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237.7.124
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2012-05-06 16:54:24 UTC
- mto: (299.1.1 release) (300.1.1 release) (237.7.139 trunk) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 300.
- Revision ID: teddy@recompile.se-20120506165424-6bqcnlr33ih657tj
* mandos (DBusObjectWithProperties.Introspect): Use
itertools.chain.from_iterable(foo) instead of itertools.chain(*foo).
itertools.chain.from_iterable(foo) instead of itertools.chain(*foo).
- 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 © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
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
int e = errno;
174
fprintf(stderr, "Mandos plugin %s: ",
175
program_invocation_short_name);
176
errno = e;
177
perror(print_text);
178
}
179
180
__attribute__((format (gnu_printf, 2, 3)))
181
int fprintf_plus(FILE *stream, const char *format, ...){
182
va_list ap;
183
va_start (ap, format);
184
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
187
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
}
189
150
190
/*
151
191
* Make additional room in "buffer" for at least BUFFER_SIZE more
152
192
* bytes. "buffer_capacity" is how much is currently allocated,
153
193
* "buffer_length" is how much is already used.
154
194
*/
155
195
size_t incbuffer(char **buffer, size_t buffer_length,
156
size_t buffer_capacity){
196
size_t buffer_capacity){
157
197
if(buffer_length + BUFFER_SIZE > buffer_capacity){
158
198
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
159
199
if(buffer == NULL){
164
204
return buffer_capacity;
165
205
}
166
206
207
/* Add server to set of servers to retry periodically */
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
210
int ret;
211
server *new_server = malloc(sizeof(server));
212
if(new_server == NULL){
213
perror_plus("malloc");
214
return false;
215
}
216
*new_server = (server){ .ip = strdup(ip),
217
.port = port,
218
.if_index = if_index,
219
.af = af };
220
if(new_server->ip == NULL){
221
perror_plus("strdup");
222
return false;
223
}
224
/* Special case of first server */
225
if (mc.current_server == NULL){
226
new_server->next = new_server;
227
new_server->prev = new_server;
228
mc.current_server = new_server;
229
/* Place the new server last in the list */
230
} else {
231
new_server->next = mc.current_server;
232
new_server->prev = mc.current_server->prev;
233
new_server->prev->next = new_server;
234
mc.current_server->prev = new_server;
235
}
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
237
if(ret == -1){
238
perror_plus("clock_gettime");
239
return false;
240
}
241
return true;
242
}
243
167
244
/*
168
245
* Initialize GPGME.
169
246
*/
170
static bool init_gpgme(const char *seckey,
171
const char *pubkey, const char *tempdir){
247
static bool init_gpgme(const char *seckey, const char *pubkey,
248
const char *tempdir){
172
249
gpgme_error_t rc;
173
250
gpgme_engine_info_t engine_info;
174
251
183
260
184
261
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
185
262
if(fd == -1){
186
perror("open");
263
perror_plus("open");
187
264
return false;
188
265
}
189
266
190
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
191
268
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));
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
194
271
return false;
195
272
}
196
273
197
274
rc = gpgme_op_import(mc.ctx, pgp_data);
198
275
if(rc != GPG_ERR_NO_ERROR){
199
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
200
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
201
278
return false;
202
279
}
203
280
204
281
ret = (int)TEMP_FAILURE_RETRY(close(fd));
205
282
if(ret == -1){
206
perror("close");
283
perror_plus("close");
207
284
}
208
285
gpgme_data_release(pgp_data);
209
286
return true;
210
287
}
211
288
212
289
if(debug){
213
fprintf(stderr, "Initializing GPGME\n");
290
fprintf_plus(stderr, "Initializing GPGME\n");
214
291
}
215
292
216
293
/* Init GPGME */
217
294
gpgme_check_version(NULL);
218
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
219
296
if(rc != GPG_ERR_NO_ERROR){
220
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
221
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
222
299
return false;
223
300
}
224
301
225
/* Set GPGME home directory for the OpenPGP engine only */
302
/* Set GPGME home directory for the OpenPGP engine only */
226
303
rc = gpgme_get_engine_info(&engine_info);
227
304
if(rc != GPG_ERR_NO_ERROR){
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
229
gpgme_strsource(rc), gpgme_strerror(rc));
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
230
307
return false;
231
308
}
232
309
while(engine_info != NULL){
238
315
engine_info = engine_info->next;
239
316
}
240
317
if(engine_info == NULL){
241
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
242
320
return false;
243
321
}
244
322
245
323
/* Create new GPGME "context" */
246
324
rc = gpgme_new(&(mc.ctx));
247
325
if(rc != GPG_ERR_NO_ERROR){
248
fprintf(stderr, "bad gpgme_new: %s: %s\n",
249
gpgme_strsource(rc), gpgme_strerror(rc));
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
250
329
return false;
251
330
}
252
331
271
350
ssize_t plaintext_length = 0;
272
351
273
352
if(debug){
274
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
275
354
}
276
355
277
356
/* Create new GPGME data buffer from memory cryptotext */
278
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
279
358
0);
280
359
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));
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
283
362
return -1;
284
363
}
285
364
286
365
/* Create new empty GPGME data buffer for the plaintext */
287
366
rc = gpgme_data_new(&dh_plain);
288
367
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
291
371
gpgme_data_release(dh_crypto);
292
372
return -1;
293
373
}
296
376
data buffer */
297
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
298
378
if(rc != GPG_ERR_NO_ERROR){
299
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
301
381
plaintext_length = -1;
302
382
if(debug){
303
383
gpgme_decrypt_result_t result;
304
384
result = gpgme_op_decrypt_result(mc.ctx);
305
385
if(result == NULL){
306
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
307
387
} 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);
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
389
result->unsupported_algorithm);
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
391
result->wrong_key_usage);
312
392
if(result->file_name != NULL){
313
fprintf(stderr, "File name: %s\n", result->file_name);
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
314
394
}
315
395
gpgme_recipient_t recipient;
316
396
recipient = result->recipients;
317
397
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");
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
402
fprintf_plus(stderr, "Secret key available: %s\n",
403
recipient->status == GPG_ERR_NO_SECKEY
404
? "No" : "Yes");
324
405
recipient = recipient->next;
325
406
}
326
407
}
329
410
}
330
411
331
412
if(debug){
332
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
333
414
}
334
415
335
416
/* Seek back to the beginning of the GPGME plaintext data buffer */
336
417
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
