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- Committer: teddy at bsnet
- Date: 2011-12-24 23:17:02 UTC
- Revision ID: teddy@fukt.bsnet.se-20111224231702-1ffgu6r02p0bz9co
* plugins.d/splashy.c (error_plus): Check format string.
* plugins.d/askpass-fifo.c (error_plus): - '' -
* plugins.d/plymouth.c (error_plus): - '' -
* plugins.d/password-prompt.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
* plugins.d/askpass-fifo.c (error_plus): - '' -
* plugins.d/plymouth.c (error_plus): - '' -
* plugins.d/password-prompt.c (error_plus): - '' -
* plugins.d/usplash.c (error_plus): - '' -
- 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
__attribute__((format (gnu_printf, 2, 3)))
179
int fprintf_plus(FILE *stream, const char *format, ...){
180
va_list ap;
181
va_start (ap, format);
182
183
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
184
program_invocation_short_name));
185
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
186
}
187
150
188
/*
151
189
* Make additional room in "buffer" for at least BUFFER_SIZE more
152
190
* bytes. "buffer_capacity" is how much is currently allocated,
153
191
* "buffer_length" is how much is already used.
154
192
*/
155
193
size_t incbuffer(char **buffer, size_t buffer_length,
156
size_t buffer_capacity){
194
size_t buffer_capacity){
157
195
if(buffer_length + BUFFER_SIZE > buffer_capacity){
158
196
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
159
197
if(buffer == NULL){
164
202
return buffer_capacity;
165
203
}
166
204
205
/* Add server to set of servers to retry periodically */
206
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
int af){
208
int ret;
209
server *new_server = malloc(sizeof(server));
210
if(new_server == NULL){
211
perror_plus("malloc");
212
return false;
213
}
214
*new_server = (server){ .ip = strdup(ip),
215
.port = port,
216
.if_index = if_index,
217
.af = af };
218
if(new_server->ip == NULL){
219
perror_plus("strdup");
220
return false;
221
}
222
/* Special case of first server */
223
if (mc.current_server == NULL){
224
new_server->next = new_server;
225
new_server->prev = new_server;
226
mc.current_server = new_server;
227
/* Place the new server last in the list */
228
} else {
229
new_server->next = mc.current_server;
230
new_server->prev = mc.current_server->prev;
231
new_server->prev->next = new_server;
232
mc.current_server->prev = new_server;
233
}
234
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
235
if(ret == -1){
236
perror_plus("clock_gettime");
237
return false;
238
}
239
return true;
240
}
241
167
242
/*
168
243
* Initialize GPGME.
169
244
*/
170
static bool init_gpgme(const char *seckey,
171
const char *pubkey, const char *tempdir){
245
static bool init_gpgme(const char *seckey, const char *pubkey,
246
const char *tempdir){
172
247
gpgme_error_t rc;
173
248
gpgme_engine_info_t engine_info;
174
249
183
258
184
259
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
185
260
if(fd == -1){
186
perror("open");
261
perror_plus("open");
187
262
return false;
188
263
}
189
264
190
265
rc = gpgme_data_new_from_fd(&pgp_data, fd);
191
266
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));
267
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
268
gpgme_strsource(rc), gpgme_strerror(rc));
194
269
return false;
195
270
}
196
271
197
272
rc = gpgme_op_import(mc.ctx, pgp_data);
198
273
if(rc != GPG_ERR_NO_ERROR){
199
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
200
gpgme_strsource(rc), gpgme_strerror(rc));
274
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
275
gpgme_strsource(rc), gpgme_strerror(rc));
201
276
return false;
202
277
}
203
278
204
279
ret = (int)TEMP_FAILURE_RETRY(close(fd));
205
280
if(ret == -1){
206
perror("close");
281
perror_plus("close");
207
282
}
208
283
gpgme_data_release(pgp_data);
209
284
return true;
210
285
}
211
286
212
287
if(debug){
213
fprintf(stderr, "Initializing GPGME\n");
288
fprintf_plus(stderr, "Initializing GPGME\n");
214
289
}
215
290
216
291
/* Init GPGME */
217
292
gpgme_check_version(NULL);
218
293
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
219
294
if(rc != GPG_ERR_NO_ERROR){
220
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
221
gpgme_strsource(rc), gpgme_strerror(rc));
295
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
296
gpgme_strsource(rc), gpgme_strerror(rc));
222
297
return false;
223
298
}
224
299
225
/* Set GPGME home directory for the OpenPGP engine only */
300
/* Set GPGME home directory for the OpenPGP engine only */
226
301
rc = gpgme_get_engine_info(&engine_info);
227
302
if(rc != GPG_ERR_NO_ERROR){
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
229
gpgme_strsource(rc), gpgme_strerror(rc));
303
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
230
305
return false;
231
306
}
232
307
while(engine_info != NULL){
238
313
engine_info = engine_info->next;
239
314
}
240
315
if(engine_info == NULL){
241
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
316
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
317
tempdir);
242
318
return false;
243
319
}
244
320
245
321
/* Create new GPGME "context" */
246
322
rc = gpgme_new(&(mc.ctx));
247
323
if(rc != GPG_ERR_NO_ERROR){
248
fprintf(stderr, "bad gpgme_new: %s: %s\n",
249
gpgme_strsource(rc), gpgme_strerror(rc));
324
fprintf_plus(stderr, "Mandos plugin mandos-client: "
325
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
326
gpgme_strerror(rc));
250
327
return false;
251
328
}
252
329
271
348
ssize_t plaintext_length = 0;
272
349
273
350
if(debug){
274
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
351
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
275
352
}
276
353
277
354
/* Create new GPGME data buffer from memory cryptotext */
278
355
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
279
356
0);
280
357
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));
358
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
359
gpgme_strsource(rc), gpgme_strerror(rc));
283
360
return -1;
284
361
}
285
362
286
363
/* Create new empty GPGME data buffer for the plaintext */
287
364
rc = gpgme_data_new(&dh_plain);
288
365
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
366
fprintf_plus(stderr, "Mandos plugin mandos-client: "
367
"bad gpgme_data_new: %s: %s\n",
368
gpgme_strsource(rc), gpgme_strerror(rc));
291
369
gpgme_data_release(dh_crypto);
292
370
return -1;
293
371
}
296
374
data buffer */
297
375
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
298
376
if(rc != GPG_ERR_NO_ERROR){
299
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
377
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
378
gpgme_strsource(rc), gpgme_strerror(rc));
301
379
plaintext_length = -1;
302
380
if(debug){
303
381
gpgme_decrypt_result_t result;
304
382
result = gpgme_op_decrypt_result(mc.ctx);
305
383
if(result == NULL){
306
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
