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237.2.186
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:00:40 UTC
- mto: (24.1.164 mandos) (237.12.2 mandos-persistent) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100912030040-b0uopyennste9fdh
Documentation changes:
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
* DBUS-API: New file documenting the server D-Bus interface.
* clients.conf: Add examples of new approval settings.
* debian/mandos.docs: Added "DBUS-API".
* mandos-clients.conf.xml (OPTIONS): Added "approved_by_default",
"approval_delay", and
"approval_duration".
* mandos.xml (D-BUS INTERFACE): Refer to the "DBUS-API" file.
(BUGS): Remove mention of lack of a remote query interface.
- files removed:
- 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 © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
70
69
if_nametoindex(), IF_NAMESIZE */
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
85
84
raise() */
86
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
87
92
88
#ifdef __linux__
93
89
#include <sys/klog.h> /* klogctl() */
111
107
init_gnutls_session(),
112
108
GNUTLS_* */
113
109
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
116
112
117
113
/* GPGME */
118
114
#include <gpgme.h> /* All GPGME types, constants and
126
122
#define PATHDIR "/conf/conf.d/mandos"
127
123
#define SECKEY "seckey.txt"
128
124
#define PUBKEY "pubkey.txt"
129
#define HOOKDIR "/lib/mandos/network-hooks.d"
130
125
131
126
bool debug = false;
132
127
static const char mandos_protocol_version[] = "1";
133
128
const char *argp_program_version = "mandos-client " VERSION;
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
135
130
static const char sys_class_net[] = "/sys/class/net";
136
131
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;
149
132
150
133
/* Used for passing in values through the Avahi callback functions */
151
134
typedef struct {
156
139
gnutls_dh_params_t dh_params;
157
140
const char *priority;
158
141
gpgme_ctx_t ctx;
159
server *current_server;
160
142
} mandos_context;
161
143
162
144
/* global context so signal handler can reach it*/
163
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
164
146
.dh_bits = 1024, .priority = "SECURE256"
165
":!CTYPE-X.509:+CTYPE-OPENPGP",
166
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
167
148
168
149
sig_atomic_t quit_now = 0;
169
150
int signal_received = 0;
170
151
171
/* Function to use when printing errors */
172
void perror_plus(const char *print_text){
173
fprintf(stderr, "Mandos plugin %s: ",
174
program_invocation_short_name);
175
perror(print_text);
176
}
177
178
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_list ap;
180
va_start (ap, format);
181
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
185
}
186
187
152
/*
188
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
189
154
* bytes. "buffer_capacity" is how much is currently allocated,
190
155
* "buffer_length" is how much is already used.
191
156
*/
192
157
size_t incbuffer(char **buffer, size_t buffer_length,
193
size_t buffer_capacity){
158
size_t buffer_capacity){
194
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
195
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
196
161
if(buffer == NULL){
201
166
return buffer_capacity;
202
167
}
203
168
204
/* Add server to set of servers to retry periodically */
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
207
int ret;
208
server *new_server = malloc(sizeof(server));
209
if(new_server == NULL){
210
perror_plus("malloc");
211
return -1;
212
}
213
*new_server = (server){ .ip = strdup(ip),
214
.port = port,
215
.if_index = if_index,
216
.af = af };
217
if(new_server->ip == NULL){
218
perror_plus("strdup");
219
return -1;
220
}
221
/* Special case of first server */
222
if (mc.current_server == NULL){
223
new_server->next = new_server;
224
new_server->prev = new_server;
225
mc.current_server = new_server;
226
/* Place the new server last in the list */
227
} else {
228
new_server->next = mc.current_server;
229
new_server->prev = mc.current_server->prev;
230
new_server->prev->next = new_server;
231
mc.current_server->prev = new_server;
232
}
233
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
234
if(ret == -1){
235
perror_plus("clock_gettime");
236
return -1;
237
}
238
return 0;
239
}
240
241
169
/*
242
170
* Initialize GPGME.
243
171
*/
244
static bool init_gpgme(const char *seckey, const char *pubkey,
245
const char *tempdir){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
246
174
gpgme_error_t rc;
247
175
gpgme_engine_info_t engine_info;
248
176
257
185
258
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
259
187
if(fd == -1){
260
perror_plus("open");
188
perror("open");
261
189
return false;
262
190
}
263
191
264
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
265
193
if(rc != GPG_ERR_NO_ERROR){
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
194
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
268
196
return false;
269
197
}
270
198
271
199
rc = gpgme_op_import(mc.ctx, pgp_data);
272
200
if(rc != GPG_ERR_NO_ERROR){
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
275
203
return false;
276
204
}
277
205
278
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
279
207
if(ret == -1){
280
perror_plus("close");
208
perror("close");
281
209
}
282
210
gpgme_data_release(pgp_data);
283
211
return true;
284
212
}
285
213
286
214
if(debug){
287
fprintf_plus(stderr, "Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
288
216
}
289
217
290
218
/* Init GPGME */
291
219
gpgme_check_version(NULL);
292
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
293
221
if(rc != GPG_ERR_NO_ERROR){
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
296
224
return false;
297
225
}
298
226
299
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
300
228
rc = gpgme_get_engine_info(&engine_info);
301
229
if(rc != GPG_ERR_NO_ERROR){
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
304
232
return false;
305
233
}
306
234
while(engine_info != NULL){
312
240
engine_info = engine_info->next;
313
241
}
314
242
if(engine_info == NULL){
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
317
244
return false;
318
245
}
319
246
320
247
/* Create new GPGME "context" */
321
248
rc = gpgme_new(&(mc.ctx));
322
249
if(rc != GPG_ERR_NO_ERROR){
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
326
252
return false;
327
253
}
328
254
347
273
ssize_t plaintext_length = 0;
348
274
349
275
if(debug){
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
351
277
}
352
278
353
279
/* Create new GPGME data buffer from memory cryptotext */
354
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
355
281
0);
356
282
if(rc != GPG_ERR_NO_ERROR){
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
359
285
return -1;
360
286
}
361
287
362
288
/* Create new empty GPGME data buffer for the plaintext */
363
289