337
perror("gpgme_data_seek");
418
perror_plus("gpgme_data_seek");
338
419
plaintext_length = -1;
339
420
goto decrypt_end;
340
421
}
342
423
*plaintext = NULL;
343
424
while(true){
344
425
plaintext_capacity = incbuffer(plaintext,
345
(size_t)plaintext_length,
346
plaintext_capacity);
426
(size_t)plaintext_length,
427
plaintext_capacity);
347
428
if(plaintext_capacity == 0){
348
perror("incbuffer");
349
plaintext_length = -1;
350
goto decrypt_end;
429
perror_plus("incbuffer");
430
plaintext_length = -1;
431
goto decrypt_end;
351
432
}
352
433
353
434
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
358
439
break;
359
440
}
360
441
if(ret < 0){
361
perror("gpgme_data_read");
442
perror_plus("gpgme_data_read");
362
443
plaintext_length = -1;
363
444
goto decrypt_end;
364
445
}
366
447
}
367
448
368
449
if(debug){
369
fprintf(stderr, "Decrypted password is: ");
450
fprintf_plus(stderr, "Decrypted password is: ");
370
451
for(ssize_t i = 0; i < plaintext_length; i++){
371
452
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
372
453
}
394
475
/* GnuTLS log function callback */
395
476
static void debuggnutls(__attribute__((unused)) int level,
396
477
const char* string){
397
fprintf(stderr, "GnuTLS: %s", string);
478
fprintf_plus(stderr, "GnuTLS: %s", string);
398
479
}
399
480
400
481
static int init_gnutls_global(const char *pubkeyfilename,
402
483
int ret;
403
484
404
485
if(debug){
405
fprintf(stderr, "Initializing GnuTLS\n");
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
406
487
}
407
488
408
489
ret = gnutls_global_init();
409
490
if(ret != GNUTLS_E_SUCCESS){
410
fprintf(stderr, "GnuTLS global_init: %s\n",
411
safer_gnutls_strerror(ret));
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
412
493
return -1;
413
494
}
414
495
421
502
}
422
503
423
504
/* OpenPGP credentials */
424
gnutls_certificate_allocate_credentials(&mc.cred);
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
425
506
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));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
431
509
gnutls_global_deinit();
432
510
return -1;
433
511
}
434
512
435
513
if(debug){
436
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
437
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
438
seckeyfilename);
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
439
518
}
440
519
441
520
ret = gnutls_certificate_set_openpgp_key_file
442
521
(mc.cred, pubkeyfilename, seckeyfilename,
443
522
GNUTLS_OPENPGP_FMT_BASE64);
444
523
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));
524
fprintf_plus(stderr,
525
"Error[%d] while reading the OpenPGP key pair ('%s',"
526
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
527
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
528
safer_gnutls_strerror(ret));
450
529
goto globalfail;
451
530
}
452
531
453
532
/* GnuTLS server initialization */
454
533
ret = gnutls_dh_params_init(&mc.dh_params);
455
534
if(ret != GNUTLS_E_SUCCESS){
456
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
457
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
458
538
goto globalfail;
459
539
}
460
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
461
541
if(ret != GNUTLS_E_SUCCESS){
462
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
463
safer_gnutls_strerror(ret));
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
464
544
goto globalfail;
465
545
}
466
546
486
566
}
487
567
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
488
568
if(ret != GNUTLS_E_SUCCESS){
489
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
490
safer_gnutls_strerror(ret));
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
491
572
}
492
573
493
574
{
500
581
}
501
582
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
502
583
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));
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
506
587
gnutls_deinit(*session);
507
588
return -1;
508
589
}
517
598
}
518
599
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
519
600
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
521
safer_gnutls_strerror(ret));
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
522
603
gnutls_deinit(*session);
523
604
return -1;
524
605
}
569
650
pf = PF_INET;
570
651
break;
571
652
default:
572
fprintf(stderr, "Bad address family: %d\n", af);
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
573
654
errno = EINVAL;
574
655
return -1;
575
656
}
580
661
}
581
662
582
663
if(debug){
583
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
584
"\n", ip, port);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
585
666
}
586
667
587
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
588
669
if(tcp_sd < 0){
589
670
int e = errno;
590
perror("socket");
671
perror_plus("socket");
591
672
errno = e;
592
673
goto mandos_end;
593
674
}
607
688
}
608
689
if(ret < 0 ){
609
690
int e = errno;
610
perror("inet_pton");
691
perror_plus("inet_pton");
611
692
errno = e;
612
693
goto mandos_end;
613
694
}
614
695
if(ret == 0){
615
696
int e = errno;
616
fprintf(stderr, "Bad address: %s\n", ip);
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
617
698
errno = e;
618
699
goto mandos_end;
619
700
}
624
705
625
706
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
626
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
627
-Wunreachable-code*/
708
-Wunreachable-code*/
628
709
if(if_index == AVAHI_IF_UNSPEC){
629
fprintf(stderr, "An IPv6 link-local address is incomplete"
630
" without a network interface\n");
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
631
712
errno = EINVAL;
632
713
goto mandos_end;
633
714
}
649
730
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
650
731
char interface[IF_NAMESIZE];
651
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
652
perror("if_indextoname");
733
perror_plus("if_indextoname");
653
734
} else {
654
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
655
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
656
737
}
657
738
} else {
658
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
659
port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
660
741
}
661
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
662
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
669
750
sizeof(addrstr));
670
751
}
671
752
if(pcret == NULL){
672
perror("inet_ntop");
753
perror_plus("inet_ntop");
673
754
} else {
674
755
if(strcmp(addrstr, ip) != 0){
675
fprintf(stderr, "Canonical address form: %s\n", addrstr);
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
676
757
}
677
758
}
678
759
}
688
769
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
689
770
}
690
771
if(ret < 0){
691
int e = errno;
692
perror("connect");
693
errno = e;
772
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
int e = errno;
774
perror_plus("connect");
775
errno = e;
776
}
694
777
goto mandos_end;
695
778
}
696
779
704
787
while(true){
705
788
size_t out_size = strlen(out);
706
789
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
707
out_size - written));
790
out_size - written));
708
791
if(ret == -1){
709
792
int e = errno;
710
perror("write");
793
perror_plus("write");
711
794
errno = e;
712
795
goto mandos_end;
713
796
}
730
813
}
731
814
732
815
if(debug){
733
