action.sa_handler != SIG_IGN){
1253
1864
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1254
1865
if(ret == -1){
1255
perror("sigaction");
1866
perror_plus("sigaction");
1256
1867
exitcode = EX_OSERR;
1257
1868
goto end;
1258
1869
}
1259
1870
}
1260
1871
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1261
1872
if(ret == -1){
1262
perror("sigaction");
1873
perror_plus("sigaction");
1263
1874
return EX_OSERR;
1264
1875
}
1265
1876
if(old_sigterm_action.sa_handler != SIG_IGN){
1266
1877
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1267
1878
if(ret == -1){
1268
perror("sigaction");
1879
perror_plus("sigaction");
1269
1880
exitcode = EX_OSERR;
1270
1881
goto end;
1271
1882
}
1272
1883
}
1273
1884
1274
1885
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
1886
if(strcmp(interface, "none") != 0){
1276
1887
if_index = (AvahiIfIndex) if_nametoindex(interface);
1277
1888
if(if_index == 0){
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1889
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1279
1890
exitcode = EX_UNAVAILABLE;
1280
1891
goto end;
1281
1892
}
1288
1899
errno = 0;
1289
1900
ret = seteuid(0);
1290
1901
if(ret == -1){
1291
perror("seteuid");
1902
perror_plus("seteuid");
1292
1903
}
1293
1904
1294
1905
#ifdef __linux__
1298
1909
bool restore_loglevel = true;
1299
1910
if(ret == -1){
1300
1911
restore_loglevel = false;
1301
perror("klogctl");
1912
perror_plus("klogctl");
1302
1913
}
1303
1914
#endif /* __linux__ */
1304
1915
1305
1916
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1306
1917
if(sd < 0){
1307
perror("socket");
1918
perror_plus("socket");
1308
1919
exitcode = EX_OSERR;
1309
1920
#ifdef __linux__
1310
1921
if(restore_loglevel){
1311
1922
ret = klogctl(7, NULL, 0);
1312
1923
if(ret == -1){
1313
perror("klogctl");
1924
perror_plus("klogctl");
1314
1925
}
1315
1926
}
1316
1927
#endif /* __linux__ */
1318
1929
errno = 0;
1319
1930
ret = seteuid(uid);
1320
1931
if(ret == -1){
1321
perror("seteuid");
1932
perror_plus("seteuid");
1322
1933
}
1323
1934
goto end;
1324
1935
}
1325
1936
strcpy(network.ifr_name, interface);
1326
1937
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1327
1938
if(ret == -1){
1328
perror("ioctl SIOCGIFFLAGS");
1939
perror_plus("ioctl SIOCGIFFLAGS");
1329
1940
#ifdef __linux__
1330
1941
if(restore_loglevel){
1331
1942
ret = klogctl(7, NULL, 0);
1332
1943
if(ret == -1){
1333
perror("klogctl");
1944
perror_plus("klogctl");
1334
1945
}
1335
1946
}
1336
1947
#endif /* __linux__ */
1339
1950
errno = 0;
1340
1951
ret = seteuid(uid);
1341
1952
if(ret == -1){
1342
perror("seteuid");
1953
perror_plus("seteuid");
1343
1954
}
1344
1955
goto end;
1345
1956
}
1349
1960
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1350
1961
if(ret == -1){
1351
1962
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1963
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1353
1964
exitcode = EX_OSERR;
1354
1965
#ifdef __linux__
1355
1966
if(restore_loglevel){
1356
1967
ret = klogctl(7, NULL, 0);
1357
1968
if(ret == -1){
1358
perror("klogctl");
1969
perror_plus("klogctl");
1359
1970
}
1360
1971
}
1361
1972
#endif /* __linux__ */
1363
1974
errno = 0;
1364
1975
ret = seteuid(uid);
1365
1976
if(ret == -1){
1366
perror("seteuid");
1977
perror_plus("seteuid");
1367
1978
}
1368
1979
goto end;
1369
1980
}
1370
1981
}
1371
/* sleep checking until interface is running */
1982
/* Sleep checking until interface is running.
