To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 505.3.6
- compare with another revision
- download diff
- download tarball
- view history from revision 505.3.6
- Committer: teddy at bsnet
- Date: 2011-11-13 13:55:45 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@fukt.bsnet.se-20111113135545-hyb59g1q2icwdcte
* plugins.d/mandos-client.c: Some white space fixes.
(runnable_hook): Simplify name rule. More debug messages.
(runnable_hook): Simplify name rule. More debug messages.
- files removed:
- debian/mandos-client.examples
- 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 © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect(),
59
getnameinfo() */
58
inet_pton(), connect() */
60
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
63
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
63
strtoimax() */
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno,
66
66
program_invocation_short_name */
67
67
#include <time.h> /* nanosleep(), time(), sleep() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
76
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
80
80
argp_state, struct argp,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
#include <argz.h> /* argz_add_sep(), argz_next(),
92
argz_delete(), argz_append(),
93
argz_stringify(), argz_add(),
94
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
97
90
98
91
#ifdef __linux__
99
92
#include <sys/klog.h> /* klogctl() */
141
134
static const char sys_class_net[] = "/sys/class/net";
142
135
char *connect_to = NULL;
143
136
const char *hookdir = HOOKDIR;
144
uid_t uid = 65534;
145
gid_t gid = 65534;
146
137
147
138
/* Doubly linked list that need to be circularly linked when used */
148
139
typedef struct server{
149
140
const char *ip;
150
in_port_t port;
141
uint16_t port;
151
142
AvahiIfIndex if_index;
152
143
int af;
153
144
struct timespec last_seen;
157
148
158
149
/* Used for passing in values through the Avahi callback functions */
159
150
typedef struct {
151
AvahiSimplePoll *simple_poll;
160
152
AvahiServer *server;
161
153
gnutls_certificate_credentials_t cred;
162
154
unsigned int dh_bits;
164
156
const char *priority;
165
157
gpgme_ctx_t ctx;
166
158
server *current_server;
167
char *interfaces;
168
size_t interfaces_size;
169
159
} mandos_context;
170
160
171
/* global so signal handler can reach it*/
172
AvahiSimplePoll *simple_poll;
161
/* global context so signal handler can reach it*/
162
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
173
166
174
167
sig_atomic_t quit_now = 0;
175
168
int signal_received = 0;
176
169
177
170
/* Function to use when printing errors */
178
171
void perror_plus(const char *print_text){
179
int e = errno;
180
172
fprintf(stderr, "Mandos plugin %s: ",
181
173
program_invocation_short_name);
182
errno = e;
183
174
perror(print_text);
184
175
}
185
176
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
187
int fprintf_plus(FILE *stream, const char *format, ...){
188
va_list ap;
189
va_start (ap, format);
190
191
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
192
program_invocation_short_name));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
194
}
195
196
177
/*
197
178
* Make additional room in "buffer" for at least BUFFER_SIZE more
198
179
* bytes. "buffer_capacity" is how much is currently allocated,
199
180
* "buffer_length" is how much is already used.
200
181
*/
201
__attribute__((nonnull, warn_unused_result))
202
182
size_t incbuffer(char **buffer, size_t buffer_length,
203
183
size_t buffer_capacity){
204
184
if(buffer_length + BUFFER_SIZE > buffer_capacity){
205
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
206
if(new_buf == NULL){
207
int old_errno = errno;
208
free(*buffer);
209
errno = old_errno;
210
*buffer = NULL;
185
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
186
if(buffer == NULL){
211
187
return 0;
212
188
}
213
*buffer = new_buf;
214
189
buffer_capacity += BUFFER_SIZE;
215
190
}
216
191
return buffer_capacity;
217
192
}
218
193
219
194
/* Add server to set of servers to retry periodically */
220
__attribute__((nonnull, warn_unused_result))
221
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
222
int af, server **current_server){
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
223
197
int ret;
224
198
server *new_server = malloc(sizeof(server));
225
199
if(new_server == NULL){
226
200
perror_plus("malloc");
227
return false;
201
return -1;
228
202
}
229
203
*new_server = (server){ .ip = strdup(ip),
230
204
.port = port,
232
206
.af = af };
233
207
if(new_server->ip == NULL){
234
208
perror_plus("strdup");
235
return false;
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
209
return -1;
241
210
}
242
211
/* Special case of first server */
243
if(*current_server == NULL){
212
if (mc.current_server == NULL){
244
213
new_server->next = new_server;
245
214
new_server->prev = new_server;
246
*current_server = new_server;
215
mc.current_server = new_server;
216
/* Place the new server last in the list */
247
217
} else {
248
/* Place the new server last in the list */
249
new_server->next = *current_server;
250
new_server->prev = (*current_server)->prev;
218
new_server->next = mc.current_server;
219
new_server->prev = mc.current_server->prev;
251
220
new_server->prev->next = new_server;
252
(*current_server)->prev = new_server;
253
}
254
return true;
221
mc.current_server->prev = new_server;
222
}
223
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
224
if(ret == -1){
225
perror_plus("clock_gettime");
226
return -1;
227
}
228
return 0;
255
229
}
256
230
257
231
/*
258
232
* Initialize GPGME.
259
233
*/
260
__attribute__((nonnull, warn_unused_result))
261
234
static bool init_gpgme(const char *seckey, const char *pubkey,
262
const char *tempdir, mandos_context *mc){
235
const char *tempdir){
263
236
gpgme_error_t rc;
264
237
gpgme_engine_info_t engine_info;
265
238
239
266
240
/*
267
241
* Helper function to insert pub and seckey to the engine keyring.