rc = gpgme_data_new(&dh_plain);
364
290
if(rc != GPG_ERR_NO_ERROR){
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
368
293
gpgme_data_release(dh_crypto);
369
294
return -1;
370
295
}
373
298
data buffer */
374
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
375
300
if(rc != GPG_ERR_NO_ERROR){
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
378
303
plaintext_length = -1;
379
304
if(debug){
380
305
gpgme_decrypt_result_t result;
381
306
result = gpgme_op_decrypt_result(mc.ctx);
382
307
if(result == NULL){
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
309
} else {
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
310
fprintf(stderr, "Unsupported algorithm: %s\n",
311
result->unsupported_algorithm);
312
fprintf(stderr, "Wrong key usage: %u\n",
313
result->wrong_key_usage);
389
314
if(result->file_name != NULL){
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
391
316
}
392
317
gpgme_recipient_t recipient;
393
318
recipient = result->recipients;
394
319
while(recipient != NULL){
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
401
? "No" : "Yes");
320
fprintf(stderr, "Public key algorithm: %s\n",
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
324
recipient->status == GPG_ERR_NO_SECKEY
325
? "No" : "Yes");
402
326
recipient = recipient->next;
403
327
}
404
328
}
407
331
}
408
332
409
333
if(debug){
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
411
335
}
412
336
413
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
414
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
415
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
416
340
plaintext_length = -1;
417
341
goto decrypt_end;
418
342
}
420
344
*plaintext = NULL;
421
345
while(true){
422
346
plaintext_capacity = incbuffer(plaintext,
423
(size_t)plaintext_length,
424
plaintext_capacity);
347
(size_t)plaintext_length,
348
plaintext_capacity);
425
349
if(plaintext_capacity == 0){
426
perror_plus("incbuffer");
427
plaintext_length = -1;
428
goto decrypt_end;
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
429
353
}
430
354
431
355
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
436
360
break;
437
361
}
438
362
if(ret < 0){
439
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
440
364
plaintext_length = -1;
441
365
goto decrypt_end;
442
366
}
444
368
}
445
369
446
370
if(debug){
447
fprintf_plus(stderr, "Decrypted password is: ");
371
fprintf(stderr, "Decrypted password is: ");
448
372
for(ssize_t i = 0; i < plaintext_length; i++){
449
373
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
450
374
}
472
396
/* GnuTLS log function callback */
473
397
static void debuggnutls(__attribute__((unused)) int level,
474
398
const char* string){
475
fprintf_plus(stderr, "GnuTLS: %s", string);
399
fprintf(stderr, "GnuTLS: %s", string);
476
400
}
477
401
478
402
static int init_gnutls_global(const char *pubkeyfilename,
480
404
int ret;
481
405
482
406
if(debug){
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
407
fprintf(stderr, "Initializing GnuTLS\n");
484
408
}
485
409
486
410
ret = gnutls_global_init();
487
411
if(ret != GNUTLS_E_SUCCESS){
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
490
414
return -1;
491
415
}
492
416
499
423
}
500
424
501
425
/* OpenPGP credentials */
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
503
427
if(ret != GNUTLS_E_SUCCESS){
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
432
safer_gnutls_strerror(ret));
506
433
gnutls_global_deinit();
507
434
return -1;
508
435
}
509
436
510
437
if(debug){
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
440
seckeyfilename);
515
441
}
516
442
517
443
ret = gnutls_certificate_set_openpgp_key_file
518
444
(mc.cred, pubkeyfilename, seckeyfilename,
519
445
GNUTLS_OPENPGP_FMT_BASE64);
520
446
if(ret != GNUTLS_E_SUCCESS){
521
fprintf_plus(stderr,
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
447
fprintf(stderr,
448
"Error[%d] while reading the OpenPGP key pair ('%s',"
449
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
450
fprintf(stderr, "The GnuTLS error is: %s\n",
451
safer_gnutls_strerror(ret));
526
452
goto globalfail;
527
453
}
528
454
529
455
/* GnuTLS server initialization */
530
456
ret = gnutls_dh_params_init(&mc.dh_params);
531
457
if(ret != GNUTLS_E_SUCCESS){
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
535
460
goto globalfail;
536
461
}
537
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
538
463
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
541
466
goto globalfail;
542
467
}
543
468
563
488
}
564
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
565
490
if(ret != GNUTLS_E_SUCCESS){
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
safer_gnutls_strerror(ret));
569
493
}
570
494
571
495
{
578
502
}
579
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
580
504
if(ret != GNUTLS_E_SUCCESS){
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
505
fprintf(stderr, "Syntax error at: %s\n", err);
506
fprintf(stderr, "GnuTLS error: %s\n",
507
safer_gnutls_strerror(ret));
584
508
gnutls_deinit(*session);
585
509
return -1;
586
510
}
595
519
}
596
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
597
521
if(ret != GNUTLS_E_SUCCESS){
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
safer_gnutls_strerror(ret));
600
524
gnutls_deinit(*session);
601
525
return -1;
602
526
}
647
571
pf = PF_INET;
648
572
break;
649
573
default:
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
574
fprintf(stderr, "Bad address family: %d\n", af);
651
575
errno = EINVAL;
652
576
return -1;
653
577
}
658
582
}
659
583
660
584
if(debug){
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
586
"\n", ip, port);
663
587
}
664
588
665
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
666
590
if(tcp_sd < 0){
667
591
int e = errno;
668
perror_plus("socket");
592
perror("socket");
669
593
errno = e;
670
594
goto mandos_end;
671
595
}
685
609
}
686
610
if(ret < 0 ){
687
611
int e = errno;
688
perror_plus("inet_pton");
612
perror("inet_pton");
689
613
errno = e;
690
614
goto mandos_end;
691
615
}
692
616
if(ret == 0){
693
617
int e = errno;
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
618
fprintf(stderr, "Bad address: %s\n", ip);
695
619
errno = e;
696
620
goto mandos_end;
697
621
}
702
626
703
627
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
704
628
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
705
-Wunreachable-code*/
629
-Wunreachable-code*/
706
630
if(if_index == AVAHI_IF_UNSPEC){
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
" without a network interface\n");
709
633
errno = EINVAL;
710
634
goto mandos_end;
711
635
}
727
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
728
652
char interface[IF_NAMESIZE];
729
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
730
perror_plus("if_indextoname");
654
perror("if_indextoname");
731
655
} else {
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
734
658