fprintf(stderr, "Establishing TLS session with %s\n", ip);
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
734
817
}
735
818
736
819
if(quit_now){
738
821
goto mandos_end;
739
822
}
740
823
824
/* Spurious warning from -Wint-to-pointer-cast */
741
825
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
742
826
743
827
if(quit_now){
755
839
756
840
if(ret != GNUTLS_E_SUCCESS){
757
841
if(debug){
758
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
842
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
759
843
gnutls_perror(ret);
760
844
}
761
845
errno = EPROTO;
765
849
/* Read OpenPGP packet that contains the wanted password */
766
850
767
851
if(debug){
768
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
769
ip);
852
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
853
" %s\n", ip);
770
854
}
771
855
772
856
while(true){
777
861
}
778
862
779
863
buffer_capacity = incbuffer(&buffer, buffer_length,
780
buffer_capacity);
864
buffer_capacity);
781
865
if(buffer_capacity == 0){
782
866
int e = errno;
783
perror("incbuffer");
867
perror_plus("incbuffer");
784
868
errno = e;
785
869
goto mandos_end;
786
870
}
810
894
}
811
895
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
812
896
if(ret < 0){
813
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
897
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
898
"***\n");
814
899
gnutls_perror(ret);
815
900
errno = EPROTO;
816
901
goto mandos_end;
817
902
}
818
903
break;
819
904
default:
820
fprintf(stderr, "Unknown error while reading data from"
821
" encrypted session with Mandos server\n");
905
fprintf_plus(stderr, "Unknown error while reading data from"
906
" encrypted session with Mandos server\n");
822
907
gnutls_bye(session, GNUTLS_SHUT_RDWR);
823
908
errno = EIO;
824
909
goto mandos_end;
829
914
}
830
915
831
916
if(debug){
832
fprintf(stderr, "Closing TLS session\n");
917
fprintf_plus(stderr, "Closing TLS session\n");
833
918
}
834
919
835
920
if(quit_now){
847
932
848
933
if(buffer_length > 0){
849
934
ssize_t decrypted_buffer_size;
850
decrypted_buffer_size = pgp_packet_decrypt(buffer,
851
buffer_length,
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
852
936
&decrypted_buffer);
853
937
if(decrypted_buffer_size >= 0){
854
938
865
949
if(ret == 0 and ferror(stdout)){
866
950
int e = errno;
867
951
if(debug){
868
fprintf(stderr, "Error writing encrypted data: %s\n",
869
strerror(errno));
952
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
953
strerror(errno));
870
954
}
871
955
errno = e;
872
956
goto mandos_end;
891
975
if(e == 0){
892
976
e = errno;
893
977
}
894
perror("close");
978
perror_plus("close");
895
979
}
896
980
gnutls_deinit(session);
981
errno = e;
897
982
if(quit_now){
898
e = EINTR;
983
errno = EINTR;
899
984
retval = -1;
900
985
}
901
errno = e;
902
986
}
903
987
return retval;
904
988
}
929
1013
switch(event){
930
1014
default:
931
1015
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)));
1016
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1017
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1018
domain,
1019
avahi_strerror(avahi_server_errno(mc.server)));
935
1020
break;
936
1021
937
1022
case AVAHI_RESOLVER_FOUND:
939
1024
char ip[AVAHI_ADDRESS_STR_MAX];
940
1025
avahi_address_snprint(ip, sizeof(ip), address);
941
1026
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);
1027
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1028
PRIdMAX ") on port %" PRIu16 "\n", name,
1029
host_name, ip, (intmax_t)interface, port);
945
1030
}
946
1031
int ret = start_mandos_communication(ip, port, interface,
947
1032
avahi_proto_to_af(proto));
948
1033
if(ret == 0){
949
1034
avahi_simple_poll_quit(mc.simple_poll);
1035
} else {
1036
if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
1038
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1039
" list\n", name);
1040
}
950
1041
}
951
1042
}
952
1043
}
976
1067
default:
977
1068
case AVAHI_BROWSER_FAILURE:
978
1069
979
fprintf(stderr, "(Avahi browser) %s\n",
980
avahi_strerror(avahi_server_errno(mc.server)));
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1071
avahi_strerror(avahi_server_errno(mc.server)));
981
1072
avahi_simple_poll_quit(mc.simple_poll);
982
1073
return;
983
1074
990
1081
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
991
1082
name, type, domain, protocol, 0,
992
1083
resolve_callback, NULL) == NULL)
993
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
994
name, avahi_strerror(avahi_server_errno(mc.server)));
1084
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1085
" %s\n", name,
1086
avahi_strerror(avahi_server_errno(mc.server)));
995
1087
break;
996
1088
997
1089
case AVAHI_BROWSER_REMOVE:
1000
1092
case AVAHI_BROWSER_ALL_FOR_NOW:
1001
1093
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1002
1094
if(debug){
1003
fprintf(stderr, "No Mandos server found, still searching...\n");
1095
fprintf_plus(stderr, "No Mandos server found, still"
1096
" searching...\n");
1004
1097
}
1005
1098
break;
1006
1099
}
1007
1100
}
1008
1101
1009
/* stop main loop after sigterm has been called */
1102
/* Signal handler that stops main loop after SIGTERM */
1010
1103
static void handle_sigterm(int sig){
1011
1104
if(quit_now){
1012
1105
return;
1014
1107
quit_now = 1;
1015
1108
signal_received = sig;
1016
1109
int old_errno = errno;
1110
/* set main loop to exit */
1017
1111
if(mc.simple_poll != NULL){
1018
1112
avahi_simple_poll_quit(mc.simple_poll);
1019
1113
}
1020
1114
errno = old_errno;
1021
1115
}
1022
1116
1117
bool get_flags(const char *ifname, struct ifreq *ifr){
1118
int ret;
1119
1120
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1121
if(s < 0){
1122
perror_plus("socket");
1123
return false;
1124
}
1125
strcpy(ifr->ifr_name, ifname);
1126
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1127
if(ret == -1){
1128
if(debug){
1129
perror_plus("ioctl SIOCGIFFLAGS");
1130
}
1131
return false;
1132
}
1133
return true;
1134
}
1135
1136
bool good_flags(const char *ifname, const struct ifreq *ifr){
1137
1138
/* Reject the loopback device */
1139
if(ifr->ifr_flags & IFF_LOOPBACK){
1140
if(debug){
1141
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1142
ifname);
1143
}
1144
return false;
1145
}
1146
/* Accept point-to-point devices only if connect_to is specified */
1147
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1148
if(debug){
1149
fprintf_plus(stderr, "Accepting point-to-point interface"
1150
" \"%s\"\n", ifname);
1151
}
1152
return true;
1153
}
1154
/* Otherwise, reject non-broadcast-capable devices */
1155
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1156
if(debug){
1157
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1158
" \"%s\"\n", ifname);
1159
}
1160
return false;
1161
}
1162
/* Reject non-ARP interfaces (including dummy interfaces) */
1163
if(ifr->ifr_flags & IFF_NOARP){
1164
if(debug){
1165
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1166
ifname);
1167
}
1168
return false;
1169
}
1170
1171
/* Accept this device */
1172
if(debug){
1173
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1174
}
1175
return true;
1176
}
1177
1178
/*
1179
* This function determines if a directory entry in /sys/class/net
1180
* corresponds to an acceptable network device.