268
242
*/
279
253
280
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
281
255
if(rc != GPG_ERR_NO_ERROR){
282
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
284
259
return false;
285
260
}
286
261
287
rc = gpgme_op_import(mc->ctx, pgp_data);
262
rc = gpgme_op_import(mc.ctx, pgp_data);
288
263
if(rc != GPG_ERR_NO_ERROR){
289
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
291
267
return false;
292
268
}
293
269
300
276
}
301
277
302
278
if(debug){
303
fprintf_plus(stderr, "Initializing GPGME\n");
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
304
281
}
305
282
306
283
/* Init GPGME */
307
284
gpgme_check_version(NULL);
308
285
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
309
286
if(rc != GPG_ERR_NO_ERROR){
310
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
312
290
return false;
313
291
}
314
292
315
293
/* Set GPGME home directory for the OpenPGP engine only */
316
294
rc = gpgme_get_engine_info(&engine_info);
317
295
if(rc != GPG_ERR_NO_ERROR){
318
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
319
gpgme_strsource(rc), gpgme_strerror(rc));
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
320
299
return false;
321
300
}
322
301
while(engine_info != NULL){
328
307
engine_info = engine_info->next;
329
308
}
330
309
if(engine_info == NULL){
331
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
332
tempdir);
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
333
312
return false;
334
313
}
335
314
336
315
/* Create new GPGME "context" */
337
rc = gpgme_new(&(mc->ctx));
316
rc = gpgme_new(&(mc.ctx));
338
317
if(rc != GPG_ERR_NO_ERROR){
339
fprintf_plus(stderr, "Mandos plugin mandos-client: "
340
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
341
gpgme_strerror(rc));
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
342
321
return false;
343
322
}
344
323
353
332
* Decrypt OpenPGP data.
354
333
* Returns -1 on error
355
334
*/
356
__attribute__((nonnull, warn_unused_result))
357
335
static ssize_t pgp_packet_decrypt(const char *cryptotext,
358
336
size_t crypto_size,
359
char **plaintext,
360
mandos_context *mc){
337
char **plaintext){
361
338
gpgme_data_t dh_crypto, dh_plain;
362
339
gpgme_error_t rc;
363
340
ssize_t ret;
365
342
ssize_t plaintext_length = 0;
366
343
367
344
if(debug){
368
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
369
347
}
370
348
371
349
/* Create new GPGME data buffer from memory cryptotext */
372
350
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
373
351
0);
374
352
if(rc != GPG_ERR_NO_ERROR){
375
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
377
356
return -1;
378
357
}
379
358
380
359
/* Create new empty GPGME data buffer for the plaintext */
381
360
rc = gpgme_data_new(&dh_plain);
382
361
if(rc != GPG_ERR_NO_ERROR){
383
fprintf_plus(stderr, "Mandos plugin mandos-client: "
384
"bad gpgme_data_new: %s: %s\n",
385
gpgme_strsource(rc), gpgme_strerror(rc));
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
386
365
gpgme_data_release(dh_crypto);
387
366
return -1;
388
367
}
389
368
390
369
/* Decrypt data from the cryptotext data buffer to the plaintext
391
370
data buffer */
392
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
393
372
if(rc != GPG_ERR_NO_ERROR){
394
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
395
gpgme_strsource(rc), gpgme_strerror(rc));
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
396
376
plaintext_length = -1;
397
377
if(debug){
398
378
gpgme_decrypt_result_t result;
399
result = gpgme_op_decrypt_result(mc->ctx);
379
result = gpgme_op_decrypt_result(mc.ctx);
400
380
if(result == NULL){
401
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
402
383
} else {
403
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
404
result->unsupported_algorithm);
405
fprintf_plus(stderr, "Wrong key usage: %u\n",
406
result->wrong_key_usage);
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
407
390
if(result->file_name != NULL){
408
fprintf_plus(stderr, "File name: %s\n", result->file_name);
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
409
393
}
410
394
gpgme_recipient_t recipient;
411
395
recipient = result->recipients;
412
396
while(recipient != NULL){
413
fprintf_plus(stderr, "Public key algorithm: %s\n",
414
gpgme_pubkey_algo_name
415
(recipient->pubkey_algo));
416
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
417
fprintf_plus(stderr, "Secret key available: %s\n",
418
recipient->status == GPG_ERR_NO_SECKEY
419
? "No" : "Yes");
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
420
406
recipient = recipient->next;
421
407
}
422
408
}
425
411
}
426
412
427
413
if(debug){
428
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
429
416
}
430
417
431
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
462
449
}
463
450
464
451
if(debug){
465
fprintf_plus(stderr, "Decrypted password is: ");
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
466
454
for(ssize_t i = 0; i < plaintext_length; i++){
467
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
468
456
}
479
467
return plaintext_length;
480
468
}
481
469
482
__attribute__((warn_unused_result))
483
static const char *safer_gnutls_strerror(int value){
484
const char *ret = gnutls_strerror(value);
470
static const char * safer_gnutls_strerror(int value){
471
const char *ret = gnutls_strerror(value); /* Spurious warning from
472
-Wunreachable-code */
485
473
if(ret == NULL)
486
474
ret = "(unknown)";
487
475
return ret;
488
476
}
489
477
490
478
/* GnuTLS log function callback */
491
__attribute__((nonnull))
492
479
static void debuggnutls(__attribute__((unused)) int level,
493
480
const char* string){
494
fprintf_plus(stderr, "GnuTLS: %s", string);
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
495
482
}
496
483
497
__attribute__((nonnull, warn_unused_result))
498
484
static int init_gnutls_global(const char *pubkeyfilename,
499
const char *seckeyfilename,
500
mandos_context *mc){
485
const char *seckeyfilename){
501
486
int ret;
502
487
503
488
if(debug){
504
fprintf_plus(stderr, "Initializing GnuTLS\n");
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
505
491
}
506
492
507
493
ret = gnutls_global_init();
508
494
if(ret != GNUTLS_E_SUCCESS){
509
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
510
safer_gnutls_strerror(ret));
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
511
497
return -1;
512
498
}
513
499
520
506
}
521
507
522
508
/* OpenPGP credentials */
523
ret = gnutls_certificate_allocate_credentials(&mc->cred);
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
524
510
if(ret != GNUTLS_E_SUCCESS){
525
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
526
safer_gnutls_strerror(ret));
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
527
513
gnutls_global_deinit();
528
514
return -1;
529
515
}
530
516
531
517
if(debug){
532
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
533
" secret key %s as GnuTLS credentials\n",
534
pubkeyfilename,
535
seckeyfilename);
