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- Committer: Teddy Hogeborn
- Date: 2009-10-26 21:16:16 UTC
- Revision ID: teddy@fukt.bsnet.se-20091026211616-38e9wynf4428ip2l
Merge from release branch.
- 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 © 2008-2011 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() */
43
43
stdout, ferror(), remove() */
44
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() */
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,
83
82
#include <signal.h> /* sigemptyset(), sigaddset(),
84
83
sigaction(), SIGTERM, sig_atomic_t,
85
84
raise() */
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
91
86
92
87
#ifdef __linux__
93
88
#include <sys/klog.h> /* klogctl() */
111
106
init_gnutls_session(),
112
107
GNUTLS_* */
113
108
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
109
/* gnutls_certificate_set_openpgp_key_file(),
110
GNUTLS_OPENPGP_FMT_BASE64 */
116
111
117
112
/* GPGME */
118
113
#include <gpgme.h> /* All GPGME types, constants and
126
121
#define PATHDIR "/conf/conf.d/mandos"
127
122
#define SECKEY "seckey.txt"
128
123
#define PUBKEY "pubkey.txt"
129
#define HOOKDIR "/lib/mandos/network-hooks.d"
130
124
131
125
bool debug = false;
132
126
static const char mandos_protocol_version[] = "1";
133
127
const char *argp_program_version = "mandos-client " VERSION;
134
const char *argp_program_bug_address = "<mandos@recompile.se>";
135
static const char sys_class_net[] = "/sys/class/net";
136
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
139
/* Doubly linked list that need to be circularly linked when used */
140
typedef struct server{
141
const char *ip;
142
uint16_t port;
143
AvahiIfIndex if_index;
144
int af;
145
struct timespec last_seen;
146
struct server *next;
147
struct server *prev;
148
} server;
128
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
149
129
150
130
/* Used for passing in values through the Avahi callback functions */
151
131
typedef struct {
156
136
gnutls_dh_params_t dh_params;
157
137
const char *priority;
158
138
gpgme_ctx_t ctx;
159
server *current_server;
160
139
} mandos_context;
161
140
162
141
/* global context so signal handler can reach it*/
163
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
164
143
.dh_bits = 1024, .priority = "SECURE256"
165
":!CTYPE-X.509:+CTYPE-OPENPGP",
166
.current_server = NULL };
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
167
145
168
146
sig_atomic_t quit_now = 0;
169
147
int signal_received = 0;
170
148
171
/* Function to use when printing errors */
172
void perror_plus(const char *print_text){
173
fprintf(stderr, "Mandos plugin %s: ",
174
program_invocation_short_name);
175
perror(print_text);
176
}
177
178
__attribute__((format (gnu_printf, 2, 3)))
179
int fprintf_plus(FILE *stream, const char *format, ...){
180
va_list ap;
181
va_start (ap, format);
182
183
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
184
program_invocation_short_name));
185
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
186
}
187
188
149
/*
189
150
* Make additional room in "buffer" for at least BUFFER_SIZE more
190
151
* bytes. "buffer_capacity" is how much is currently allocated,
191
152
* "buffer_length" is how much is already used.
192
153
*/
193
154
size_t incbuffer(char **buffer, size_t buffer_length,
194
size_t buffer_capacity){
155
size_t buffer_capacity){
195
156
if(buffer_length + BUFFER_SIZE > buffer_capacity){
196
157
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
197
158
if(buffer == NULL){
202
163
return buffer_capacity;
203
164
}
204
165
205
/* Add server to set of servers to retry periodically */
206
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
207
int af){
208
int ret;
209
server *new_server = malloc(sizeof(server));
210
if(new_server == NULL){
211
perror_plus("malloc");
212
return false;
213
}
214
*new_server = (server){ .ip = strdup(ip),
215
.port = port,
216
.if_index = if_index,
217
.af = af };
218
if(new_server->ip == NULL){
219
perror_plus("strdup");
220
return false;
221
}
222
/* Special case of first server */
223
if (mc.current_server == NULL){
224
new_server->next = new_server;
225
new_server->prev = new_server;
226
mc.current_server = new_server;
227
/* Place the new server last in the list */
228
} else {
229
new_server->next = mc.current_server;
230
new_server->prev = mc.current_server->prev;
231
new_server->prev->next = new_server;
232
mc.current_server->prev = new_server;
233
}
234
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
235
if(ret == -1){
236
perror_plus("clock_gettime");
237
return false;
238
}
239
return true;
240
}
241
242
166
/*
243
167
* Initialize GPGME.
244
168
*/
245
static bool init_gpgme(const char *seckey, const char *pubkey,
246
const char *tempdir){
169
static bool init_gpgme(const char *seckey,
170
const char *pubkey, const char *tempdir){
247
171
gpgme_error_t rc;
248
172
gpgme_engine_info_t engine_info;
249
173
258
182
259
183
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
260
184
if(fd == -1){
261
perror_plus("open");
185
perror("open");
262
186
return false;
263
187
}
264
188
265
189
rc = gpgme_data_new_from_fd(&pgp_data, fd);
266
190
if(rc != GPG_ERR_NO_ERROR){
267
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
268
gpgme_strsource(rc), gpgme_strerror(rc));
191
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
192
gpgme_strsource(rc), gpgme_strerror(rc));
269
193
return false;
270
194
}
271
195
272
196
rc = gpgme_op_import(mc.ctx, pgp_data);
273
197
if(rc != GPG_ERR_NO_ERROR){
274
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
275
gpgme_strsource(rc), gpgme_strerror(rc));
198
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
276
200
return false;
277
201
}
278
202
279
203
ret = (int)TEMP_FAILURE_RETRY(close(fd));
280
204
if(ret == -1){
281
perror_plus("close");
205
perror("close");
282
206
}
283
207
gpgme_data_release(pgp_data);
284
208
return true;
285
209
}
286
210
287
211
if(debug){
288
fprintf_plus(stderr, "Initializing GPGME\n");
212
fprintf(stderr, "Initializing GPGME\n");
289
213
}
290
214
291
215
/* Init GPGME */
292
216
gpgme_check_version(NULL);
293
217
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
294
218
if(rc != GPG_ERR_NO_ERROR){
295
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
296
gpgme_strsource(rc), gpgme_strerror(rc));
219
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
220
gpgme_strsource(rc), gpgme_strerror(rc));
297
221
return false;
298
222
}
299
223
300
/* Set GPGME home directory for the OpenPGP engine only */
224
/* Set GPGME home directory for the OpenPGP engine only */
301
225
rc = gpgme_get_engine_info(&engine_info);
302
226
if(rc != GPG_ERR_NO_ERROR){
303
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
227
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
228
gpgme_strsource(rc), gpgme_strerror(rc));
305
229
return false;
306
230
}
307
231
while(engine_info != NULL){
313
237
engine_info = engine_info->next;
314
238
}
315
239
if(engine_info == NULL){
316
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
317
tempdir);
240
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
318
241
return false;
319
242
}
320
243
321
244
/* Create new GPGME "context" */
322
245
rc = gpgme_new(&(mc.ctx));
323
246
if(rc != GPG_ERR_NO_ERROR){
324
fprintf_plus(stderr, "Mandos plugin mandos-client: "
325
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
326
gpgme_strerror(rc));
247
fprintf(stderr, "bad gpgme_new: %s: %s\n",
248
gpgme_strsource(rc), gpgme_strerror(rc));
327
249
return false;
328
250
}
329
251
348
270
ssize_t plaintext_length = 0;
