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- Committer: Teddy Hogeborn
- Date: 2009-10-18 16:09:05 UTC
- Revision ID: teddy@fukt.bsnet.se-20091018160905-ep07o5cwedsegz9x
* plugins.d/askpass-fifo.c: Do close(STDOUT_FILENO) before exiting to
check its return code. Use exit codes
from <sysexits.h>.
* plugins.d/splashy.c: Use exit codes from <sysexits.h> in the fork to
exec the "splashy_update" command.
check its return code. Use exit codes
from <sysexits.h>.
* plugins.d/splashy.c: Use exit codes from <sysexits.h> in the fork to
exec the "splashy_update" command.
- files removed:
- 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 © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
79
79
argp_state, struct argp,
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
84
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
94
85
95
86
#ifdef __linux__
96
87
#include <sys/klog.h> /* klogctl() */
114
105
init_gnutls_session(),
115
106
GNUTLS_* */
116
107
#include <gnutls/openpgp.h>
117
/* gnutls_certificate_set_openpgp_key_file(),
118
GNUTLS_OPENPGP_FMT_BASE64 */
108
/* gnutls_certificate_set_openpgp_key_file(),
109
GNUTLS_OPENPGP_FMT_BASE64 */
119
110
120
111
/* GPGME */
121
112
#include <gpgme.h> /* All GPGME types, constants and
129
120
#define PATHDIR "/conf/conf.d/mandos"
130
121
#define SECKEY "seckey.txt"
131
122
#define PUBKEY "pubkey.txt"
132
#define HOOKDIR "/lib/mandos/network-hooks.d"
133
123
134
124
bool debug = false;
135
125
static const char mandos_protocol_version[] = "1";
136
126
const char *argp_program_version = "mandos-client " VERSION;
137
const char *argp_program_bug_address = "<mandos@recompile.se>";
138
static const char sys_class_net[] = "/sys/class/net";
139
char *connect_to = NULL;
140
const char *hookdir = HOOKDIR;
141
uid_t uid = 65534;
142
gid_t gid = 65534;
143
144
/* Doubly linked list that need to be circularly linked when used */
145
typedef struct server{
146
const char *ip;
147
in_port_t port;
148
AvahiIfIndex if_index;
149
int af;
150
struct timespec last_seen;
151
struct server *next;
152
struct server *prev;
153
} server;
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
154
128
155
129
/* Used for passing in values through the Avahi callback functions */
156
130
typedef struct {
131
AvahiSimplePoll *simple_poll;
157
132
AvahiServer *server;
158
133
gnutls_certificate_credentials_t cred;
159
134
unsigned int dh_bits;
160
135
gnutls_dh_params_t dh_params;
161
136
const char *priority;
162
137
gpgme_ctx_t ctx;
163
server *current_server;
164
char *interfaces;
165
size_t interfaces_size;
166
138
} mandos_context;
167
139
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
170
144
171
145
sig_atomic_t quit_now = 0;
172
146
int signal_received = 0;
173
147
174
/* Function to use when printing errors */
175
void perror_plus(const char *print_text){
176
int e = errno;
177
fprintf(stderr, "Mandos plugin %s: ",
178
program_invocation_short_name);
179
errno = e;
180
perror(print_text);
181
}
182
183
__attribute__((format (gnu_printf, 2, 3)))
184
int fprintf_plus(FILE *stream, const char *format, ...){
185
va_list ap;
186
va_start (ap, format);
187
188
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
}
192
193
148
/*
194
149
* Make additional room in "buffer" for at least BUFFER_SIZE more
195
150
* bytes. "buffer_capacity" is how much is currently allocated,
196
151
* "buffer_length" is how much is already used.
197
152
*/
198
153
size_t incbuffer(char **buffer, size_t buffer_length,
199
size_t buffer_capacity){
154
size_t buffer_capacity){
200
155
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
156
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
157
if(buffer == NULL){
207
162
return buffer_capacity;
208
163
}
209
164
210
/* Add server to set of servers to retry periodically */
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
int af, server **current_server){
213
int ret;
214
server *new_server = malloc(sizeof(server));
215
if(new_server == NULL){
216
perror_plus("malloc");
217
return false;
218
}
219
*new_server = (server){ .ip = strdup(ip),
220
.port = port,
221
.if_index = if_index,
222
.af = af };
223
if(new_server->ip == NULL){
224
perror_plus("strdup");
225
return false;
226
}
227
/* Special case of first server */
228
if(*current_server == NULL){
229
new_server->next = new_server;
230
new_server->prev = new_server;
231
*current_server = new_server;
232
/* Place the new server last in the list */
233
} else {
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
236
new_server->prev->next = new_server;
237
(*current_server)->prev = new_server;
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
return true;
245
}
246
247
165
/*
248
166
* Initialize GPGME.
249
167
*/
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
168
static bool init_gpgme(const char *seckey,
169
const char *pubkey, const char *tempdir){
252
170
gpgme_error_t rc;
253
171
gpgme_engine_info_t engine_info;
254
172
173
255
174
/*
256
175
* Helper function to insert pub and seckey to the engine keyring.
257
176
*/
262
181
263
182
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
264
183
if(fd == -1){
265
perror_plus("open");
184
perror("open");
266
185
return false;
267
186
}
268
187
269
188
rc = gpgme_data_new_from_fd(&pgp_data, fd);
270
189
if(rc != GPG_ERR_NO_ERROR){
271
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
272
gpgme_strsource(rc), gpgme_strerror(rc));
190
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
191
gpgme_strsource(rc), gpgme_strerror(rc));
273
192
return false;
274
193
}
275
194
276
rc = gpgme_op_import(mc->ctx, pgp_data);
195
rc = gpgme_op_import(mc.ctx, pgp_data);
277
196
if(rc != GPG_ERR_NO_ERROR){
278
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
gpgme_strsource(rc), gpgme_strerror(rc));
197
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
198
gpgme_strsource(rc), gpgme_strerror(rc));
280
199
return false;
281
200
}
282
201
283
202
ret = (int)TEMP_FAILURE_RETRY(close(fd));
284
203
if(ret == -1){
285
perror_plus("close");
204
perror("close");
286
205
}
287
206
gpgme_data_release(pgp_data);
288
207
return true;
289
208
}
290
209
291
210
if(debug){
292
fprintf_plus(stderr, "Initializing GPGME\n");
211
fprintf(stderr, "Initializing GPGME\n");
293
212
}
294
213
295
214
/* Init GPGME */
296
215
gpgme_check_version(NULL);
297
216
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
298
217
if(rc != GPG_ERR_NO_ERROR){
299
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
218
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
219
gpgme_strsource(rc), gpgme_strerror(rc));
301
220
return false;
302
221
}
303
222
304
/* Set GPGME home directory for the OpenPGP engine only */
223
/* Set GPGME home directory for the OpenPGP engine only */
305
224
rc = gpgme_get_engine_info(&engine_info);
306
225
if(rc != GPG_ERR_NO_ERROR){
307
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
308
gpgme_strsource(rc), gpgme_strerror(rc));
226
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
227
gpgme_strsource(rc), gpgme_strerror(rc));
309
228
return false;
310
229
}
311
230
while(engine_info != NULL){
317
236
engine_info = engine_info->next;
318
237
}
319
238
if(engine_info == NULL){
320
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
321
tempdir);
239
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
322
240
return false;
323
241
}
324
242
325
243
/* Create new GPGME "context" */
326
rc = gpgme_new(&(mc->ctx));
244
rc = gpgme_new(&(mc.ctx));
327
245
if(rc != GPG_ERR_NO_ERROR){
328
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
330
gpgme_strerror(rc));
246
fprintf(stderr, "bad gpgme_new: %s: %s\n",
247
gpgme_strsource(rc), gpgme_strerror(rc));
331
248
return false;
332
249
}
333
250
344
261
*/
345
262
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
263
size_t crypto_size,
347
char **plaintext,
348
mandos_context *mc){
264
char **plaintext){
349
265
gpgme_data_t dh_crypto, dh_plain;
350
266
gpgme_error_t rc;
351
267
ssize_t ret;
353
269
ssize_t plaintext_length = 0;
354
270
355
271
if(debug){
356
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
272
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
357
273
}
358
274
359
275
/* Create new GPGME data buffer from memory cryptotext */
360
276
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
361
277
0);
362
278
if(rc != GPG_ERR_NO_ERROR){
363
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
279
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
280
gpgme_strsource(rc), gpgme_strerror(rc));
365
281
return -1;
366
282
}
367
283
368
284
/* Create new empty GPGME data buffer for the plaintext */
369
285
rc = gpgme_data_new(&dh_plain);
370
286
if(rc != GPG_ERR_NO_ERROR){
371
fprintf_plus(stderr, "Mandos plugin mandos-client: "
372
"bad gpgme_data_new: %s: %s\n",
373
gpgme_strsource(rc), gpgme_strerror(rc));
287
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
288
gpgme_strsource(rc), gpgme_strerror(rc));
374
289
gpgme_data_release(dh_crypto);
375
290
return -1;
376
291
}
377
292
378
293
/* Decrypt data from the cryptotext data buffer to the plaintext
379
294
data buffer */
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
295
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
381
296
if(rc != GPG_ERR_NO_ERROR){
382
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