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
536
522
}
537
523
538
524
ret = gnutls_certificate_set_openpgp_key_file
539
(mc->cred, pubkeyfilename, seckeyfilename,
525
(mc.cred, pubkeyfilename, seckeyfilename,
540
526
GNUTLS_OPENPGP_FMT_BASE64);
541
527
if(ret != GNUTLS_E_SUCCESS){
542
fprintf_plus(stderr,
543
"Error[%d] while reading the OpenPGP key pair ('%s',"
544
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
545
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
546
safer_gnutls_strerror(ret));
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
547
534
goto globalfail;
548
535
}
549
536
550
537
/* GnuTLS server initialization */
551
ret = gnutls_dh_params_init(&mc->dh_params);
538
ret = gnutls_dh_params_init(&mc.dh_params);
552
539
if(ret != GNUTLS_E_SUCCESS){
553
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
554
" initialization: %s\n",
555
safer_gnutls_strerror(ret));
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
556
543
goto globalfail;
557
544
}
558
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
545
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
559
546
if(ret != GNUTLS_E_SUCCESS){
560
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
561
safer_gnutls_strerror(ret));
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
562
550
goto globalfail;
563
551
}
564
552
565
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
553
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
566
554
567
555
return 0;
568
556
569
557
globalfail:
570
558
571
gnutls_certificate_free_credentials(mc->cred);
559
gnutls_certificate_free_credentials(mc.cred);
572
560
gnutls_global_deinit();
573
gnutls_dh_params_deinit(mc->dh_params);
561
gnutls_dh_params_deinit(mc.dh_params);
574
562
return -1;
575
563
}
576
564
577
__attribute__((nonnull, warn_unused_result))
578
static int init_gnutls_session(gnutls_session_t *session,
579
mandos_context *mc){
565
static int init_gnutls_session(gnutls_session_t *session){
580
566
int ret;
581
567
/* GnuTLS session creation */
582
568
do {
586
572
}
587
573
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
588
574
if(ret != GNUTLS_E_SUCCESS){
589
fprintf_plus(stderr,
590
"Error in GnuTLS session initialization: %s\n",
591
safer_gnutls_strerror(ret));
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
592
578
}
593
579
594
580
{
595
581
const char *err;
596
582
do {
597
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
583
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
598
584
if(quit_now){
599
585
gnutls_deinit(*session);
600
586
return -1;
601
587
}
602
588
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
603
589
if(ret != GNUTLS_E_SUCCESS){
604
fprintf_plus(stderr, "Syntax error at: %s\n", err);
605
fprintf_plus(stderr, "GnuTLS error: %s\n",
606
safer_gnutls_strerror(ret));
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
607
594
gnutls_deinit(*session);
608
595
return -1;
609
596
}
611
598
612
599
do {
613
600
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
614
mc->cred);
601
mc.cred);
615
602
if(quit_now){
616
603
gnutls_deinit(*session);
617
604
return -1;
618
605
}
619
606
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
620
607
if(ret != GNUTLS_E_SUCCESS){
621
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
622
safer_gnutls_strerror(ret));
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
623
611
gnutls_deinit(*session);
624
612
return -1;
625
613
}
627
615
/* ignore client certificate if any. */
628
616
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
629
617
630
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
618
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
631
619
632
620
return 0;
633
621
}
637
625
__attribute__((unused)) const char *txt){}
638
626
639
627
/* Called when a Mandos server is found */
640
__attribute__((nonnull, warn_unused_result))
641
static int start_mandos_communication(const char *ip, in_port_t port,
628
static int start_mandos_communication(const char *ip, uint16_t port,
642
629
AvahiIfIndex if_index,
643
int af, mandos_context *mc){
630
int af){
644
631
int ret, tcp_sd = -1;
645
632
ssize_t sret;
646
struct sockaddr_storage to;
633
union {
634
struct sockaddr_in in;
635
struct sockaddr_in6 in6;
636
} to;
647
637
char *buffer = NULL;
648
638
char *decrypted_buffer = NULL;
649
639
size_t buffer_length = 0;
668
658
pf = PF_INET;
669
659
break;
670
660
default:
671
fprintf_plus(stderr, "Bad address family: %d\n", af);
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
672
663
errno = EINVAL;
673
664
return -1;
674
665
}
675
666
676
/* If the interface is specified and we have a list of interfaces */
677
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
678
/* Check if the interface is one of the interfaces we are using */
679
bool match = false;
680
{
681
char *interface = NULL;
682
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
683
interface))){
684
if(if_nametoindex(interface) == (unsigned int)if_index){
685
match = true;
686
break;
687
}
688
}
689
}
690
if(not match){
691
/* This interface does not match any in the list, so we don't
692
connect to the server */
693
if(debug){
694
char interface[IF_NAMESIZE];
695
if(if_indextoname((unsigned int)if_index, interface) == NULL){
696
perror_plus("if_indextoname");
697
} else {
698
fprintf_plus(stderr, "Skipping server on non-used interface"
699
" \"%s\"\n",
700
if_indextoname((unsigned int)if_index,
701
interface));
702
}
703
}
704
return -1;
705
}
706
}
707
708
ret = init_gnutls_session(&session, mc);
667
ret = init_gnutls_session(&session);
709
668
if(ret != 0){
710
669
return -1;
711
670
}
712
671
713
672
if(debug){
714
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
715
PRIuMAX "\n", ip, (uintmax_t)port);
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
716
676
}
717
677
718
678
tcp_sd = socket(pf, SOCK_STREAM, 0);
730
690
731
691
memset(&to, 0, sizeof(to));
732
692
if(af == AF_INET6){
733
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
734
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
693
to.in6.sin6_family = (sa_family_t)af;
694
ret = inet_pton(af, ip, &to.in6.sin6_addr);
735
695
} else { /* IPv4 */
736
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
737
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
696
to.in.sin_family = (sa_family_t)af;
697
ret = inet_pton(af, ip, &to.in.sin_addr);
738
698
}
739
699
if(ret < 0 ){
740
700
int e = errno;
744
704
}
745
705
if(ret == 0){
746
706
int e = errno;
747
fprintf_plus(stderr, "Bad address: %s\n", ip);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
748
709
errno = e;
749
710
goto mandos_end;
750
711
}
751
712
if(af == AF_INET6){
752
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
753
if(IN6_IS_ADDR_LINKLOCAL
754
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
713
to.in6.sin6_port = htons(port); /* Spurious warnings from
714
-Wconversion and
715
-Wunreachable-code */
716
717
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
-Wunreachable-code*/