1983
Check every 0.25s, up to total time of delay */
1372
1984
for(int i=0; i < delay * 4; i++){
1373
1985
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1374
1986
if(ret == -1){
1375
perror("ioctl SIOCGIFFLAGS");
1987
perror_plus("ioctl SIOCGIFFLAGS");
1376
1988
} else if(network.ifr_flags & IFF_RUNNING){
1377
1989
break;
1378
1990
}
1379
1991
struct timespec sleeptime = { .tv_nsec = 250000000 };
1380
1992
ret = nanosleep(&sleeptime, NULL);
1381
1993
if(ret == -1 and errno != EINTR){
1382
perror("nanosleep");
1994
perror_plus("nanosleep");
1383
1995
}
1384
1996
}
1385
1997
if(not take_down_interface){
1386
1998
/* We won't need the socket anymore */
1387
1999
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1388
2000
if(ret == -1){
1389
perror("close");
2001
perror_plus("close");
1390
2002
}
1391
2003
}
1392
2004
#ifdef __linux__
1394
2006
/* Restores kernel loglevel to default */
1395
2007
ret = klogctl(7, NULL, 0);
1396
2008
if(ret == -1){
1397
perror("klogctl");
2009
perror_plus("klogctl");
1398
2010
}
1399
2011
}
1400
2012
#endif /* __linux__ */
1401
2013
/* Lower privileges */
1402
2014
errno = 0;
1403
if(take_down_interface){
1404
/* Lower privileges */
1405
ret = seteuid(uid);
1406
if(ret == -1){
1407
perror("seteuid");
1408
}
1409
} else {
1410
/* Lower privileges permanently */
1411
ret = setuid(uid);
1412
if(ret == -1){
1413
perror("setuid");
1414
}
2015
/* Lower privileges */
2016
ret = seteuid(uid);
2017
if(ret == -1){
2018
perror_plus("seteuid");
1415
2019
}
1416
2020
}
1417
2021
1421
2025
1422
2026
ret = init_gnutls_global(pubkey, seckey);
1423
2027
if(ret == -1){
1424
fprintf(stderr, "init_gnutls_global failed\n");
2028
fprintf_plus(stderr, "init_gnutls_global failed\n");
1425
2029
exitcode = EX_UNAVAILABLE;
1426
2030
goto end;
1427
2031
} else {
1432
2036
goto end;
1433
2037
}
1434
2038
2039
if(mkdtemp(tempdir) == NULL){
2040
perror_plus("mkdtemp");
2041
goto end;
2042
}
1435
2043
tempdir_created = true;
1436
if(mkdtemp(tempdir) == NULL){
1437
tempdir_created = false;
1438
perror("mkdtemp");
1439
goto end;
1440
}
1441
2044
1442
2045
if(quit_now){
1443
2046
goto end;
1444
2047
}
1445
2048
1446
2049
if(not init_gpgme(pubkey, seckey, tempdir)){
1447
fprintf(stderr, "init_gpgme failed\n");
2050
fprintf_plus(stderr, "init_gpgme failed\n");
1448
2051
exitcode = EX_UNAVAILABLE;
1449
2052
goto end;
1450
2053
} else {
1460
2063
/* (Mainly meant for debugging) */
1461
2064
char *address = strrchr(connect_to, ':');
1462
2065
if(address == NULL){
1463
fprintf(stderr, "No colon in address\n");
2066
fprintf_plus(stderr, "No colon in address\n");
1464
2067
exitcode = EX_USAGE;
1465
2068
goto end;
1466
2069
}
1474
2077
tmpmax = strtoimax(address+1, &tmp, 10);
1475
2078
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1476
2079
or tmpmax != (uint16_t)tmpmax){
1477
fprintf(stderr, "Bad port number\n");
2080
fprintf_plus(stderr, "Bad port number\n");
1478
2081
exitcode = EX_USAGE;
1479
2082
goto end;
1480
2083
}
1485
2088
1486
2089
port = (uint16_t)tmpmax;
1487
2090
*address = '\0';
1488
address = connect_to;
1489
2091
/* Colon in address indicates IPv6 */
1490
2092
int af;
1491
if(strchr(address, ':') != NULL){
2093