384
299
plaintext_length = -1;
385
300
if(debug){
386
301
gpgme_decrypt_result_t result;
387
result = gpgme_op_decrypt_result(mc->ctx);
302
result = gpgme_op_decrypt_result(mc.ctx);
388
303
if(result == NULL){
389
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
304
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
390
305
} else {
391
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
392
result->unsupported_algorithm);
393
fprintf_plus(stderr, "Wrong key usage: %u\n",
394
result->wrong_key_usage);
306
fprintf(stderr, "Unsupported algorithm: %s\n",
307
result->unsupported_algorithm);
308
fprintf(stderr, "Wrong key usage: %u\n",
309
result->wrong_key_usage);
395
310
if(result->file_name != NULL){
396
fprintf_plus(stderr, "File name: %s\n", result->file_name);
311
fprintf(stderr, "File name: %s\n", result->file_name);
397
312
}
398
313
gpgme_recipient_t recipient;
399
314
recipient = result->recipients;
400
315
while(recipient != NULL){
401
fprintf_plus(stderr, "Public key algorithm: %s\n",
402
gpgme_pubkey_algo_name
403
(recipient->pubkey_algo));
404
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
405
fprintf_plus(stderr, "Secret key available: %s\n",
406
recipient->status == GPG_ERR_NO_SECKEY
407
? "No" : "Yes");
316
fprintf(stderr, "Public key algorithm: %s\n",
317
gpgme_pubkey_algo_name(recipient->pubkey_algo));
318
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
319
fprintf(stderr, "Secret key available: %s\n",
320
recipient->status == GPG_ERR_NO_SECKEY
321
? "No" : "Yes");
408
322
recipient = recipient->next;
409
323
}
410
324
}
413
327
}
414
328
415
329
if(debug){
416
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
330
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
417
331
}
418
332
419
333
/* Seek back to the beginning of the GPGME plaintext data buffer */
420
334
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
421
perror_plus("gpgme_data_seek");
335
perror("gpgme_data_seek");
422
336
plaintext_length = -1;
423
337
goto decrypt_end;
424
338
}
426
340
*plaintext = NULL;
427
341
while(true){
428
342
plaintext_capacity = incbuffer(plaintext,
429
(size_t)plaintext_length,
430
plaintext_capacity);
343
(size_t)plaintext_length,
344
plaintext_capacity);
431
345
if(plaintext_capacity == 0){
432
perror_plus("incbuffer");
433
plaintext_length = -1;
434
goto decrypt_end;
346
perror("incbuffer");
347
plaintext_length = -1;
348
goto decrypt_end;
435
349
}
436
350
437
351
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
442
356
break;
443
357
}
444
358
if(ret < 0){
445
perror_plus("gpgme_data_read");
359
perror("gpgme_data_read");
446
360
plaintext_length = -1;
447
361
goto decrypt_end;
448
362
}
450
364
}
451
365
452
366
if(debug){
453
fprintf_plus(stderr, "Decrypted password is: ");
367
fprintf(stderr, "Decrypted password is: ");
454
368
for(ssize_t i = 0; i < plaintext_length; i++){
455
369
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
370
}
468
382
}
469
383
470
384
static const char * safer_gnutls_strerror(int value){
471
const char *ret = gnutls_strerror(value);
385
const char *ret = gnutls_strerror(value); /* Spurious warning from
386
-Wunreachable-code */
472
387
if(ret == NULL)
473
388
ret = "(unknown)";
474
389
return ret;
477
392
/* GnuTLS log function callback */
478
393
static void debuggnutls(__attribute__((unused)) int level,
479
394
const char* string){
480
fprintf_plus(stderr, "GnuTLS: %s", string);
395
fprintf(stderr, "GnuTLS: %s", string);
481
396
}
482
397
483
398
static int init_gnutls_global(const char *pubkeyfilename,
484
const char *seckeyfilename,
485
mandos_context *mc){
399
const char *seckeyfilename){
486
400
int ret;
487
401
488
402
if(debug){
489
fprintf_plus(stderr, "Initializing GnuTLS\n");
403
fprintf(stderr, "Initializing GnuTLS\n");
490
404
}
491
405
492
406
ret = gnutls_global_init();
493
407
if(ret != GNUTLS_E_SUCCESS){
494
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
495
safer_gnutls_strerror(ret));
408
fprintf(stderr, "GnuTLS global_init: %s\n",
409
safer_gnutls_strerror(ret));
496
410
return -1;
497
411
}
498
412
505
419
}
506
420
507
421
/* OpenPGP credentials */
508
ret = gnutls_certificate_allocate_credentials(&mc->cred);
422
gnutls_certificate_allocate_credentials(&mc.cred);
509
423
if(ret != GNUTLS_E_SUCCESS){
510
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
511
safer_gnutls_strerror(ret));
424
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
425
from
426
-Wunreachable-code
427
*/
428
safer_gnutls_strerror(ret));
512
429
gnutls_global_deinit();
513
430
return -1;
514
431
}
515
432
516
433
if(debug){
517
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
518
" secret key %s as GnuTLS credentials\n",
519
pubkeyfilename,
520
seckeyfilename);
434
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
435
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
436
seckeyfilename);
521
437
}
522
438
523
439
ret = gnutls_certificate_set_openpgp_key_file
524
(mc->cred, pubkeyfilename, seckeyfilename,
440
(mc.cred, pubkeyfilename, seckeyfilename,
525
441
GNUTLS_OPENPGP_FMT_BASE64);
526
442
if(ret != GNUTLS_E_SUCCESS){
527
fprintf_plus(stderr,
528
"Error[%d] while reading the OpenPGP key pair ('%s',"
529
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
530
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
531
safer_gnutls_strerror(ret));
443
fprintf(stderr,
444
"Error[%d] while reading the OpenPGP key pair ('%s',"
445
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
fprintf(stderr, "The GnuTLS error is: %s\n",
447
safer_gnutls_strerror(ret));
532
448
goto globalfail;
533
449
}
534
450
535
451
/* GnuTLS server initialization */
536
ret = gnutls_dh_params_init(&mc->dh_params);
452
ret = gnutls_dh_params_init(&mc.dh_params);
537
453
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
" initialization: %s\n",
540
safer_gnutls_strerror(ret));
454
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
455
" %s\n", safer_gnutls_strerror(ret));
541
456
goto globalfail;
542
457
}
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
458
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
544
459
if(ret != GNUTLS_E_SUCCESS){
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
safer_gnutls_strerror(ret));
460
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
461
safer_gnutls_strerror(ret));
547
462
goto globalfail;
548
463
}
549
464
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
465
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
551
466
552
467
return 0;
553
468
554
469
globalfail:
555
470
556
gnutls_certificate_free_credentials(mc->cred);
471
gnutls_certificate_free_credentials(mc.cred);
557
472
gnutls_global_deinit();
558
gnutls_dh_params_deinit(mc->dh_params);
473
gnutls_dh_params_deinit(mc.dh_params);
559
474
return -1;
560
475
}
561
476
562
static int init_gnutls_session(gnutls_session_t *session,
563
mandos_context *mc){
477
static int init_gnutls_session(gnutls_session_t *session){
564
478
int ret;
565
479
/* GnuTLS session creation */
566
480
do {
570
484
}
571
485
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
572
486
if(ret != GNUTLS_E_SUCCESS){
573
fprintf_plus(stderr,
574
"Error in GnuTLS session initialization: %s\n",
575
safer_gnutls_strerror(ret));
487
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
488
safer_gnutls_strerror(ret));
576
489
}
577
490
578
491
{
579
492
const char *err;
580
493
do {
581
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
494
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
582
495
if(quit_now){
583
496
gnutls_deinit(*session);
584
497
return -1;
585
498
}
586
499
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
587
500
if(ret != GNUTLS_E_SUCCESS){
588
fprintf_plus(stderr, "Syntax error at: %s\n", err);
589
fprintf_plus(stderr, "GnuTLS error: %s\n",
590
safer_gnutls_strerror(ret));
501
fprintf(stderr, "Syntax error at: %s\n", err);
502
fprintf(stderr, "GnuTLS error: %s\n",
503
safer_gnutls_strerror(ret));
591
504
gnutls_deinit(*session);
592
505
return -1;
593
506
}
595
508
596
509
do {
597
510
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
mc->cred);
511
mc.cred);
599
512
if(quit_now){
600
513
gnutls_deinit(*session);
601
514
return -1;
602
515
}
603
516
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
604
517
if(ret != GNUTLS_E_SUCCESS){
605
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
606
safer_gnutls_strerror(ret));
518
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
519
safer_gnutls_strerror(ret));
607
520
gnutls_deinit(*session);
608
521
return -1;
609
522
}
611
524
/* ignore client certificate if any. */
612
525
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
526
614
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
527
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
615
528
616
529
return 0;
617
530
}
621
534
__attribute__((unused)) const char *txt){}
622
535
623
536
/* Called when a Mandos server is found */
624
static int start_mandos_communication(const char *ip, in_port_t port,
537
static int start_mandos_communication(const char *ip, uint16_t port,
625
538
AvahiIfIndex if_index,
626
int af, mandos_context *mc){
539
int af){
627
540
int ret, tcp_sd = -1;
628
541
ssize_t sret;
629
542
union {
639
552
gnutls_session_t session;
640
553
int pf; /* Protocol family */
641
554
642