349
271
350
272
if(debug){
351
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
273
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
352
274
}
353
275
354
276
/* Create new GPGME data buffer from memory cryptotext */
355
277
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
356
278
0);
357
279
if(rc != GPG_ERR_NO_ERROR){
358
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
359
gpgme_strsource(rc), gpgme_strerror(rc));
280
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
360
282
return -1;
361
283
}
362
284
363
285
/* Create new empty GPGME data buffer for the plaintext */
364
286
rc = gpgme_data_new(&dh_plain);
365
287
if(rc != GPG_ERR_NO_ERROR){
366
fprintf_plus(stderr, "Mandos plugin mandos-client: "
367
"bad gpgme_data_new: %s: %s\n",
368
gpgme_strsource(rc), gpgme_strerror(rc));
288
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
369
290
gpgme_data_release(dh_crypto);
370
291
return -1;
371
292
}
374
295
data buffer */
375
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
376
297
if(rc != GPG_ERR_NO_ERROR){
377
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
378
gpgme_strsource(rc), gpgme_strerror(rc));
298
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
379
300
plaintext_length = -1;
380
301
if(debug){
381
302
gpgme_decrypt_result_t result;
382
303
result = gpgme_op_decrypt_result(mc.ctx);
383
304
if(result == NULL){
384
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
305
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
385
306
} else {
386
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
387
result->unsupported_algorithm);
388
fprintf_plus(stderr, "Wrong key usage: %u\n",
389
result->wrong_key_usage);
307
fprintf(stderr, "Unsupported algorithm: %s\n",
308
result->unsupported_algorithm);
309
fprintf(stderr, "Wrong key usage: %u\n",
310
result->wrong_key_usage);
390
311
if(result->file_name != NULL){
391
fprintf_plus(stderr, "File name: %s\n", result->file_name);
312
fprintf(stderr, "File name: %s\n", result->file_name);
392
313
}
393
314
gpgme_recipient_t recipient;
394
315
recipient = result->recipients;
395
316
while(recipient != NULL){
396
fprintf_plus(stderr, "Public key algorithm: %s\n",
397
gpgme_pubkey_algo_name
398
(recipient->pubkey_algo));
399
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
400
fprintf_plus(stderr, "Secret key available: %s\n",
401
recipient->status == GPG_ERR_NO_SECKEY
402
? "No" : "Yes");
317
fprintf(stderr, "Public key algorithm: %s\n",
318
gpgme_pubkey_algo_name(recipient->pubkey_algo));
319
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
320
fprintf(stderr, "Secret key available: %s\n",
321
recipient->status == GPG_ERR_NO_SECKEY
322
? "No" : "Yes");
403
323
recipient = recipient->next;
404
324
}
405
325
}
408
328
}
409
329
410
330
if(debug){
411
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
331
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
412
332
}
413
333
414
334
/* Seek back to the beginning of the GPGME plaintext data buffer */
415
335
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
416
perror_plus("gpgme_data_seek");
336
perror("gpgme_data_seek");
417
337
plaintext_length = -1;
418
338
goto decrypt_end;
419
339
}
421
341
*plaintext = NULL;
422
342
while(true){
423
343
plaintext_capacity = incbuffer(plaintext,
424
(size_t)plaintext_length,
425
plaintext_capacity);
344
(size_t)plaintext_length,
345
plaintext_capacity);
426
346
if(plaintext_capacity == 0){
427
perror_plus("incbuffer");
428
plaintext_length = -1;
429
goto decrypt_end;
347
perror("incbuffer");
348
plaintext_length = -1;
349
goto decrypt_end;
430
350
}
431
351
432
352
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
437
357
break;
438
358
}
439
359
if(ret < 0){
440
perror_plus("gpgme_data_read");
360
perror("gpgme_data_read");
441
361
plaintext_length = -1;
442
362
goto decrypt_end;
443
363
}
445
365
}
446
366
447
367
if(debug){
448
fprintf_plus(stderr, "Decrypted password is: ");
368
fprintf(stderr, "Decrypted password is: ");
449
369
for(ssize_t i = 0; i < plaintext_length; i++){
450
370
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
451
371
}
473
393
/* GnuTLS log function callback */
474
394
static void debuggnutls(__attribute__((unused)) int level,
475
395
const char* string){
476
fprintf_plus(stderr, "GnuTLS: %s", string);
396
fprintf(stderr, "GnuTLS: %s", string);
477
397
}
478
398
479
399
static int init_gnutls_global(const char *pubkeyfilename,
481
401
int ret;
482
402
483
403
if(debug){
484
fprintf_plus(stderr, "Initializing GnuTLS\n");
404
fprintf(stderr, "Initializing GnuTLS\n");
485
405
}
486
406
487
407
ret = gnutls_global_init();
488
408
if(ret != GNUTLS_E_SUCCESS){
489
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
490
safer_gnutls_strerror(ret));
409
fprintf(stderr, "GnuTLS global_init: %s\n",
410
safer_gnutls_strerror(ret));
491
411
return -1;
492
412
}
493
413
500
420
}
501
421
502
422
/* OpenPGP credentials */
503
ret = gnutls_certificate_allocate_credentials(&mc.cred);
423
gnutls_certificate_allocate_credentials(&mc.cred);
504
424
if(ret != GNUTLS_E_SUCCESS){
505
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
506
safer_gnutls_strerror(ret));
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
429
safer_gnutls_strerror(ret));
507
430
gnutls_global_deinit();
508
431
return -1;
509
432
}
510
433
511
434
if(debug){
512
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
513
" secret key %s as GnuTLS credentials\n",
514
pubkeyfilename,
515
seckeyfilename);
435
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
436
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
437
seckeyfilename);
516
438
}
517
439
518
440
ret = gnutls_certificate_set_openpgp_key_file
519
441
(mc.cred, pubkeyfilename, seckeyfilename,
520
442
GNUTLS_OPENPGP_FMT_BASE64);
521
443
if(ret != GNUTLS_E_SUCCESS){
522
fprintf_plus(stderr,
523
"Error[%d] while reading the OpenPGP key pair ('%s',"
524
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
525
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
526
safer_gnutls_strerror(ret));
444
fprintf(stderr,
445
"Error[%d] while reading the OpenPGP key pair ('%s',"
446
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
447
fprintf(stderr, "The GnuTLS error is: %s\n",
448
safer_gnutls_strerror(ret));
527
449
goto globalfail;
528
450
}
529
451
530
452
/* GnuTLS server initialization */
531
453
ret = gnutls_dh_params_init(&mc.dh_params);
532
454
if(ret != GNUTLS_E_SUCCESS){
533
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
534
" initialization: %s\n",
535
safer_gnutls_strerror(ret));
455
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
456
" %s\n", safer_gnutls_strerror(ret));
536
457
goto globalfail;
537
458
}
538
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
539
460
if(ret != GNUTLS_E_SUCCESS){
540
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
541
safer_gnutls_strerror(ret));
461
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
462
safer_gnutls_strerror(ret));
542
463
goto globalfail;
543
464
}
544
465
564
485
}
565
486
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
566
487
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr,
568
"Error in GnuTLS session initialization: %s\n",
569
safer_gnutls_strerror(ret));
488
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
489
safer_gnutls_strerror(ret));
570
490
}
571
491
572
492
{
579
499
}
580
500
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
581
501
if(ret != GNUTLS_E_SUCCESS){
582
fprintf_plus(stderr, "Syntax error at: %s\n", err);
583
fprintf_plus(stderr, "GnuTLS error: %s\n",