307
385
} 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);
386
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf_plus(stderr, "Wrong key usage: %u\n",
389
result->wrong_key_usage);
312
390
if(result->file_name != NULL){
313
fprintf(stderr, "File name: %s\n", result->file_name);
391
fprintf_plus(stderr, "File name: %s\n", result->file_name);
314
392
}
315
393
gpgme_recipient_t recipient;
316
394
recipient = result->recipients;
317
395
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");
396
fprintf_plus(stderr, "Public key algorithm: %s\n",
397
gpgme_pubkey_algo_name
398
(recipient->pubkey_algo));
399
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
400
fprintf_plus(stderr, "Secret key available: %s\n",
401
recipient->status == GPG_ERR_NO_SECKEY
402
? "No" : "Yes");
324
403
recipient = recipient->next;
325
404
}
326
405
}
329
408
}
330
409
331
410
if(debug){
332
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
411
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
333
412
}
334
413
335
414
/* Seek back to the beginning of the GPGME plaintext data buffer */
336
415
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
337
perror("gpgme_data_seek");
416
perror_plus("gpgme_data_seek");
338
417
plaintext_length = -1;
339
418
goto decrypt_end;
340
419
}
342
421
*plaintext = NULL;
343
422
while(true){
344
423
plaintext_capacity = incbuffer(plaintext,
345
(size_t)plaintext_length,
346
plaintext_capacity);
424
(size_t)plaintext_length,
425
plaintext_capacity);
347
426
if(plaintext_capacity == 0){
348
perror("incbuffer");
349
plaintext_length = -1;
350
goto decrypt_end;
427
perror_plus("incbuffer");
428
plaintext_length = -1;
429
goto decrypt_end;
351
430
}
352
431
353
432
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
358
437
break;
359
438
}
360
439
if(ret < 0){
361
perror("gpgme_data_read");
440
perror_plus("gpgme_data_read");
362
441
plaintext_length = -1;
363
442
goto decrypt_end;
364
443
}
366
445
}
367
446
368
447
if(debug){
369
fprintf(stderr, "Decrypted password is: ");
448
fprintf_plus(stderr, "Decrypted password is: ");
370
449
for(ssize_t i = 0; i < plaintext_length; i++){
371
450
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
372
451
}
394
473
/* GnuTLS log function callback */
395
474
static void debuggnutls(__attribute__((unused)) int level,
396
475
const char* string){
397
fprintf(stderr, "GnuTLS: %s", string);
476
fprintf_plus(stderr, "GnuTLS: %s", string);
398
477
}
399
478
400
479
static int init_gnutls_global(const char *pubkeyfilename,
402
481
int ret;
403
482
404
483
if(debug){
405
fprintf(stderr, "Initializing GnuTLS\n");
484
fprintf_plus(stderr, "Initializing GnuTLS\n");
406
485
}
407
486
408
487
ret = gnutls_global_init();
409
488
if(ret != GNUTLS_E_SUCCESS){
410
fprintf(stderr, "GnuTLS global_init: %s\n",
411
safer_gnutls_strerror(ret));
489
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
490
safer_gnutls_strerror(ret));
412
491
return -1;
413
492
}
414
493
421
500
}
422
501
423
502
/* OpenPGP credentials */
424
gnutls_certificate_allocate_credentials(&mc.cred);
503
ret = gnutls_certificate_allocate_credentials(&mc.cred);
425
504
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));
505
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
506
safer_gnutls_strerror(ret));
431
507
gnutls_global_deinit();
432
508
return -1;
433
509
}
434
510
435
511
if(debug){
436
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
437
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
438
seckeyfilename);
512
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
513
" secret key %s as GnuTLS credentials\n",
514
pubkeyfilename,
515
seckeyfilename);
439
516
}
440
517
441
518
ret = gnutls_certificate_set_openpgp_key_file
442
519
(mc.cred, pubkeyfilename, seckeyfilename,
443
520
GNUTLS_OPENPGP_FMT_BASE64);
444
521
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));
522
fprintf_plus(stderr,
523
"Error[%d] while reading the OpenPGP key pair ('%s',"
524
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
525
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
526
safer_gnutls_strerror(ret));
450
527
goto globalfail;
451
528
}
452
529
453
530
/* GnuTLS server initialization */
454
531
ret = gnutls_dh_params_init(&mc.dh_params);
455
532
if(ret != GNUTLS_E_SUCCESS){
456
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
457
" %s\n", safer_gnutls_strerror(ret));
533
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
534
" initialization: %s\n",
535
safer_gnutls_strerror(ret));
458
536
goto globalfail;
459
537
}
460
538
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
461
539
if(ret != GNUTLS_E_SUCCESS){
462
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
463
safer_gnutls_strerror(ret));
540
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
541
safer_gnutls_strerror(ret));
464
542
goto globalfail;
465
543
}
466
544
486
564
}
487
565
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
488
566
if(ret != GNUTLS_E_SUCCESS){
489
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
490
safer_gnutls_strerror(ret));
567
fprintf_plus(stderr,
568
"Error in GnuTLS session initialization: %s\n",
569
safer_gnutls_strerror(ret));
491
570
}
492
571
493
572
{
500
579
}
501
580
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
502
581
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));
582
fprintf_plus(stderr, "Syntax error at: %s\n", err);
583
fprintf_plus(stderr, "GnuTLS error: %s\n",
584
safer_gnutls_strerror(ret));
506
585
gnutls_deinit(*session);
507
586
return -1;
508
587
}
517
596
}
518
597
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
519
598
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
521
safer_gnutls_strerror(ret));
599
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
600
safer_gnutls_strerror(ret));
522
601
gnutls_deinit(*session);
523
602
return -1;
524
603
}
569
648
pf = PF_INET;
570
649
break;
571
650
default:
572
fprintf(stderr, "Bad address family: %d\n", af);
651
fprintf_plus(stderr, "Bad address family: %d\n", af);
573
652
errno = EINVAL;
574
653
return -1;
575
654
}
580
659
}
581
660
582
661
if(debug){
583
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
584
"\n", ip, port);
662
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
663
PRIu16 "\n", ip, port);
585
664
}
586
665
587
666
tcp_sd = socket(pf, SOCK_STREAM, 0);
588
667
if(tcp_sd < 0){
589
668
int e = errno;
590
perror("socket");
669
perror_plus("socket");
591
670
errno = e;
592
671
goto mandos_end;
593
672
}
607
686
}
608
687
if(ret < 0 ){
609
688
int e = errno;
610
perror("inet_pton");
689
perror_plus("inet_pton");
611
690
errno = e;
612
691
goto mandos_end;
613
692
}
614
693
if(ret == 0){
615
694
int e = errno;
616
fprintf(stderr, "Bad address: %s\n", ip);
695
fprintf_plus(stderr, "Bad address: %s\n", ip);
617
696
errno = e;
618
697
goto mandos_end;
619
698
}
624
703
625