1181
* (This function is passed to scandir(3) as a filter function.)
1182
*/
1183
int good_interface(const struct dirent *if_entry){
1184
if(if_entry->d_name[0] == '.'){
1185
return 0;
1186
}
1187
1188
struct ifreq ifr;
1189
if(not get_flags(if_entry->d_name, &ifr)){
1190
if(debug){
1191
fprintf_plus(stderr, "Failed to get flags for interface "
1192
"\"%s\"\n", if_entry->d_name);
1193
}
1194
return 0;
1195
}
1196
1197
if(not good_flags(if_entry->d_name, &ifr)){
1198
return 0;
1199
}
1200
return 1;
1201
}
1202
1203
/*
1204
* This function determines if a directory entry in /sys/class/net
1205
* corresponds to an acceptable network device which is up.
1206
* (This function is passed to scandir(3) as a filter function.)
1207
*/
1208
int up_interface(const struct dirent *if_entry){
1209
if(if_entry->d_name[0] == '.'){
1210
return 0;
1211
}
1212
1213
struct ifreq ifr;
1214
if(not get_flags(if_entry->d_name, &ifr)){
1215
if(debug){
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1218
}
1219
return 0;
1220
}
1221
1222
/* Reject down interfaces */
1223
if(not (ifr.ifr_flags & IFF_UP)){
1224
if(debug){
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1227
}
1228
return 0;
1229
}
1230
1231
/* Reject non-running interfaces */
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1233
if(debug){
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1236
}
1237
return 0;
1238
}
1239
1240
if(not good_flags(if_entry->d_name, &ifr)){
1241
return 0;
1242
}
1243
return 1;
1244
}
1245
1246
int notdotentries(const struct dirent *direntry){
1247
/* Skip "." and ".." */
1248
if(direntry->d_name[0] == '.'
1249
and (direntry->d_name[1] == '\0'
1250
or (direntry->d_name[1] == '.'
1251
and direntry->d_name[2] == '\0'))){
1252
return 0;
1253
}
1254
return 1;
1255
}
1256
1257
/* Is this directory entry a runnable program? */
1258
int runnable_hook(const struct dirent *direntry){
1259
int ret;
1260
size_t sret;
1261
struct stat st;
1262
1263
if((direntry->d_name)[0] == '\0'){
1264
/* Empty name? */
1265
return 0;
1266
}
1267
1268
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1269
"abcdefghijklmnopqrstuvwxyz"
1270
"0123456789"
1271
"_-");
1272
if((direntry->d_name)[sret] != '\0'){
1273
/* Contains non-allowed characters */
1274
if(debug){
1275
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1276
direntry->d_name);
1277
}
1278
return 0;
1279
}
1280
1281
char *fullname = NULL;
1282
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1283
if(ret < 0){
1284
perror_plus("asprintf");
1285
return 0;
1286
}
1287
1288
ret = stat(fullname, &st);
1289
if(ret == -1){
1290
if(debug){
1291
perror_plus("Could not stat hook");
1292
}
1293
return 0;
1294
}
1295
if(not (S_ISREG(st.st_mode))){
1296
/* Not a regular file */
1297
if(debug){
1298
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1299
direntry->d_name);
1300
}
1301
return 0;
1302
}
1303
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1304
/* Not executable */
1305
if(debug){
1306
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1307
direntry->d_name);
1308
}
1309
return 0;
1310
}
1311
if(debug){
1312
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1313
direntry->d_name);
1314
}
1315
return 1;
1316
}
1317
1318
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1319
int ret;
1320
struct timespec now;
1321
struct timespec waited_time;
1322
intmax_t block_time;
1323
1324
while(true){
1325
if(mc.current_server == NULL){
1326
if (debug){
1327
fprintf_plus(stderr, "Wait until first server is found."
1328
" No timeout!\n");
1329
}
1330
ret = avahi_simple_poll_iterate(s, -1);
1331
} else {
1332
if (debug){
1333
fprintf_plus(stderr, "Check current_server if we should run"
1334
" it, or wait\n");
1335
}
1336
/* the current time */
1337
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1338
if(ret == -1){
1339
perror_plus("clock_gettime");
1340
return -1;
1341
}
1342
/* Calculating in ms how long time between now and server
1343
who we visted longest time ago. Now - last seen. */
1344
waited_time.tv_sec = (now.tv_sec
1345
- mc.current_server->last_seen.tv_sec);
1346
waited_time.tv_nsec = (now.tv_nsec
1347
- mc.current_server->last_seen.tv_nsec);
1348
/* total time is 10s/10,000ms.