errno = 0;
643
644
555
if(quit_now){
645
errno = EINTR;
646
556
return -1;
647
557
}
648
558
654
564
pf = PF_INET;
655
565
break;
656
566
default:
657
fprintf_plus(stderr, "Bad address family: %d\n", af);
658
errno = EINVAL;
567
fprintf(stderr, "Bad address family: %d\n", af);
659
568
return -1;
660
569
}
661
570
662
ret = init_gnutls_session(&session, mc);
571
ret = init_gnutls_session(&session);
663
572
if(ret != 0){
664
573
return -1;
665
574
}
666
575
667
576
if(debug){
668
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
669
PRIuMAX "\n", ip, (uintmax_t)port);
577
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
578
"\n", ip, port);
670
579
}
671
580
672
581
tcp_sd = socket(pf, SOCK_STREAM, 0);
673
582
if(tcp_sd < 0){
674
int e = errno;
675
perror_plus("socket");
676
errno = e;
583
perror("socket");
677
584
goto mandos_end;
678
585
}
679
586
680
587
if(quit_now){
681
errno = EINTR;
682
588
goto mandos_end;
683
589
}
684
590
691
597
ret = inet_pton(af, ip, &to.in.sin_addr);
692
598
}
693
599
if(ret < 0 ){
694
int e = errno;
695
perror_plus("inet_pton");
696
errno = e;
600
perror("inet_pton");
697
601
goto mandos_end;
698
602
}
699
603
if(ret == 0){
700
int e = errno;
701
fprintf_plus(stderr, "Bad address: %s\n", ip);
702
errno = e;
604
fprintf(stderr, "Bad address: %s\n", ip);
703
605
goto mandos_end;
704
606
}
705
607
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
608
to.in6.sin6_port = htons(port); /* Spurious warnings from
609
-Wconversion and
610
-Wunreachable-code */
611
707
612
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
613
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
-Wunreachable-code*/
614
-Wunreachable-code*/
710
615
if(if_index == AVAHI_IF_UNSPEC){
711
fprintf_plus(stderr, "An IPv6 link-local address is"
712
" incomplete without a network interface\n");
713
errno = EINVAL;
616
fprintf(stderr, "An IPv6 link-local address is incomplete"
617
" without a network interface\n");
714
618
goto mandos_end;
715
619
}
716
620
/* Set the network interface number as scope */
723
627
}
724
628
725
629
if(quit_now){
726
errno = EINTR;
727
630
goto mandos_end;
728
631
}
729
632
731
634
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
732
635
char interface[IF_NAMESIZE];
733
636
if(if_indextoname((unsigned int)if_index, interface) == NULL){
734
perror_plus("if_indextoname");
637
perror("if_indextoname");
735
638
} else {
736
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
737
"\n", ip, interface, (uintmax_t)port);
639
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
640
ip, interface, port);
738
641
}
739
642
} else {
740
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
741
ip, (uintmax_t)port);
643
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
644
port);
742
645
}
743
646
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
647
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
751
654
sizeof(addrstr));
752
655
}
753
656
if(pcret == NULL){
754
perror_plus("inet_ntop");
657
perror("inet_ntop");
755
658
} else {
756
659
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
660
fprintf(stderr, "Canonical address form: %s\n", addrstr);
758
661
}
759
662
}
760
663
}
761
664
762
665
if(quit_now){
763
errno = EINTR;
764
666
goto mandos_end;
765
667
}
766
668
770
672
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
771
673
}
772
674
if(ret < 0){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
774
int e = errno;
775
perror_plus("connect");
776
errno = e;
777
}
675
perror("connect");
778
676
goto mandos_end;
779
677
}
780
678
781
679
if(quit_now){
782
errno = EINTR;
783
680
goto mandos_end;
784
681
}
785
682
788
685
while(true){
789
686
size_t out_size = strlen(out);
790
687
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
791
out_size - written));
688
out_size - written));
792
689
if(ret == -1){
793
int e = errno;
794
perror_plus("write");
795
errno = e;
690
perror("write");
796
691
goto mandos_end;
797
692
}
798
693
written += (size_t)ret;
808
703
}
809
704
810
705
if(quit_now){
811
errno = EINTR;
812
706
goto mandos_end;
813
707
}
814
708
}
815
709
816
710
if(debug){
817
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
711
fprintf(stderr, "Establishing TLS session with %s\n", ip);
818
712
}
819
713
820
714
if(quit_now){
821
errno = EINTR;
822
715
goto mandos_end;
823
716
}
824
717
825
/* This casting via intptr_t is to eliminate warning about casting
826
an int to a pointer type. This is exactly how the GnuTLS Guile
827
function "set-session-transport-fd!" does it. */
828
gnutls_transport_set_ptr(session,
829
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
718
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
830
719
831
720
if(quit_now){
832
errno = EINTR;
833
721
goto mandos_end;
834
722
}
835
723
836
724
do {
837
725
ret = gnutls_handshake(session);
838
726
if(quit_now){
839
errno = EINTR;
840
727
goto mandos_end;
841
728
}
842
729
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
843
730
844
731
if(ret != GNUTLS_E_SUCCESS){
845
732
if(debug){
846
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
733
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
847
734
gnutls_perror(ret);
848
735
}
849
errno = EPROTO;
850
736
goto mandos_end;
851
737
}
852
738
853
739
/* Read OpenPGP packet that contains the wanted password */
854
740
855
741
if(debug){
856
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
857
" %s\n", ip);
742
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
743
ip);
858
744
}
859
745
860
746
while(true){
861
747
862
748
if(quit_now){
863
errno = EINTR;
864
749
goto mandos_end;
865
750
}
866
751
867
752
buffer_capacity = incbuffer(&buffer, buffer_length,
868
buffer_capacity);
753
buffer_capacity);
869
754
if(buffer_capacity == 0){
870
int e = errno;
871
perror_plus("incbuffer");
872
errno = e;
755
perror("incbuffer");
873
756
goto mandos_end;
874
757
}
875
758
876
759
if(quit_now){
877
errno = EINTR;
878
760
goto mandos_end;
879
761
}
880
762
893
775
ret = gnutls_handshake(session);
894
776
895
777
if(quit_now){
896
errno = EINTR;
897
778
goto mandos_end;
898
779
}
899
780
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
900
781
if(ret < 0){
901
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
902
"***\n");
782
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
903
783
gnutls_perror(ret);
904
errno = EPROTO;
905
784
goto mandos_end;
906
785
}
907
786
break;
908
787
default:
909
fprintf_plus(stderr, "Unknown error while reading data from"
910
" encrypted session with Mandos server\n");
788
fprintf(stderr, "Unknown error while reading data from"
789
" encrypted session with Mandos server\n");
911
790
gnutls_bye(session, GNUTLS_SHUT_RDWR);
912
errno = EIO;
913
791
goto mandos_end;
914
792
}
915
793
} else {
918
796
}
919
797
920
798
if(debug){
921
fprintf_plus(stderr, "Closing TLS session\n");
799
fprintf(stderr, "Closing TLS session\n");
922
800
}
923
801
924
802
if(quit_now){
925
errno = EINTR;
926
803
goto mandos_end;
927
804
}
928
805
929
806
do {
930
807
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
931
808
if(quit_now){
932
errno = EINTR;
933
809
goto mandos_end;
934
810
}
935
811
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
936
812
937
813
if(buffer_length > 0){
938
814
ssize_t decrypted_buffer_size;
939
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
940
&decrypted_buffer, mc);
815
decrypted_buffer_size = pgp_packet_decrypt(buffer,
816
buffer_length,
817
&decrypted_buffer);
941
818
if(decrypted_buffer_size >= 0){
942
819
943
820
written = 0;
944
821
while(written < (size_t) decrypted_buffer_size){
945
822
if(quit_now){
946
errno = EINTR;
947
823
goto mandos_end;
948
824
}
949
825
951
827
(size_t)decrypted_buffer_size - written,
952
828
stdout);
953
829
if(ret == 0 and ferror(stdout)){
954
int e = errno;
955
830
if(debug){
956
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
957
strerror(errno));
831
fprintf(stderr, "Error writing encrypted data: %s\n",
832
strerror(errno));
958
833
}
959
errno = e;
960
834
goto mandos_end;
961
835
}
962
836
written += (size_t)ret;
968
842
/* Shutdown procedure */
969
843
970
844
mandos_end:
971
{
972
int e = errno;
973
free(decrypted_buffer);
974
free(buffer);
975
if(tcp_sd >= 0){
976
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
977
}
978
if(ret == -1){
979
if(e == 0){
980
e = errno;
981
}
982
perror_plus("close");
983
}
984
gnutls_deinit(session);
985
errno = e;
986
if(quit_now){
987
errno = EINTR;
988
retval = -1;
989
}
845
free(decrypted_buffer);
846
free(buffer);
847
if(tcp_sd >= 0){
848
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
849
}
850
if(ret == -1){
851
perror("close");
852
}
853
gnutls_deinit(session);
854
if(quit_now){
855
retval = -1;
990
856
}
991
857
return retval;
992
858
}
1004
870
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
871
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
872
flags,
1007
void* mc){
1008
if(r == NULL){
1009
return;
1010
}
873
AVAHI_GCC_UNUSED void* userdata){
874
assert(r);
1011
875
1012
876
/* Called whenever a service has been resolved successfully or
1013
877
timed out */
1019
883
switch(event){
1020
884
default:
1021
885
case AVAHI_RESOLVER_FAILURE:
1022
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
domain,
1025
avahi_strerror(avahi_server_errno
1026