}
735
659
} else {
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
738
662
}
739
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
740
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
747
671
sizeof(addrstr));
748
672
}
749
673
if(pcret == NULL){
750
perror_plus("inet_ntop");
674
perror("inet_ntop");
751
675
} else {
752
676
if(strcmp(addrstr, ip) != 0){
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
754
678
}
755
679
}
756
680
}
766
690
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
767
691
}
768
692
if(ret < 0){
769
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
770
int e = errno;
771
perror_plus("connect");
772
errno = e;
773
}
693
int e = errno;
694
perror("connect");
695
errno = e;
774
696
goto mandos_end;
775
697
}
776
698
784
706
while(true){
785
707
size_t out_size = strlen(out);
786
708
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
787
out_size - written));
709
out_size - written));
788
710
if(ret == -1){
789
711
int e = errno;
790
perror_plus("write");
712
perror("write");
791
713
errno = e;
792
714
goto mandos_end;
793
715
}
810
732
}
811
733
812
734
if(debug){
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
735
fprintf(stderr, "Establishing TLS session with %s\n", ip);
814
736
}
815
737
816
738
if(quit_now){
818
740
goto mandos_end;
819
741
}
820
742
821
/* Spurious warning from -Wint-to-pointer-cast */
822
743
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
823
744
824
745
if(quit_now){
836
757
837
758
if(ret != GNUTLS_E_SUCCESS){
838
759
if(debug){
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
760
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
840
761
gnutls_perror(ret);
841
762
}
842
763
errno = EPROTO;
846
767
/* Read OpenPGP packet that contains the wanted password */
847
768
848
769
if(debug){
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
770
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
771
ip);
851
772
}
852
773
853
774
while(true){
858
779
}
859
780
860
781
buffer_capacity = incbuffer(&buffer, buffer_length,
861
buffer_capacity);
782
buffer_capacity);
862
783
if(buffer_capacity == 0){
863
784
int e = errno;
864
perror_plus("incbuffer");
785
perror("incbuffer");
865
786
errno = e;
866
787
goto mandos_end;
867
788
}
891
812
}
892
813
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
893
814
if(ret < 0){
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
815
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
896
816
gnutls_perror(ret);
897
817
errno = EPROTO;
898
818
goto mandos_end;
899
819
}
900
820
break;
901
821
default:
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
822
fprintf(stderr, "Unknown error while reading data from"
823
" encrypted session with Mandos server\n");
904
824
gnutls_bye(session, GNUTLS_SHUT_RDWR);
905
825
errno = EIO;
906
826
goto mandos_end;
911
831
}
912
832
913
833
if(debug){
914
fprintf_plus(stderr, "Closing TLS session\n");
834
fprintf(stderr, "Closing TLS session\n");
915
835
}
916
836
917
837
if(quit_now){
929
849
930
850
if(buffer_length > 0){
931
851
ssize_t decrypted_buffer_size;
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
852
decrypted_buffer_size = pgp_packet_decrypt(buffer,
853
buffer_length,
933
854
&decrypted_buffer);
934
855
if(decrypted_buffer_size >= 0){
935
856
946
867
if(ret == 0 and ferror(stdout)){
947
868
int e = errno;
948
869
if(debug){
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
870
fprintf(stderr, "Error writing encrypted data: %s\n",
871
strerror(errno));
951
872
}
952
873
errno = e;
953
874
goto mandos_end;
972
893
if(e == 0){
973
894
e = errno;
974
895
}
975
perror_plus("close");
896
perror("close");
976
897
}
977
898
gnutls_deinit(session);
978
errno = e;
979
899
if(quit_now){
980
errno = EINTR;
900
e = EINTR;
981
901
retval = -1;
982
902
}
903
errno = e;
983
904
}
984
905
return retval;
985
906
}
1010
931
switch(event){
1011
932
default:
1012
933
case AVAHI_RESOLVER_FAILURE:
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
domain,
1016
avahi_strerror(avahi_server_errno(mc.server)));
934
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
935
" of type '%s' in domain '%s': %s\n", name, type, domain,
936
avahi_strerror(avahi_server_errno(mc.server)));
1017
937
break;
1018
938
1019
939
case AVAHI_RESOLVER_FOUND:
1021
941
char ip[AVAHI_ADDRESS_STR_MAX];
1022
942
avahi_address_snprint(ip, sizeof(ip), address);
1023
943
if(debug){
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
944
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
945
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
946
ip, (intmax_t)interface, port);
1027
947
}
1028
948
int ret = start_mandos_communication(ip, port, interface,
1029
949
avahi_proto_to_af(proto));
1030
950
if(ret == 0){
1031
951
avahi_simple_poll_quit(mc.simple_poll);
1032
} else {
1033
ret = add_server(ip, port, interface,
1034
avahi_proto_to_af(proto));
1035
952
}
1036
953
}
1037
954
}
1061
978
default:
1062
979
case AVAHI_BROWSER_FAILURE:
1063
980
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
981
fprintf(stderr, "(Avahi browser) %s\n",
982
avahi_strerror(avahi_server_errno(mc.server)));
1066
983
avahi_simple_poll_quit(mc.simple_poll);
1067
984
return;
1068
985
1075
992
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1076
993
name, type, domain, protocol, 0,
1077
994
resolve_callback, NULL) == NULL)
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
995
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
996
name, avahi_strerror(avahi_server_errno(mc.server)));
1081
997
break;
1082
998
1083
999
case AVAHI_BROWSER_REMOVE:
1086
1002
case AVAHI_BROWSER_ALL_FOR_NOW:
1087
1003
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1088
1004
if(debug){
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1005
fprintf(stderr, "No Mandos server found, still searching...\n");
1091
1006
}
1092
1007
break;
1093
1008
}
1094
1009
}
1095
1010
1096
/* Signal handler that stops main loop after SIGTERM */
1011
/* stop main loop after sigterm has been called */
1097
1012
static void handle_sigterm(int sig){
1098
1013
if(quit_now){
1099
1014
return;
1101
1016
quit_now = 1;
1102
1017
signal_received = sig;
1103
1018
int old_errno = errno;
1104
/* set main loop to exit */
1105
1019
if(mc.simple_poll != NULL){
1106
1020
avahi_simple_poll_quit(mc.simple_poll);
1107
1021
}
1108
1022
errno = old_errno;
1109
1023
}
1110
1024
1111
bool get_flags(const char *ifname, struct ifreq *ifr){
1112
int ret;
1113
1114
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1115
if(s < 0){
1116
perror_plus("socket");
1117
return false;
1118
}
1119
strcpy(ifr->ifr_name, ifname);
1120
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1121
if(ret == -1){
1025
/*
1026
* This function determines if a directory entry in /sys/class/net
1027
* corresponds to an acceptable network device.
1028
* (This function is passed to scandir(3) as a filter function.)