1349
Converting to s from ms by dividing by 1,000,
1350
and ns to ms by dividing by 1,000,000. */
1351
block_time = ((retry_interval
1352
- ((intmax_t)waited_time.tv_sec * 1000))
1353
- ((intmax_t)waited_time.tv_nsec / 1000000));
1354
1355
if (debug){
1356
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1357
block_time);
1358
}
1359
1360
if(block_time <= 0){
1361
ret = start_mandos_communication(mc.current_server->ip,
1362
mc.current_server->port,
1363
mc.current_server->if_index,
1364
mc.current_server->af);
1365
if(ret == 0){
1366
avahi_simple_poll_quit(mc.simple_poll);
1367
return 0;
1368
}
1369
ret = clock_gettime(CLOCK_MONOTONIC,
1370
&mc.current_server->last_seen);
1371
if(ret == -1){
1372
perror_plus("clock_gettime");
1373
return -1;
1374
}
1375
mc.current_server = mc.current_server->next;
1376
block_time = 0; /* Call avahi to find new Mandos
1377
servers, but don't block */
1378
}
1379
1380
ret = avahi_simple_poll_iterate(s, (int)block_time);
1381
}
1382
if(ret != 0){
1383
if (ret > 0 or errno != EINTR){
1384
return (ret != 1) ? ret : 0;
1385
}
1386
}
1387
}
1388
}
1389
1390
bool run_network_hooks(const char *mode, const char *interface,
1391
const float delay){
1392
struct dirent **direntries;
1393
struct dirent *direntry;
1394
int ret;
1395
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1396
alphasort);
1397
if(numhooks == -1){
1398
perror_plus("scandir");
1399
} else {
1400
int devnull = open("/dev/null", O_RDONLY);
1401
for(int i = 0; i < numhooks; i++){
1402
direntry = direntries[i];
1403
char *fullname = NULL;
1404
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1405
if(ret < 0){
1406
perror_plus("asprintf");
1407
continue;
1408
}
1409
if(debug){
1410
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1411
direntry->d_name);
1412
}
1413
pid_t hook_pid = fork();
1414
if(hook_pid == 0){
1415
/* Child */
1416
/* Raise privileges */
1417
errno = 0;
1418
ret = seteuid(0);
1419
if(ret == -1){
1420
perror_plus("seteuid");
1421
}
1422
/* Raise privileges even more */
1423
errno = 0;
1424
ret = setuid(0);
1425
if(ret == -1){
1426
perror_plus("setuid");
1427
}
1428
/* Set group */
1429
errno = 0;
1430
ret = setgid(0);
1431
if(ret == -1){
1432
perror_plus("setgid");
1433
}
1434
/* Reset supplementary groups */
1435
errno = 0;
1436
ret = setgroups(0, NULL);
1437
if(ret == -1){
1438
perror_plus("setgroups");
1439
}
1440
dup2(devnull, STDIN_FILENO);
1441
close(devnull);
1442
dup2(STDERR_FILENO, STDOUT_FILENO);
1443
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1444
if(ret == -1){
1445
perror_plus("setenv");
1446
_exit(EX_OSERR);
1447
}
1448
ret = setenv("DEVICE", interface, 1);
1449
if(ret == -1){
1450
perror_plus("setenv");
1451
_exit(EX_OSERR);
1452
}
1453
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1454
if(ret == -1){
1455
perror_plus("setenv");
1456
_exit(EX_OSERR);
1457
}
1458
ret = setenv("MODE", mode, 1);
1459
if(ret == -1){
1460
perror_plus("setenv");
1461
_exit(EX_OSERR);
1462
}
1463
char *delaystring;
1464
ret = asprintf(&delaystring, "%f", delay);
1465
if(ret == -1){
1466
perror_plus("asprintf");
1467
_exit(EX_OSERR);
1468
}
1469
ret = setenv("DELAY", delaystring, 1);
1470
if(ret == -1){
1471
free(delaystring);
1472
perror_plus("setenv");
1473
_exit(EX_OSERR);
1474
}
1475
free(delaystring);
1476
if(connect_to != NULL){
1477
ret = setenv("CONNECT", connect_to, 1);
1478
if(ret == -1){
1479
perror_plus("setenv");
1480
_exit(EX_OSERR);
1481
}
1482
}
1483
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1484
perror_plus("execl");
1485
_exit(EXIT_FAILURE);
1486
}
1487
} else {
1488
int status;
1489
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1490
perror_plus("waitpid");
1491
free(fullname);
1492
continue;
1493
}
1494
if(WIFEXITED(status)){
1495
if(WEXITSTATUS(status) != 0){
1496
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1497
" with status %d\n", direntry->d_name,
1498
WEXITSTATUS(status));
1499
free(fullname);
1500
continue;
1501
}
1502
} else if(WIFSIGNALED(status)){
1503
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1504
" signal %d\n", direntry->d_name,
1505
WTERMSIG(status));
1506
free(fullname);
1507
continue;
1508
} else {
1509
fprintf_plus(stderr, "Warning: network hook \"%s\""
1510
" crashed\n", direntry->d_name);
1511
free(fullname);
1512
continue;
1513
}
1514
}
1515
free(fullname);
1516
if(debug){
1517
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1518
direntry->d_name);
1519
}
1520
}
1521
close(devnull);
1522
}
1523
return true;
1524
}
1525
1023
1526
int main(int argc, char *argv[]){
1024
1527
AvahiSServiceBrowser *sb = NULL;
1025
1528
int error;
1027
1530
intmax_t tmpmax;
1028
1531
char *tmp;
1029
1532
int exitcode = EXIT_SUCCESS;
1030
const char *interface = "eth0";
1533
const char *interface = "";
1031
1534
struct ifreq network;
1032
1535
int sd = -1;
1033
1536
bool take_down_interface = false;
1034
1537
uid_t uid;
1035
1538
gid_t gid;
1036
char *connect_to = NULL;
1037
1539
char tempdir[] = "/tmp/mandosXXXXXX";
1038
1540
bool tempdir_created = false;
1039
1541
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1043
1545
bool gnutls_initialized = false;
1044
1546
bool gpgme_initialized = false;
1045
1547
float delay = 2.5f;
1548
double retry_interval = 10; /* 10s between trying a server and
1549
retrying the same server again */
1046
1550
1047
1551
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1048
1552
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1054
1558
errno = 0;
1055
1559
ret = setgid(gid);
1056
1560
if(ret == -1){
1057
perror("setgid");
1561
perror_plus("setgid");
1058
1562
}
1059
1563
1060
1564
/* Lower user privileges (temporarily) */
1061
1565
errno = 0;
1062
1566
ret = seteuid(uid);
1063
1567
if(ret == -1){
1064
perror("seteuid");
1568
perror_plus("seteuid");
1065
1569
}
1066
1570
1067
1571
if(quit_now){
1102
1606
.arg = "SECONDS",
1103
1607
.doc = "Maximum delay to wait for interface startup",