(((mandos_context*)mc)->server)));
886
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
887
" of type '%s' in domain '%s': %s\n", name, type, domain,
888
avahi_strerror(avahi_server_errno(mc.server)));
1027
889
break;
1028
890
1029
891
case AVAHI_RESOLVER_FOUND:
1031
893
char ip[AVAHI_ADDRESS_STR_MAX];
1032
894
avahi_address_snprint(ip, sizeof(ip), address);
1033
895
if(debug){
1034
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1035
PRIdMAX ") on port %" PRIu16 "\n", name,
1036
host_name, ip, (intmax_t)interface, port);
896
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
897
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
898
ip, (intmax_t)interface, port);
1037
899
}
1038
int ret = start_mandos_communication(ip, (in_port_t)port,
1039
interface,
1040
avahi_proto_to_af(proto),
1041
mc);
900
int ret = start_mandos_communication(ip, port, interface,
901
avahi_proto_to_af(proto));
1042
902
if(ret == 0){
1043
avahi_simple_poll_quit(simple_poll);
1044
} else {
1045
if(not add_server(ip, (in_port_t)port, interface,
1046
avahi_proto_to_af(proto),
1047
&((mandos_context*)mc)->current_server)){
1048
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1049
" list\n", name);
1050
}
903
avahi_simple_poll_quit(mc.simple_poll);
1051
904
}
1052
905
}
1053
906
}
1063
916
const char *domain,
1064
917
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1065
918
flags,
1066
void* mc){
1067
if(b == NULL){
1068
return;
1069
}
919
AVAHI_GCC_UNUSED void* userdata){
920
assert(b);
1070
921
1071
922
/* Called whenever a new services becomes available on the LAN or
1072
923
is removed from the LAN */
1079
930
default:
1080
931
case AVAHI_BROWSER_FAILURE:
1081
932
1082
fprintf_plus(stderr, "(Avahi browser) %s\n",
1083
avahi_strerror(avahi_server_errno
1084
(((mandos_context*)mc)->server)));
1085
avahi_simple_poll_quit(simple_poll);
933
fprintf(stderr, "(Avahi browser) %s\n",
934
avahi_strerror(avahi_server_errno(mc.server)));
935
avahi_simple_poll_quit(mc.simple_poll);
1086
936
return;
1087
937
1088
938
case AVAHI_BROWSER_NEW:
1091
941
the callback function is called the Avahi server will free the
1092
942
resolver for us. */
1093
943
1094
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1095
interface, protocol, name, type,
1096
domain, protocol, 0,
1097
resolve_callback, mc) == NULL)
1098
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1099
" %s\n", name,
1100
avahi_strerror(avahi_server_errno
1101
(((mandos_context*)mc)->server)));
944
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
945
name, type, domain, protocol, 0,
946
resolve_callback, NULL) == NULL)
947
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
948
name, avahi_strerror(avahi_server_errno(mc.server)));
1102
949
break;
1103
950
1104
951
case AVAHI_BROWSER_REMOVE:
1107
954
case AVAHI_BROWSER_ALL_FOR_NOW:
1108
955
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1109
956
if(debug){
1110
fprintf_plus(stderr, "No Mandos server found, still"
1111
" searching...\n");
957
fprintf(stderr, "No Mandos server found, still searching...\n");
1112
958
}
1113
959
break;
1114
960
}
1115
961
}
1116
962
1117
/* Signal handler that stops main loop after SIGTERM */
963
/* stop main loop after sigterm has been called */
1118
964
static void handle_sigterm(int sig){
1119
965
if(quit_now){
1120
966
return;
1122
968
quit_now = 1;
1123
969
signal_received = sig;
1124
970
int old_errno = errno;
1125
/* set main loop to exit */
1126
if(simple_poll != NULL){
1127
avahi_simple_poll_quit(simple_poll);
1128
}
1129
errno = old_errno;
1130
}
1131
1132
bool get_flags(const char *ifname, struct ifreq *ifr){
1133
int ret;
1134
error_t ret_errno;
1135
1136
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1137
if(s < 0){
1138
ret_errno = errno;
1139
perror_plus("socket");
1140
errno = ret_errno;
1141
return false;
1142
}
1143
strcpy(ifr->ifr_name, ifname);
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
if(ret == -1){
1146
if(debug){
1147
ret_errno = errno;
1148
perror_plus("ioctl SIOCGIFFLAGS");
1149
errno = ret_errno;
1150
}
1151
return false;
1152
}
1153
return true;
1154
}
1155
1156
bool good_flags(const char *ifname, const struct ifreq *ifr){
1157
1158
/* Reject the loopback device */
1159
if(ifr->ifr_flags & IFF_LOOPBACK){
1160
if(debug){
1161
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1162
ifname);
1163
}
1164
return false;
1165
}
1166
/* Accept point-to-point devices only if connect_to is specified */
1167
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1168
if(debug){
1169
fprintf_plus(stderr, "Accepting point-to-point interface"
1170
" \"%s\"\n", ifname);
1171
}
1172
return true;
1173
}
1174
/* Otherwise, reject non-broadcast-capable devices */
1175
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1176
if(debug){
1177
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1178
" \"%s\"\n", ifname);
1179
}
1180
return false;
1181
}
1182
/* Reject non-ARP interfaces (including dummy interfaces) */
1183
if(ifr->ifr_flags & IFF_NOARP){
1184
if(debug){
1185
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1186
ifname);
1187
}
1188
return false;
1189
}
1190
1191
/* Accept this device */
1192
if(debug){
1193
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1194
}
1195
return true;
1196
}
1197
1198
/*
1199
* This function determines if a directory entry in /sys/class/net
1200
* corresponds to an acceptable network device.
1201
* (This function is passed to scandir(3) as a filter function.)
1202
*/
1203
int good_interface(const struct dirent *if_entry){
1204
if(if_entry->d_name[0] == '.'){
1205
return 0;
1206
}
1207
1208
struct ifreq ifr;
1209
if(not get_flags(if_entry->d_name, &ifr)){
1210
if(debug){
1211
fprintf_plus(stderr, "Failed to get flags for interface "
1212
"\"%s\"\n", if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a network interface is up.
1225
*/
1226
bool interface_is_up(const char *interface){
1227
struct ifreq ifr;
1228
if(not get_flags(interface, &ifr)){
1229
if(debug){
1230
fprintf_plus(stderr, "Failed to get flags for interface "
1231
"\"%s\"\n", interface);
1232
}
1233
return false;
1234
}
1235
1236
return (bool)(ifr.ifr_flags & IFF_UP);
1237
}
1238
1239
/*
1240
* This function determines if a network interface is running
1241
*/
1242
bool interface_is_running(const char *interface){
1243
struct ifreq ifr;
1244
if(not get_flags(interface, &ifr)){
1245
if(debug){
1246
fprintf_plus(stderr, "Failed to get flags for interface "
1247
"\"%s\"\n", interface);
1248
}
1249
return false;
1250
}
1251
1252
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1253
}
1254
1255
int notdotentries(const struct dirent *direntry){
1256
/* Skip "." and ".." */
1257
if(direntry->d_name[0] == '.'
1258
and (direntry->d_name[1] == '\0'
1259
or (direntry->d_name[1] == '.'
1260
and direntry->d_name[2] == '\0'))){
1261
return 0;
1262
}
1263
return 1;
1264
}
1265
1266
/* Is this directory entry a runnable program? */
1267
int runnable_hook(const struct dirent *direntry){
1268
int ret;
1269
size_t sret;
1270
struct stat st;
1271
1272
if((direntry->d_name)[0] == '\0'){
1273
/* Empty name? */
1274
return 0;
1275
}
1276
1277
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1278
"abcdefghijklmnopqrstuvwxyz"
1279
"0123456789"
1280
"_-");
1281
if((direntry->d_name)[sret] != '\0'){
1282
/* Contains non-allowed characters */
1283
if(debug){
1284
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1285
direntry->d_name);
1286
}
1287
return 0;
1288
}
1289
1290
char *fullname = NULL;
1291
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1292
if(ret < 0){
1293
perror_plus("asprintf");
1294
return 0;
1295
}
1296
1297
ret = stat(fullname, &st);
1298
if(ret == -1){
1299
if(debug){
1300
perror_plus("Could not stat hook");
1301
}
1302
return 0;
1303
}
1304
if(not (S_ISREG(st.st_mode))){
1305
/* Not a regular file */
1306
if(debug){
1307
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1308
direntry->d_name);
1309
}
1310
return 0;
1311
}
1312
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1313
/* Not executable */
1314
if(debug){
1315
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1316
direntry->d_name);
1317
}
1318
return 0;
1319
}
1320
if(debug){
1321
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1322
direntry->d_name);
1323
}
1324
return 1;
1325
}
1326
1327
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1328
mandos_context *mc){
1329
int ret;
1330
struct timespec now;
1331
struct timespec waited_time;
1332
intmax_t block_time;
1333
1334
while(true){
1335
if(mc->current_server == NULL){
1336
if (debug){
1337
fprintf_plus(stderr, "Wait until first server is found."
1338
" No timeout!\n");
1339
}
1340
ret = avahi_simple_poll_iterate(s, -1);
1341
} else {
1342
if (debug){
1343
fprintf_plus(stderr, "Check current_server if we should run"
1344
" it, or wait\n");
1345
}
1346
/* the current time */
1347
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1348
if(ret == -1){
1349
perror_plus("clock_gettime");
1350
return -1;
1351
}
1352
/* Calculating in ms how long time between now and server
1353
who we visted longest time ago. Now - last seen. */
1354
waited_time.tv_sec = (now.tv_sec
1355
- mc->current_server->last_seen.tv_sec);
1356
waited_time.tv_nsec = (now.tv_nsec
1357
- mc->current_server->last_seen.tv_nsec);
1358
/* total time is 10s/10,000ms.