if(strchr(connect_to, ':') != NULL){
1492
2094
af = AF_INET6;
2095
/* Accept [] around IPv6 address - see RFC 5952 */
2096
if(connect_to[0] == '[' and address[-1] == ']')
2097
{
2098
connect_to++;
2099
address[-1] = '\0';
2100
}
1493
2101
} else {
1494
2102
af = AF_INET;
1495
2103
}
2104
address = connect_to;
1496
2105
1497
2106
if(quit_now){
1498
2107
goto end;
1499
2108
}
1500
2109
1501
ret = start_mandos_communication(address, port, if_index, af);
1502
if(ret < 0){
1503
switch(errno){
1504
case ENETUNREACH:
1505
case EHOSTDOWN:
1506
case EHOSTUNREACH:
1507
exitcode = EX_NOHOST;
1508
break;
1509
case EINVAL:
1510
exitcode = EX_USAGE;
1511
break;
1512
case EIO:
1513
exitcode = EX_IOERR;
1514
break;
1515
case EPROTO:
1516
exitcode = EX_PROTOCOL;
1517
break;
1518
default:
1519
exitcode = EX_OSERR;
1520
break;
1521
}
1522
} else {
2110
while(not quit_now){
2111
ret = start_mandos_communication(address, port, if_index, af);
2112
if(quit_now or ret == 0){
2113
break;
2114
}
2115
if(debug){
2116
fprintf_plus(stderr, "Retrying in %d seconds\n",
2117
(int)retry_interval);
2118
}
2119
sleep((int)retry_interval);
2120
}
2121
2122
if (not quit_now){
1523
2123
exitcode = EXIT_SUCCESS;
1524
2124
}
2125
1525
2126
goto end;
1526
2127
}
1527
2128
1549
2150
1550
2151
/* Check if creating the Avahi server object succeeded */
1551
2152
if(mc.server == NULL){
1552
fprintf(stderr, "Failed to create Avahi server: %s\n",
1553
avahi_strerror(error));
2153
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2154
avahi_strerror(error));
1554
2155
exitcode = EX_UNAVAILABLE;
1555
2156
goto end;
1556
2157
}
1564
2165
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1565
2166
NULL, 0, browse_callback, NULL);
1566
2167
if(sb == NULL){
1567
fprintf(stderr, "Failed to create service browser: %s\n",
1568
avahi_strerror(avahi_server_errno(mc.server)));
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2169
avahi_strerror(avahi_server_errno(mc.server)));
1569
2170
exitcode = EX_UNAVAILABLE;
1570
2171
goto end;
1571
2172
}
1577
2178
/* Run the main loop */
1578
2179
1579
2180
if(debug){
1580
fprintf(stderr, "Starting Avahi loop search\n");
1581
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
2182
}
2183
2184
ret = avahi_loop_with_timeout(mc.simple_poll,
2185
(int)(retry_interval * 1000));
2186
if(debug){
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2189
}
1584
2190
1585
2191
end:
1586
2192
1587
2193
if(debug){
1588
fprintf(stderr, "%s exiting\n", argv[0]);
2194
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1589
2195
}
1590
2196
1591
2197
/* Cleanup things */
1608
2214
gpgme_release(mc.ctx);
1609
2215
}
1610
2216
1611
/* Take down the network interface */
1612
if(take_down_interface){
1613
/* Re-raise priviliges */
2217
/* Cleans up the circular linked list of Mandos servers the client
2218
has seen */
2219
if(mc.current_server != NULL){
2220
mc.current_server->prev->next = NULL;
2221
while(mc.current_server != NULL){
2222
server *next = mc.current_server->next;
2223
free(mc.current_server);
2224
mc.current_server = next;
2225
}
2226
}
2227
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2230
2231
/* Re-raise priviliges */
2232
{
1614
2233
errno = 0;
1615
2234