584
safer_gnutls_strerror(ret));
502
fprintf(stderr, "Syntax error at: %s\n", err);
503
fprintf(stderr, "GnuTLS error: %s\n",
504
safer_gnutls_strerror(ret));
585
505
gnutls_deinit(*session);
586
506
return -1;
587
507
}
596
516
}
597
517
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
598
518
if(ret != GNUTLS_E_SUCCESS){
599
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
600
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
520
safer_gnutls_strerror(ret));
601
521
gnutls_deinit(*session);
602
522
return -1;
603
523
}
633
553
gnutls_session_t session;
634
554
int pf; /* Protocol family */
635
555
636
errno = 0;
637
638
556
if(quit_now){
639
errno = EINTR;
640
557
return -1;
641
558
}
642
559
648
565
pf = PF_INET;
649
566
break;
650
567
default:
651
fprintf_plus(stderr, "Bad address family: %d\n", af);
652
errno = EINVAL;
568
fprintf(stderr, "Bad address family: %d\n", af);
653
569
return -1;
654
570
}
655
571
659
575
}
660
576
661
577
if(debug){
662
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
663
PRIu16 "\n", ip, port);
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
579
"\n", ip, port);
664
580
}
665
581
666
582
tcp_sd = socket(pf, SOCK_STREAM, 0);
667
583
if(tcp_sd < 0){
668
int e = errno;
669
perror_plus("socket");
670
errno = e;
584
perror("socket");
671
585
goto mandos_end;
672
586
}
673
587
674
588
if(quit_now){
675
errno = EINTR;
676
589
goto mandos_end;
677
590
}
678
591
685
598
ret = inet_pton(af, ip, &to.in.sin_addr);
686
599
}
687
600
if(ret < 0 ){
688
int e = errno;
689
perror_plus("inet_pton");
690
errno = e;
601
perror("inet_pton");
691
602
goto mandos_end;
692
603
}
693
604
if(ret == 0){
694
int e = errno;
695
fprintf_plus(stderr, "Bad address: %s\n", ip);
696
errno = e;
605
fprintf(stderr, "Bad address: %s\n", ip);
697
606
goto mandos_end;
698
607
}
699
608
if(af == AF_INET6){
703
612
704
613
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
705
614
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
706
-Wunreachable-code*/
615
-Wunreachable-code*/
707
616
if(if_index == AVAHI_IF_UNSPEC){
708
fprintf_plus(stderr, "An IPv6 link-local address is"
709
" incomplete without a network interface\n");
710
errno = EINVAL;
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
" without a network interface\n");
711
619
goto mandos_end;
712
620
}
713
621
/* Set the network interface number as scope */
720
628
}
721
629
722
630
if(quit_now){
723
errno = EINTR;
724
631
goto mandos_end;
725
632
}
726
633
728
635
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
729
636
char interface[IF_NAMESIZE];
730
637
if(if_indextoname((unsigned int)if_index, interface) == NULL){
731
perror_plus("if_indextoname");
638
perror("if_indextoname");
732
639
} else {
733
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
734
"\n", ip, interface, port);
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
641
ip, interface, port);
735
642
}
736
643
} else {
737
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
738
ip, port);
644
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
645
port);
739
646
}
740
647
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
741
648
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
748
655
sizeof(addrstr));
749
656
}
750
657
if(pcret == NULL){
751
perror_plus("inet_ntop");
658
perror("inet_ntop");
752
659
} else {
753
660
if(strcmp(addrstr, ip) != 0){
754
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
661
fprintf(stderr, "Canonical address form: %s\n", addrstr);
755
662
}
756
663
}
757
664
}
758
665
759
666
if(quit_now){
760
errno = EINTR;
761
667
goto mandos_end;
762
668
}
763
669
767
673
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
768
674
}
769
675
if(ret < 0){
770
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
int e = errno;
772
perror_plus("connect");
773
errno = e;
774
}
676
perror("connect");
775
677
goto mandos_end;
776
678
}
777
679
778
680
if(quit_now){
779
errno = EINTR;
780
681
goto mandos_end;
781
682
}
782
683
785
686
while(true){
786
687
size_t out_size = strlen(out);
787
688
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
788
out_size - written));
689
out_size - written));
789
690
if(ret == -1){
790
int e = errno;
791
perror_plus("write");
792
errno = e;
691
perror("write");
793
692
goto mandos_end;
794
693
}
795
694
written += (size_t)ret;
805
704
}
806
705
807
706
if(quit_now){
808
errno = EINTR;
809
707
goto mandos_end;
810
708
}
811
709
}
812
710
813
711
if(debug){
814
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
712
fprintf(stderr, "Establishing TLS session with %s\n", ip);
815
713
}
816
714
817
715
if(quit_now){
818
errno = EINTR;
819
716
goto mandos_end;
820
717
}
821
718
822
/* Spurious warning from -Wint-to-pointer-cast */
823
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
824
720
825
721
if(quit_now){
826
errno = EINTR;
827
722
goto mandos_end;
828
723
}
829
724
830
725
do {
831
726
ret = gnutls_handshake(session);
832
727
if(quit_now){
833
errno = EINTR;
834
728
goto mandos_end;
835
729
}
836
730
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
837
731
838
732
if(ret != GNUTLS_E_SUCCESS){
839
733
if(debug){
840
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
841
735
gnutls_perror(ret);
842
736
}
843
errno = EPROTO;
844
737
goto mandos_end;
845
738
}
846
739
847
740
/* Read OpenPGP packet that contains the wanted password */
848
741
849
742
if(debug){
850
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
851
" %s\n", ip);
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
744
ip);
852
745
}
853
746
854
747
while(true){
855
748
856
749
if(quit_now){
857
errno = EINTR;
858
750
goto mandos_end;
859
751
}
860
752
861
753
buffer_capacity = incbuffer(&buffer, buffer_length,
862
buffer_capacity);
754
buffer_capacity);
863
755
if(buffer_capacity == 0){
864
int e = errno;
865
perror_plus("incbuffer");
866
errno = e;
756
perror("incbuffer");
867
757
goto mandos_end;
868
758
}
869
759
870
760
if(quit_now){
871
errno = EINTR;
872
761
goto mandos_end;
873
762
}
874
763
887
776
ret = gnutls_handshake(session);
888
777
889
778
if(quit_now){
890
errno = EINTR;
891
779
goto mandos_end;
892
780
}
893
781
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
894
782
if(ret < 0){
895
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
896
"***\n");
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
897
784
gnutls_perror(ret);
898
errno = EPROTO;
899
785
goto mandos_end;
900
786
}
901
787
break;
902
788
default:
903
fprintf_plus(stderr, "Unknown error while reading data from"
904
" encrypted session with Mandos server\n");
789
fprintf(stderr, "Unknown error while reading data from"
790
" encrypted session with Mandos server\n");
905
791
gnutls_bye(session, GNUTLS_SHUT_RDWR);
906
errno = EIO;
907
792
goto mandos_end;
908
793
}
909
794
} else {
912
797
}
913
798
914
799
if(debug){
915
fprintf_plus(stderr, "Closing TLS session\n");
800
fprintf(stderr, "Closing TLS session\n");
916
801
}
917
802
918
803
if(quit_now){
919
errno = EINTR;
920
804
goto mandos_end;
921
805
}
922
806
923
807
do {
924
808
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
809
if(quit_now){
926
errno = EINTR;
927
810
goto mandos_end;
928
811
}
929
812
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
930
813
931
814
if(buffer_length > 0){
932
815
ssize_t decrypted_buffer_size;
933
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
817
buffer_length,
934
818
&decrypted_buffer);
935
819
if(decrypted_buffer_size >= 0){
936
820
937
821
written = 0;
938
822
while(written < (size_t) decrypted_buffer_size){