755
720
if(if_index == AVAHI_IF_UNSPEC){
756
fprintf_plus(stderr, "An IPv6 link-local address is"
757
" incomplete without a network interface\n");
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
758
724
errno = EINVAL;
759
725
goto mandos_end;
760
726
}
761
727
/* Set the network interface number as scope */
762
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
728
to.in6.sin6_scope_id = (uint32_t)if_index;
763
729
}
764
730
} else {
765
((struct sockaddr_in *)&to)->sin_port = htons(port);
731
to.in.sin_port = htons(port); /* Spurious warnings from
732
-Wconversion and
733
-Wunreachable-code */
766
734
}
767
735
768
736
if(quit_now){
776
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
777
745
perror_plus("if_indextoname");
778
746
} else {
779
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
780
"\n", ip, interface, (uintmax_t)port);
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
781
750
}
782
751
} else {
783
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
784
ip, (uintmax_t)port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
785
754
}
786
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
787
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
757
const char *pcret;
788
758
if(af == AF_INET6){
789
ret = getnameinfo((struct sockaddr *)&to,
790
sizeof(struct sockaddr_in6),
791
addrstr, sizeof(addrstr), NULL, 0,
792
NI_NUMERICHOST);
759
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
760
sizeof(addrstr));
793
761
} else {
794
ret = getnameinfo((struct sockaddr *)&to,
795
sizeof(struct sockaddr_in),
796
addrstr, sizeof(addrstr), NULL, 0,
797
NI_NUMERICHOST);
762
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
763
sizeof(addrstr));
798
764
}
799
if(ret == EAI_SYSTEM){
800
perror_plus("getnameinfo");
801
} else if(ret != 0) {
802
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
803
} else if(strcmp(addrstr, ip) != 0){
804
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
765
if(pcret == NULL){
766
perror_plus("inet_ntop");
767
} else {
768
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
771
}
805
772
}
806
773
}
807
774
811
778
}
812
779
813
780
if(af == AF_INET6){
814
ret = connect(tcp_sd, (struct sockaddr *)&to,
815
sizeof(struct sockaddr_in6));
781
ret = connect(tcp_sd, &to.in6, sizeof(to));
816
782
} else {
817
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
818
sizeof(struct sockaddr_in));
783
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
819
784
}
820
785
if(ret < 0){
821
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
786
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
822
787
int e = errno;
823
788
perror_plus("connect");
824
789
errno = e;
862
827
}
863
828
864
829
if(debug){
865
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
866
832
}
867
833
868
834
if(quit_now){
870
836
goto mandos_end;
871
837
}
872
838
873
/* This casting via intptr_t is to eliminate warning about casting
874
an int to a pointer type. This is exactly how the GnuTLS Guile
875
function "set-session-transport-fd!" does it. */
876
gnutls_transport_set_ptr(session,
877
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
839
/* Spurious warning from -Wint-to-pointer-cast */
840
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
878
841
879
842
if(quit_now){
880
843
errno = EINTR;
891
854
892
855
if(ret != GNUTLS_E_SUCCESS){
893
856
if(debug){
894
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
895
859
gnutls_perror(ret);
896
860
}
897
861
errno = EPROTO;
901
865
/* Read OpenPGP packet that contains the wanted password */
902
866
903
867
if(debug){
904
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
905
" %s\n", ip);
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
906
870
}
907
871
908
872
while(true){
946
910
}
947
911
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
948
912
if(ret < 0){
949
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
950
"***\n");
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
951
915
gnutls_perror(ret);
952
916
errno = EPROTO;
953
917
goto mandos_end;
954
918
}
955
919
break;
956
920
default:
957
fprintf_plus(stderr, "Unknown error while reading data from"
958
" encrypted session with Mandos server\n");
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
959
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
960
925
errno = EIO;
961
926
goto mandos_end;
966
931
}
967
932
968
933
if(debug){
969
fprintf_plus(stderr, "Closing TLS session\n");
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
970
936
}
971
937
972
938
if(quit_now){
985
951
if(buffer_length > 0){
986
952
ssize_t decrypted_buffer_size;
987
953
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
988
&decrypted_buffer, mc);
954
&decrypted_buffer);
989
955
if(decrypted_buffer_size >= 0){
990
956
991
957
written = 0;
1001
967
if(ret == 0 and ferror(stdout)){
1002
968
int e = errno;
1003
969
if(debug){
1004
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1005
strerror(errno));
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
972
strerror(errno));
1006
973
}
1007
974
errno = e;
1008
975
goto mandos_end;
1039
1006
return retval;
1040
1007
}
1041
1008
1042
__attribute__((nonnull))
1043
1009
static void resolve_callback(AvahiSServiceResolver *r,
1044
1010
AvahiIfIndex interface,
1045
1011
AvahiProtocol proto,
1053
1019
AVAHI_GCC_UNUSED AvahiStringList *txt,
1054
1020
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1055
1021
flags,
1056
void *mc){
1057
if(r == NULL){
1058
return;
1059
}
1022
AVAHI_GCC_UNUSED void* userdata){
1023
assert(r);
1060
1024
1061
1025
/* Called whenever a service has been resolved successfully or
1062
1026
timed out */
1068
1032
switch(event){
1069
1033
default:
1070
1034
case AVAHI_RESOLVER_FAILURE:
1071
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1072
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1073
domain,
1074
avahi_strerror(avahi_server_errno
1075
(((mandos_context*)mc)->server)));
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
1037
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
avahi_strerror(avahi_server_errno(mc.server)));
1076
1039
break;
1077
1040
1078
1041
case AVAHI_RESOLVER_FOUND:
1080
1043
char ip[AVAHI_ADDRESS_STR_MAX];
1081
1044
avahi_address_snprint(ip, sizeof(ip), address);
1082
1045
if(debug){
1083
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1084
PRIdMAX ") on port %" PRIu16 "\n", name,
1085
host_name, ip, (intmax_t)interface, port);
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1048
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
ip, (intmax_t)interface, port);
1086
1050
}
1087
int ret = start_mandos_communication(ip, (in_port_t)port,
1088
interface,
1089
avahi_proto_to_af(proto),
1090
mc);
1051
int ret = start_mandos_communication(ip, port, interface,
1052
avahi_proto_to_af(proto));
1091
1053
if(ret == 0){
1092
avahi_simple_poll_quit(simple_poll);
1054
avahi_simple_poll_quit(mc.simple_poll);
1093
1055
} else {
1094
if(not add_server(ip, (in_port_t)port, interface,