1359
Converting to s from ms by dividing by 1,000,
1360
and ns to ms by dividing by 1,000,000. */
1361
block_time = ((retry_interval
1362
- ((intmax_t)waited_time.tv_sec * 1000))
1363
- ((intmax_t)waited_time.tv_nsec / 1000000));
1364
1365
if (debug){
1366
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1367
block_time);
1368
}
1369
1370
if(block_time <= 0){
1371
ret = start_mandos_communication(mc->current_server->ip,
1372
mc->current_server->port,
1373
mc->current_server->if_index,
1374
mc->current_server->af, mc);
1375
if(ret == 0){
1376
avahi_simple_poll_quit(s);
1377
return 0;
1378
}
1379
ret = clock_gettime(CLOCK_MONOTONIC,
1380
&mc->current_server->last_seen);
1381
if(ret == -1){
1382
perror_plus("clock_gettime");
1383
return -1;
1384
}
1385
mc->current_server = mc->current_server->next;
1386
block_time = 0; /* Call avahi to find new Mandos
1387
servers, but don't block */
1388
}
1389
1390
ret = avahi_simple_poll_iterate(s, (int)block_time);
1391
}
1392
if(ret != 0){
1393
if (ret > 0 or errno != EINTR){
1394
return (ret != 1) ? ret : 0;
1395
}
1396
}
1397
}
1398
}
1399
1400
/* Set effective uid to 0, return errno */
1401
error_t raise_privileges(void){
1402
error_t old_errno = errno;
1403
error_t ret_errno = 0;
1404
if(seteuid(0) == -1){
1405
ret_errno = errno;
1406
perror_plus("seteuid");
1407
}
1408
errno = old_errno;
1409
return ret_errno;
1410
}
1411
1412
/* Set effective and real user ID to 0. Return errno. */
1413
error_t raise_privileges_permanently(void){
1414
error_t old_errno = errno;
1415
error_t ret_errno = raise_privileges();
1416
if(ret_errno != 0){
1417
errno = old_errno;
1418
return ret_errno;
1419
}
1420
if(setuid(0) == -1){
1421
ret_errno = errno;
1422
perror_plus("seteuid");
1423
}
1424
errno = old_errno;
1425
return ret_errno;
1426
}
1427
1428
/* Set effective user ID to unprivileged saved user ID */
1429
error_t lower_privileges(void){
1430
error_t old_errno = errno;
1431
error_t ret_errno = 0;
1432
if(seteuid(uid) == -1){
1433
ret_errno = errno;
1434
perror_plus("seteuid");
1435
}
1436
errno = old_errno;
1437
return ret_errno;
1438
}
1439
1440
/* Lower privileges permanently */
1441
error_t lower_privileges_permanently(void){
1442
error_t old_errno = errno;
1443
error_t ret_errno = 0;
1444
if(setuid(uid) == -1){
1445
ret_errno = errno;
1446
perror_plus("setuid");
1447
}
1448
errno = old_errno;
1449
return ret_errno;
1450
}
1451
1452
bool run_network_hooks(const char *mode, const char *interface,
1453
const float delay){
1454
struct dirent **direntries;
1455
struct dirent *direntry;
1456
int ret;
1457
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1458
alphasort);
1459
if(numhooks == -1){
1460
if(errno == ENOENT){
1461
if(debug){
1462
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1463
" found\n", hookdir);
1464
}
1465
} else {
1466
perror_plus("scandir");
1467
}
1468
} else {
1469
int devnull = open("/dev/null", O_RDONLY);
1470
for(int i = 0; i < numhooks; i++){
1471
direntry = direntries[i];
1472
char *fullname = NULL;
1473
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1474
if(ret < 0){
1475
perror_plus("asprintf");
1476
continue;
1477
}
1478
if(debug){
1479
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1480
direntry->d_name);
1481
}
1482
pid_t hook_pid = fork();
1483
if(hook_pid == 0){
1484
/* Child */
1485
/* Raise privileges */
1486
raise_privileges_permanently();
1487
/* Set group */
1488
errno = 0;
1489
ret = setgid(0);
1490
if(ret == -1){
1491
perror_plus("setgid");
1492
}
1493
/* Reset supplementary groups */
1494
errno = 0;
1495
ret = setgroups(0, NULL);
1496
if(ret == -1){
1497
perror_plus("setgroups");
1498
}
1499
dup2(devnull, STDIN_FILENO);
1500
close(devnull);
1501
dup2(STDERR_FILENO, STDOUT_FILENO);
1502
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1503
if(ret == -1){
1504
perror_plus("setenv");
1505
_exit(EX_OSERR);
1506
}
1507
ret = setenv("DEVICE", interface, 1);
1508
if(ret == -1){
1509
perror_plus("setenv");
1510
_exit(EX_OSERR);
1511
}
1512
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1513
if(ret == -1){
1514
perror_plus("setenv");
1515
_exit(EX_OSERR);
1516
}
1517
ret = setenv("MODE", mode, 1);
1518
if(ret == -1){
1519
perror_plus("setenv");
1520
_exit(EX_OSERR);
1521
}
1522
char *delaystring;
1523
ret = asprintf(&delaystring, "%f", delay);
1524
if(ret == -1){
1525
perror_plus("asprintf");
1526
_exit(EX_OSERR);
1527
}
1528
ret = setenv("DELAY", delaystring, 1);
1529
if(ret == -1){
1530
free(delaystring);
1531
perror_plus("setenv");
1532
_exit(EX_OSERR);
1533
}
1534
free(delaystring);
1535
if(connect_to != NULL){
1536
ret = setenv("CONNECT", connect_to, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
}
1542
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1543
perror_plus("execl");
1544
_exit(EXIT_FAILURE);
1545
}
1546
} else {
1547
int status;
1548
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1549
perror_plus("waitpid");
1550
free(fullname);
1551
continue;
1552
}
1553
if(WIFEXITED(status)){
1554
if(WEXITSTATUS(status) != 0){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1556
" with status %d\n", direntry->d_name,
1557
WEXITSTATUS(status));
1558
free(fullname);
1559
continue;
1560
}
1561
} else if(WIFSIGNALED(status)){
1562
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1563
" signal %d\n", direntry->d_name,
1564
WTERMSIG(status));
1565
free(fullname);
1566
continue;
1567
} else {
1568
fprintf_plus(stderr, "Warning: network hook \"%s\""
1569
" crashed\n", direntry->d_name);
1570
free(fullname);
1571
continue;
1572
}
1573
}
1574
free(fullname);
1575
if(debug){
1576
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1577
direntry->d_name);
1578
}
1579
}
1580
close(devnull);
1581
}
1582
return true;
1583
}
1584
1585
error_t bring_up_interface(const char *const interface,
1586
const float delay){
1587
int sd = -1;
1588
error_t old_errno = errno;
1589
error_t ret_errno = 0;
1590
int ret, ret_setflags;
1591
struct ifreq network;
1592
unsigned int if_index = if_nametoindex(interface);
1593
if(if_index == 0){
1594
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1595
errno = old_errno;
1596
return ENXIO;
1597
}
1598
1599
if(quit_now){
1600
errno = old_errno;
1601
return EINTR;
1602
}
1603
1604
if(not interface_is_up(interface)){
1605
if(not get_flags(interface, &network) and debug){
1606
ret_errno = errno;
1607
fprintf_plus(stderr, "Failed to get flags for interface "
1608
"\"%s\"\n", interface);
1609
return ret_errno;
1610
}
1611
network.ifr_flags |= IFF_UP;
1612
1613
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1614
if(sd < 0){
1615
ret_errno = errno;
1616
perror_plus("socket");
1617
errno = old_errno;
1618
return ret_errno;
1619
}
1620
1621
if(quit_now){
1622
close(sd);
1623
errno = old_errno;
1624
return EINTR;
1625
}
1626
1627
if(debug){
1628
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1629
interface);
1630
}
1631
1632
/* Raise priviliges */
1633
raise_privileges();
1634
1635
#ifdef __linux__
1636
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1637
messages about the network interface to mess up the prompt */
1638
int ret_linux = klogctl(8, NULL, 5);
1639
bool restore_loglevel = true;
1640
if(ret_linux == -1){
1641
restore_loglevel = false;
1642
perror_plus("klogctl");
1643
}
1644
#endif /* __linux__ */
1645
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1646
ret_errno = errno;
1647
#ifdef __linux__
1648
if(restore_loglevel){
1649
ret_linux = klogctl(7, NULL, 0);
1650
if(ret_linux == -1){
1651
perror_plus("klogctl");
1652
}
1653
}
1654
#endif /* __linux__ */
1655
1656
/* Lower privileges */
1657
lower_privileges();
1658
1659
/* Close the socket */
1660
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1661
if(ret == -1){
1662
perror_plus("close");
1663
}
1664
1665
if(ret_setflags == -1){
1666
errno = ret_errno;
1667
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1668
errno = old_errno;
1669
return ret_errno;
1670
}
1671
} else if(debug){
1672
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1673
interface);
1674
}
1675
1676
/* Sleep checking until interface is running.