704
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
626
705
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
627
-Wunreachable-code*/
706
-Wunreachable-code*/
628
707
if(if_index == AVAHI_IF_UNSPEC){
629
fprintf(stderr, "An IPv6 link-local address is incomplete"
630
" without a network interface\n");
708
fprintf_plus(stderr, "An IPv6 link-local address is"
709
" incomplete without a network interface\n");
631
710
errno = EINVAL;
632
711
goto mandos_end;
633
712
}
649
728
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
650
729
char interface[IF_NAMESIZE];
651
730
if(if_indextoname((unsigned int)if_index, interface) == NULL){
652
perror("if_indextoname");
731
perror_plus("if_indextoname");
653
732
} else {
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
655
ip, interface, port);
733
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
734
"\n", ip, interface, port);
656
735
}
657
736
} else {
658
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
659
port);
737
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
738
ip, port);
660
739
}
661
740
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
662
741
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
669
748
sizeof(addrstr));
670
749
}
671
750
if(pcret == NULL){
672
perror("inet_ntop");
751
perror_plus("inet_ntop");
673
752
} else {
674
753
if(strcmp(addrstr, ip) != 0){
675
fprintf(stderr, "Canonical address form: %s\n", addrstr);
754
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
676
755
}
677
756
}
678
757
}
688
767
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
689
768
}
690
769
if(ret < 0){
691
int e = errno;
692
perror("connect");
693
errno = e;
770
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
int e = errno;
772
perror_plus("connect");
773
errno = e;
774
}
694
775
goto mandos_end;
695
776
}
696
777
704
785
while(true){
705
786
size_t out_size = strlen(out);
706
787
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
707
out_size - written));
788
out_size - written));
708
789
if(ret == -1){
709
790
int e = errno;
710
perror("write");
791
perror_plus("write");
711
792
errno = e;
712
793
goto mandos_end;
713
794
}
730
811
}
731
812
732
813
if(debug){
733
fprintf(stderr, "Establishing TLS session with %s\n", ip);
814
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
734
815
}
735
816
736
817
if(quit_now){
738
819
goto mandos_end;
739
820
}
740
821
822
/* Spurious warning from -Wint-to-pointer-cast */
741
823
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
742
824
743
825
if(quit_now){
755
837
756
838
if(ret != GNUTLS_E_SUCCESS){
757
839
if(debug){
758
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
840
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
759
841
gnutls_perror(ret);
760
842
}
761
843
errno = EPROTO;
765
847
/* Read OpenPGP packet that contains the wanted password */
766
848
767
849
if(debug){
768
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
769
ip);
850
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
851
" %s\n", ip);
770
852
}
771
853
772
854
while(true){
777
859
}
778
860
779
861
buffer_capacity = incbuffer(&buffer, buffer_length,
780
buffer_capacity);
862
buffer_capacity);
781
863
if(buffer_capacity == 0){
782
864
int e = errno;
783
perror("incbuffer");
865
perror_plus("incbuffer");
784
866
errno = e;
785
867
goto mandos_end;
786
868
}
810
892
}
811
893
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
812
894
if(ret < 0){
813
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
895
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
896
"***\n");
814
897
gnutls_perror(ret);
815
898
errno = EPROTO;
816
899
goto mandos_end;
817
900
}
818
901
break;
819
902
default:
820
fprintf(stderr, "Unknown error while reading data from"
821
" encrypted session with Mandos server\n");
903
fprintf_plus(stderr, "Unknown error while reading data from"
904
" encrypted session with Mandos server\n");
822
905
gnutls_bye(session, GNUTLS_SHUT_RDWR);
823
906
errno = EIO;
824
907
goto mandos_end;
829
912
}
830
913
831
914
if(debug){
832
fprintf(stderr, "Closing TLS session\n");
915
fprintf_plus(stderr, "Closing TLS session\n");
833
916
}
834
917
835
918
if(quit_now){
847
930
848
931
if(buffer_length > 0){
849
932
ssize_t decrypted_buffer_size;
850
decrypted_buffer_size = pgp_packet_decrypt(buffer,
851
buffer_length,
933
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
852
934
&decrypted_buffer);
853
935
if(decrypted_buffer_size >= 0){
854
936
865
947
if(ret == 0 and ferror(stdout)){
866
948
int e = errno;
867
949
if(debug){
868
fprintf(stderr, "Error writing encrypted data: %s\n",
869
strerror(errno));
950
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
951
strerror(errno));
870
952
}
871
953
errno = e;
872
954
goto mandos_end;
891
973
if(e == 0){
892
974
e = errno;
893
975
}
894
perror("close");
976
perror_plus("close");
895
977
}
896
978
gnutls_deinit(session);
979
errno = e;
897
980
if(quit_now){
898
e = EINTR;
981
errno = EINTR;
899
982
retval = -1;
900
983
}
901
errno = e;
902
984
}
903
985
return retval;
904
986
}
929
1011
switch(event){
930
1012
default:
931
1013
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)));
1014
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1015
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1016
domain,
1017
avahi_strerror(avahi_server_errno(mc.server)));
935
1018
break;
936
1019
937
1020
case AVAHI_RESOLVER_FOUND:
939
1022
char ip[AVAHI_ADDRESS_STR_MAX];
940
1023
avahi_address_snprint(ip, sizeof(ip), address);
941
1024
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);
1025
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1026
PRIdMAX ") on port %" PRIu16 "\n", name,
1027
host_name, ip, (intmax_t)interface, port);
945
1028
}
946
1029
int ret = start_mandos_communication(ip, port, interface,
947
1030
avahi_proto_to_af(proto));
948
1031
if(ret == 0){
949
1032
avahi_simple_poll_quit(mc.simple_poll);
1033
} else {
1034
if(not add_server(ip, port, interface,
1035
avahi_proto_to_af(proto))){
1036
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1037
" list\n", name);
1038
}
950
1039
}
951
1040
}
952
1041
}
976
1065
default:
977
1066
case AVAHI_BROWSER_FAILURE:
978
1067
979
fprintf(stderr, "(Avahi browser) %s\n",
980
avahi_strerror(avahi_server_errno(mc.server)));
1068
fprintf_plus(stderr, "(Avahi browser) %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
981
1070
avahi_simple_poll_quit(mc.simple_poll);
982
1071
return;
983
1072
990
1079
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
991
1080
name, type, domain, protocol, 0,
992
1081
resolve_callback, NULL) == NULL)
993
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
994
name, avahi_strerror(avahi_server_errno(mc.server)));
1082
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1083
" %s\n", name,
1084
avahi_strerror(avahi_server_errno(mc.server)));
995
1085
break;