1095
avahi_proto_to_af(proto),
1096
&((mandos_context*)mc)->current_server)){
1097
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1098
" list\n", name);
1099
}
1056
ret = add_server(ip, port, interface,
1057
avahi_proto_to_af(proto));
1100
1058
}
1101
1059
}
1102
1060
}
1112
1070
const char *domain,
1113
1071
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1114
1072
flags,
1115
void *mc){
1116
if(b == NULL){
1117
return;
1118
}
1073
AVAHI_GCC_UNUSED void* userdata){
1074
assert(b);
1119
1075
1120
1076
/* Called whenever a new services becomes available on the LAN or
1121
1077
is removed from the LAN */
1128
1084
default:
1129
1085
case AVAHI_BROWSER_FAILURE:
1130
1086
1131
fprintf_plus(stderr, "(Avahi browser) %s\n",
1132
avahi_strerror(avahi_server_errno
1133
(((mandos_context*)mc)->server)));
1134
avahi_simple_poll_quit(simple_poll);
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1089
avahi_strerror(avahi_server_errno(mc.server)));
1090
avahi_simple_poll_quit(mc.simple_poll);
1135
1091
return;
1136
1092
1137
1093
case AVAHI_BROWSER_NEW:
1140
1096
the callback function is called the Avahi server will free the
1141
1097
resolver for us. */
1142
1098
1143
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1144
interface, protocol, name, type,
1145
domain, protocol, 0,
1146
resolve_callback, mc) == NULL)
1147
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1148
" %s\n", name,
1149
avahi_strerror(avahi_server_errno
1150
(((mandos_context*)mc)->server)));
1099
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1100
name, type, domain, protocol, 0,
1101
resolve_callback, NULL) == NULL)
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1104
name, avahi_strerror(avahi_server_errno(mc.server)));
1151
1105
break;
1152
1106
1153
1107
case AVAHI_BROWSER_REMOVE:
1156
1110
case AVAHI_BROWSER_ALL_FOR_NOW:
1157
1111
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1158
1112
if(debug){
1159
fprintf_plus(stderr, "No Mandos server found, still"
1160
" searching...\n");
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1161
1115
}
1162
1116
break;
1163
1117
}
1172
1126
signal_received = sig;
1173
1127
int old_errno = errno;
1174
1128
/* set main loop to exit */
1175
if(simple_poll != NULL){
1176
avahi_simple_poll_quit(simple_poll);
1129
if(mc.simple_poll != NULL){
1130
avahi_simple_poll_quit(mc.simple_poll);
1177
1131
}
1178
1132
errno = old_errno;
1179
1133
}
1180
1134
1181
__attribute__((nonnull, warn_unused_result))
1182
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1183
1136
int ret;
1184
error_t ret_errno;
1185
1137
1186
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1187
1139
if(s < 0){
1188
ret_errno = errno;
1189
1140
perror_plus("socket");
1190
errno = ret_errno;
1191
1141
return false;
1192
1142
}
1193
1143
strcpy(ifr->ifr_name, ifname);
1194
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1195
1145
if(ret == -1){
1196
1146
if(debug){
1197
ret_errno = errno;
1198
1147
perror_plus("ioctl SIOCGIFFLAGS");
1199
errno = ret_errno;
1200
1148
}
1201
1149
return false;
1202
1150
}
1203
1151
return true;
1204
1152
}
1205
1153
1206
__attribute__((nonnull, warn_unused_result))
1207
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1208
1155
1209
1156
/* Reject the loopback device */
1210
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1211
1158
if(debug){
1212
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1213
ifname);
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1214
1161
}
1215
1162
return false;
1216
1163
}
1217
1164
/* Accept point-to-point devices only if connect_to is specified */
1218
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1219
1166
if(debug){
1220
fprintf_plus(stderr, "Accepting point-to-point interface"
1221
" \"%s\"\n", ifname);
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1222
1169
}
1223
1170
return true;
1224
1171
}
1225
1172
/* Otherwise, reject non-broadcast-capable devices */
1226
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1227
1174
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1229
" \"%s\"\n", ifname);
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1230
1177
}
1231
1178
return false;
1232
1179
}
1233
1180
/* Reject non-ARP interfaces (including dummy interfaces) */
1234
1181
if(ifr->ifr_flags & IFF_NOARP){
1235
1182
if(debug){
1236
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1237
ifname);
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1238
1185
}
1239
1186
return false;
1240
1187
}
1241
1188
1242
1189
/* Accept this device */
1243
1190
if(debug){
1244
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1245
1193
}
1246
1194
return true;
1247
1195
}
1251
1199
* corresponds to an acceptable network device.
1252
1200
* (This function is passed to scandir(3) as a filter function.)
1253
1201
*/
1254
__attribute__((nonnull, warn_unused_result))
1255
1202
int good_interface(const struct dirent *if_entry){
1256
1203
if(if_entry->d_name[0] == '.'){
1257
1204
return 0;
1260
1207
struct ifreq ifr;
1261
1208
if(not get_flags(if_entry->d_name, &ifr)){
1262
1209
if(debug){
1263
fprintf_plus(stderr, "Failed to get flags for interface "
1264
"\"%s\"\n", if_entry->d_name);
1265
}
1266
return 0;
1267
}
1268
1269
if(not good_flags(if_entry->d_name, &ifr)){
1270
return 0;
1271
}
1272
return 1;
1273
}
1274
1275
/*
1276
* This function determines if a network interface is up.
1277
*/
1278
__attribute__((nonnull, warn_unused_result))
1279
bool interface_is_up(const char *interface){
1280
struct ifreq ifr;
1281
if(not get_flags(interface, &ifr)){
1282
if(debug){
1283
fprintf_plus(stderr, "Failed to get flags for interface "
1284
"\"%s\"\n", interface);
1285
}
1286
return false;
1287
}
1288
1289
return (bool)(ifr.ifr_flags & IFF_UP);
1290
}
1291
1292
/*
1293
* This function determines if a network interface is running
1294
*/
1295
__attribute__((nonnull, warn_unused_result))
1296
bool interface_is_running(const char *interface){
1297
struct ifreq ifr;
1298
if(not get_flags(interface, &ifr)){
1299
if(debug){
1300
fprintf_plus(stderr, "Failed to get flags for interface "
1301
"\"%s\"\n", interface);
1302
}
1303
return false;
1304
}
1305
1306
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1307
}
1308
1309
__attribute__((nonnull, pure, warn_unused_result))
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1227
*/
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1230
return 0;
1231
}
1232
1233
struct ifreq ifr;
1234
if(not get_flags(if_entry->d_name, &ifr)){
1235
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1239
}
1240
return 0;
1241
}
1242
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1245
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1259
}
1260
return 0;
1261
}
1262
1263
if(not good_flags(if_entry->d_name, &ifr)){
1264
return 0;
1265
}
1266
return 1;
1267
}
1268
1310
1269
int notdotentries(const struct dirent *direntry){
1311
1270
/* Skip "." and ".." */
1312
1271
if(direntry->d_name[0] == '.'