1029
*/
1030
int good_interface(const struct dirent *if_entry){
1031
ssize_t ssret;
1032
char *flagname = NULL;
1033
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1034
if_entry->d_name);
1035
if(ret < 0){
1036
perror("asprintf");
1037
return 0;
1038
}
1039
if(if_entry->d_name[0] == '.'){
1040
return 0;
1041
}
1042
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1043
if(flags_fd == -1){
1044
perror("open");
1045
return 0;
1046
}
1047
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
/* read line from flags_fd */
1049
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1050
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1051
flagstring[(size_t)to_read] = '\0';
1052
if(flagstring == NULL){
1053
perror("malloc");
1054
close(flags_fd);
1055
return 0;
1056
}
1057
while(to_read > 0){
1058
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1059
(size_t)to_read));
1060
if(ssret == -1){
1061
perror("read");
1062
free(flagstring);
1063
close(flags_fd);
1064
return 0;
1065
}
1066
to_read -= ssret;
1067
if(ssret == 0){
1068
break;
1069
}
1070
}
1071
close(flags_fd);
1072
intmax_t tmpmax;
1073
char *tmp;
1074
errno = 0;
1075
tmpmax = strtoimax(flagstring, &tmp, 0);
1076
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
and not (isspace(*tmp)))
1078
or tmpmax != (ifreq_flags)tmpmax){
1122
1079
if(debug){
1123
perror_plus("ioctl SIOCGIFFLAGS");
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1124
1082
}
1125
return false;
1083
free(flagstring);
1084
return 0;
1126
1085
}
1127
return true;
1128
}
1129
1130
bool good_flags(const char *ifname, const struct ifreq *ifr){
1131
1086
free(flagstring);
1087
ifreq_flags flags = (ifreq_flags)tmpmax;
1132
1088
/* Reject the loopback device */
1133
if(ifr->ifr_flags & IFF_LOOPBACK){
1089
if(flags & IFF_LOOPBACK){
1134
1090
if(debug){
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1092
if_entry->d_name);
1137
1093
}
1138
return false;
1094
return 0;
1139
1095
}
1140
1096
/* Accept point-to-point devices only if connect_to is specified */
1141
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1097
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1142
1098
if(debug){
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1100
if_entry->d_name);
1145
1101
}
1146
return true;
1102
return 1;
1147
1103
}
1148
1104
/* Otherwise, reject non-broadcast-capable devices */
1149
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1150
if(debug){
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1153
}
1154
return false;
1155
}
1156
/* Reject non-ARP interfaces (including dummy interfaces) */
1157
if(ifr->ifr_flags & IFF_NOARP){
1158
if(debug){
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1161
}
1162
return false;
1163
}
1164
1105
if(not (flags & IFF_BROADCAST)){
1106
if(debug){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1108
if_entry->d_name);
1109
}
1110
return 0;
1111
}
1165
1112
/* Accept this device */
1166
1113
if(debug){
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1168
}
1169
return true;
1170
}
1171
1172
/*
1173
* This function determines if a directory entry in /sys/class/net
1174
* corresponds to an acceptable network device.
1175
* (This function is passed to scandir(3) as a filter function.)
1176
*/
1177
int good_interface(const struct dirent *if_entry){
1178
if(if_entry->d_name[0] == '.'){
1179
return 0;
1180
}
1181
1182
struct ifreq ifr;
1183
if(not get_flags(if_entry->d_name, &ifr)){
1184
if(debug){
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1187
}
1188
return 0;
1189
}
1190
1191
if(not good_flags(if_entry->d_name, &ifr)){
1192
return 0;
1193
}
1194
return 1;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device which is up.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int up_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1204
return 0;
1205
}
1206
1207
struct ifreq ifr;
1208
if(not get_flags(if_entry->d_name, &ifr)){
1209
if(debug){
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1212
}
1213
return 0;
1214
}
1215
1216
/* Reject down interfaces */
1217
if(not (ifr.ifr_flags & IFF_UP)){
1218
if(debug){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1221
}
1222
return 0;
1223
}
1224
1225
/* Reject non-running interfaces */
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1230
}
1231
return 0;
1232
}
1233
1234
if(not good_flags(if_entry->d_name, &ifr)){
1235
return 0;
1236
}
1237
return 1;
1238
}
1239
1240
int notdotentries(const struct dirent *direntry){
1241
/* Skip "." and ".." */
1242
if(direntry->d_name[0] == '.'
1243
and (direntry->d_name[1] == '\0'
1244
or (direntry->d_name[1] == '.'
1245
and direntry->d_name[2] == '\0'))){
1246
return 0;
1247
}
1248
return 1;
1249
}
1250
1251
/* Is this directory entry a runnable program? */
1252
int runnable_hook(const struct dirent *direntry){
1253
int ret;
1254
size_t sret;
1255
struct stat st;
1256
1257
if((direntry->d_name)[0] == '\0'){
1258
/* Empty name? */
1259
return 0;
1260
}
1261
1262
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1263
"abcdefghijklmnopqrstuvwxyz"
1264
"0123456789"
1265
"_-");
1266
if((direntry->d_name)[sret] != '\0'){
1267
/* Contains non-allowed characters */
1268
if(debug){
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1270
direntry->d_name);
1271
}
1272
return 0;
1273
}
1274
1275
char *fullname = NULL;
1276
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
if(ret < 0){
1278
perror_plus("asprintf");
1279
return 0;
1280
}
1281
1282
ret = stat(fullname, &st);
1283
if(ret == -1){
1284
if(debug){
1285
perror_plus("Could not stat hook");
1286
}
1287
return 0;
1288
}
1289
if(not (S_ISREG(st.st_mode))){
1290
/* Not a regular file */
1291
if(debug){
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1294
}
1295
return 0;
1296
}
1297
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1298
/* Not executable */
1299
if(debug){
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1302
}
1303
return 0;
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1309
return 1;
1310
}
1311
1312
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1313
int ret;
1314
struct timespec now;
1315
struct timespec waited_time;
1316
intmax_t block_time;
1317
1318
while(true){
1319
if(mc.current_server == NULL){
1320
if (debug){
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1323
}
1324
ret = avahi_simple_poll_iterate(s, -1);
1325
} else {
1326
if (debug){
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1329
}
1330
/* the current time */
1331
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1332
if(ret == -1){
1333
perror_plus("clock_gettime");
1334
return -1;
1335
}
1336
/* Calculating in ms how long time between now and server
1337
who we visted longest time ago. Now - last seen. */
1338
waited_time.tv_sec = (now.tv_sec
1339
- mc.current_server->last_seen.tv_sec);
1340
waited_time.tv_nsec = (now.tv_nsec
1341
- mc.current_server->last_seen.tv_nsec);
1342
/* total time is 10s/10,000ms.