ret = seteuid(0);
1616
2235
if(ret == -1){
1617
perror("seteuid");
2236
perror_plus("seteuid");
1618
2237
}
1619
if(geteuid() == 0){
2238
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
1620
2241
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1621
2242
if(ret == -1){
1622
perror("ioctl SIOCGIFFLAGS");
1623
} else if(network.ifr_flags & IFF_UP) {
2243
perror_plus("ioctl SIOCGIFFLAGS");
2244
} else if(network.ifr_flags & IFF_UP){
1624
2245
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1625
2246
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1626
2247
if(ret == -1){
1627
perror("ioctl SIOCSIFFLAGS");
2248
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1628
2249
}
1629
2250
}
1630
2251
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1631
2252
if(ret == -1){
1632
perror("close");
1633
}
1634
/* Lower privileges permanently */
1635
errno = 0;
1636
ret = setuid(uid);
1637
if(ret == -1){
1638
perror("setuid");
2253
perror_plus("close");
1639
2254
}
1640
2255
}
1641
2256
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2262
}
1642
2263
1643
/* Removes the temp directory used by GPGME */
2264
/* Removes the GPGME temp directory and all files inside */
1644
2265
if(tempdir_created){
1645
DIR *d;
1646
struct dirent *direntry;
1647
d = opendir(tempdir);
1648
if(d == NULL){
1649
if(errno != ENOENT){
1650
perror("opendir");
1651
}
1652
} else {
1653
while(true){
1654
direntry = readdir(d);
1655
if(direntry == NULL){
1656
break;
1657
}
1658
/* Skip "." and ".." */
1659
if(direntry->d_name[0] == '.'
1660
and (direntry->d_name[1] == '\0'
1661
or (direntry->d_name[1] == '.'
1662
and direntry->d_name[2] == '\0'))){
1663
continue;
1664
}
2266
struct dirent **direntries = NULL;
2267
struct dirent *direntry = NULL;
2268
int numentries = scandir(tempdir, &direntries, notdotentries,
2269
alphasort);
2270
if (numentries > 0){
2271
for(int i = 0; i < numentries; i++){
2272
direntry = direntries[i];
1665
2273
char *fullname = NULL;
1666
2274
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
2275
direntry->d_name);
1668
2276
if(ret < 0){
1669
perror("asprintf");
2277
perror_plus("asprintf");
1670
2278
continue;
1671
2279
}
1672
2280
ret = remove(fullname);
1673
2281
if(ret == -1){
1674
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1675
strerror(errno));
2282
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2283
strerror(errno));
1676
2284
}
1677
2285
free(fullname);
1678
2286
}
1679
closedir(d);
2287
}
2288
2289
/* need to clean even if 0 because man page doesn't specify */
2290
free(direntries);
2291
if (numentries == -1){
2292
perror_plus("scandir");
1680
2293
}
1681
2294
ret = rmdir(tempdir);
1682
2295
if(ret == -1 and errno != ENOENT){
1683
perror("rmdir");
2296
perror_plus("rmdir");
1684
2297
}
1685
2298
}
1686
2299
1691
2304
&old_sigterm_action,
1692
2305
NULL));
1693
2306
if(ret == -1){
1694
perror("sigaction");
2307
perror_plus("sigaction");
1695
2308
}
1696
2309
do {
1697
2310
ret = raise(signal_received);
1698
2311
} while(ret != 0 and errno == EINTR);
1699
2312
if(ret != 0){
1700
perror("raise");
2313
perror_plus("raise");
1701
2314
abort();
1702
2315
}
1703
2316
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0