1319
1278
}
1320
1279
1321
1280
/* Is this directory entry a runnable program? */
1322
__attribute__((nonnull, warn_unused_result))
1323
1281
int runnable_hook(const struct dirent *direntry){
1324
1282
int ret;
1325
1283
size_t sret;
1337
1295
if((direntry->d_name)[sret] != '\0'){
1338
1296
/* Contains non-allowed characters */
1339
1297
if(debug){
1340
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1341
direntry->d_name);
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1342
1301
}
1343
1302
return 0;
1344
1303
}
1360
1319
if(not (S_ISREG(st.st_mode))){
1361
1320
/* Not a regular file */
1362
1321
if(debug){
1363
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1364
direntry->d_name);
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1365
1325
}
1366
1326
return 0;
1367
1327
}
1368
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1369
1329
/* Not executable */
1370
1330
if(debug){
1371
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1372
direntry->d_name);
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1373
1334
}
1374
1335
return 0;
1375
1336
}
1376
if(debug){
1377
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1378
direntry->d_name);
1379
}
1380
1337
return 1;
1381
1338
}
1382
1339
1383
__attribute__((nonnull, warn_unused_result))
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1385
mandos_context *mc){
1340
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1386
1341
int ret;
1387
1342
struct timespec now;
1388
1343
struct timespec waited_time;
1389
1344
intmax_t block_time;
1390
1345
1391
1346
while(true){
1392
if(mc->current_server == NULL){
1393
if(debug){
1394
fprintf_plus(stderr, "Wait until first server is found."
1395
" No timeout!\n");
1347
if(mc.current_server == NULL){
1348
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1396
1351
}
1397
1352
ret = avahi_simple_poll_iterate(s, -1);
1398
1353
} else {
1399
if(debug){
1400
fprintf_plus(stderr, "Check current_server if we should run"
1401
" it, or wait\n");
1354
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1402
1358
}
1403
1359
/* the current time */
1404
1360
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1409
1365
/* Calculating in ms how long time between now and server
1410
1366
who we visted longest time ago. Now - last seen. */
1411
1367
waited_time.tv_sec = (now.tv_sec
1412
- mc->current_server->last_seen.tv_sec);
1368
- mc.current_server->last_seen.tv_sec);
1413
1369
waited_time.tv_nsec = (now.tv_nsec
1414
- mc->current_server->last_seen.tv_nsec);
1370
- mc.current_server->last_seen.tv_nsec);
1415
1371
/* total time is 10s/10,000ms.
1416
1372
Converting to s from ms by dividing by 1,000,
1417
1373
and ns to ms by dividing by 1,000,000. */
1419
1375
- ((intmax_t)waited_time.tv_sec * 1000))
1420
1376
- ((intmax_t)waited_time.tv_nsec / 1000000));
1421
1377
1422
if(debug){
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1424
block_time);
1378
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1425
1381
}
1426
1382
1427
1383
if(block_time <= 0){
1428
ret = start_mandos_communication(mc->current_server->ip,
1429
mc->current_server->port,
1430
mc->current_server->if_index,
1431
mc->current_server->af, mc);
1384
ret = start_mandos_communication(mc.current_server->ip,
1385
mc.current_server->port,
1386
mc.current_server->if_index,
1387
mc.current_server->af);
1432
1388
if(ret == 0){
1433
avahi_simple_poll_quit(s);
1389
avahi_simple_poll_quit(mc.simple_poll);
1434
1390
return 0;
1435
1391
}
1436
1392
ret = clock_gettime(CLOCK_MONOTONIC,
1437
&mc->current_server->last_seen);
1393
&mc.current_server->last_seen);
1438
1394
if(ret == -1){
1439
1395
perror_plus("clock_gettime");
1440
1396
return -1;
1441
1397
}
1442
mc->current_server = mc->current_server->next;
1398
mc.current_server = mc.current_server->next;
1443
1399
block_time = 0; /* Call avahi to find new Mandos
1444
1400
servers, but don't block */
1445
1401
}
1447
1403
ret = avahi_simple_poll_iterate(s, (int)block_time);
1448
1404
}
1449
1405
if(ret != 0){
1450
if(ret > 0 or errno != EINTR){
1406
if (ret > 0 or errno != EINTR){
1451
1407
return (ret != 1) ? ret : 0;
1452
1408
}
1453
1409
}
1454
1410
}
1455
1411
}
1456
1412
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
error_t raise_privileges(void){
1460
error_t old_errno = errno;
1461
error_t ret_errno = 0;
1462
if(seteuid(0) == -1){
1463
ret_errno = errno;
1464
perror_plus("seteuid");
1465
}
1466
errno = old_errno;
1467
return ret_errno;
1468
}
1469
1470
/* Set effective and real user ID to 0. Return errno. */
1471
__attribute__((warn_unused_result))
1472
error_t raise_privileges_permanently(void){
1473
error_t old_errno = errno;
1474
error_t ret_errno = raise_privileges();
1475
if(ret_errno != 0){
1476
errno = old_errno;
1477
return ret_errno;
1478
}
1479
if(setuid(0) == -1){
1480
ret_errno = errno;
1481
perror_plus("seteuid");
1482
}
1483
errno = old_errno;
1484
return ret_errno;
1485
}
1486
1487
/* Set effective user ID to unprivileged saved user ID */
1488
__attribute__((warn_unused_result))
1489
error_t lower_privileges(void){
1490
error_t old_errno = errno;
1491
error_t ret_errno = 0;
1492
if(seteuid(uid) == -1){
1493
ret_errno = errno;
1494
perror_plus("seteuid");
1495
}
1496
errno = old_errno;
1497
return ret_errno;
1498
}
1499
1500
/* Lower privileges permanently */
1501
__attribute__((warn_unused_result))
1502
error_t lower_privileges_permanently(void){
1503
error_t old_errno = errno;
1504
error_t ret_errno = 0;
1505
if(setuid(uid) == -1){
1506
ret_errno = errno;
1507
perror_plus("setuid");
1508
}
1509
errno = old_errno;
1510
return ret_errno;
1511
}
1512
1513
__attribute__((nonnull))
1514
void run_network_hooks(const char *mode, const char *interface,
1515
const float delay){
1516
struct dirent **direntries;
1517
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1518
alphasort);
1519
if(numhooks == -1){
1520
if(errno == ENOENT){
1521
if(debug){
1522
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1523
" found\n", hookdir);
1524
}
1525
} else {
1526
perror_plus("scandir");
1527
}
1528
} else {
1529
struct dirent *direntry;
1530
int ret;
1531