1343
Converting to s from ms by dividing by 1,000,
1344
and ns to ms by dividing by 1,000,000. */
1345
block_time = ((retry_interval
1346
- ((intmax_t)waited_time.tv_sec * 1000))
1347
- ((intmax_t)waited_time.tv_nsec / 1000000));
1348
1349
if (debug){
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1352
}
1353
1354
if(block_time <= 0){
1355
ret = start_mandos_communication(mc.current_server->ip,
1356
mc.current_server->port,
1357
mc.current_server->if_index,
1358
mc.current_server->af);
1359
if(ret == 0){
1360
avahi_simple_poll_quit(mc.simple_poll);
1361
return 0;
1362
}
1363
ret = clock_gettime(CLOCK_MONOTONIC,
1364
&mc.current_server->last_seen);
1365
if(ret == -1){
1366
perror_plus("clock_gettime");
1367
return -1;
1368
}
1369
mc.current_server = mc.current_server->next;
1370
block_time = 0; /* Call avahi to find new Mandos
1371
servers, but don't block */
1372
}
1373
1374
ret = avahi_simple_poll_iterate(s, (int)block_time);
1375
}
1376
if(ret != 0){
1377
if (ret > 0 or errno != EINTR){
1378
return (ret != 1) ? ret : 0;
1379
}
1380
}
1381
}
1382
}
1383
1384
bool run_network_hooks(const char *mode, const char *interface,
1385
const float delay){
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1388
int ret;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1390
alphasort);
1391
if(numhooks == -1){
1392
perror_plus("scandir");
1393
} else {
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
if(ret < 0){
1400
perror_plus("asprintf");
1401
continue;
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1407
pid_t hook_pid = fork();
1408
if(hook_pid == 0){
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
fprintf_plus(stderr, "Child: getuid() = %d\n", getuid());
1435
fprintf_plus(stderr, "Child: geteuid() = %d\n", geteuid());
1436
dup2(devnull, STDIN_FILENO);
1437
close(devnull);
1438
dup2(STDERR_FILENO, STDOUT_FILENO);
1439
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1440
if(ret == -1){
1441
perror_plus("setenv");
1442
_exit(EX_OSERR);
1443
}
1444
ret = setenv("DEVICE", interface, 1);
1445
if(ret == -1){
1446
perror_plus("setenv");
1447
_exit(EX_OSERR);
1448
}
1449
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1450
if(ret == -1){
1451
perror_plus("setenv");
1452
_exit(EX_OSERR);
1453
}
1454
ret = setenv("MODE", mode, 1);
1455
if(ret == -1){
1456
perror_plus("setenv");
1457
_exit(EX_OSERR);
1458
}
1459
char *delaystring;
1460
ret = asprintf(&delaystring, "%f", delay);
1461
if(ret == -1){
1462
perror_plus("asprintf");
1463
_exit(EX_OSERR);
1464
}
1465
ret = setenv("DELAY", delaystring, 1);
1466
if(ret == -1){
1467
free(delaystring);
1468
perror_plus("setenv");
1469
_exit(EX_OSERR);
1470
}
1471
free(delaystring);
1472
ret = execl(fullname, direntry->d_name, mode, NULL);
1473
perror_plus("execl");
1474
} else {
1475
int status;
1476
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1477
perror_plus("waitpid");
1478
free(fullname);
1479
continue;
1480
}
1481
if(WIFEXITED(status)){
1482
if(WEXITSTATUS(status) != 0){
1483
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1486
free(fullname);
1487
continue;
1488
}
1489
} else if(WIFSIGNALED(status)){
1490
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1491
" signal %d\n", direntry->d_name,
1492
WTERMSIG(status));
1493
free(fullname);
1494
continue;
1495
} else {
1496
fprintf_plus(stderr, "Warning: network hook \"%s\""
1497
" crashed\n", direntry->d_name);
1498
free(fullname);
1499
continue;
1500
}
1501
}
1502
free(fullname);
1503
if(debug){
1504
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1505
direntry->d_name);
1506
}
1507
}
1508
close(devnull);
1509
}
1510
return true;
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1115
if_entry->d_name);
1116
}
1117
return 1;
1511
1118
}
1512
1119
1513
1120
int main(int argc, char *argv[]){
1532
1139
bool gnutls_initialized = false;
1533
1140
bool gpgme_initialized = false;
1534
1141
float delay = 2.5f;
1535
double retry_interval = 10; /* 10s between trying a server and
1536
retrying the same server again */
1537
1142
1538
1143
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1539
1144
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1545
1150
errno = 0;
1546
1151
ret = setgid(gid);
1547
1152
if(ret == -1){
1548
perror_plus("setgid");
1153
perror("setgid");
1549
1154
}
1550
1155
1551
1156
/* Lower user privileges (temporarily) */
1552
1157
errno = 0;
1553
1158
ret = seteuid(uid);
1554
1159
if(ret == -1){
1555
perror_plus("seteuid");
1160
perror("seteuid");
1556
1161
}
1557
1162
1558
1163
if(quit_now){
1593
1198
.arg = "SECONDS",
1594
1199
.doc = "Maximum delay to wait for interface startup",
1595
1200
.group = 2 },
1596
{ .name = "retry", .key = 132,
1597
.arg = "SECONDS",
1598
.doc = "Retry interval used when denied by the mandos server",
1599
.group = 2 },
1600
{ .name = "network-hook-dir", .key = 133,
1601
.arg = "DIR",
1602
.doc = "Directory where network hooks are located",
1603
.group = 2 },
1604
1201
/*
1605
1202
* These reproduce what we would get without ARGP_NO_HELP
1606
1203
*/
1650
1247
if(errno != 0 or tmp == arg or *tmp != '\0'){
1651
1248
argp_error(state, "Bad delay");
1652
1249
}
1653
case 132: /* --retry */
1654
errno = 0;
1655
retry_interval = strtod(arg, &tmp);
1656
if(errno != 0 or tmp == arg or *tmp != '\0'
1657
or (retry_interval * 1000) > INT_MAX
1658
or retry_interval < 0){
1659
argp_error(state, "Bad retry interval");
1660
}
1661
break;
1662
case 133: /* --network-hook-dir */
1663
hookdir = arg;
1664
1250
break;
1665
1251
/*
1666
1252
* These reproduce what we would get without ARGP_NO_HELP
1673
1259
argp_state_help(state, state->out_stream,
1674
1260
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1675
1261
case 'V': /* --version */
1676
fprintf_plus(state->out_stream,
1677
"Mandos plugin mandos-client: ");
1678
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1262
fprintf(state->out_stream, "%s\n", argp_program_version);
1679
1263
exit(argp_err_exit_status);
1680
1264
break;
1681
1265
default:
1696
1280
case ENOMEM:
1697
1281
default:
1698
1282
errno = ret;
1699
perror_plus("argp_parse");
1283
perror("argp_parse");
1700
1284
exitcode = EX_OSERR;
1701
1285
goto end;
1702
1286
case EINVAL:
1704
1288
goto end;
1705
1289
}
1706
1290
}
1707
1708
{
1709
/* Work around Debian bug #633582:
1710
<http://bugs.debian.org/633582> */
1711
1712
/* Re-raise priviliges */
1713
errno = 0;
1714
ret = seteuid(0);
1715
if(ret == -1){
1716
perror_plus("seteuid");
1717
} else {
1718
struct stat st;
1719
1720
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1721
int seckey_fd = open(seckey, O_RDONLY);
1722
if(seckey_fd == -1){
1723
perror_plus("open");
1724
} else {
1725
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1726
if(ret == -1){
1727
perror_plus("fstat");
1728
} else {
1729
if(S_ISREG(st.st_mode)
1730
and st.st_uid == 0 and st.st_gid == 0){
1731
ret = fchown(seckey_fd, uid, gid);
1732
if(ret == -1){
1733
perror_plus("fchown");
1734
}
1735
}
1736
}
1737
TEMP_FAILURE_RETRY(close(seckey_fd));
1738
}
1739
}
1740
1741