996
1086
997
1087
case AVAHI_BROWSER_REMOVE:
1000
1090
case AVAHI_BROWSER_ALL_FOR_NOW:
1001
1091
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1002
1092
if(debug){
1003
fprintf(stderr, "No Mandos server found, still searching...\n");
1093
fprintf_plus(stderr, "No Mandos server found, still"
1094
" searching...\n");
1004
1095
}
1005
1096
break;
1006
1097
}
1007
1098
}
1008
1099
1009
/* stop main loop after sigterm has been called */
1100
/* Signal handler that stops main loop after SIGTERM */
1010
1101
static void handle_sigterm(int sig){
1011
1102
if(quit_now){
1012
1103
return;
1014
1105
quit_now = 1;
1015
1106
signal_received = sig;
1016
1107
int old_errno = errno;
1108
/* set main loop to exit */
1017
1109
if(mc.simple_poll != NULL){
1018
1110
avahi_simple_poll_quit(mc.simple_poll);
1019
1111
}
1020
1112
errno = old_errno;
1021
1113
}
1022
1114
1115
bool get_flags(const char *ifname, struct ifreq *ifr){
1116
int ret;
1117
1118
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1119
if(s < 0){
1120
perror_plus("socket");
1121
return false;
1122
}
1123
strcpy(ifr->ifr_name, ifname);
1124
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1125
if(ret == -1){
1126
if(debug){
1127
perror_plus("ioctl SIOCGIFFLAGS");
1128
}
1129
return false;
1130
}
1131
return true;
1132
}
1133
1134
bool good_flags(const char *ifname, const struct ifreq *ifr){
1135
1136
/* Reject the loopback device */
1137
if(ifr->ifr_flags & IFF_LOOPBACK){
1138
if(debug){
1139
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1140
ifname);
1141
}
1142
return false;
1143
}
1144
/* Accept point-to-point devices only if connect_to is specified */
1145
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1146
if(debug){
1147
fprintf_plus(stderr, "Accepting point-to-point interface"
1148
" \"%s\"\n", ifname);
1149
}
1150
return true;
1151
}
1152
/* Otherwise, reject non-broadcast-capable devices */
1153
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1154
if(debug){
1155
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1156
" \"%s\"\n", ifname);
1157
}
1158
return false;
1159
}
1160
/* Reject non-ARP interfaces (including dummy interfaces) */
1161
if(ifr->ifr_flags & IFF_NOARP){
1162
if(debug){
1163
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1164
ifname);
1165
}
1166
return false;
1167
}
1168
1169
/* Accept this device */
1170
if(debug){
1171
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1172
}
1173
return true;
1174
}
1175
1176
/*
1177
* This function determines if a directory entry in /sys/class/net
1178
* corresponds to an acceptable network device.
1179
* (This function is passed to scandir(3) as a filter function.)
1180
*/
1181
int good_interface(const struct dirent *if_entry){
1182
if(if_entry->d_name[0] == '.'){
1183
return 0;
1184
}
1185
1186
struct ifreq ifr;
1187
if(not get_flags(if_entry->d_name, &ifr)){
1188
if(debug){
1189
fprintf_plus(stderr, "Failed to get flags for interface "
1190
"\"%s\"\n", if_entry->d_name);
1191
}
1192
return 0;
1193
}
1194
1195
if(not good_flags(if_entry->d_name, &ifr)){
1196
return 0;
1197
}
1198
return 1;
1199
}
1200
1201
/*
1202
* This function determines if a directory entry in /sys/class/net
1203
* corresponds to an acceptable network device which is up.
1204
* (This function is passed to scandir(3) as a filter function.)
1205
*/
1206
int up_interface(const struct dirent *if_entry){
1207
if(if_entry->d_name[0] == '.'){
1208
return 0;
1209
}
1210
1211
struct ifreq ifr;
1212
if(not get_flags(if_entry->d_name, &ifr)){
1213
if(debug){
1214
fprintf_plus(stderr, "Failed to get flags for interface "
1215
"\"%s\"\n", if_entry->d_name);
1216
}
1217
return 0;
1218
}
1219
1220
/* Reject down interfaces */
1221
if(not (ifr.ifr_flags & IFF_UP)){
1222
if(debug){
1223
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
if_entry->d_name);
1225
}
1226
return 0;
1227
}
1228
1229
/* Reject non-running interfaces */
1230
if(not (ifr.ifr_flags & IFF_RUNNING)){
1231
if(debug){
1232
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if_entry->d_name);
1234
}
1235
return 0;
1236
}
1237
1238
if(not good_flags(if_entry->d_name, &ifr)){
1239
return 0;
1240
}
1241
return 1;
1242
}
1243
1244
int notdotentries(const struct dirent *direntry){
1245
/* Skip "." and ".." */
1246
if(direntry->d_name[0] == '.'
1247
and (direntry->d_name[1] == '\0'
1248
or (direntry->d_name[1] == '.'
1249
and direntry->d_name[2] == '\0'))){
1250
return 0;
1251
}
1252
return 1;
1253
}
1254
1255
/* Is this directory entry a runnable program? */
1256
int runnable_hook(const struct dirent *direntry){
1257
int ret;
1258
size_t sret;
1259
struct stat st;
1260
1261
if((direntry->d_name)[0] == '\0'){
1262
/* Empty name? */
1263
return 0;
1264
}
1265
1266
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1267
"abcdefghijklmnopqrstuvwxyz"
1268
"0123456789"
1269
"_-");
1270
if((direntry->d_name)[sret] != '\0'){
1271
/* Contains non-allowed characters */
1272
if(debug){
1273
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
direntry->d_name);
1275
}
1276
return 0;
1277
}
1278
1279
char *fullname = NULL;
1280
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1281
if(ret < 0){
1282
perror_plus("asprintf");
1283
return 0;
1284
}
1285
1286
ret = stat(fullname, &st);
1287
if(ret == -1){
1288
if(debug){
1289
perror_plus("Could not stat hook");
1290
}
1291
return 0;
1292
}
1293
if(not (S_ISREG(st.st_mode))){
1294
/* Not a regular file */
1295
if(debug){
1296
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1297
direntry->d_name);
1298
}
1299
return 0;
1300
}
1301
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1302
/* Not executable */
1303
if(debug){
1304
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
direntry->d_name);
1306
}
1307
return 0;
1308
}
1309
if(debug){
1310
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1311
direntry->d_name);
1312
}
1313
return 1;
1314
}
1315
1316
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1317
int ret;
1318
struct timespec now;
1319
struct timespec waited_time;
1320
intmax_t block_time;
1321
1322
while(true){
1323
if(mc.current_server == NULL){
1324
if (debug){
1325
fprintf_plus(stderr, "Wait until first server is found."
1326
" No timeout!\n");
1327
}
1328
ret = avahi_simple_poll_iterate(s, -1);
1329
} else {
1330
if (debug){
1331
fprintf_plus(stderr, "Check current_server if we should run"
1332
" it, or wait\n");
1333
}
1334
/* the current time */
1335
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1336
if(ret == -1){
1337
perror_plus("clock_gettime");
1338
return -1;
1339
}
1340
/* Calculating in ms how long time between now and server
1341
who we visted longest time ago. Now - last seen. */
1342
waited_time.tv_sec = (now.tv_sec
1343
- mc.current_server->last_seen.tv_sec);
1344
waited_time.tv_nsec = (now.tv_nsec
1345
- mc.current_server->last_seen.tv_nsec);
1346
/* total time is 10s/10,000ms.