939
823
if(quit_now){
940
errno = EINTR;
941
824
goto mandos_end;
942
825
}
943
826
945
828
(size_t)decrypted_buffer_size - written,
946
829
stdout);
947
830
if(ret == 0 and ferror(stdout)){
948
int e = errno;
949
831
if(debug){
950
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
951
strerror(errno));
832
fprintf(stderr, "Error writing encrypted data: %s\n",
833
strerror(errno));
952
834
}
953
errno = e;
954
835
goto mandos_end;
955
836
}
956
837
written += (size_t)ret;
962
843
/* Shutdown procedure */
963
844
964
845
mandos_end:
965
{
966
int e = errno;
967
free(decrypted_buffer);
968
free(buffer);
969
if(tcp_sd >= 0){
970
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
971
}
972
if(ret == -1){
973
if(e == 0){
974
e = errno;
975
}
976
perror_plus("close");
977
}
978
gnutls_deinit(session);
979
errno = e;
980
if(quit_now){
981
errno = EINTR;
982
retval = -1;
983
}
846
free(decrypted_buffer);
847
free(buffer);
848
if(tcp_sd >= 0){
849
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
850
}
851
if(ret == -1){
852
perror("close");
853
}
854
gnutls_deinit(session);
855
if(quit_now){
856
retval = -1;
984
857
}
985
858
return retval;
986
859
}
1011
884
switch(event){
1012
885
default:
1013
886
case AVAHI_RESOLVER_FAILURE:
1014
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1015
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1016
domain,
1017
avahi_strerror(avahi_server_errno(mc.server)));
887
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
888
" of type '%s' in domain '%s': %s\n", name, type, domain,
889
avahi_strerror(avahi_server_errno(mc.server)));
1018
890
break;
1019
891
1020
892
case AVAHI_RESOLVER_FOUND:
1022
894
char ip[AVAHI_ADDRESS_STR_MAX];
1023
895
avahi_address_snprint(ip, sizeof(ip), address);
1024
896
if(debug){
1025
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1026
PRIdMAX ") on port %" PRIu16 "\n", name,
1027
host_name, ip, (intmax_t)interface, port);
897
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
898
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
899
ip, (intmax_t)interface, port);
1028
900
}
1029
901
int ret = start_mandos_communication(ip, port, interface,
1030
902
avahi_proto_to_af(proto));
1031
903
if(ret == 0){
1032
904
avahi_simple_poll_quit(mc.simple_poll);
1033
} else {
1034
if(not add_server(ip, port, interface,
1035
avahi_proto_to_af(proto))){
1036
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1037
" list\n", name);
1038
}
1039
905
}
1040
906
}
1041
907
}
1065
931
default:
1066
932
case AVAHI_BROWSER_FAILURE:
1067
933
1068
fprintf_plus(stderr, "(Avahi browser) %s\n",
1069
avahi_strerror(avahi_server_errno(mc.server)));
934
fprintf(stderr, "(Avahi browser) %s\n",
935
avahi_strerror(avahi_server_errno(mc.server)));
1070
936
avahi_simple_poll_quit(mc.simple_poll);
1071
937
return;
1072
938
1079
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1080
946
name, type, domain, protocol, 0,
1081
947
resolve_callback, NULL) == NULL)
1082
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1083
" %s\n", name,
1084
avahi_strerror(avahi_server_errno(mc.server)));
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
949
name, avahi_strerror(avahi_server_errno(mc.server)));
1085
950
break;
1086
951
1087
952
case AVAHI_BROWSER_REMOVE:
1090
955
case AVAHI_BROWSER_ALL_FOR_NOW:
1091
956
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1092
957
if(debug){
1093
fprintf_plus(stderr, "No Mandos server found, still"
1094
" searching...\n");
958
fprintf(stderr, "No Mandos server found, still searching...\n");
1095
959
}
1096
960
break;
1097
961
}
1098
962
}
1099
963
1100
/* Signal handler that stops main loop after SIGTERM */
964
/* stop main loop after sigterm has been called */
1101
965
static void handle_sigterm(int sig){
1102
966
if(quit_now){
1103
967
return;
1105
969
quit_now = 1;
1106
970
signal_received = sig;
1107
971
int old_errno = errno;
1108
/* set main loop to exit */
1109
972
if(mc.simple_poll != NULL){
1110
973
avahi_simple_poll_quit(mc.simple_poll);
1111
974
}
1112
975
errno = old_errno;
1113
976
}
1114
977
1115
bool get_flags(const char *ifname, struct ifreq *ifr){
1116
int ret;
1117
1118
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1119
if(s < 0){
1120
perror_plus("socket");
1121
return false;
1122
}
1123
strcpy(ifr->ifr_name, ifname);
1124
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1125
if(ret == -1){
1126
if(debug){
1127
perror_plus("ioctl SIOCGIFFLAGS");
1128
}
1129
return false;
1130
}
1131
return true;
1132
}
1133
1134
bool good_flags(const char *ifname, const struct ifreq *ifr){
1135
1136
/* Reject the loopback device */
1137
if(ifr->ifr_flags & IFF_LOOPBACK){
1138
if(debug){
1139
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1140
ifname);
1141
}
1142
return false;
1143
}
1144
/* Accept point-to-point devices only if connect_to is specified */
1145
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1146
if(debug){
1147
fprintf_plus(stderr, "Accepting point-to-point interface"
1148
" \"%s\"\n", ifname);
1149
}
1150
return true;
1151
}
1152
/* Otherwise, reject non-broadcast-capable devices */
1153
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1154
if(debug){
1155
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1156
" \"%s\"\n", ifname);
1157
}
1158
return false;
1159
}
1160
/* Reject non-ARP interfaces (including dummy interfaces) */
1161
if(ifr->ifr_flags & IFF_NOARP){
1162
if(debug){
1163
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1164
ifname);
1165
}
1166
return false;
1167
}
1168
1169
/* Accept this device */
1170
if(debug){
1171
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1172
}
1173
return true;
1174
}
1175
1176
/*
1177
* This function determines if a directory entry in /sys/class/net
1178
* corresponds to an acceptable network device.
1179
* (This function is passed to scandir(3) as a filter function.)
1180
*/
1181
int good_interface(const struct dirent *if_entry){
1182
if(if_entry->d_name[0] == '.'){
1183
return 0;
1184
}
1185
1186
struct ifreq ifr;
1187
if(not get_flags(if_entry->d_name, &ifr)){
1188
if(debug){
1189
fprintf_plus(stderr, "Failed to get flags for interface "
1190
"\"%s\"\n", if_entry->d_name);
1191
}
1192
return 0;
1193
}
1194
1195
if(not good_flags(if_entry->d_name, &ifr)){
1196
return 0;
1197
}
1198
return 1;
1199
}
1200
1201
/*
1202
* This function determines if a directory entry in /sys/class/net
1203
* corresponds to an acceptable network device which is up.
1204
* (This function is passed to scandir(3) as a filter function.)
1205
*/
1206
int up_interface(const struct dirent *if_entry){
1207
if(if_entry->d_name[0] == '.'){
1208
return 0;
1209
}
1210
1211
struct ifreq ifr;
1212
if(not get_flags(if_entry->d_name, &ifr)){
1213
if(debug){
1214
fprintf_plus(stderr, "Failed to get flags for interface "
1215
"\"%s\"\n", if_entry->d_name);
1216
}
1217
return 0;
1218
}
1219
1220
/* Reject down interfaces */
1221
if(not (ifr.ifr_flags & IFF_UP)){
1222
if(debug){
1223
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
if_entry->d_name);
1225
}
1226
return 0;
1227
}
1228
1229
/* Reject non-running interfaces */
1230
if(not (ifr.ifr_flags & IFF_RUNNING)){
1231
if(debug){
1232
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if_entry->d_name);
1234
}
1235
return 0;
1236
}
1237
1238
if(not good_flags(if_entry->d_name, &ifr)){
1239
return 0;
1240
}
1241
return 1;
1242
}
1243
1244
int notdotentries(const struct dirent *direntry){
1245
/* Skip "." and ".." */
1246
if(direntry->d_name[0] == '.'
1247
and (direntry->d_name[1] == '\0'
1248
or (direntry->d_name[1] == '.'