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1742
int pubkey_fd = open(pubkey, O_RDONLY);
1743
if(pubkey_fd == -1){
1744
perror_plus("open");
1745
} else {
1746
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1747
if(ret == -1){
1748
perror_plus("fstat");
1749
} else {
1750
if(S_ISREG(st.st_mode)
1751
and st.st_uid == 0 and st.st_gid == 0){
1752
ret = fchown(pubkey_fd, uid, gid);
1753
if(ret == -1){
1754
perror_plus("fchown");
1755
}
1756
}
1757
}
1758
TEMP_FAILURE_RETRY(close(pubkey_fd));
1759
}
1760
}
1761
1762
/* Lower privileges */
1763
errno = 0;
1764
ret = seteuid(uid);
1765
if(ret == -1){
1766
perror_plus("seteuid");
1767
}
1768
}
1769
}
1770
1771
/* Run network hooks */
1772
if(not run_network_hooks("start", interface, delay)){
1773
goto end;
1774
}
1775
1291
1776
1292
if(not debug){
1777
1293
avahi_set_log_function(empty_log);
1778
1294
}
1779
1295
1780
1296
if(interface[0] == '\0'){
1781
1297
struct dirent **direntries;
1782
/* First look for interfaces that are up */
1783
ret = scandir(sys_class_net, &direntries, up_interface,
1298
ret = scandir(sys_class_net, &direntries, good_interface,
1784
1299
alphasort);
1785
if(ret == 0){
1786
/* No up interfaces, look for any good interfaces */
1787
free(direntries);
1788
ret = scandir(sys_class_net, &direntries, good_interface,
1789
alphasort);
1790
}
1791
1300
if(ret >= 1){
1792
/* Pick the first interface returned */
1301
/* Pick the first good interface */
1793
1302
interface = strdup(direntries[0]->d_name);
1794
1303
if(debug){
1795
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1304
fprintf(stderr, "Using interface \"%s\"\n", interface);
1796
1305
}
1797
1306
if(interface == NULL){
1798
perror_plus("malloc");
1307
perror("malloc");
1799
1308
free(direntries);
1800
1309
exitcode = EXIT_FAILURE;
1801
1310
goto end;
1803
1312
free(direntries);
1804
1313
} else {
1805
1314
free(direntries);
1806
fprintf_plus(stderr, "Could not find a network interface\n");
1315
fprintf(stderr, "Could not find a network interface\n");
1807
1316
exitcode = EXIT_FAILURE;
1808
1317
goto end;
1809
1318
}
1815
1324
srand((unsigned int) time(NULL));
1816
1325
mc.simple_poll = avahi_simple_poll_new();
1817
1326
if(mc.simple_poll == NULL){
1818
fprintf_plus(stderr,
1819
"Avahi: Failed to create simple poll object.\n");
1327
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1820
1328
exitcode = EX_UNAVAILABLE;
1821
1329
goto end;
1822
1330
}
1824
1332
sigemptyset(&sigterm_action.sa_mask);
1825
1333
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1826
1334
if(ret == -1){
1827
perror_plus("sigaddset");
1335
perror("sigaddset");
1828
1336
exitcode = EX_OSERR;
1829
1337
goto end;
1830
1338
}
1831
1339
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1832
1340
if(ret == -1){
1833
perror_plus("sigaddset");
1341
perror("sigaddset");
1834
1342
exitcode = EX_OSERR;
1835
1343
goto end;
1836
1344
}
1837
1345
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1838
1346
if(ret == -1){
1839
perror_plus("sigaddset");
1347
perror("sigaddset");
1840
1348
exitcode = EX_OSERR;
1841
1349
goto end;
1842
1350
}
1846
1354
*/
1847
1355
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1848
1356
if(ret == -1){
1849
perror_plus("sigaction");
1357
perror("sigaction");
1850
1358
return EX_OSERR;
1851
1359
}
1852
1360
if(old_sigterm_action.sa_handler != SIG_IGN){
1853
1361
ret = sigaction(SIGINT, &sigterm_action, NULL);
1854
1362
if(ret == -1){
1855
perror_plus("sigaction");
1363
perror("sigaction");
1856
1364
exitcode = EX_OSERR;
1857
1365
goto end;
1858
1366
}
1859
1367
}
1860
1368
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1861
1369
if(ret == -1){
1862
perror_plus("sigaction");
1370
perror("sigaction");
1863
1371
return EX_OSERR;
1864
1372
}
1865
1373
if(old_sigterm_action.sa_handler != SIG_IGN){
1866
1374
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1867
1375
if(ret == -1){
1868
perror_plus("sigaction");
1376
perror("sigaction");
1869
1377
exitcode = EX_OSERR;
1870
1378
goto end;
1871
1379
}
1872
1380
}
1873
1381
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1874
1382
if(ret == -1){
1875
perror_plus("sigaction");
1383
perror("sigaction");
1876
1384
return EX_OSERR;
1877
1385
}
1878
1386
if(old_sigterm_action.sa_handler != SIG_IGN){
1879
1387
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1880
1388
if(ret == -1){
1881
perror_plus("sigaction");
1389
perror("sigaction");
1882
1390
exitcode = EX_OSERR;
1883
1391
goto end;
1884
1392
}
1888
1396
if(strcmp(interface, "none") != 0){
1889
1397
if_index = (AvahiIfIndex) if_nametoindex(interface);
1890
1398
if(if_index == 0){
1891
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1399
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1892
1400
exitcode = EX_UNAVAILABLE;
1893
1401
goto end;
1894
1402
}
1901
1409
errno = 0;
1902
1410
ret = seteuid(0);
1903
1411
if(ret == -1){
1904
perror_plus("seteuid");
1412
perror("seteuid");
1905
1413
}
1906
1414
1907
1415
#ifdef __linux__
1911
1419
bool restore_loglevel = true;
1912
1420
if(ret == -1){
1913
1421
restore_loglevel = false;
1914
perror_plus("klogctl");
1422
perror("klogctl");
1915
1423
}
1916
1424
#endif /* __linux__ */
1917
1425
1918
1426
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1919
1427
if(sd < 0){
1920
perror_plus("socket");
1428
perror("socket");
1921
1429
exitcode = EX_OSERR;
1922
1430
#ifdef __linux__
1923
1431
if(restore_loglevel){
1924
1432
ret = klogctl(7, NULL, 0);
1925
1433
if(ret == -1){
1926
perror_plus("klogctl");
1434
perror("klogctl");
1927
1435
}
1928
1436
}
1929
1437
#endif /* __linux__ */
1931
1439
errno = 0;
1932
1440
ret = seteuid(uid);
1933
1441
if(ret == -1){
1934
perror_plus("seteuid");
1442
perror("seteuid");
1935
1443
}
1936
1444
goto end;
1937
1445
}
1938
1446
strcpy(network.ifr_name, interface);
1939
1447
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1940
1448
if(ret == -1){
1941
perror_plus("ioctl SIOCGIFFLAGS");
1449
perror("ioctl SIOCGIFFLAGS");
1942
1450
#ifdef __linux__
1943
1451
if(restore_loglevel){
1944
1452
ret = klogctl(7, NULL, 0);
1945
1453
if(ret == -1){
1946
perror_plus("klogctl");
1454
perror("klogctl");
1947
1455
}
1948
1456
}
1949
1457
#endif /* __linux__ */
1952
1460
errno = 0;
1953
1461
ret = seteuid(uid);
1954
1462
if(ret == -1){
1955
perror_plus("seteuid");
1463
perror("seteuid");
1956
1464
}
1957
1465
goto end;
1958
1466
}
1962
1470
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1963
1471
if(ret == -1){
1964
1472
take_down_interface = false;
1965
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1966
1474
exitcode = EX_OSERR;
1967
1475
#ifdef __linux__
1968
1476
if(restore_loglevel){
1969
1477
ret = klogctl(7, NULL, 0);
1970
1478
if(ret == -1){
1971
perror_plus("klogctl");
1479
perror("klogctl");
1972
1480
}
1973
1481
}
1974
1482
#endif /* __linux__ */
1976
1484
errno = 0;
1977
1485
ret = seteuid(uid);
1978
1486
if(ret == -1){
1979
perror_plus("seteuid");
1487
perror("seteuid");
1980
1488
}
1981
1489
goto end;
1982
1490
}
1983
1491
}
1984
/* Sleep checking until interface is running.