1104
1608
.group = 2 },
1609
{ .name = "retry", .key = 132,
1610
.arg = "SECONDS",
1611
.doc = "Retry interval used when denied by the Mandos server",
1612
.group = 2 },
1613
{ .name = "network-hook-dir", .key = 133,
1614
.arg = "DIR",
1615
.doc = "Directory where network hooks are located",
1616
.group = 2 },
1105
1617
/*
1106
1618
* These reproduce what we would get without ARGP_NO_HELP
1107
1619
*/
1151
1663
if(errno != 0 or tmp == arg or *tmp != '\0'){
1152
1664
argp_error(state, "Bad delay");
1153
1665
}
1666
case 132: /* --retry */
1667
errno = 0;
1668
retry_interval = strtod(arg, &tmp);
1669
if(errno != 0 or tmp == arg or *tmp != '\0'
1670
or (retry_interval * 1000) > INT_MAX
1671
or retry_interval < 0){
1672
argp_error(state, "Bad retry interval");
1673
}
1674
break;
1675
case 133: /* --network-hook-dir */
1676
hookdir = arg;
1154
1677
break;
1155
1678
/*
1156
1679
* These reproduce what we would get without ARGP_NO_HELP
1163
1686
argp_state_help(state, state->out_stream,
1164
1687
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1165
1688
case 'V': /* --version */
1166
fprintf(state->out_stream, "%s\n", argp_program_version);
1689
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1167
1690
exit(argp_err_exit_status);
1168
1691
break;
1169
1692
default:
1184
1707
case ENOMEM:
1185
1708
default:
1186
1709
errno = ret;
1187
perror("argp_parse");
1710
perror_plus("argp_parse");
1188
1711
exitcode = EX_OSERR;
1189
1712
goto end;
1190
1713
case EINVAL:
1192
1715
goto end;
1193
1716
}
1194
1717
}
1718
1719
{
1720
/* Work around Debian bug #633582:
1721
<http://bugs.debian.org/633582> */
1722
1723
/* Re-raise priviliges */
1724
errno = 0;
1725
ret = seteuid(0);
1726
if(ret == -1){
1727
perror_plus("seteuid");
1728
} else {
1729
struct stat st;
1730
1731
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1732
int seckey_fd = open(seckey, O_RDONLY);
1733
if(seckey_fd == -1){
1734
perror_plus("open");
1735
} else {
1736
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1737
if(ret == -1){
1738
perror_plus("fstat");
1739
} else {
1740
if(S_ISREG(st.st_mode)
1741
and st.st_uid == 0 and st.st_gid == 0){
1742
ret = fchown(seckey_fd, uid, gid);
1743
if(ret == -1){
1744
perror_plus("fchown");
1745
}
1746
}
1747
}
1748
TEMP_FAILURE_RETRY(close(seckey_fd));
1749
}
1750
}
1751
1752
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1753
int pubkey_fd = open(pubkey, O_RDONLY);
1754
if(pubkey_fd == -1){
1755
perror_plus("open");
1756
} else {
1757
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1758
if(ret == -1){
1759
perror_plus("fstat");
1760
} else {
1761
if(S_ISREG(st.st_mode)
1762
and st.st_uid == 0 and st.st_gid == 0){
1763
ret = fchown(pubkey_fd, uid, gid);
1764
if(ret == -1){
1765
perror_plus("fchown");
1766
}
1767
}
1768
}
1769
TEMP_FAILURE_RETRY(close(pubkey_fd));
1770
}
1771
}
1772
1773
/* Lower privileges */
1774
errno = 0;
1775
ret = seteuid(uid);
1776
if(ret == -1){
1777
perror_plus("seteuid");
1778
}
1779
}
1780
}
1781
1782
/* Run network hooks */
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
1785
}
1195
1786
1196
1787
if(not debug){
1197
1788
avahi_set_log_function(empty_log);
1198
1789
}
1199
1790
1791
if(interface[0] == '\0'){
1792
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1795
alphasort);
1796
if(ret == 0){
1797
/* No up interfaces, look for any good interfaces */
1798
free(direntries);
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1800
alphasort);
1801
}
1802
if(ret >= 1){
1803
/* Pick the first interface returned */
1804
interface = strdup(direntries[0]->d_name);
1805
if(debug){
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1807
}
1808
if(interface == NULL){
1809
perror_plus("malloc");
1810
free(direntries);
1811
exitcode = EXIT_FAILURE;
1812
goto end;
1813
}
1814
free(direntries);
1815
} else {
1816
free(direntries);
1817
fprintf_plus(stderr, "Could not find a network interface\n");
1818
exitcode = EXIT_FAILURE;
1819
goto end;
1820
}
1821
}
1822
1200
1823
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1201
1824
from the signal handler */
1202
1825
/* Initialize the pseudo-RNG for Avahi */
1203
1826
srand((unsigned int) time(NULL));
1204
1827
mc.simple_poll = avahi_simple_poll_new();
1205
1828
if(mc.simple_poll == NULL){
1206
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1829
fprintf_plus(stderr,
1830
"Avahi: Failed to create simple poll object.\n");
1207
1831
exitcode = EX_UNAVAILABLE;
1208
1832
goto end;
1209
1833
}
1211
1835
sigemptyset(&sigterm_action.sa_mask);
1212
1836
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1213
1837
if(ret == -1){
1214
perror("sigaddset");
1838
perror_plus("sigaddset");
1215
1839
exitcode = EX_OSERR;
1216
1840
goto end;
1217
1841
}
1218
1842
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1219
1843
if(ret == -1){
1220
perror("sigaddset");
1844
perror_plus("sigaddset");
1221
1845
exitcode = EX_OSERR;
1222
1846
goto end;
1223
1847
}
1224
1848
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1225
1849
if(ret == -1){
1226
perror("sigaddset");
1850
perror_plus("sigaddset");
1227
1851
exitcode = EX_OSERR;
1228
1852
goto end;
1229
1853
}
1233
1857
*/
1234
1858
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1235
1859
if(ret == -1){
1236
perror("sigaction");
1860
perror_plus("sigaction");
1237
1861
return EX_OSERR;
1238
1862
}
1239
1863
if(old_sigterm_action.sa_handler != SIG_IGN){
1240
1864
ret = sigaction(SIGINT, &sigterm_action, NULL);
1241
1865
if(ret == -1){
1242
perror("sigaction");
1866
perror_plus("sigaction");
1243
1867
exitcode = EX_OSERR;
1244
1868
goto end;
1245
1869
}
1246
1870
}
1247
1871
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1248
1872
if(ret == -1){
1249
perror("sigaction");
1873
perror_plus("sigaction");
1250
1874
return EX_OSERR;
1251
1875
}
1252
1876
if(old_sigterm_action.sa_handler != SIG_IGN){
1253
1877
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1254