int devnull = open("/dev/null", O_RDONLY);
1532
for(int i = 0; i < numhooks; i++){
1533
direntry = direntries[i];
1534
char *fullname = NULL;
1535
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1536
if(ret < 0){
1537
perror_plus("asprintf");
1538
continue;
1539
}
1540
if(debug){
1541
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1542
direntry->d_name);
1543
}
1544
pid_t hook_pid = fork();
1545
if(hook_pid == 0){
1546
/* Child */
1547
/* Raise privileges */
1548
if(raise_privileges_permanently() != 0){
1549
perror_plus("Failed to raise privileges");
1550
_exit(EX_NOPERM);
1551
}
1552
/* Set group */
1553
errno = 0;
1554
ret = setgid(0);
1555
if(ret == -1){
1556
perror_plus("setgid");
1557
_exit(EX_NOPERM);
1558
}
1559
/* Reset supplementary groups */
1560
errno = 0;
1561
ret = setgroups(0, NULL);
1562
if(ret == -1){
1563
perror_plus("setgroups");
1564
_exit(EX_NOPERM);
1565
}
1566
ret = dup2(devnull, STDIN_FILENO);
1567
if(ret == -1){
1568
perror_plus("dup2(devnull, STDIN_FILENO)");
1569
_exit(EX_OSERR);
1570
}
1571
ret = close(devnull);
1572
if(ret == -1){
1573
perror_plus("close");
1574
_exit(EX_OSERR);
1575
}
1576
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1577
if(ret == -1){
1578
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1579
_exit(EX_OSERR);
1580
}
1581
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1582
if(ret == -1){
1583
perror_plus("setenv");
1584
_exit(EX_OSERR);
1585
}
1586
ret = setenv("DEVICE", interface, 1);
1587
if(ret == -1){
1588
perror_plus("setenv");
1589
_exit(EX_OSERR);
1590
}
1591
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1592
if(ret == -1){
1593
perror_plus("setenv");
1594
_exit(EX_OSERR);
1595
}
1596
ret = setenv("MODE", mode, 1);
1597
if(ret == -1){
1598
perror_plus("setenv");
1599
_exit(EX_OSERR);
1600
}
1601
char *delaystring;
1602
ret = asprintf(&delaystring, "%f", (double)delay);
1603
if(ret == -1){
1604
perror_plus("asprintf");
1605
_exit(EX_OSERR);
1606
}
1607
ret = setenv("DELAY", delaystring, 1);
1608
if(ret == -1){
1609
free(delaystring);
1610
perror_plus("setenv");
1611
_exit(EX_OSERR);
1612
}
1613
free(delaystring);
1614
if(connect_to != NULL){
1615
ret = setenv("CONNECT", connect_to, 1);
1616
if(ret == -1){
1617
perror_plus("setenv");
1618
_exit(EX_OSERR);
1619
}
1620
}
1621
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1622
perror_plus("execl");
1623
_exit(EXIT_FAILURE);
1624
}
1625
} else {
1626
int status;
1627
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1628
perror_plus("waitpid");
1629
free(fullname);
1630
continue;
1631
}
1632
if(WIFEXITED(status)){
1633
if(WEXITSTATUS(status) != 0){
1634
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1635
" with status %d\n", direntry->d_name,
1636
WEXITSTATUS(status));
1637
free(fullname);
1638
continue;
1639
}
1640
} else if(WIFSIGNALED(status)){
1641
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1642
" signal %d\n", direntry->d_name,
1643
WTERMSIG(status));
1644
free(fullname);
1645
continue;
1646
} else {
1647
fprintf_plus(stderr, "Warning: network hook \"%s\""
1648
" crashed\n", direntry->d_name);
1649
free(fullname);
1650
continue;
1651
}
1652
}
1653
free(fullname);
1654
if(debug){
1655
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1656
direntry->d_name);
1657
}
1658
}
1659
close(devnull);
1660
}
1661
}
1662
1663
__attribute__((nonnull, warn_unused_result))
1664
error_t bring_up_interface(const char *const interface,
1665
const float delay){
1666
error_t old_errno = errno;
1667
int ret;
1668
struct ifreq network;
1669
unsigned int if_index = if_nametoindex(interface);
1670
if(if_index == 0){
1671
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1672
errno = old_errno;
1673
return ENXIO;
1674
}
1675
1676
if(quit_now){
1677
errno = old_errno;
1678
return EINTR;
1679
}
1680
1681
if(not interface_is_up(interface)){
1682
error_t ret_errno = 0, ioctl_errno = 0;
1683
if(not get_flags(interface, &network)){
1684
ret_errno = errno;
1685
fprintf_plus(stderr, "Failed to get flags for interface "
1686
"\"%s\"\n", interface);
1687
errno = old_errno;
1688
return ret_errno;
1689
}
1690
network.ifr_flags |= IFF_UP; /* set flag */
1691
1692
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1693
if(sd == -1){
1694
ret_errno = errno;
1695
perror_plus("socket");
1696
errno = old_errno;
1697
return ret_errno;
1698
}
1699
1700
if(quit_now){
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1702
if(ret == -1){
1703
perror_plus("close");
1704
}
1705
errno = old_errno;
1706
return EINTR;
1707
}
1708
1709
if(debug){
1710
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1711
interface);
1712
}
1713
1714
/* Raise privileges */
1715
ret_errno = raise_privileges();
1716
bool restore_loglevel = false;
1717
if(ret_errno != 0){
1718
perror_plus("Failed to raise privileges");
1719
}
1720
#ifdef __linux__
1721
int ret_linux;
1722
if(ret_errno == 0){
1723
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1724
messages about the network interface to mess up the prompt */
1725
ret_linux = klogctl(8, NULL, 5);
1726
if(ret_linux == -1){
1727
perror_plus("klogctl");
1728
} else {
1729
restore_loglevel = true;
1730
}
1731
}
1732
#endif /* __linux__ */
1733
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1734
ioctl_errno = errno;
1735
#ifdef __linux__
1736
if(restore_loglevel){
1737
ret_linux = klogctl(7, NULL, 0);
1738
if(ret_linux == -1){
1739
perror_plus("klogctl");
1740
}
1741
}
1742
#endif /* __linux__ */
1743
1744
/* If raise_privileges() succeeded above */
1745
if(ret_errno == 0){
1746
/* Lower privileges */
1747
ret_errno = lower_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to lower privileges");
1751
}
1752
}
1753
1754
/* Close the socket */
1755
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1756
if(ret == -1){
1757
perror_plus("close");
1758
}
1759
1760
if(ret_setflags == -1){
1761
errno = ioctl_errno;
1762
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1763
errno = old_errno;
1764
return ioctl_errno;
1765
}
1766
} else if(debug){
1767
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1768
interface);
1769
}
1770
1771
/* Sleep checking until interface is running.