1985
Check every 0.25s, up to total time of delay */
1492
/* sleep checking until interface is running */
1986
1493
for(int i=0; i < delay * 4; i++){
1987
1494
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1988
1495
if(ret == -1){
1989
perror_plus("ioctl SIOCGIFFLAGS");
1496
perror("ioctl SIOCGIFFLAGS");
1990
1497
} else if(network.ifr_flags & IFF_RUNNING){
1991
1498
break;
1992
1499
}
1993
1500
struct timespec sleeptime = { .tv_nsec = 250000000 };
1994
1501
ret = nanosleep(&sleeptime, NULL);
1995
1502
if(ret == -1 and errno != EINTR){
1996
perror_plus("nanosleep");
1503
perror("nanosleep");
1997
1504
}
1998
1505
}
1999
1506
if(not take_down_interface){
2000
1507
/* We won't need the socket anymore */
2001
1508
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2002
1509
if(ret == -1){
2003
perror_plus("close");
1510
perror("close");
2004
1511
}
2005
1512
}
2006
1513
#ifdef __linux__
2008
1515
/* Restores kernel loglevel to default */
2009
1516
ret = klogctl(7, NULL, 0);
2010
1517
if(ret == -1){
2011
perror_plus("klogctl");
1518
perror("klogctl");
2012
1519
}
2013
1520
}
2014
1521
#endif /* __linux__ */
2015
1522
/* Lower privileges */
2016
1523
errno = 0;
2017
/* Lower privileges */
2018
ret = seteuid(uid);
2019
if(ret == -1){
2020
perror_plus("seteuid");
1524
if(take_down_interface){
1525
/* Lower privileges */
1526
ret = seteuid(uid);
1527
if(ret == -1){
1528
perror("seteuid");
1529
}
1530
} else {
1531
/* Lower privileges permanently */
1532
ret = setuid(uid);
1533
if(ret == -1){
1534
perror("setuid");
1535
}
2021
1536
}
2022
1537
}
2023
1538
2027
1542
2028
1543
ret = init_gnutls_global(pubkey, seckey);
2029
1544
if(ret == -1){
2030
fprintf_plus(stderr, "init_gnutls_global failed\n");
1545
fprintf(stderr, "init_gnutls_global failed\n");
2031
1546
exitcode = EX_UNAVAILABLE;
2032
1547
goto end;
2033
1548
} else {
2038
1553
goto end;
2039
1554
}
2040
1555
1556
tempdir_created = true;
2041
1557
if(mkdtemp(tempdir) == NULL){
2042
perror_plus("mkdtemp");
1558
tempdir_created = false;
1559
perror("mkdtemp");
2043
1560
goto end;
2044
1561
}
2045
tempdir_created = true;
2046
1562
2047
1563
if(quit_now){
2048
1564
goto end;
2049
1565
}
2050
1566
2051
1567
if(not init_gpgme(pubkey, seckey, tempdir)){
2052
fprintf_plus(stderr, "init_gpgme failed\n");
1568
fprintf(stderr, "init_gpgme failed\n");
2053
1569
exitcode = EX_UNAVAILABLE;
2054
1570
goto end;
2055
1571
} else {
2065
1581
/* (Mainly meant for debugging) */
2066
1582
char *address = strrchr(connect_to, ':');
2067
1583
if(address == NULL){
2068
fprintf_plus(stderr, "No colon in address\n");
1584
fprintf(stderr, "No colon in address\n");
2069
1585
exitcode = EX_USAGE;
2070
1586
goto end;
2071
1587
}
2079
1595
tmpmax = strtoimax(address+1, &tmp, 10);
2080
1596
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2081
1597
or tmpmax != (uint16_t)tmpmax){
2082
fprintf_plus(stderr, "Bad port number\n");
1598
fprintf(stderr, "Bad port number\n");
2083
1599
exitcode = EX_USAGE;
2084
1600
goto end;
2085
1601
}
2090
1606
2091
1607
port = (uint16_t)tmpmax;
2092
1608
*address = '\0';
1609
address = connect_to;
2093
1610
/* Colon in address indicates IPv6 */
2094
1611
int af;
2095
if(strchr(connect_to, ':') != NULL){
1612
if(strchr(address, ':') != NULL){
2096
1613
af = AF_INET6;
2097
/* Accept [] around IPv6 address - see RFC 5952 */
2098
if(connect_to[0] == '[' and address[-1] == ']')
2099
{
2100
connect_to++;
2101
address[-1] = '\0';
2102
}
2103
1614
} else {
2104
1615
af = AF_INET;
2105
1616
}
2106
address = connect_to;
2107
1617
2108
1618
if(quit_now){
2109
1619
goto end;
2110
1620
}
2111
1621
2112
while(not quit_now){
2113
ret = start_mandos_communication(address, port, if_index, af);
2114
if(quit_now or ret == 0){
2115
break;
2116
}
2117
if(debug){
2118
fprintf_plus(stderr, "Retrying in %d seconds\n",
2119
(int)retry_interval);
2120
}
2121
sleep((int)retry_interval);
2122
}
2123
2124
if (not quit_now){
1622
ret = start_mandos_communication(address, port, if_index, af);
1623
if(ret < 0){
1624
switch(errno){
1625
case ENETUNREACH:
1626
case EHOSTDOWN:
1627
case EHOSTUNREACH:
1628
exitcode = EX_NOHOST;
1629
break;
1630
case EINVAL:
1631
exitcode = EX_USAGE;
1632
break;
1633
case EIO:
1634
exitcode = EX_IOERR;
1635
break;
1636
case EPROTO:
1637
exitcode = EX_PROTOCOL;
1638
break;
1639
default:
1640
exitcode = EX_OSERR;
1641
break;
1642
}
1643
} else {
2125
1644
exitcode = EXIT_SUCCESS;
2126
1645
}
2127
2128
1646
goto end;
2129
1647
}
2130
1648
2152
1670
2153
1671
/* Check if creating the Avahi server object succeeded */
2154
1672
if(mc.server == NULL){
2155
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2156
avahi_strerror(error));
1673
fprintf(stderr, "Failed to create Avahi server: %s\n",
1674
avahi_strerror(error));
2157
1675
exitcode = EX_UNAVAILABLE;
2158
1676
goto end;
2159
1677
}
2167
1685
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2168
1686