1347
Converting to s from ms by dividing by 1,000,
1348
and ns to ms by dividing by 1,000,000. */
1349
block_time = ((retry_interval
1350
- ((intmax_t)waited_time.tv_sec * 1000))
1351
- ((intmax_t)waited_time.tv_nsec / 1000000));
1352
1353
if (debug){
1354
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1355
block_time);
1356
}
1357
1358
if(block_time <= 0){
1359
ret = start_mandos_communication(mc.current_server->ip,
1360
mc.current_server->port,
1361
mc.current_server->if_index,
1362
mc.current_server->af);
1363
if(ret == 0){
1364
avahi_simple_poll_quit(mc.simple_poll);
1365
return 0;
1366
}
1367
ret = clock_gettime(CLOCK_MONOTONIC,
1368
&mc.current_server->last_seen);
1369
if(ret == -1){
1370
perror_plus("clock_gettime");
1371
return -1;
1372
}
1373
mc.current_server = mc.current_server->next;
1374
block_time = 0; /* Call avahi to find new Mandos
1375
servers, but don't block */
1376
}
1377
1378
ret = avahi_simple_poll_iterate(s, (int)block_time);
1379
}
1380
if(ret != 0){
1381
if (ret > 0 or errno != EINTR){
1382
return (ret != 1) ? ret : 0;
1383
}
1384
}
1385
}
1386
}
1387
1388
bool run_network_hooks(const char *mode, const char *interface,
1389
const float delay){
1390
struct dirent **direntries;
1391
struct dirent *direntry;
1392
int ret;
1393
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1394
alphasort);
1395
if(numhooks == -1){
1396
perror_plus("scandir");
1397
} else {
1398
int devnull = open("/dev/null", O_RDONLY);
1399
for(int i = 0; i < numhooks; i++){
1400
direntry = direntries[i];
1401
char *fullname = NULL;
1402
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1403
if(ret < 0){
1404
perror_plus("asprintf");
1405
continue;
1406
}
1407
if(debug){
1408
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1409
direntry->d_name);
1410
}
1411
pid_t hook_pid = fork();
1412
if(hook_pid == 0){
1413
/* Child */
1414
/* Raise privileges */
1415
errno = 0;
1416
ret = seteuid(0);
1417
if(ret == -1){
1418
perror_plus("seteuid");
1419
}
1420
/* Raise privileges even more */
1421
errno = 0;
1422
ret = setuid(0);
1423
if(ret == -1){
1424
perror_plus("setuid");
1425
}
1426
/* Set group */
1427
errno = 0;
1428
ret = setgid(0);
1429
if(ret == -1){
1430
perror_plus("setgid");
1431
}
1432
/* Reset supplementary groups */
1433
errno = 0;
1434
ret = setgroups(0, NULL);
1435
if(ret == -1){
1436
perror_plus("setgroups");
1437
}
1438
dup2(devnull, STDIN_FILENO);
1439
close(devnull);
1440
dup2(STDERR_FILENO, STDOUT_FILENO);
1441
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1442
if(ret == -1){
1443
perror_plus("setenv");
1444
_exit(EX_OSERR);
1445
}
1446
ret = setenv("DEVICE", interface, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("MODE", mode, 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
char *delaystring;
1462
ret = asprintf(&delaystring, "%f", delay);
1463
if(ret == -1){
1464
perror_plus("asprintf");
1465
_exit(EX_OSERR);
1466
}
1467
ret = setenv("DELAY", delaystring, 1);
1468
if(ret == -1){
1469
free(delaystring);
1470
perror_plus("setenv");
1471
_exit(EX_OSERR);
1472
}
1473
free(delaystring);
1474
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1475
perror_plus("execl");
1476
_exit(EXIT_FAILURE);
1477
}
1478
} else {
1479
int status;
1480
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1481
perror_plus("waitpid");
1482
free(fullname);
1483
continue;
1484
}
1485
if(WIFEXITED(status)){
1486
if(WEXITSTATUS(status) != 0){
1487
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1488
" with status %d\n", direntry->d_name,
1489
WEXITSTATUS(status));
1490
free(fullname);
1491
continue;
1492
}
1493
} else if(WIFSIGNALED(status)){
1494
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1495
" signal %d\n", direntry->d_name,
1496
WTERMSIG(status));
1497
free(fullname);
1498
continue;
1499
} else {
1500
fprintf_plus(stderr, "Warning: network hook \"%s\""
1501
" crashed\n", direntry->d_name);
1502
free(fullname);
1503
continue;
1504
}
1505
}
1506
free(fullname);
1507
if(debug){
1508
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1509
direntry->d_name);
1510
}
1511
}
1512
close(devnull);
1513
}
1514
return true;
1515
}
1516
1023
1517
int main(int argc, char *argv[]){
1024
1518
AvahiSServiceBrowser *sb = NULL;
1025
1519
int error;
1027
1521
intmax_t tmpmax;
1028
1522
char *tmp;
1029
1523
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1524
const char *interface = "";
1031
1525
struct ifreq network;
1032
1526
int sd = -1;
1033
1527
bool take_down_interface = false;
1034
1528
uid_t uid;
1035
1529
gid_t gid;
1036
char *connect_to = NULL;
1037
1530
char tempdir[] = "/tmp/mandosXXXXXX";
1038
1531
bool tempdir_created = false;
1039
1532
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1043
1536
bool gnutls_initialized = false;
1044
1537
bool gpgme_initialized = false;
1045
1538
float delay = 2.5f;
1539
double retry_interval = 10; /* 10s between trying a server and
1540
retrying the same server again */
1046
1541
1047
1542
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1048
1543
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1054
1549
errno = 0;
1055
1550
ret = setgid(gid);
1056
1551
if(ret == -1){
1057
perror("setgid");
1552
perror_plus("setgid");
1058
1553
}
1059
1554
1060
1555
/* Lower user privileges (temporarily) */
1061
1556
errno = 0;
1062
1557
ret = seteuid(uid);
1063
1558
if(ret == -1){
1064
perror("seteuid");
1559
perror_plus("seteuid");
1065
1560
}
1066
1561
1067
1562
if(quit_now){
1102
1597
.arg = "SECONDS",
1103
1598
.doc = "Maximum delay to wait for interface startup",
1104
1599
.group = 2 },
1600
{ .name = "retry", .key = 132,
1601
.arg = "SECONDS",
1602
.doc = "Retry interval used when denied by the mandos server",
1603
.group = 2 },
1604
{ .name = "network-hook-dir", .key = 133,
1605
.arg = "DIR",
1606
.doc = "Directory where network hooks are located",
1607
.group = 2 },
1105
1608
/*
1106
1609