1249
and direntry->d_name[2] == '\0'))){
1250
return 0;
1251
}
1252
return 1;
1253
}
1254
1255
/* Is this directory entry a runnable program? */
1256
int runnable_hook(const struct dirent *direntry){
1257
int ret;
1258
size_t sret;
1259
struct stat st;
1260
1261
if((direntry->d_name)[0] == '\0'){
1262
/* Empty name? */
1263
return 0;
1264
}
1265
1266
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1267
"abcdefghijklmnopqrstuvwxyz"
1268
"0123456789"
1269
"_-");
1270
if((direntry->d_name)[sret] != '\0'){
1271
/* Contains non-allowed characters */
1272
if(debug){
1273
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1274
direntry->d_name);
1275
}
1276
return 0;
1277
}
1278
1279
char *fullname = NULL;
1280
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1281
if(ret < 0){
1282
perror_plus("asprintf");
1283
return 0;
1284
}
1285
1286
ret = stat(fullname, &st);
1287
if(ret == -1){
1288
if(debug){
1289
perror_plus("Could not stat hook");
1290
}
1291
return 0;
1292
}
1293
if(not (S_ISREG(st.st_mode))){
1294
/* Not a regular file */
1295
if(debug){
1296
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1297
direntry->d_name);
1298
}
1299
return 0;
1300
}
1301
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1302
/* Not executable */
1303
if(debug){
1304
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1305
direntry->d_name);
1306
}
1307
return 0;
1308
}
1309
if(debug){
1310
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1311
direntry->d_name);
1312
}
1313
return 1;
1314
}
1315
1316
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1317
int ret;
1318
struct timespec now;
1319
struct timespec waited_time;
1320
intmax_t block_time;
1321
1322
while(true){
1323
if(mc.current_server == NULL){
1324
if (debug){
1325
fprintf_plus(stderr, "Wait until first server is found."
1326
" No timeout!\n");
1327
}
1328
ret = avahi_simple_poll_iterate(s, -1);
1329
} else {
1330
if (debug){
1331
fprintf_plus(stderr, "Check current_server if we should run"
1332
" it, or wait\n");
1333
}
1334
/* the current time */
1335
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1336
if(ret == -1){
1337
perror_plus("clock_gettime");
1338
return -1;
1339
}
1340
/* Calculating in ms how long time between now and server
1341
who we visted longest time ago. Now - last seen. */
1342
waited_time.tv_sec = (now.tv_sec
1343
- mc.current_server->last_seen.tv_sec);
1344
waited_time.tv_nsec = (now.tv_nsec
1345
- mc.current_server->last_seen.tv_nsec);
1346
/* total time is 10s/10,000ms.
1347
Converting to s from ms by dividing by 1,000,
1348
and ns to ms by dividing by 1,000,000. */
1349
block_time = ((retry_interval
1350
- ((intmax_t)waited_time.tv_sec * 1000))
1351
- ((intmax_t)waited_time.tv_nsec / 1000000));
1352
1353
if (debug){
1354
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1355
block_time);
1356
}
1357
1358
if(block_time <= 0){
1359
ret = start_mandos_communication(mc.current_server->ip,
1360
mc.current_server->port,
1361
mc.current_server->if_index,
1362
mc.current_server->af);
1363
if(ret == 0){
1364
avahi_simple_poll_quit(mc.simple_poll);
1365
return 0;
1366
}
1367
ret = clock_gettime(CLOCK_MONOTONIC,
1368
&mc.current_server->last_seen);
1369
if(ret == -1){
1370
perror_plus("clock_gettime");
1371
return -1;
1372
}
1373
mc.current_server = mc.current_server->next;
1374
block_time = 0; /* Call avahi to find new Mandos
1375
servers, but don't block */
1376
}
1377
1378
ret = avahi_simple_poll_iterate(s, (int)block_time);
1379
}
1380
if(ret != 0){
1381
if (ret > 0 or errno != EINTR){
1382
return (ret != 1) ? ret : 0;
1383
}
1384
}
1385
}
1386
}
1387
1388
bool run_network_hooks(const char *mode, const char *interface,
1389
const float delay){
1390
struct dirent **direntries;
1391
struct dirent *direntry;
1392
int ret;
1393
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1394
alphasort);
1395
if(numhooks == -1){
1396
perror_plus("scandir");
1397
} else {
1398
int devnull = open("/dev/null", O_RDONLY);
1399
for(int i = 0; i < numhooks; i++){
1400
direntry = direntries[i];
1401
char *fullname = NULL;
1402
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1403
if(ret < 0){
1404
perror_plus("asprintf");
1405
continue;
1406
}
1407
if(debug){
1408
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1409
direntry->d_name);
1410
}
1411
pid_t hook_pid = fork();
1412
if(hook_pid == 0){
1413
/* Child */
1414
/* Raise privileges */
1415
errno = 0;
1416
ret = seteuid(0);
1417
if(ret == -1){
1418
perror_plus("seteuid");
1419
}
1420
/* Raise privileges even more */
1421
errno = 0;
1422
ret = setuid(0);
1423
if(ret == -1){
1424
perror_plus("setuid");
1425
}
1426
/* Set group */
1427
errno = 0;
1428
ret = setgid(0);
1429
if(ret == -1){
1430
perror_plus("setgid");
1431
}
1432
/* Reset supplementary groups */
1433
errno = 0;
1434
ret = setgroups(0, NULL);
1435
if(ret == -1){
1436
perror_plus("setgroups");
1437
}
1438
dup2(devnull, STDIN_FILENO);
1439
close(devnull);
1440
dup2(STDERR_FILENO, STDOUT_FILENO);
1441
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1442
if(ret == -1){
1443
perror_plus("setenv");
1444
_exit(EX_OSERR);
1445
}
1446
ret = setenv("DEVICE", interface, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("MODE", mode, 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
char *delaystring;
1462
ret = asprintf(&delaystring, "%f", delay);
1463
if(ret == -1){
1464
perror_plus("asprintf");
1465
_exit(EX_OSERR);
1466
}
1467
ret = setenv("DELAY", delaystring, 1);
1468
if(ret == -1){
1469
free(delaystring);
1470
perror_plus("setenv");
1471
_exit(EX_OSERR);
1472
}
1473
free(delaystring);
1474
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1475
perror_plus("execl");
1476
_exit(EXIT_FAILURE);
1477
}
1478
} else {
1479
int status;
1480
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1481
perror_plus("waitpid");
1482
free(fullname);
1483
continue;
1484
}
1485
if(WIFEXITED(status)){
1486
if(WEXITSTATUS(status) != 0){
1487
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1488
" with status %d\n", direntry->d_name,
1489
WEXITSTATUS(status));
1490
free(fullname);
1491
continue;
1492
}
1493
} else if(WIFSIGNALED(status)){
1494
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1495
" signal %d\n", direntry->d_name,
1496
WTERMSIG(status));
1497
free(fullname);
1498
continue;
1499
} else {
1500
fprintf_plus(stderr, "Warning: network hook \"%s\""
1501
" crashed\n", direntry->d_name);
1502
free(fullname);
1503
continue;
1504
}
1505
}
1506
free(fullname);
1507
if(debug){
1508
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1509
direntry->d_name);
1510
}
1511
}
1512
close(devnull);
1513
}
1514
return true;
1515
}
1516
1517
978
int main(int argc, char *argv[]){
1518
979
AvahiSServiceBrowser *sb = NULL;
1519
980
int error;
1521
982
intmax_t tmpmax;
1522
983
char *tmp;
1523
984
int exitcode = EXIT_SUCCESS;