NULL, 0, browse_callback, NULL);
2169
1687
if(sb == NULL){
2170
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2171
avahi_strerror(avahi_server_errno(mc.server)));
1688
fprintf(stderr, "Failed to create service browser: %s\n",
1689
avahi_strerror(avahi_server_errno(mc.server)));
2172
1690
exitcode = EX_UNAVAILABLE;
2173
1691
goto end;
2174
1692
}
2180
1698
/* Run the main loop */
2181
1699
2182
1700
if(debug){
2183
fprintf_plus(stderr, "Starting Avahi loop search\n");
2184
}
2185
2186
ret = avahi_loop_with_timeout(mc.simple_poll,
2187
(int)(retry_interval * 1000));
2188
if(debug){
2189
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2190
(ret == 0) ? "successfully" : "with error");
2191
}
1701
fprintf(stderr, "Starting Avahi loop search\n");
1702
}
1703
1704
avahi_simple_poll_loop(mc.simple_poll);
2192
1705
2193
1706
end:
2194
1707
2195
1708
if(debug){
2196
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1709
fprintf(stderr, "%s exiting\n", argv[0]);
2197
1710
}
2198
1711
2199
1712
/* Cleanup things */
2216
1729
gpgme_release(mc.ctx);
2217
1730
}
2218
1731
2219
/* Cleans up the circular linked list of Mandos servers the client
2220
has seen */
2221
if(mc.current_server != NULL){
2222
mc.current_server->prev->next = NULL;
2223
while(mc.current_server != NULL){
2224
server *next = mc.current_server->next;
2225
free(mc.current_server);
2226
mc.current_server = next;
2227
}
2228
}
2229
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2232
2233
/* Re-raise priviliges */
2234
{
1732
/* Take down the network interface */
1733
if(take_down_interface){
1734
/* Re-raise priviliges */
2235
1735
errno = 0;
2236
1736
ret = seteuid(0);
2237
1737
if(ret == -1){
2238
perror_plus("seteuid");
1738
perror("seteuid");
2239
1739
}
2240
2241
/* Take down the network interface */
2242
if(take_down_interface and geteuid() == 0){
1740
if(geteuid() == 0){
2243
1741
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2244
1742
if(ret == -1){
2245
perror_plus("ioctl SIOCGIFFLAGS");
2246
} else if(network.ifr_flags & IFF_UP){
1743
perror("ioctl SIOCGIFFLAGS");
1744
} else if(network.ifr_flags & IFF_UP) {
2247
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2248
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2249
1747
if(ret == -1){
2250
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2251
1749
}
2252
1750
}
2253
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2254
1752
if(ret == -1){
2255
perror_plus("close");
1753
perror("close");
1754
}
1755
/* Lower privileges permanently */
1756
errno = 0;
1757
ret = setuid(uid);
1758
if(ret == -1){
1759
perror("setuid");
2256
1760
}
2257
1761
}
2258
1762
}
2259
/* Lower privileges permanently */
2260
errno = 0;
2261
ret = setuid(uid);
2262
if(ret == -1){
2263
perror_plus("setuid");
2264
}
2265
1763
2266
/* Removes the GPGME temp directory and all files inside */
1764
/* Removes the temp directory used by GPGME */
2267
1765
if(tempdir_created){
2268
struct dirent **direntries = NULL;
2269
struct dirent *direntry = NULL;
2270
int numentries = scandir(tempdir, &direntries, notdotentries,
2271
alphasort);
2272
if (numentries > 0){
2273
for(int i = 0; i < numentries; i++){
2274
direntry = direntries[i];
1766
DIR *d;
1767
struct dirent *direntry;
1768
d = opendir(tempdir);
1769
if(d == NULL){
1770
if(errno != ENOENT){
1771
perror("opendir");
1772
}
1773
} else {
1774
while(true){
1775
direntry = readdir(d);
1776
if(direntry == NULL){
1777
break;
1778
}
1779
/* Skip "." and ".." */
1780
if(direntry->d_name[0] == '.'
1781
and (direntry->d_name[1] == '\0'
1782
or (direntry->d_name[1] == '.'
1783
and direntry->d_name[2] == '\0'))){
1784
continue;
1785
}
2275
1786
char *fullname = NULL;
2276
1787
ret = asprintf(&fullname, "%s/%s", tempdir,
2277
1788
direntry->d_name);
2278
1789
if(ret < 0){
2279
perror_plus("asprintf");
1790
perror("asprintf");
2280
1791
continue;
2281
1792
}
2282
1793
ret = remove(fullname);
2283
1794
if(ret == -1){
2284
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2285
strerror(errno));
1795
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1796
strerror(errno));
2286
1797
}
2287
1798
free(fullname);
2288
1799
}
2289
}
2290
2291
/* need to clean even if 0 because man page doesn't specify */
2292
free(direntries);
2293
if (numentries == -1){
2294
perror_plus("scandir");
1800
closedir(d);
2295
1801
}
2296
1802
ret = rmdir(tempdir);
2297
1803
if(ret == -1 and errno != ENOENT){
2298
perror_plus("rmdir");
1804
perror("rmdir");
2299
1805
}
2300
1806
}
2301
1807
2306
1812
&old_sigterm_action,
2307
1813
NULL));
2308
1814
if(ret == -1){
2309
perror_plus("sigaction");
1815
perror("sigaction");
2310
1816
}
2311
1817
do {
2312
1818
ret = raise(signal_received);
2313
1819
} while(ret != 0 and errno == EINTR);
2314
1820
if(ret != 0){
2315
perror_plus("raise");
1821
perror("raise");
2316
1822
abort();
2317
1823
}
2318
1824
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0