* These reproduce what we would get without ARGP_NO_HELP
1107
1610
*/
1151
1654
if(errno != 0 or tmp == arg or *tmp != '\0'){
1152
1655
argp_error(state, "Bad delay");
1153
1656
}
1657
case 132: /* --retry */
1658
errno = 0;
1659
retry_interval = strtod(arg, &tmp);
1660
if(errno != 0 or tmp == arg or *tmp != '\0'
1661
or (retry_interval * 1000) > INT_MAX
1662
or retry_interval < 0){
1663
argp_error(state, "Bad retry interval");
1664
}
1665
break;
1666
case 133: /* --network-hook-dir */
1667
hookdir = arg;
1154
1668
break;
1155
1669
/*
1156
1670
* These reproduce what we would get without ARGP_NO_HELP
1163
1677
argp_state_help(state, state->out_stream,
1164
1678
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1165
1679
case 'V': /* --version */
1166
fprintf(state->out_stream, "%s\n", argp_program_version);
1680
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1167
1681
exit(argp_err_exit_status);
1168
1682
break;
1169
1683
default:
1184
1698
case ENOMEM:
1185
1699
default:
1186
1700
errno = ret;
1187
perror("argp_parse");
1701
perror_plus("argp_parse");
1188
1702
exitcode = EX_OSERR;
1189
1703
goto end;
1190
1704
case EINVAL:
1192
1706
goto end;
1193
1707
}
1194
1708
}
1709
1710
{
1711
/* Work around Debian bug #633582:
1712
<http://bugs.debian.org/633582> */
1713
1714
/* Re-raise priviliges */
1715
errno = 0;
1716
ret = seteuid(0);
1717
if(ret == -1){
1718
perror_plus("seteuid");
1719
} else {
1720
struct stat st;
1721
1722
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1723
int seckey_fd = open(seckey, O_RDONLY);
1724
if(seckey_fd == -1){
1725
perror_plus("open");
1726
} else {
1727
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1728
if(ret == -1){
1729
perror_plus("fstat");
1730
} else {
1731
if(S_ISREG(st.st_mode)
1732
and st.st_uid == 0 and st.st_gid == 0){
1733
ret = fchown(seckey_fd, uid, gid);
1734
if(ret == -1){
1735
perror_plus("fchown");
1736
}
1737
}
1738
}
1739
TEMP_FAILURE_RETRY(close(seckey_fd));
1740
}
1741
}
1742
1743
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1744
int pubkey_fd = open(pubkey, O_RDONLY);
1745
if(pubkey_fd == -1){
1746
perror_plus("open");
1747
} else {
1748
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1749
if(ret == -1){
1750
perror_plus("fstat");
1751
} else {
1752
if(S_ISREG(st.st_mode)
1753
and st.st_uid == 0 and st.st_gid == 0){
1754
ret = fchown(pubkey_fd, uid, gid);
1755
if(ret == -1){
1756
perror_plus("fchown");
1757
}
1758
}
1759
}
1760
TEMP_FAILURE_RETRY(close(pubkey_fd));
1761
}
1762
}
1763
1764
/* Lower privileges */
1765
errno = 0;
1766
ret = seteuid(uid);
1767
if(ret == -1){
1768
perror_plus("seteuid");
1769
}
1770
}
1771
}
1772
1773
/* Run network hooks */
1774
if(not run_network_hooks("start", interface, delay)){
1775
goto end;
1776
}
1195
1777
1196
1778
if(not debug){
1197
1779
avahi_set_log_function(empty_log);
1198
1780
}
1199
1781
1782
if(interface[0] == '\0'){
1783
struct dirent **direntries;
1784
/* First look for interfaces that are up */
1785
ret = scandir(sys_class_net, &direntries, up_interface,
1786
alphasort);
1787
if(ret == 0){
1788
/* No up interfaces, look for any good interfaces */
1789
free(direntries);
1790
ret = scandir(sys_class_net, &direntries, good_interface,
1791
alphasort);
1792
}
1793
if(ret >= 1){
1794
/* Pick the first interface returned */
1795
interface = strdup(direntries[0]->d_name);
1796
if(debug){
1797
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1798
}
1799
if(interface == NULL){
1800
perror_plus("malloc");
1801
free(direntries);
1802
exitcode = EXIT_FAILURE;
1803
goto end;
1804
}
1805
free(direntries);
1806
} else {
1807
free(direntries);
1808
fprintf_plus(stderr, "Could not find a network interface\n");
1809
exitcode = EXIT_FAILURE;
1810
goto end;
1811
}
1812
}
1813
1200
1814
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
1815
from the signal handler */
1202
1816
/* Initialize the pseudo-RNG for Avahi */
1203
1817
srand((unsigned int) time(NULL));
1204
1818
mc.simple_poll = avahi_simple_poll_new();
1205
1819
if(mc.simple_poll == NULL){
1206
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1820
fprintf_plus(stderr,
1821
"Avahi: Failed to create simple poll object.\n");
1207
1822
exitcode = EX_UNAVAILABLE;
1208
1823
goto end;
1209
1824
}
1211
1826
sigemptyset(&sigterm_action.sa_mask);
1212
1827
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1213
1828
if(ret == -1){
1214
perror("sigaddset");
1829
perror_plus("sigaddset");
1215
1830
exitcode = EX_OSERR;
1216
1831
goto end;
1217
1832
}
1218
1833
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1219
1834
if(ret == -1){
1220
perror("sigaddset");
1835
perror_plus("sigaddset");
1221
1836
exitcode = EX_OSERR;
1222
1837
goto end;
1223
1838
}
1224
1839
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1225
1840
if(ret == -1){
1226
perror("sigaddset");
1841
perror_plus("sigaddset");
1227
1842
exitcode = EX_OSERR;
1228
1843
goto end;
1229
1844
}
1233
1848
*/
1234
1849
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1235
1850
if(ret == -1){
1236
perror("sigaction");
1851
perror_plus("sigaction");
1237
1852
return EX_OSERR;
1238
1853
}
1239
1854
if(old_sigterm_action.sa_handler != SIG_IGN){
1240
1855
ret = sigaction(SIGINT, &sigterm_action, NULL);
1241
1856
if(ret == -1){
1242
perror("sigaction");
1857
perror_plus("sigaction");
1243
1858
exitcode = EX_OSERR;
1244
1859
goto end;
1245
1860
}
1246
1861
}
1247
1862
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1248
1863
if(ret == -1){
1249
perror("sigaction");
1864
perror_plus("sigaction");
1250
1865
return EX_OSERR;
1251
1866
}
1252
1867
if(old_sigterm_action.sa_handler != SIG_IGN){
1253
1868
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1254
1869
if(ret == -1){
1255
perror("sigaction");
1870
perror_plus("sigaction");
1256
1871
exitcode = EX_OSERR;
1257
1872
goto end;
1258
1873
}
1259
1874
}
1260
1875