1524
const char *interface = "";
985
const char *interface = "eth0";
1525
986
struct ifreq network;
1526
987
int sd = -1;
1527
988
bool take_down_interface = false;
1528
989
uid_t uid;
1529
990
gid_t gid;
991
char *connect_to = NULL;
1530
992
char tempdir[] = "/tmp/mandosXXXXXX";
1531
993
bool tempdir_created = false;
1532
994
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1536
998
bool gnutls_initialized = false;
1537
999
bool gpgme_initialized = false;
1538
1000
float delay = 2.5f;
1539
double retry_interval = 10; /* 10s between trying a server and
1540
retrying the same server again */
1541
1001
1542
1002
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1543
1003
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1549
1009
errno = 0;
1550
1010
ret = setgid(gid);
1551
1011
if(ret == -1){
1552
perror_plus("setgid");
1012
perror("setgid");
1553
1013
}
1554
1014
1555
1015
/* Lower user privileges (temporarily) */
1556
1016
errno = 0;
1557
1017
ret = seteuid(uid);
1558
1018
if(ret == -1){
1559
perror_plus("seteuid");
1019
perror("seteuid");
1560
1020
}
1561
1021
1562
1022
if(quit_now){
1597
1057
.arg = "SECONDS",
1598
1058
.doc = "Maximum delay to wait for interface startup",
1599
1059
.group = 2 },
1600
{ .name = "retry", .key = 132,
1601
.arg = "SECONDS",
1602
.doc = "Retry interval used when denied by the mandos server",
1603
.group = 2 },
1604
{ .name = "network-hook-dir", .key = 133,
1605
.arg = "DIR",
1606
.doc = "Directory where network hooks are located",
1607
.group = 2 },
1608
1060
/*
1609
1061
* These reproduce what we would get without ARGP_NO_HELP
1610
1062
*/
1654
1106
if(errno != 0 or tmp == arg or *tmp != '\0'){
1655
1107
argp_error(state, "Bad delay");
1656
1108
}
1657
case 132: /* --retry */
1658
errno = 0;
1659
retry_interval = strtod(arg, &tmp);
1660
if(errno != 0 or tmp == arg or *tmp != '\0'
1661
or (retry_interval * 1000) > INT_MAX
1662
or retry_interval < 0){
1663
argp_error(state, "Bad retry interval");
1664
}
1665
break;
1666
case 133: /* --network-hook-dir */
1667
hookdir = arg;
1668
1109
break;
1669
1110
/*
1670
1111
* These reproduce what we would get without ARGP_NO_HELP
1677
1118
argp_state_help(state, state->out_stream,
1678
1119
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1679
1120
case 'V': /* --version */
1680
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1681
1122
exit(argp_err_exit_status);
1682
1123
break;
1683
1124
default:
1698
1139
case ENOMEM:
1699
1140
default:
1700
1141
errno = ret;
1701
perror_plus("argp_parse");
1142
perror("argp_parse");
1702
1143
exitcode = EX_OSERR;
1703
1144
goto end;
1704
1145
case EINVAL:
1706
1147
goto end;
1707
1148
}
1708
1149
}
1709
1710
{
1711
/* Work around Debian bug #633582:
1712
<http://bugs.debian.org/633582> */
1713
1714
/* Re-raise priviliges */
1715
errno = 0;
1716
ret = seteuid(0);
1717
if(ret == -1){
1718
perror_plus("seteuid");
1719
} else {
1720
struct stat st;
1721
1722
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1723
int seckey_fd = open(seckey, O_RDONLY);
1724
if(seckey_fd == -1){
1725
perror_plus("open");
1726
} else {
1727
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1728
if(ret == -1){
1729
perror_plus("fstat");
1730
} else {
1731
if(S_ISREG(st.st_mode)
1732
and st.st_uid == 0 and st.st_gid == 0){
1733
ret = fchown(seckey_fd, uid, gid);
1734
if(ret == -1){
1735
perror_plus("fchown");
1736
}
1737
}
1738
}
1739
TEMP_FAILURE_RETRY(close(seckey_fd));
1740
}
1741
}
1742
1743
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1744
int pubkey_fd = open(pubkey, O_RDONLY);
1745
if(pubkey_fd == -1){
1746
perror_plus("open");
1747
} else {
1748
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1749
if(ret == -1){
1750
perror_plus("fstat");
1751
} else {
1752
if(S_ISREG(st.st_mode)
1753
and st.st_uid == 0 and st.st_gid == 0){
1754
ret = fchown(pubkey_fd, uid, gid);
1755
if(ret == -1){
1756
perror_plus("fchown");
1757
}
1758
}
1759
}
1760
TEMP_FAILURE_RETRY(close(pubkey_fd));
1761
}
1762
}
1763
1764
/* Lower privileges */
1765
errno = 0;
1766
ret = seteuid(uid);
1767
if(ret == -1){
1768
perror_plus("seteuid");
1769
}
1770
}
1771
}
1772
1773
/* Run network hooks */
1774
if(not run_network_hooks("start", interface, delay)){
1775
goto end;
1776
}
1777
1150
1778
1151
if(not debug){
1779
1152
avahi_set_log_function(empty_log);
1780
1153
}
1781
1154
1782
if(interface[0] == '\0'){
1783
struct dirent **direntries;
1784
/* First look for interfaces that are up */
1785
ret = scandir(sys_class_net, &direntries, up_interface,
1786
alphasort);
1787
if(ret == 0){
1788
/* No up interfaces, look for any good interfaces */
1789
free(direntries);
1790
ret = scandir(sys_class_net, &direntries, good_interface,
1791
alphasort);
1792
}
1793
if(ret >= 1){
1794
/* Pick the first interface returned */
1795
interface = strdup(direntries[0]->d_name);
1796
if(debug){
1797
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1798
}
1799
if(interface == NULL){
1800
perror_plus("malloc");
1801
free(direntries);
1802
exitcode = EXIT_FAILURE;
1803
goto end;
1804
}
1805
free(direntries);
1806
} else {
1807
free(direntries);
1808
fprintf_plus(stderr, "Could not find a network interface\n");
1809
exitcode = EXIT_FAILURE;
1810
goto end;
1811
}
1812
}
1813
1814
1155
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1815
1156
from the signal handler */
1816
1157
/* Initialize the pseudo-RNG for Avahi */
1817
1158
srand((unsigned int) time(NULL));
1818
1159
mc.simple_poll = avahi_simple_poll_new();
1819
1160
if(mc.simple_poll == NULL){
1820
fprintf_plus(stderr,
1821
"Avahi: Failed to create simple poll object.\n");
1822
exitcode = EX_UNAVAILABLE;
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
1823
1163
goto end;
1824
1164
}
1825
1165
1826
1166
sigemptyset(&sigterm_action.sa_mask);
1827
1167
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1828
1168
if(ret == -1){
1829
perror_plus("sigaddset");
1830
exitcode = EX_OSERR;
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
1831
1171
goto end;
1832
1172
}
1833
1173
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1834
1174
if(ret == -1){
1835
perror_plus("sigaddset");
1836
exitcode = EX_OSERR;
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
1837
1177
goto end;
1838
1178
}
1839
1179
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1840
1180
if(ret == -1){
1841
perror_plus("sigaddset");
1842
exitcode = EX_OSERR;
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
1843
1183
goto end;
1844
1184
}
1845
1185
/* Need to check if the handler is SIG_IGN before handling:
1848
1188
*/
1849
1189
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1850
1190
if(ret == -1){
1851
perror_plus("sigaction");
1852
return EX_OSERR;
1191
perror("sigaction");
1192
return EXIT_FAILURE;
1853
1193
}
1854
1194
if(old_sigterm_action.sa_handler != SIG_IGN){
1855
1195