1677
Check every 0.25s, up to total time of delay */
1678
for(int i=0; i < delay * 4; i++){
1679
if(interface_is_running(interface)){
1680
break;
1681
}
1682
struct timespec sleeptime = { .tv_nsec = 250000000 };
1683
ret = nanosleep(&sleeptime, NULL);
1684
if(ret == -1 and errno != EINTR){
1685
perror_plus("nanosleep");
1686
}
1687
}
1688
1689
errno = old_errno;
1690
return 0;
1691
}
1692
1693
error_t take_down_interface(const char *const interface){
1694
int sd = -1;
1695
error_t old_errno = errno;
1696
error_t ret_errno = 0;
1697
int ret, ret_setflags;
1698
struct ifreq network;
1699
unsigned int if_index = if_nametoindex(interface);
1700
if(if_index == 0){
1701
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1702
errno = old_errno;
1703
return ENXIO;
1704
}
1705
if(interface_is_up(interface)){
1706
if(not get_flags(interface, &network) and debug){
1707
ret_errno = errno;
1708
fprintf_plus(stderr, "Failed to get flags for interface "
1709
"\"%s\"\n", interface);
1710
return ret_errno;
1711
}
1712
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1713
1714
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1715
if(sd < 0){
1716
ret_errno = errno;
1717
perror_plus("socket");
1718
errno = old_errno;
1719
return ret_errno;
1720
}
1721
1722
if(debug){
1723
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1724
interface);
1725
}
1726
1727
/* Raise priviliges */
1728
raise_privileges();
1729
1730
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1731
ret_errno = errno;
1732
1733
/* Lower privileges */
1734
lower_privileges();
1735
1736
/* Close the socket */
1737
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1738
if(ret == -1){
1739
perror_plus("close");
1740
}
1741
1742
if(ret_setflags == -1){
1743
errno = ret_errno;
1744
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1745
errno = old_errno;
1746
return ret_errno;
1747
}
1748
} else if(debug){
1749
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1750
interface);
1751
}
1752
1753
errno = old_errno;
1754
return 0;
971
if(mc.simple_poll != NULL){
972
avahi_simple_poll_quit(mc.simple_poll);
973
}
974
errno = old_errno;
1755
975
}
1756
976
1757
977
int main(int argc, char *argv[]){
1758
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1759
.priority = "SECURE256:!CTYPE-X.509:"
1760
"+CTYPE-OPENPGP", .current_server = NULL,
1761
.interfaces = NULL, .interfaces_size = 0 };
1762
978
AvahiSServiceBrowser *sb = NULL;
1763
error_t ret_errno;
979
int error;
1764
980
int ret;
1765
981
intmax_t tmpmax;
1766
982
char *tmp;
1767
983
int exitcode = EXIT_SUCCESS;
1768
char *interfaces_to_take_down = NULL;
1769
size_t interfaces_to_take_down_size = 0;
984
const char *interface = "eth0";
985
struct ifreq network;
986
int sd = -1;
987
bool take_down_interface = false;
988
uid_t uid;
989
gid_t gid;
990
char *connect_to = NULL;
1770
991
char tempdir[] = "/tmp/mandosXXXXXX";
1771
992
bool tempdir_created = false;
1772
993
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1773
994
const char *seckey = PATHDIR "/" SECKEY;
1774
995
const char *pubkey = PATHDIR "/" PUBKEY;
1775
char *interfaces_hooks = NULL;
1776
size_t interfaces_hooks_size = 0;
1777
996
1778
997
bool gnutls_initialized = false;
1779
998
bool gpgme_initialized = false;
1780
999
float delay = 2.5f;
1781
double retry_interval = 10; /* 10s between trying a server and
1782
retrying the same server again */
1783
1000
1784
1001
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1785
1002
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1791
1008
errno = 0;
1792
1009
ret = setgid(gid);
1793
1010
if(ret == -1){
1794
perror_plus("setgid");
1011
perror("setgid");
1795
1012
}
1796
1013
1797
1014
/* Lower user privileges (temporarily) */
1798
1015
errno = 0;
1799
1016
ret = seteuid(uid);
1800
1017
if(ret == -1){
1801
perror_plus("seteuid");
1018
perror("seteuid");
1802
1019
}
1803
1020
1804
1021
if(quit_now){
1839
1056
.arg = "SECONDS",
1840
1057
.doc = "Maximum delay to wait for interface startup",
1841
1058
.group = 2 },
1842
{ .name = "retry", .key = 132,
1843
.arg = "SECONDS",
1844
.doc = "Retry interval used when denied by the Mandos server",
1845
.group = 2 },
1846
{ .name = "network-hook-dir", .key = 133,
1847
.arg = "DIR",
1848
.doc = "Directory where network hooks are located",
1849
.group = 2 },
1850
/*
1851
* These reproduce what we would get without ARGP_NO_HELP
1852
*/
1853
{ .name = "help", .key = '?',
1854
.doc = "Give this help list", .group = -1 },
1855
{ .name = "usage", .key = -3,
1856
.doc = "Give a short usage message", .group = -1 },
1857
{ .name = "version", .key = 'V',
1858
.doc = "Print program version", .group = -1 },
1859
1059
{ .name = NULL }
1860
1060
};
1861
1061
1862
1062
error_t parse_opt(int key, char *arg,
1863
1063
struct argp_state *state){
1864
errno = 0;
1865
1064
switch(key){
1866
1065
case 128: /* --debug */
1867
1066
debug = true;
1870
1069
connect_to = arg;
1871
1070
break;
1872
1071
case 'i': /* --interface */
1873
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1874
arg, (int)',');
1875
if(ret_errno != 0){
1876
argp_error(state, "%s", strerror(ret_errno));
1877
}
1072
interface = arg;
1878
1073
break;
1879
1074
case 's': /* --seckey */
1880
1075
seckey = arg;
1887
1082
tmpmax = strtoimax(arg, &tmp, 10);
1888
1083
if(errno != 0 or tmp == arg or *tmp != '\0'
1889
1084
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1890
argp_error(state, "Bad number of DH bits");
1085
fprintf(stderr, "Bad number of DH bits\n");
1086
exit(EXIT_FAILURE);
1891
1087
}
1892
1088
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1893
1089
break;
1898
1094
errno = 0;
1899
1095
delay = strtof(arg, &tmp);
1900
1096
if(errno != 0 or tmp == arg or *tmp != '\0'){
1901
argp_error(state, "Bad delay");
1902
}
1903
case 132: /* --retry */
1904
errno = 0;
1905
retry_interval = strtod(arg, &tmp);
1906
if(errno != 0 or tmp == arg or *tmp != '\0'
1907
or (retry_interval * 1000) > INT_MAX
1908
or retry_interval < 0){
1909
argp_error(state, "Bad retry interval");
1910
}
1911
break;
1912
case 133: /* --network-hook-dir */
1913
hookdir = arg;
1914
break;
1915
/*
1916
* These reproduce what we would get without ARGP_NO_HELP
1917
*/
1918
case '?': /* --help */
1919
argp_state_help(state, state->out_stream,
1920
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1921
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1922
case -3: /* --usage */
1923
argp_state_help(state, state->out_stream,
1924
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1925
case 'V': /* --version */
1926
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1927
exit(argp_err_exit_status);
1097
fprintf(stderr, "Bad delay\n");
1098
exit(EXIT_FAILURE);
1099
}
1100
break;
1101
case ARGP_KEY_ARG:
1102
argp_usage(state);
1103
case ARGP_KEY_END:
1928
1104
break;
1929
1105
default:
1930
1106
return ARGP_ERR_UNKNOWN;
1931
1107
}
1932
return errno;
1108
return 0;
1933
1109
}
1934
1110
1935
1111
struct argp argp = { .options = options, .parser = parse_opt,
1936
1112
.args_doc = "",
1937
1113
.doc = "Mandos client -- Get and decrypt"
1938
1114
" passwords from a Mandos server" };
1939
ret = argp_parse(&argp, argc, argv,
1940
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1941
switch(ret){
1942
case 0:
1943
break;
1944
case ENOMEM:
1945
default:
1946
errno = ret;
1947
perror_plus("argp_parse");
1948
exitcode = EX_OSERR;
1949
goto end;
1950
case EINVAL:
1951
exitcode = EX_USAGE;
1952
goto end;
1953
}
1954
}
1955
1956
{
1957
/* Work around Debian bug #633582:
1958
<http://bugs.debian.org/633582> */
1959
1960
/* Re-raise priviliges */
1961
if(raise_privileges() == 0){
1962
struct stat st;
1963
1964
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1965
int seckey_fd = open(seckey, O_RDONLY);
1966
if(seckey_fd == -1){
1967
perror_plus("open");
1968
} else {
1969
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1970
if(ret == -1){
1971
perror_plus("fstat");
1972
} else {
1973
if(S_ISREG(st.st_mode)
1974
and st.st_uid == 0 and st.st_gid == 0){
1975
ret = fchown(seckey_fd, uid, gid);
1976
if(ret == -1){
1977
perror_plus("fchown");
1978
}
1979
}
1980
}
1981
TEMP_FAILURE_RETRY(close(seckey_fd));
1982
}
1983
}
1984
1985
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1986
int pubkey_fd = open(pubkey, O_RDONLY);
1987
if(pubkey_fd == -1){
1988
perror_plus("open");
1989
} else {
1990
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1991
if(ret == -1){
1992
perror_plus("fstat");
1993
} else {
1994
if(S_ISREG(st.st_mode)
1995
and st.st_uid == 0 and st.st_gid == 0){
1996
ret = fchown(pubkey_fd, uid, gid);
1997
if(ret == -1){
1998
perror_plus("fchown");
1999
}
2000
}
2001
}
2002
TEMP_FAILURE_RETRY(close(pubkey_fd));
2003
}
2004
}
2005
2006
/* Lower privileges */
2007
errno = 0;
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
2011
}
2012
}
2013
}
2014
2015
/* Remove empty interface names */
2016
{
2017
char *interface = NULL;
2018
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2019
interface))){
2020
if(if_nametoindex(interface) == 0){
2021
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2022
fprintf_plus(stderr, "Not using nonexisting interface"
2023
" \"%s\"\n", interface);
2024
}
2025
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2026
interface = NULL;
2027
}
2028
}
2029
}
2030
2031
/* Run network hooks */
2032
{
2033
2034
if(mc.interfaces != NULL){