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1261
1876
if(ret == -1){
1262
perror("sigaction");
1877
perror_plus("sigaction");
1263
1878
return EX_OSERR;
1264
1879
}
1265
1880
if(old_sigterm_action.sa_handler != SIG_IGN){
1266
1881
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1267
1882
if(ret == -1){
1268
perror("sigaction");
1883
perror_plus("sigaction");
1269
1884
exitcode = EX_OSERR;
1270
1885
goto end;
1271
1886
}
1272
1887
}
1273
1888
1274
1889
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
1890
if(strcmp(interface, "none") != 0){
1276
1891
if_index = (AvahiIfIndex) if_nametoindex(interface);
1277
1892
if(if_index == 0){
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1893
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1279
1894
exitcode = EX_UNAVAILABLE;
1280
1895
goto end;
1281
1896
}
1288
1903
errno = 0;
1289
1904
ret = seteuid(0);
1290
1905
if(ret == -1){
1291
perror("seteuid");
1906
perror_plus("seteuid");
1292
1907
}
1293
1908
1294
1909
#ifdef __linux__
1298
1913
bool restore_loglevel = true;
1299
1914
if(ret == -1){
1300
1915
restore_loglevel = false;
1301
perror("klogctl");
1916
perror_plus("klogctl");
1302
1917
}
1303
1918
#endif /* __linux__ */
1304
1919
1305
1920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1306
1921
if(sd < 0){
1307
perror("socket");
1922
perror_plus("socket");
1308
1923
exitcode = EX_OSERR;
1309
1924
#ifdef __linux__
1310
1925
if(restore_loglevel){
1311
1926
ret = klogctl(7, NULL, 0);
1312
1927
if(ret == -1){
1313
perror("klogctl");
1928
perror_plus("klogctl");
1314
1929
}
1315
1930
}
1316
1931
#endif /* __linux__ */
1318
1933
errno = 0;
1319
1934
ret = seteuid(uid);
1320
1935
if(ret == -1){
1321
perror("seteuid");
1936
perror_plus("seteuid");
1322
1937
}
1323
1938
goto end;
1324
1939
}
1325
1940
strcpy(network.ifr_name, interface);
1326
1941
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1327
1942
if(ret == -1){
1328
perror("ioctl SIOCGIFFLAGS");
1943
perror_plus("ioctl SIOCGIFFLAGS");
1329
1944
#ifdef __linux__
1330
1945
if(restore_loglevel){
1331
1946
ret = klogctl(7, NULL, 0);
1332
1947
if(ret == -1){
1333
perror("klogctl");
1948
perror_plus("klogctl");
1334
1949
}
1335
1950
}
1336
1951
#endif /* __linux__ */
1339
1954
errno = 0;
1340
1955
ret = seteuid(uid);
1341
1956
if(ret == -1){
1342
perror("seteuid");
1957
perror_plus("seteuid");
1343
1958
}
1344
1959
goto end;
1345
1960
}
1349
1964
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1350
1965
if(ret == -1){
1351
1966
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1967
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1353
1968
exitcode = EX_OSERR;
1354
1969
#ifdef __linux__
1355
1970
if(restore_loglevel){
1356
1971
ret = klogctl(7, NULL, 0);
1357
1972
if(ret == -1){
1358
perror("klogctl");
1973
perror_plus("klogctl");
1359
1974
}
1360
1975
}
1361
1976
#endif /* __linux__ */
1363
1978
errno = 0;
1364
1979
ret = seteuid(uid);
1365
1980
if(ret == -1){
1366
perror("seteuid");
1981
perror_plus("seteuid");
1367
1982
}
1368
1983
goto end;
1369
1984
}
1370
1985
}
1371
/* sleep checking until interface is running */
1986
/* Sleep checking until interface is running.
1987
Check every 0.25s, up to total time of delay */
1372
1988
for(int i=0; i < delay * 4; i++){
1373
1989
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1374
1990
if(ret == -1){
1375
perror("ioctl SIOCGIFFLAGS");
1991
perror_plus("ioctl SIOCGIFFLAGS");
1376
1992
} else if(network.ifr_flags & IFF_RUNNING){
1377
1993
break;
1378
1994
}
1379
1995
struct timespec sleeptime = { .tv_nsec = 250000000 };
1380
1996
ret = nanosleep(&sleeptime, NULL);
1381
1997
if(ret == -1 and errno != EINTR){
1382
perror("nanosleep");
1998
perror_plus("nanosleep");
1383
1999
}
1384
2000
}
1385
2001
if(not take_down_interface){
1386
2002
/* We won't need the socket anymore */
1387
2003
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1388
2004
if(ret == -1){
1389
perror("close");
2005
perror_plus("close");
1390
2006
}
1391
2007
}
1392
2008
#ifdef __linux__
1394
2010
/* Restores kernel loglevel to default */
1395
2011
ret = klogctl(7, NULL, 0);
1396
2012
if(ret == -1){
1397
perror("klogctl");
2013
perror_plus("klogctl");
1398
2014
}
1399
2015
}
1400
2016
#endif /* __linux__ */
1401
2017
/* Lower privileges */
1402
2018
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
}
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
1415
2023
}
1416
2024
}
1417
2025
1421
2029
1422
2030
ret = init_gnutls_global(pubkey, seckey);
1423
2031
if(ret == -1){
1424
fprintf(stderr, "init_gnutls_global failed\n");
2032
fprintf_plus(stderr, "init_gnutls_global failed\n");
1425
2033
exitcode = EX_UNAVAILABLE;
1426
2034
goto end;
1427
2035
} else {
1432
2040
goto end;
1433
2041
}
1434
2042
2043
if(mkdtemp(tempdir) == NULL){
2044
perror_plus("mkdtemp");
2045
goto end;
2046
}
1435
2047
tempdir_created = true;
1436
if(mkdtemp(tempdir) == NULL){
1437
tempdir_created = false;
1438
perror("mkdtemp");
1439
goto end;
1440
}
1441
2048
1442
2049
if(quit_now){
1443
2050
goto end;
1444
2051
}
1445
2052
1446
2053
if(not init_gpgme(pubkey, seckey, tempdir)){
1447
fprintf(stderr, "init_gpgme failed\n");
2054
fprintf_plus(stderr, "init_gpgme failed\n");
1448
2055
exitcode = EX_UNAVAILABLE;
1449
2056
goto end;
1450
2057
} else {
1460
2067
/* (Mainly meant for debugging) */
1461
2068
char *address = strrchr(connect_to, ':');
1462
2069
if(address == NULL){
1463
fprintf(stderr, "No colon in address\n");
2070
fprintf_plus(stderr, "No colon in address\n");
1464
2071
exitcode = EX_USAGE;
1465
2072
goto end;
1466
2073
}
1474
2081
tmpmax = strtoimax(address+1, &tmp, 10);
1475
2082
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1476
2083
or tmpmax != (uint16_t)tmpmax){
1477
fprintf(stderr, "Bad port number\n");
2084
fprintf_plus(stderr, "Bad port number\n");
1478
2085
exitcode = EX_USAGE;
1479
2086
goto end;
1480
2087
}
1485
2092
1486
2093
port = (uint16_t)tmpmax;