ret = sigaction(SIGINT, &sigterm_action, NULL);
1856
1196
if(ret == -1){
1857
perror_plus("sigaction");
1858
exitcode = EX_OSERR;
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1859
1199
goto end;
1860
1200
}
1861
1201
}
1862
1202
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1863
1203
if(ret == -1){
1864
perror_plus("sigaction");
1865
return EX_OSERR;
1204
perror("sigaction");
1205
return EXIT_FAILURE;
1866
1206
}
1867
1207
if(old_sigterm_action.sa_handler != SIG_IGN){
1868
1208
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1869
1209
if(ret == -1){
1870
perror_plus("sigaction");
1871
exitcode = EX_OSERR;
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
1872
1212
goto end;
1873
1213
}
1874
1214
}
1875
1215
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1876
1216
if(ret == -1){
1877
perror_plus("sigaction");
1878
return EX_OSERR;
1217
perror("sigaction");
1218
return EXIT_FAILURE;
1879
1219
}
1880
1220
if(old_sigterm_action.sa_handler != SIG_IGN){
1881
1221
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1882
1222
if(ret == -1){
1883
perror_plus("sigaction");
1884
exitcode = EX_OSERR;
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1885
1225
goto end;
1886
1226
}
1887
1227
}
1888
1228
1889
1229
/* If the interface is down, bring it up */
1890
if(strcmp(interface, "none") != 0){
1230
if(interface[0] != '\0'){
1891
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1892
1232
if(if_index == 0){
1893
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1894
exitcode = EX_UNAVAILABLE;
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1234
exitcode = EXIT_FAILURE;
1895
1235
goto end;
1896
1236
}
1897
1237
1903
1243
errno = 0;
1904
1244
ret = seteuid(0);
1905
1245
if(ret == -1){
1906
perror_plus("seteuid");
1246
perror("seteuid");
1907
1247
}
1908
1248
1909
1249
#ifdef __linux__
1913
1253
bool restore_loglevel = true;
1914
1254
if(ret == -1){
1915
1255
restore_loglevel = false;
1916
perror_plus("klogctl");
1256
perror("klogctl");
1917
1257
}
1918
1258
#endif /* __linux__ */
1919
1259
1920
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1921
1261
if(sd < 0){
1922
perror_plus("socket");
1923
exitcode = EX_OSERR;
1262
perror("socket");
1263
exitcode = EXIT_FAILURE;
1924
1264
#ifdef __linux__
1925
1265
if(restore_loglevel){
1926
1266
ret = klogctl(7, NULL, 0);
1927
1267
if(ret == -1){
1928
perror_plus("klogctl");
1268
perror("klogctl");
1929
1269
}
1930
1270
}
1931
1271
#endif /* __linux__ */
1933
1273
errno = 0;
1934
1274
ret = seteuid(uid);
1935
1275
if(ret == -1){
1936
perror_plus("seteuid");
1276
perror("seteuid");
1937
1277
}
1938
1278
goto end;
1939
1279
}
1940
1280
strcpy(network.ifr_name, interface);
1941
1281
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1942
1282
if(ret == -1){
1943
perror_plus("ioctl SIOCGIFFLAGS");
1283
perror("ioctl SIOCGIFFLAGS");
1944
1284
#ifdef __linux__
1945
1285
if(restore_loglevel){
1946
1286
ret = klogctl(7, NULL, 0);
1947
1287
if(ret == -1){
1948
perror_plus("klogctl");
1288
perror("klogctl");
1949
1289
}
1950
1290
}
1951
1291
#endif /* __linux__ */
1952
exitcode = EX_OSERR;
1292
exitcode = EXIT_FAILURE;
1953
1293
/* Lower privileges */
1954
1294
errno = 0;
1955
1295
ret = seteuid(uid);
1956
1296
if(ret == -1){
1957
perror_plus("seteuid");
1297
perror("seteuid");
1958
1298
}
1959
1299
goto end;
1960
1300
}
1964
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1965
1305
if(ret == -1){
1966
1306
take_down_interface = false;
1967
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1968
exitcode = EX_OSERR;
1307
perror("ioctl SIOCSIFFLAGS");
1308
exitcode = EXIT_FAILURE;
1969
1309
#ifdef __linux__
1970
1310
if(restore_loglevel){
1971
1311
ret = klogctl(7, NULL, 0);
1972
1312
if(ret == -1){
1973
perror_plus("klogctl");
1313
perror("klogctl");
1974
1314
}
1975
1315
}
1976
1316
#endif /* __linux__ */
1978
1318
errno = 0;
1979
1319
ret = seteuid(uid);
1980
1320
if(ret == -1){
1981
perror_plus("seteuid");
1321
perror("seteuid");
1982
1322
}
1983
1323
goto end;
1984
1324
}
1985
1325
}
1986
/* Sleep checking until interface is running.
1987
Check every 0.25s, up to total time of delay */
1326
/* sleep checking until interface is running */
1988
1327
for(int i=0; i < delay * 4; i++){
1989
1328
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1990
1329
if(ret == -1){
1991
perror_plus("ioctl SIOCGIFFLAGS");
1330
perror("ioctl SIOCGIFFLAGS");
1992
1331
} else if(network.ifr_flags & IFF_RUNNING){
1993
1332
break;
1994
1333
}
1995
1334
struct timespec sleeptime = { .tv_nsec = 250000000 };
1996
1335
ret = nanosleep(&sleeptime, NULL);
1997
1336
if(ret == -1 and errno != EINTR){
1998
perror_plus("nanosleep");
1337
perror("nanosleep");
1999
1338
}
2000
1339
}
2001
1340
if(not take_down_interface){
2002
1341
/* We won't need the socket anymore */
2003
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2004
1343
if(ret == -1){
2005
perror_plus("close");
1344
perror("close");
2006
1345
}
2007
1346
}
2008
1347
#ifdef __linux__
2010
1349
/* Restores kernel loglevel to default */
2011
1350
ret = klogctl(7, NULL, 0);
2012
1351
if(ret == -1){
2013
perror_plus("klogctl");
1352
perror("klogctl");
2014
1353
}
2015
1354
}
2016
1355
#endif /* __linux__ */
2017
1356
/* Lower privileges */
2018
1357
errno = 0;
2019
/* Lower privileges */
2020
ret = seteuid(uid);
2021
if(ret == -1){
2022
perror_plus("seteuid");
1358
if(take_down_interface){
1359
/* Lower privileges */
1360
ret = seteuid(uid);
1361
if(ret == -1){
1362
perror("seteuid");
1363
}
1364
} else {
1365
/* Lower privileges permanently */
1366
ret = setuid(uid);
1367
if(ret == -1){
1368
perror("setuid");
1369
}
2023
1370
}
2024
1371
}
2025
1372
2029
1376
2030
1377
ret = init_gnutls_global(pubkey, seckey);
2031
1378
if(ret == -1){
2032
fprintf_plus(stderr, "init_gnutls_global failed\n");
2033
exitcode = EX_UNAVAILABLE;
1379
fprintf(stderr, "init_gnutls_global failed\n");
1380
exitcode = EXIT_FAILURE;
2034
1381
goto end;
2035
1382
} else {
2036
1383
gnutls_initialized = true;
2040
1387
goto end;
2041
1388
}
2042
1389
1390
tempdir_created = true;
2043
1391
if(mkdtemp(tempdir) == NULL){
2044
perror_plus("mkdtemp");
1392
tempdir_created = false;
1393
perror("mkdtemp");
2045
1394
goto end;
2046
1395
}
2047
tempdir_created = true;
2048
1396
2049
1397
if(quit_now){
2050
1398
goto end;
2051
1399
}
2052
1400
2053
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
2054
fprintf_plus(stderr, "init_gpgme failed\n");
2055
exitcode = EX_UNAVAILABLE;
1402
fprintf(stderr, "init_gpgme failed\n");
1403
exitcode = EXIT_FAILURE;
2056
1404
goto end;
2057
1405
} else {
2058
1406
gpgme_initialized = true;
2067
1415
/* (Mainly meant for debugging) */
2068
1416
char *address = strrchr(connect_to, ':');
2069
1417
if(address == NULL){
2070
fprintf_plus(stderr, "No colon in address\n");
2071
exitcode = EX_USAGE;
1418