2035
interfaces_hooks = malloc(mc.interfaces_size);
2036
if(interfaces_hooks == NULL){
2037
perror_plus("malloc");
2038
goto end;
2039
}
2040
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2041
interfaces_hooks_size = mc.interfaces_size;
2042
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2043
(int)',');
2044
}
2045
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2046
interfaces_hooks : "", delay)){
1115
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1116
if(ret == ARGP_ERR_UNKNOWN){
1117
fprintf(stderr, "Unknown error while parsing arguments\n");
1118
exitcode = EXIT_FAILURE;
2047
1119
goto end;
2048
1120
}
2049
1121
}
2056
1128
from the signal handler */
2057
1129
/* Initialize the pseudo-RNG for Avahi */
2058
1130
srand((unsigned int) time(NULL));
2059
simple_poll = avahi_simple_poll_new();
2060
if(simple_poll == NULL){
2061
fprintf_plus(stderr,
2062
"Avahi: Failed to create simple poll object.\n");
2063
exitcode = EX_UNAVAILABLE;
1131
mc.simple_poll = avahi_simple_poll_new();
1132
if(mc.simple_poll == NULL){
1133
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1134
exitcode = EXIT_FAILURE;
2064
1135
goto end;
2065
1136
}
2066
1137
2067
1138
sigemptyset(&sigterm_action.sa_mask);
2068
1139
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2069
1140
if(ret == -1){
2070
perror_plus("sigaddset");
2071
exitcode = EX_OSERR;
1141
perror("sigaddset");
1142
exitcode = EXIT_FAILURE;
2072
1143
goto end;
2073
1144
}
2074
1145
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2075
1146
if(ret == -1){
2076
perror_plus("sigaddset");
2077
exitcode = EX_OSERR;
1147
perror("sigaddset");
1148
exitcode = EXIT_FAILURE;
2078
1149
goto end;
2079
1150
}
2080
1151
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2081
1152
if(ret == -1){
2082
perror_plus("sigaddset");
2083
exitcode = EX_OSERR;
1153
perror("sigaddset");
1154
exitcode = EXIT_FAILURE;
2084
1155
goto end;
2085
1156
}
2086
1157
/* Need to check if the handler is SIG_IGN before handling:
2089
1160
*/
2090
1161
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2091
1162
if(ret == -1){
2092
perror_plus("sigaction");
2093
return EX_OSERR;
1163
perror("sigaction");
1164
return EXIT_FAILURE;
2094
1165
}
2095
1166
if(old_sigterm_action.sa_handler != SIG_IGN){
2096
1167
ret = sigaction(SIGINT, &sigterm_action, NULL);
2097
1168
if(ret == -1){
2098
perror_plus("sigaction");
2099
exitcode = EX_OSERR;
1169
perror("sigaction");
1170
exitcode = EXIT_FAILURE;
2100
1171
goto end;
2101
1172
}
2102
1173
}
2103
1174
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2104
1175
if(ret == -1){
2105
perror_plus("sigaction");
2106
return EX_OSERR;
1176
perror("sigaction");
1177
return EXIT_FAILURE;
2107
1178
}
2108
1179
if(old_sigterm_action.sa_handler != SIG_IGN){
2109
1180
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2110
1181
if(ret == -1){
2111
perror_plus("sigaction");
2112
exitcode = EX_OSERR;
1182
perror("sigaction");
1183
exitcode = EXIT_FAILURE;
2113
1184
goto end;
2114
1185
}
2115
1186
}
2116
1187
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2117
1188
if(ret == -1){
2118
perror_plus("sigaction");
2119
return EX_OSERR;
1189
perror("sigaction");
1190
return EXIT_FAILURE;
2120
1191
}
2121
1192
if(old_sigterm_action.sa_handler != SIG_IGN){
2122
1193
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2123
1194
if(ret == -1){
2124
perror_plus("sigaction");
2125
exitcode = EX_OSERR;
1195
perror("sigaction");
1196
exitcode = EXIT_FAILURE;
2126
1197
goto end;
2127
1198
}
2128
1199
}
2129
1200
2130
/* If no interfaces were specified, make a list */
2131
if(mc.interfaces == NULL){
2132
struct dirent **direntries;
2133
/* Look for any good interfaces */
2134
ret = scandir(sys_class_net, &direntries, good_interface,
2135
alphasort);
2136
if(ret >= 1){
2137
/* Add all found interfaces to interfaces list */
2138
for(int i = 0; i < ret; ++i){
2139
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2140
direntries[i]->d_name);
2141
if(ret_errno != 0){
2142
perror_plus("argz_add");
2143
continue;
2144
}
2145
if(debug){
2146
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2147
direntries[i]->d_name);
2148
}
2149
}
2150
free(direntries);
1201
/* If the interface is down, bring it up */
1202
if(interface[0] != '\0'){
1203
if_index = (AvahiIfIndex) if_nametoindex(interface);
1204
if(if_index == 0){
1205
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1206
exitcode = EXIT_FAILURE;
1207
goto end;
1208
}
1209
1210
if(quit_now){
1211
goto end;
1212
}
1213
1214
/* Re-raise priviliges */
1215
errno = 0;
1216
ret = seteuid(0);
1217
if(ret == -1){
1218
perror("seteuid");
1219
}
1220
1221
#ifdef __linux__
1222
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1223
messages to mess up the prompt */
1224
ret = klogctl(8, NULL, 5);
1225
bool restore_loglevel = true;
1226
if(ret == -1){
1227
restore_loglevel = false;
1228
perror("klogctl");
1229
}
1230
#endif /* __linux__ */
1231
1232
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1233
if(sd < 0){
1234
perror("socket");
1235
exitcode = EXIT_FAILURE;
1236
#ifdef __linux__
1237
if(restore_loglevel){
1238
ret = klogctl(7, NULL, 0);
1239
if(ret == -1){
1240
perror("klogctl");
1241
}
1242
}
1243
#endif /* __linux__ */
1244
/* Lower privileges */
1245
errno = 0;
1246
ret = seteuid(uid);
1247
if(ret == -1){
1248
perror("seteuid");
1249
}
1250
goto end;
1251
}
1252
strcpy(network.ifr_name, interface);
1253
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1254
if(ret == -1){
1255
perror("ioctl SIOCGIFFLAGS");
1256
#ifdef __linux__
1257
if(restore_loglevel){
1258
ret = klogctl(7, NULL, 0);
1259
if(ret == -1){
1260
perror("klogctl");
1261
}
1262
}
1263
#endif /* __linux__ */
1264
exitcode = EXIT_FAILURE;
1265
/* Lower privileges */
1266
errno = 0;
1267
ret = seteuid(uid);
1268
if(ret == -1){
1269
perror("seteuid");
1270
}
1271
goto end;
1272
}
1273
if((network.ifr_flags & IFF_UP) == 0){
1274
network.ifr_flags |= IFF_UP;
1275
take_down_interface = true;
1276
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1277
if(ret == -1){
1278
take_down_interface = false;
1279
perror("ioctl SIOCSIFFLAGS");
1280
exitcode = EXIT_FAILURE;
1281
#ifdef __linux__
1282
if(restore_loglevel){
1283
ret = klogctl(7, NULL, 0);
1284
if(ret == -1){
1285
perror("klogctl");
1286
}
1287
}
1288
#endif /* __linux__ */
1289
/* Lower privileges */
1290
errno = 0;
1291
ret = seteuid(uid);
1292
if(ret == -1){
1293
perror("seteuid");
1294
}
1295
goto end;
1296
}
1297
}
1298
/* sleep checking until interface is running */
1299
for(int i=0; i < delay * 4; i++){
1300
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1301
if(ret == -1){
1302
perror("ioctl SIOCGIFFLAGS");
1303
} else if(network.ifr_flags & IFF_RUNNING){
1304
break;
1305
}
1306
struct timespec sleeptime = { .tv_nsec = 250000000 };
1307
ret = nanosleep(&sleeptime, NULL);
1308
if(ret == -1 and errno != EINTR){
1309
perror("nanosleep");
1310
}
1311
}
1312
if(not take_down_interface){
1313
/* We won't need the socket anymore */
1314
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1315
if(ret == -1){
1316
perror("close");
1317
}
1318
}
1319
#ifdef __linux__
1320
if(restore_loglevel){
1321
/* Restores kernel loglevel to default */
1322
ret = klogctl(7, NULL, 0);
1323
if(ret == -1){
1324
perror("klogctl");
1325
}
1326
}
1327
#endif /* __linux__ */
1328
/* Lower privileges */
1329
errno = 0;
1330
if(take_down_interface){
1331
/* Lower privileges */
1332
ret = seteuid(uid);
1333
if(ret == -1){
1334
perror("seteuid");
1335
}
2151
1336
} else {
2152
free(direntries);
2153
fprintf_plus(stderr, "Could not find a network interface\n");
2154
exitcode = EXIT_FAILURE;
2155
goto end;
2156
}
2157
}
2158
2159
/* If we only got one interface, explicitly use only that one */
2160
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2161
if(debug){
2162
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2163
mc.interfaces);
2164
}
2165
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2166
}
2167
2168
/* Bring up interfaces which are down */
2169
if(not (argz_count(mc.interfaces, mc.interfaces_size) == 1
2170
and strcmp(mc.interfaces, "none") == 0)){
2171
char *interface = NULL;
2172
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2173
interface))){
2174
bool interface_was_up = interface_is_up(interface);
2175
ret = bring_up_interface(interface, delay);
2176
if(not interface_was_up){
2177
if(ret != 0){
2178
errno = ret;
2179
perror_plus("Failed to bring up interface");
2180
} else {
2181
ret_errno = argz_add(&interfaces_to_take_down,
2182
&interfaces_to_take_down_size,
2183
interface);
2184
}
1337
/* Lower privileges permanently */
1338
ret = setuid(uid);
1339
if(ret == -1){
1340
perror("setuid");
2185
1341
}
2186
1342
}
2187
free(mc.interfaces);
2188
mc.interfaces = NULL;
2189
mc.interfaces_size = 0;
2190
if(debug and (interfaces_to_take_down == NULL)){
2191
fprintf_plus(stderr, "No interfaces were brought up\n");
2192
}
2193
1343
}
2194
1344
2195
1345
if(quit_now){
2196
1346
goto end;
2197
1347
}
2198
1348
2199
ret = init_gnutls_global(pubkey, seckey, &mc);
1349
ret = init_gnutls_global(pubkey, seckey);
2200
1350
if(ret == -1){
2201
fprintf_plus(stderr, "init_gnutls_global failed\n");
2202
exitcode = EX_UNAVAILABLE;
1351
fprintf(stderr, "init_gnutls_global failed\n");
1352
exitcode = EXIT_FAILURE;
2203
1353
goto end;
2204
1354
} else {