1487
2094
*address = '\0';
1488
address = connect_to;
1489
2095
/* Colon in address indicates IPv6 */
1490
2096
int af;
1491
if(strchr(address, ':') != NULL){
2097
if(strchr(connect_to, ':') != NULL){
1492
2098
af = AF_INET6;
2099
/* Accept [] around IPv6 address - see RFC 5952 */
2100
if(connect_to[0] == '[' and address[-1] == ']')
2101
{
2102
connect_to++;
2103
address[-1] = '\0';
2104
}
1493
2105
} else {
1494
2106
af = AF_INET;
1495
2107
}
2108
address = connect_to;
1496
2109
1497
2110
if(quit_now){
1498
2111
goto end;
1499
2112
}
1500
2113
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 {
2114
while(not quit_now){
2115
ret = start_mandos_communication(address, port, if_index, af);
2116
if(quit_now or ret == 0){
2117
break;
2118
}
2119
if(debug){
2120
fprintf_plus(stderr, "Retrying in %d seconds\n",
2121
(int)retry_interval);
2122
}
2123
sleep((int)retry_interval);
2124
}
2125
2126
if (not quit_now){
1523
2127
exitcode = EXIT_SUCCESS;
1524
2128
}
2129
1525
2130
goto end;
1526
2131
}
1527
2132
1549
2154
1550
2155
/* Check if creating the Avahi server object succeeded */
1551
2156
if(mc.server == NULL){
1552
fprintf(stderr, "Failed to create Avahi server: %s\n",
1553
avahi_strerror(error));
2157
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2158
avahi_strerror(error));
1554
2159
exitcode = EX_UNAVAILABLE;
1555
2160
goto end;
1556
2161
}
1564
2169
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1565
2170
NULL, 0, browse_callback, NULL);
1566
2171
if(sb == NULL){
1567
fprintf(stderr, "Failed to create service browser: %s\n",
1568
avahi_strerror(avahi_server_errno(mc.server)));
2172
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
1569
2174
exitcode = EX_UNAVAILABLE;
1570
2175
goto end;
1571
2176
}
1577
2182
/* Run the main loop */
1578
2183
1579
2184
if(debug){
1580
fprintf(stderr, "Starting Avahi loop search\n");
1581
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
2185
fprintf_plus(stderr, "Starting Avahi loop search\n");
2186
}
2187
2188
ret = avahi_loop_with_timeout(mc.simple_poll,
2189
(int)(retry_interval * 1000));
2190
if(debug){
2191
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2192
(ret == 0) ? "successfully" : "with error");
2193
}
1584
2194
1585
2195
end:
1586
2196
1587
2197
if(debug){
1588
fprintf(stderr, "%s exiting\n", argv[0]);
2198
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1589
2199
}
1590
2200
1591
2201
/* Cleanup things */
1608
2218
gpgme_release(mc.ctx);
1609
2219
}
1610
2220
1611
/* Take down the network interface */
1612
if(take_down_interface){
1613
/* Re-raise priviliges */
2221
/* Cleans up the circular linked list of Mandos servers the client
2222
has seen */
2223
if(mc.current_server != NULL){
2224
mc.current_server->prev->next = NULL;
2225
while(mc.current_server != NULL){
2226
server *next = mc.current_server->next;
2227
free(mc.current_server);
2228
mc.current_server = next;
2229
}
2230
}
2231
2232
/* Run network hooks */
2233
run_network_hooks("stop", interface, delay);
2234
2235
/* Re-raise priviliges */
2236
{
1614
2237
errno = 0;
1615
2238
ret = seteuid(0);
1616
2239
if(ret == -1){
1617
perror("seteuid");
2240
perror_plus("seteuid");
1618
2241
}
1619
if(geteuid() == 0){
2242
2243
/* Take down the network interface */
2244
if(take_down_interface and geteuid() == 0){
1620
2245
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1621
2246
if(ret == -1){
1622
perror("ioctl SIOCGIFFLAGS");
1623
} else if(network.ifr_flags & IFF_UP) {
2247
perror_plus("ioctl SIOCGIFFLAGS");
2248
} else if(network.ifr_flags & IFF_UP){
1624
2249
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1625
2250
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1626
2251
if(ret == -1){
1627
perror("ioctl SIOCSIFFLAGS");
2252
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1628
2253
}
1629
2254
}
1630
2255
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1631
2256
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");
2257
perror_plus("close");
1639
2258
}
1640
2259
}
1641
2260
}
2261
/* Lower privileges permanently */
2262
errno = 0;
2263
ret = setuid(uid);
2264
if(ret == -1){
2265
perror_plus("setuid");
2266
}
1642
2267
1643
/* Removes the temp directory used by GPGME */
2268
/* Removes the GPGME temp directory and all files inside */
1644
2269
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
}
2270
struct dirent **direntries = NULL;
2271
struct dirent *direntry = NULL;
2272
int numentries = scandir(tempdir, &direntries, notdotentries,
2273
alphasort);
2274
if (numentries > 0){
2275
for(int i = 0; i < numentries; i++){
2276
direntry = direntries[i];
1665
2277
char *fullname = NULL;
1666
2278
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
2279
direntry->d_name);
1668
2280
if(ret < 0){
1669
perror("asprintf");
2281
perror_plus("asprintf");
1670
2282
continue;
1671
2283
}
1672
2284
ret = remove(fullname);
1673
2285
if(ret == -1){
1674
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1675
strerror(errno));
2286
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2287
strerror(errno));
1676
2288
}
1677
2289
free(fullname);
1678
2290
}
1679
closedir(d);
2291
}
2292
2293
/* need to clean even if 0 because man page doesn't specify */
2294
free(direntries);
2295
if (numentries == -1){
2296
perror_plus("scandir");
1680
2297
}
1681
2298
ret = rmdir(tempdir);
1682
2299
if(ret == -1 and errno != ENOENT){
1683
perror("rmdir");
2300
perror_plus("rmdir");
1684
2301
}
1685
2302
}
1686
2303
1691
2308
&old_sigterm_action,
1692
2309
NULL));
1693
2310
if(ret == -1){
1694
perror("sigaction");
2311
perror_plus("sigaction");
1695
2312
}
1696
2313
do {
1697
2314
ret = raise(signal_received);
1698
2315
} while(ret != 0 and errno == EINTR);
1699
2316
if(ret != 0){
1700
perror("raise");
2317
perror_plus("raise");
1701
2318
abort();
1702
2319
}
1703
2320
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0