fprintf(stderr, "No colon in address\n");
1419
exitcode = EXIT_FAILURE;
2072
1420
goto end;
2073
1421
}
2074
1422
2081
1429
tmpmax = strtoimax(address+1, &tmp, 10);
2082
1430
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2083
1431
or tmpmax != (uint16_t)tmpmax){
2084
fprintf_plus(stderr, "Bad port number\n");
2085
exitcode = EX_USAGE;
1432
fprintf(stderr, "Bad port number\n");
1433
exitcode = EXIT_FAILURE;
2086
1434
goto end;
2087
1435
}
2088
1436
2092
1440
2093
1441
port = (uint16_t)tmpmax;
2094
1442
*address = '\0';
1443
address = connect_to;
2095
1444
/* Colon in address indicates IPv6 */
2096
1445
int af;
2097
if(strchr(connect_to, ':') != NULL){
1446
if(strchr(address, ':') != NULL){
2098
1447
af = AF_INET6;
2099
/* Accept [] around IPv6 address - see RFC 5952 */
2100
if(connect_to[0] == '[' and address[-1] == ']')
2101
{
2102
connect_to++;
2103
address[-1] = '\0';
2104
}
2105
1448
} else {
2106
1449
af = AF_INET;
2107
1450
}
2108
address = connect_to;
2109
1451
2110
1452
if(quit_now){
2111
1453
goto end;
2112
1454
}
2113
1455
2114
while(not quit_now){
2115
ret = start_mandos_communication(address, port, if_index, af);
2116
if(quit_now or ret == 0){
2117
break;
2118
}
2119
if(debug){
2120
fprintf_plus(stderr, "Retrying in %d seconds\n",
2121
(int)retry_interval);
2122
}
2123
sleep((int)retry_interval);
2124
}
2125
2126
if (not quit_now){
1456
ret = start_mandos_communication(address, port, if_index, af);
1457
if(ret < 0){
1458
exitcode = EXIT_FAILURE;
1459
} else {
2127
1460
exitcode = EXIT_SUCCESS;
2128
1461
}
2129
2130
1462
goto end;
2131
1463
}
2132
1464
2154
1486
2155
1487
/* Check if creating the Avahi server object succeeded */
2156
1488
if(mc.server == NULL){
2157
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2158
avahi_strerror(error));
2159
exitcode = EX_UNAVAILABLE;
1489
fprintf(stderr, "Failed to create Avahi server: %s\n",
1490
avahi_strerror(error));
1491
exitcode = EXIT_FAILURE;
2160
1492
goto end;
2161
1493
}
2162
1494
2169
1501
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2170
1502
NULL, 0, browse_callback, NULL);
2171
1503
if(sb == NULL){
2172
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2174
exitcode = EX_UNAVAILABLE;
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1505
avahi_strerror(avahi_server_errno(mc.server)));
1506
exitcode = EXIT_FAILURE;
2175
1507
goto end;
2176
1508
}
2177
1509
2182
1514
/* Run the main loop */
2183
1515
2184
1516
if(debug){
2185
fprintf_plus(stderr, "Starting Avahi loop search\n");
2186
}
2187
2188
ret = avahi_loop_with_timeout(mc.simple_poll,
2189
(int)(retry_interval * 1000));
2190
if(debug){
2191
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2192
(ret == 0) ? "successfully" : "with error");
2193
}
1517
fprintf(stderr, "Starting Avahi loop search\n");
1518
}
1519
1520
avahi_simple_poll_loop(mc.simple_poll);
2194
1521
2195
1522
end:
2196
1523
2197
1524
if(debug){
2198
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1525
fprintf(stderr, "%s exiting\n", argv[0]);
2199
1526
}
2200
1527
2201
1528
/* Cleanup things */
2218
1545
gpgme_release(mc.ctx);
2219
1546
}
2220
1547
2221
/* Cleans up the circular linked list of Mandos servers the client
2222
has seen */
2223
if(mc.current_server != NULL){
2224
mc.current_server->prev->next = NULL;
2225
while(mc.current_server != NULL){
2226
server *next = mc.current_server->next;
2227
free(mc.current_server);
2228
mc.current_server = next;
2229
}
2230
}
2231
2232
/* Run network hooks */
2233
run_network_hooks("stop", interface, delay);
2234
2235
/* Re-raise priviliges */
2236
{
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
2237
1551
errno = 0;
2238
1552
ret = seteuid(0);
2239
1553
if(ret == -1){
2240
perror_plus("seteuid");
1554
perror("seteuid");
2241
1555
}
2242
2243
/* Take down the network interface */
2244
if(take_down_interface and geteuid() == 0){
1556
if(geteuid() == 0){
2245
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2246
1558
if(ret == -1){
2247
perror_plus("ioctl SIOCGIFFLAGS");
2248
} else if(network.ifr_flags & IFF_UP){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
2249
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2250
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2251
1563
if(ret == -1){
2252
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1564
perror("ioctl SIOCSIFFLAGS");
2253
1565
}
2254
1566
}
2255
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2256
1568
if(ret == -1){
2257
perror_plus("close");
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
2258
1576
}
2259
1577
}
2260
1578
}
2261
/* Lower privileges permanently */
2262
errno = 0;
2263
ret = setuid(uid);
2264
if(ret == -1){
2265
perror_plus("setuid");
2266
}
2267
1579
2268
/* Removes the GPGME temp directory and all files inside */
1580
/* Removes the temp directory used by GPGME */
2269
1581
if(tempdir_created){
2270
struct dirent **direntries = NULL;
2271
struct dirent *direntry = NULL;
2272
int numentries = scandir(tempdir, &direntries, notdotentries,
2273
alphasort);
2274
if (numentries > 0){
2275
for(int i = 0; i < numentries; i++){
2276
direntry = direntries[i];
1582
DIR *d;
1583
struct dirent *direntry;
1584
d = opendir(tempdir);
1585
if(d == NULL){
1586
if(errno != ENOENT){
1587
perror("opendir");
1588
}
1589
} else {
1590
while(true){
1591
direntry = readdir(d);
1592
if(direntry == NULL){
1593
break;
1594
}
1595
/* Skip "." and ".." */
1596
if(direntry->d_name[0] == '.'
1597
and (direntry->d_name[1] == '\0'
1598
or (direntry->d_name[1] == '.'
1599
and direntry->d_name[2] == '\0'))){
1600
continue;
1601
}
2277
1602
char *fullname = NULL;
2278
1603
ret = asprintf(&fullname, "%s/%s", tempdir,
2279
1604
direntry->d_name);
2280
1605
if(ret < 0){
2281
perror_plus("asprintf");
1606
perror("asprintf");
2282
1607
continue;
2283
1608
}
2284
1609
ret = remove(fullname);
2285
1610
if(ret == -1){
2286
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2287
strerror(errno));
1611
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1612
strerror(errno));
2288
1613
}
2289
1614
free(fullname);
2290
1615
}
2291
}
2292
2293
/* need to clean even if 0 because man page doesn't specify */
2294
free(direntries);
2295
if (numentries == -1){
2296
perror_plus("scandir");
1616
closedir(d);
2297
1617
}
2298
1618
ret = rmdir(tempdir);
2299
1619
if(ret == -1 and errno != ENOENT){
2300
perror_plus("rmdir");
1620
perror("rmdir");
2301
1621
}
2302
1622
}
2303
1623
2308
1628
&old_sigterm_action,
2309
1629
NULL));
2310
1630
if(ret == -1){
2311
perror_plus("sigaction");
1631
perror("sigaction");
2312
1632
}
2313
1633
do {
2314
1634
ret = raise(signal_received);
2315
1635
} while(ret != 0 and errno == EINTR);
2316
1636
if(ret != 0){
2317
perror_plus("raise");
1637
perror("raise");
2318
1638
abort();
2319
1639
}
2320
1640
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0