1878
if(ret == -1){
1255
perror("sigaction");
1879
perror_plus("sigaction");
1256
1880
exitcode = EX_OSERR;
1257
1881
goto end;
1258
1882
}
1259
1883
}
1260
1884
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1261
1885
if(ret == -1){
1262
perror("sigaction");
1886
perror_plus("sigaction");
1263
1887
return EX_OSERR;
1264
1888
}
1265
1889
if(old_sigterm_action.sa_handler != SIG_IGN){
1266
1890
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1267
1891
if(ret == -1){
1268
perror("sigaction");
1892
perror_plus("sigaction");
1269
1893
exitcode = EX_OSERR;
1270
1894
goto end;
1271
1895
}
1272
1896
}
1273
1897
1274
1898
/* If the interface is down, bring it up */
1275
if(interface[0] != '\0'){
1899
if(strcmp(interface, "none") != 0){
1276
1900
if_index = (AvahiIfIndex) if_nametoindex(interface);
1277
1901
if(if_index == 0){
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1279
1903
exitcode = EX_UNAVAILABLE;
1280
1904
goto end;
1281
1905
}
1288
1912
errno = 0;
1289
1913
ret = seteuid(0);
1290
1914
if(ret == -1){
1291
perror("seteuid");
1915
perror_plus("seteuid");
1292
1916
}
1293
1917
1294
1918
#ifdef __linux__
1298
1922
bool restore_loglevel = true;
1299
1923
if(ret == -1){
1300
1924
restore_loglevel = false;
1301
perror("klogctl");
1925
perror_plus("klogctl");
1302
1926
}
1303
1927
#endif /* __linux__ */
1304
1928
1305
1929
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1306
1930
if(sd < 0){
1307
perror("socket");
1931
perror_plus("socket");
1308
1932
exitcode = EX_OSERR;
1309
1933
#ifdef __linux__
1310
1934
if(restore_loglevel){
1311
1935
ret = klogctl(7, NULL, 0);
1312
1936
if(ret == -1){
1313
perror("klogctl");
1937
perror_plus("klogctl");
1314
1938
}
1315
1939
}
1316
1940
#endif /* __linux__ */
1318
1942
errno = 0;
1319
1943
ret = seteuid(uid);
1320
1944
if(ret == -1){
1321
perror("seteuid");
1945
perror_plus("seteuid");
1322
1946
}
1323
1947
goto end;
1324
1948
}
1325
1949
strcpy(network.ifr_name, interface);
1326
1950
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1327
1951
if(ret == -1){
1328
perror("ioctl SIOCGIFFLAGS");
1952
perror_plus("ioctl SIOCGIFFLAGS");
1329
1953
#ifdef __linux__
1330
1954
if(restore_loglevel){
1331
1955
ret = klogctl(7, NULL, 0);
1332
1956
if(ret == -1){
1333
perror("klogctl");
1957
perror_plus("klogctl");
1334
1958
}
1335
1959
}
1336
1960
#endif /* __linux__ */
1339
1963
errno = 0;
1340
1964
ret = seteuid(uid);
1341
1965
if(ret == -1){
1342
perror("seteuid");
1966
perror_plus("seteuid");
1343
1967
}
1344
1968
goto end;
1345
1969
}
1349
1973
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1350
1974
if(ret == -1){
1351
1975
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1976
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1353
1977
exitcode = EX_OSERR;
1354
1978
#ifdef __linux__
1355
1979
if(restore_loglevel){
1356
1980
ret = klogctl(7, NULL, 0);
1357
1981
if(ret == -1){
1358
perror("klogctl");
1982
perror_plus("klogctl");
1359
1983
}
1360
1984
}
1361
1985
#endif /* __linux__ */
1363
1987
errno = 0;
1364
1988
ret = seteuid(uid);
1365
1989
if(ret == -1){
1366
perror("seteuid");
1990
perror_plus("seteuid");
1367
1991
}
1368
1992
goto end;
1369
1993
}
1370
1994
}
1371
/* sleep checking until interface is running */
1995
/* Sleep checking until interface is running.
1996
Check every 0.25s, up to total time of delay */
1372
1997
for(int i=0; i < delay * 4; i++){
1373
1998
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1374
1999
if(ret == -1){
1375
perror("ioctl SIOCGIFFLAGS");
2000
perror_plus("ioctl SIOCGIFFLAGS");
1376
2001
} else if(network.ifr_flags & IFF_RUNNING){
1377
2002
break;
1378
2003
}
1379
2004
struct timespec sleeptime = { .tv_nsec = 250000000 };
1380
2005
ret = nanosleep(&sleeptime, NULL);
1381
2006
if(ret == -1 and errno != EINTR){
1382
perror("nanosleep");
2007
perror_plus("nanosleep");
1383
2008
}
1384
2009
}
1385
2010
if(not take_down_interface){
1386
2011
/* We won't need the socket anymore */
1387
2012
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1388
2013
if(ret == -1){
1389
perror("close");
2014
perror_plus("close");
1390
2015
}
1391
2016
}
1392
2017
#ifdef __linux__
1394
2019
/* Restores kernel loglevel to default */
1395
2020
ret = klogctl(7, NULL, 0);
1396
2021
if(ret == -1){
1397
perror("klogctl");
2022
perror_plus("klogctl");
1398
2023
}
1399
2024
}
1400
2025
#endif /* __linux__ */
1401
2026
/* Lower privileges */
1402
2027
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
}
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
perror_plus("seteuid");
1415
2032
}
1416
2033
}
1417
2034
1421
2038
1422
2039
ret = init_gnutls_global(pubkey, seckey);
1423
2040
if(ret == -1){
1424
fprintf(stderr, "init_gnutls_global failed\n");
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
1425
2042
exitcode = EX_UNAVAILABLE;
1426
2043
goto end;
1427
2044
} else {
1432
2049
goto end;
1433
2050
}
1434
2051
2052
if(mkdtemp(tempdir) == NULL){
2053
perror_plus("mkdtemp");
2054
goto end;
2055
}
1435
2056
tempdir_created = true;
1436
if(mkdtemp(tempdir) == NULL){
1437
tempdir_created = false;
1438
perror("mkdtemp");
1439
goto end;
1440
}
1441
2057
1442
2058
if(quit_now){
1443
2059
goto end;
1444
2060
}
1445
2061
1446
2062
if(not init_gpgme(pubkey, seckey, tempdir)){
1447
fprintf(stderr, "init_gpgme failed\n");
2063
fprintf_plus(stderr, "init_gpgme failed\n");
1448
2064
exitcode = EX_UNAVAILABLE;
1449
2065
goto end;
1450
2066
} else {
1460
2076
/* (Mainly meant for debugging) */
1461
2077
char *address = strrchr(connect_to, ':');
1462
2078
if(address == NULL){
1463
fprintf(stderr, "No colon in address\n");
2079
fprintf_plus(stderr, "No colon in address\n");
1464
2080
exitcode = EX_USAGE;
1465
2081
goto end;
1466
2082
}
1474
2090
tmpmax = strtoimax(address+1, &tmp, 10);
1475
2091
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1476
2092
or tmpmax != (uint16_t)tmpmax){
1477
fprintf(stderr, "Bad port number\n");