2205
1355
gnutls_initialized = true;
2209
1359
goto end;
2210
1360
}
2211
1361
1362
tempdir_created = true;
2212
1363
if(mkdtemp(tempdir) == NULL){
2213
perror_plus("mkdtemp");
1364
tempdir_created = false;
1365
perror("mkdtemp");
2214
1366
goto end;
2215
1367
}
2216
tempdir_created = true;
2217
1368
2218
1369
if(quit_now){
2219
1370
goto end;
2220
1371
}
2221
1372
2222
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2223
fprintf_plus(stderr, "init_gpgme failed\n");
2224
exitcode = EX_UNAVAILABLE;
1373
if(not init_gpgme(pubkey, seckey, tempdir)){
1374
fprintf(stderr, "init_gpgme failed\n");
1375
exitcode = EXIT_FAILURE;
2225
1376
goto end;
2226
1377
} else {
2227
1378
gpgme_initialized = true;
2235
1386
/* Connect directly, do not use Zeroconf */
2236
1387
/* (Mainly meant for debugging) */
2237
1388
char *address = strrchr(connect_to, ':');
2238
2239
1389
if(address == NULL){
2240
fprintf_plus(stderr, "No colon in address\n");
2241
exitcode = EX_USAGE;
1390
fprintf(stderr, "No colon in address\n");
1391
exitcode = EXIT_FAILURE;
2242
1392
goto end;
2243
1393
}
2244
1394
2246
1396
goto end;
2247
1397
}
2248
1398
2249
in_port_t port;
1399
uint16_t port;
2250
1400
errno = 0;
2251
1401
tmpmax = strtoimax(address+1, &tmp, 10);
2252
1402
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2253
or tmpmax != (in_port_t)tmpmax){
2254
fprintf_plus(stderr, "Bad port number\n");
2255
exitcode = EX_USAGE;
1403
or tmpmax != (uint16_t)tmpmax){
1404
fprintf(stderr, "Bad port number\n");
1405
exitcode = EXIT_FAILURE;
2256
1406
goto end;
2257
1407
}
2258
1408
2260
1410
goto end;
2261
1411
}
2262
1412
2263
port = (in_port_t)tmpmax;
1413
port = (uint16_t)tmpmax;
2264
1414
*address = '\0';
1415
address = connect_to;
2265
1416
/* Colon in address indicates IPv6 */
2266
1417
int af;
2267
if(strchr(connect_to, ':') != NULL){
1418
if(strchr(address, ':') != NULL){
2268
1419
af = AF_INET6;
2269
/* Accept [] around IPv6 address - see RFC 5952 */
2270
if(connect_to[0] == '[' and address[-1] == ']')
2271
{
2272
connect_to++;
2273
address[-1] = '\0';
2274
}
2275
1420
} else {
2276
1421
af = AF_INET;
2277
1422
}
2278
address = connect_to;
2279
1423
2280
1424
if(quit_now){
2281
1425
goto end;
2282
1426
}
2283
1427
2284
while(not quit_now){
2285
ret = start_mandos_communication(address, port, if_index, af,
2286
&mc);
2287
if(quit_now or ret == 0){
2288
break;
2289
}
2290
if(debug){
2291
fprintf_plus(stderr, "Retrying in %d seconds\n",
2292
(int)retry_interval);
2293
}
2294
sleep((int)retry_interval);
2295
}
2296
2297
if (not quit_now){
1428
ret = start_mandos_communication(address, port, if_index, af);
1429
if(ret < 0){
1430
exitcode = EXIT_FAILURE;
1431
} else {
2298
1432
exitcode = EXIT_SUCCESS;
2299
1433
}
2300
2301
1434
goto end;
2302
1435
}
2303
1436
2315
1448
config.publish_domain = 0;
2316
1449
2317
1450
/* Allocate a new server */
2318
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2319
&config, NULL, NULL, &ret_errno);
1451
mc.server = avahi_server_new(avahi_simple_poll_get
1452
(mc.simple_poll), &config, NULL,
1453
NULL, &error);
2320
1454
2321
1455
/* Free the Avahi configuration data */
2322
1456
avahi_server_config_free(&config);
2324
1458
2325
1459
/* Check if creating the Avahi server object succeeded */
2326
1460
if(mc.server == NULL){
2327
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2328
avahi_strerror(ret_errno));
2329
exitcode = EX_UNAVAILABLE;
1461
fprintf(stderr, "Failed to create Avahi server: %s\n",
1462
avahi_strerror(error));
1463
exitcode = EXIT_FAILURE;
2330
1464
goto end;
2331
1465
}
2332
1466
2337
1471
/* Create the Avahi service browser */
2338
1472
sb = avahi_s_service_browser_new(mc.server, if_index,
2339
1473
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2340
NULL, 0, browse_callback,
2341
(void *)&mc);
1474
NULL, 0, browse_callback, NULL);
2342
1475
if(sb == NULL){
2343
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2344
avahi_strerror(avahi_server_errno(mc.server)));
2345
exitcode = EX_UNAVAILABLE;
1476
fprintf(stderr, "Failed to create service browser: %s\n",
1477
avahi_strerror(avahi_server_errno(mc.server)));
1478
exitcode = EXIT_FAILURE;
2346
1479
goto end;
2347
1480
}
2348
1481
2353
1486
/* Run the main loop */
2354
1487
2355
1488
if(debug){
2356
fprintf_plus(stderr, "Starting Avahi loop search\n");
2357
}
2358
2359
ret = avahi_loop_with_timeout(simple_poll,
2360
(int)(retry_interval * 1000), &mc);
2361
if(debug){
2362
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2363
(ret == 0) ? "successfully" : "with error");
2364
}
1489
fprintf(stderr, "Starting Avahi loop search\n");
1490
}
1491
1492
avahi_simple_poll_loop(mc.simple_poll);
2365
1493
2366
1494
end:
2367
1495
2368
1496
if(debug){
2369
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1497
fprintf(stderr, "%s exiting\n", argv[0]);
2370
1498
}
2371
1499
2372
1500
/* Cleanup things */
2376
1504
if(mc.server != NULL)
2377
1505
avahi_server_free(mc.server);
2378
1506
2379
if(simple_poll != NULL)
2380
avahi_simple_poll_free(simple_poll);
1507
if(mc.simple_poll != NULL)
1508
avahi_simple_poll_free(mc.simple_poll);
2381
1509
2382
1510
if(gnutls_initialized){
2383
1511
gnutls_certificate_free_credentials(mc.cred);
2389
1517
gpgme_release(mc.ctx);
2390
1518
}
2391
1519
2392
/* Cleans up the circular linked list of Mandos servers the client
2393
has seen */
2394
if(mc.current_server != NULL){
2395
mc.current_server->prev->next = NULL;
2396
while(mc.current_server != NULL){
2397
server *next = mc.current_server->next;
2398
free(mc.current_server);
2399
mc.current_server = next;
1520
/* Take down the network interface */
1521
if(take_down_interface){
1522
/* Re-raise priviliges */
1523
errno = 0;
1524
ret = seteuid(0);
1525
if(ret == -1){
1526
perror("seteuid");
2400
1527
}
2401
}
2402
2403
/* Re-raise priviliges */
2404
{
2405
raise_privileges();
2406
2407
/* Run network hooks */
2408
run_network_hooks("stop", interfaces_hooks != NULL ?
2409
interfaces_hooks : "", delay);
2410
2411
/* Take down the network interfaces which were brought up */
2412
{
2413
char *interface = NULL;
2414
while((interface=argz_next(interfaces_to_take_down,
2415
interfaces_to_take_down_size,
2416
interface))){
2417
ret_errno = take_down_interface(interface);
2418
if(ret_errno != 0){
2419
errno = ret_errno;
2420
perror_plus("Failed to take down interface");
1528
if(geteuid() == 0){
1529
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1530
if(ret == -1){
1531
perror("ioctl SIOCGIFFLAGS");
1532
} else if(network.ifr_flags & IFF_UP) {
1533
network.ifr_flags &= ~IFF_UP; /* clear flag */
1534
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1535
if(ret == -1){
1536
perror("ioctl SIOCSIFFLAGS");
2421
1537
}
2422
1538
}
2423
if(debug and (interfaces_to_take_down == NULL)){
2424
fprintf_plus(stderr, "No interfaces needed to be taken"
2425
" down\n");
1539
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1540
if(ret == -1){
1541
perror("close");
1542
}
1543
/* Lower privileges permanently */
1544
errno = 0;
1545
ret = setuid(uid);
1546
if(ret == -1){
1547
perror("setuid");
2426
1548
}
2427
1549
}
2428
2429
lower_privileges_permanently();
2430
1550
}
2431
1551
2432
free(interfaces_to_take_down);
2433
free(interfaces_hooks);
2434
2435
/* Removes the GPGME temp directory and all files inside */
1552
/* Removes the temp directory used by GPGME */
2436
1553
if(tempdir_created){
2437
struct dirent **direntries = NULL;
2438
struct dirent *direntry = NULL;
2439
int numentries = scandir(tempdir, &direntries, notdotentries,
2440
alphasort);
2441
if (numentries > 0){
2442
for(int i = 0; i < numentries; i++){
2443
direntry = direntries[i];
1554
DIR *d;
1555
struct dirent *direntry;
1556
d = opendir(tempdir);
1557
if(d == NULL){
1558
if(errno != ENOENT){
1559
perror("opendir");
1560
}
1561
} else {
1562
while(true){
1563
direntry = readdir(d);
1564
if(direntry == NULL){
1565
break;
1566
}
1567
/* Skip "." and ".." */
1568
if(direntry->d_name[0] == '.'
1569
and (direntry->d_name[1] == '\0'
1570
or (direntry->d_name[1] == '.'
1571
and direntry->d_name[2] == '\0'))){
1572
continue;
1573
}
2444
1574
char *fullname = NULL;
2445
1575
ret = asprintf(&fullname, "%s/%s", tempdir,
2446
1576
direntry->d_name);
2447
1577
if(ret < 0){
2448
perror_plus("asprintf");
1578
perror("asprintf");
2449
1579
continue;
2450
1580
}
2451
1581
ret = remove(fullname);
2452
1582
if(ret == -1){
2453
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2454
strerror(errno));
1583
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1584
strerror(errno));
2455
1585
}
2456
1586
free(fullname);
2457
1587
}
2458
}
2459
2460
/* need to clean even if 0 because man page doesn't specify */
2461
free(direntries);
2462
if (numentries == -1){
2463
perror_plus("scandir");
1588
closedir(d);
2464
1589
}
2465
1590
ret = rmdir(tempdir);
2466
1591
if(ret == -1 and errno != ENOENT){
2467
perror_plus("rmdir");
1592
perror("rmdir");
2468
1593
}
2469
1594
}
2470
1595
2475
1600
&old_sigterm_action,
2476
1601
NULL));
2477
1602
if(ret == -1){
2478
perror_plus("sigaction");
1603
perror("sigaction");
2479
1604
}
2480
1605
do {
2481
1606
ret = raise(signal_received);
2482
1607
} while(ret != 0 and errno == EINTR);
2483
1608
if(ret != 0){
2484
perror_plus("raise");
1609
perror("raise");
2485
1610
abort();
2486
1611
}
2487
1612
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0