2093
fprintf_plus(stderr, "Bad port number\n");
1478
2094
exitcode = EX_USAGE;
1479
2095
goto end;
1480
2096
}
1485
2101
1486
2102
port = (uint16_t)tmpmax;
1487
2103
*address = '\0';
1488
address = connect_to;
1489
2104
/* Colon in address indicates IPv6 */
1490
2105
int af;
1491
if(strchr(address, ':') != NULL){
2106
if(strchr(connect_to, ':') != NULL){
1492
2107
af = AF_INET6;
2108
/* Accept [] around IPv6 address - see RFC 5952 */
2109
if(connect_to[0] == '[' and address[-1] == ']')
2110
{
2111
connect_to++;
2112
address[-1] = '\0';
2113
}
1493
2114
} else {
1494
2115
af = AF_INET;
1495
2116
}
2117
address = connect_to;
1496
2118
1497
2119
if(quit_now){
1498
2120
goto end;
1499
2121
}
1500
2122
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 {
2123
while(not quit_now){
2124
ret = start_mandos_communication(address, port, if_index, af);
2125
if(quit_now or ret == 0){
2126
break;
2127
}
2128
if(debug){
2129
fprintf_plus(stderr, "Retrying in %d seconds\n",
2130
(int)retry_interval);
2131
}
2132
sleep((int)retry_interval);
2133
}
2134
2135
if (not quit_now){
1523
2136
exitcode = EXIT_SUCCESS;
1524
2137
}
2138
1525
2139
goto end;
1526
2140
}
1527
2141
1549
2163
1550
2164
/* Check if creating the Avahi server object succeeded */
1551
2165
if(mc.server == NULL){
1552
fprintf(stderr, "Failed to create Avahi server: %s\n",
1553
avahi_strerror(error));
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2167
avahi_strerror(error));
1554
2168
exitcode = EX_UNAVAILABLE;
1555
2169
goto end;
1556
2170
}
1564
2178
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1565
2179
NULL, 0, browse_callback, NULL);
1566
2180
if(sb == NULL){
1567
fprintf(stderr, "Failed to create service browser: %s\n",
1568
avahi_strerror(avahi_server_errno(mc.server)));
2181
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2182
avahi_strerror(avahi_server_errno(mc.server)));
1569
2183
exitcode = EX_UNAVAILABLE;
1570
2184
goto end;
1571
2185
}
1577
2191
/* Run the main loop */
1578
2192
1579
2193
if(debug){
1580
fprintf(stderr, "Starting Avahi loop search\n");
1581
}
1582
1583
avahi_simple_poll_loop(mc.simple_poll);
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2195
}
2196
2197
ret = avahi_loop_with_timeout(mc.simple_poll,
2198
(int)(retry_interval * 1000));
2199
if(debug){
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2201
(ret == 0) ? "successfully" : "with error");
2202
}
1584
2203
1585
2204
end:
1586
2205
1587
2206
if(debug){
1588
fprintf(stderr, "%s exiting\n", argv[0]);
2207
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1589
2208
}
1590
2209
1591
2210
/* Cleanup things */
1608
2227
gpgme_release(mc.ctx);
1609
2228
}
1610
2229
1611
/* Take down the network interface */
1612
if(take_down_interface){
1613
/* Re-raise priviliges */
2230
/* Cleans up the circular linked list of Mandos servers the client
2231
has seen */
2232
if(mc.current_server != NULL){
2233
mc.current_server->prev->next = NULL;
2234
while(mc.current_server != NULL){
2235
server *next = mc.current_server->next;
2236
free(mc.current_server);
2237
mc.current_server = next;
2238
}
2239
}
2240
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2243
2244
/* Re-raise priviliges */
2245
{
1614
2246
errno = 0;
1615
2247
ret = seteuid(0);
1616
2248
if(ret == -1){
1617
perror("seteuid");
2249
perror_plus("seteuid");
1618
2250
}
1619
if(geteuid() == 0){
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
1620
2254
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1621
2255
if(ret == -1){
1622
perror("ioctl SIOCGIFFLAGS");
1623
} else if(network.ifr_flags & IFF_UP) {
2256
perror_plus("ioctl SIOCGIFFLAGS");
2257
} else if(network.ifr_flags & IFF_UP){
1624
2258
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1625
2259
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1626
2260
if(ret == -1){
1627
perror("ioctl SIOCSIFFLAGS");
2261
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1628
2262
}
1629
2263
}
1630
2264
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1631
2265
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");
2266
perror_plus("close");
1639
2267
}
1640
2268
}
1641
2269
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
1642
2276
1643
/* Removes the temp directory used by GPGME */
2277
/* Removes the GPGME temp directory and all files inside */
1644
2278
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
}
2279
struct dirent **direntries = NULL;
2280
struct dirent *direntry = NULL;
2281
int numentries = scandir(tempdir, &direntries, notdotentries,
2282
alphasort);
2283
if (numentries > 0){
2284
for(int i = 0; i < numentries; i++){
2285
direntry = direntries[i];
1665
2286
char *fullname = NULL;
1666
2287
ret = asprintf(&fullname, "%s/%s", tempdir,
1667
2288
direntry->d_name);
1668
2289
if(ret < 0){
1669
perror("asprintf");
2290
perror_plus("asprintf");
1670
2291
continue;
1671
2292
}
1672
2293
ret = remove(fullname);
1673
2294
if(ret == -1){
1674
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1675
strerror(errno));
2295
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2296
strerror(errno));
1676
2297
}
1677
2298
free(fullname);
1678
2299
}
1679
closedir(d);
2300
}
2301
2302
/* need to clean even if 0 because man page doesn't specify */
2303
free(direntries);
2304
if (numentries == -1){
2305
perror_plus("scandir");
1680
2306
}
1681
2307
ret = rmdir(tempdir);
1682
2308
if(ret == -1 and errno != ENOENT){
1683
perror("rmdir");
2309
perror_plus("rmdir");
1684
2310
}
1685
2311
}
1686
2312
1691
2317
&old_sigterm_action,
1692
2318
NULL));
1693
2319
if(ret == -1){
1694
perror("sigaction");
2320
perror_plus("sigaction");
1695
2321
}
1696
2322
do {
1697
2323
ret = raise(signal_received);
1698
2324
} while(ret != 0 and errno == EINTR);
1699
2325
if(ret != 0){
1700
perror("raise");
2326
perror_plus("raise");
1701
2327
abort();
1702
2328
}
1703
2329
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0