1772
Check every 0.25s, up to total time of delay */
1773
for(int i=0; i < delay * 4; i++){
1774
if(interface_is_running(interface)){
1775
break;
1776
}
1777
struct timespec sleeptime = { .tv_nsec = 250000000 };
1778
ret = nanosleep(&sleeptime, NULL);
1779
if(ret == -1 and errno != EINTR){
1780
perror_plus("nanosleep");
1781
}
1782
}
1783
1784
errno = old_errno;
1785
return 0;
1786
}
1787
1788
__attribute__((nonnull, warn_unused_result))
1789
error_t take_down_interface(const char *const interface){
1790
error_t old_errno = errno;
1791
struct ifreq network;
1792
unsigned int if_index = if_nametoindex(interface);
1793
if(if_index == 0){
1794
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1795
errno = old_errno;
1796
return ENXIO;
1797
}
1798
if(interface_is_up(interface)){
1799
error_t ret_errno = 0, ioctl_errno = 0;
1800
if(not get_flags(interface, &network) and debug){
1801
ret_errno = errno;
1802
fprintf_plus(stderr, "Failed to get flags for interface "
1803
"\"%s\"\n", interface);
1804
errno = old_errno;
1805
return ret_errno;
1806
}
1807
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1808
1809
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1810
if(sd == -1){
1811
ret_errno = errno;
1812
perror_plus("socket");
1813
errno = old_errno;
1814
return ret_errno;
1815
}
1816
1817
if(debug){
1818
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1819
interface);
1820
}
1821
1822
/* Raise privileges */
1823
ret_errno = raise_privileges();
1824
if(ret_errno != 0){
1825
perror_plus("Failed to raise privileges");
1826
}
1827
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1828
ioctl_errno = errno;
1829
1830
/* If raise_privileges() succeeded above */
1831
if(ret_errno == 0){
1832
/* Lower privileges */
1833
ret_errno = lower_privileges();
1834
if(ret_errno != 0){
1835
errno = ret_errno;
1836
perror_plus("Failed to lower privileges");
1837
}
1838
}
1839
1840
/* Close the socket */
1841
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1842
if(ret == -1){
1843
perror_plus("close");
1844
}
1845
1846
if(ret_setflags == -1){
1847
errno = ioctl_errno;
1848
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1849
errno = old_errno;
1850
return ioctl_errno;
1851
}
1852
} else if(debug){
1853
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1854
interface);
1855
}
1856
1857
errno = old_errno;
1858
return 0;
1859
}
1860
1861
1413
int main(int argc, char *argv[]){
1862
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1863
.priority = "SECURE256:!CTYPE-X.509:"
1864
"+CTYPE-OPENPGP", .current_server = NULL,
1865
.interfaces = NULL, .interfaces_size = 0 };
1866
1414
AvahiSServiceBrowser *sb = NULL;
1867
error_t ret_errno;
1415
int error;
1868
1416
int ret;
1869
1417
intmax_t tmpmax;
1870
1418
char *tmp;
1871
1419
int exitcode = EXIT_SUCCESS;
1872
char *interfaces_to_take_down = NULL;
1873
size_t interfaces_to_take_down_size = 0;
1420
const char *interface = "";
1421
struct ifreq network;
1422
int sd = -1;
1423
bool take_down_interface = false;
1424
uid_t uid;
1425
gid_t gid;
1874
1426
char tempdir[] = "/tmp/mandosXXXXXX";
1875
1427
bool tempdir_created = false;
1876
1428
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1877
1429
const char *seckey = PATHDIR "/" SECKEY;
1878
1430
const char *pubkey = PATHDIR "/" PUBKEY;
1879
char *interfaces_hooks = NULL;
1880
1431
1881
1432
bool gnutls_initialized = false;
1882
1433
bool gpgme_initialized = false;
1944
1495
.group = 2 },
1945
1496
{ .name = "retry", .key = 132,
1946
1497
.arg = "SECONDS",
1947
.doc = "Retry interval used when denied by the Mandos server",
1498
.doc = "Retry interval used when denied by the mandos server",
1948
1499
.group = 2 },
1949
1500
{ .name = "network-hook-dir", .key = 133,
1950
1501
.arg = "DIR",
1973
1524
connect_to = arg;
1974
1525
break;
1975
1526
case 'i': /* --interface */
1976
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1977
arg, (int)',');
1978
if(ret_errno != 0){
1979
argp_error(state, "%s", strerror(ret_errno));
1980
}
1527
interface = arg;
1981
1528
break;
1982
1529
case 's': /* --seckey */
1983
1530
seckey = arg;
2026
1573
argp_state_help(state, state->out_stream,
2027
1574
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2028
1575
case 'V': /* --version */
2029
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1576
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1577
fprintf(state->out_stream, "%s\n", argp_program_version);
2030
1578
exit(argp_err_exit_status);
2031
1579
break;
2032
1580
default:
2059
1607
{
2060
1608
/* Work around Debian bug #633582:
2061
1609
<http://bugs.debian.org/633582> */
2062
2063
/* Re-raise privileges */
2064
ret_errno = raise_privileges();
2065
if(ret_errno != 0){
2066
errno = ret_errno;
2067
perror_plus("Failed to raise privileges");
1610
struct stat st;
1611
1612
/* Re-raise priviliges */
1613
errno = 0;
1614
ret = seteuid(0);
1615
if(ret == -1){
1616
perror_plus("seteuid");
1617
}
1618
1619
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1620
int seckey_fd = open(seckey, O_RDONLY);
1621
if(seckey_fd == -1){
1622
perror_plus("open");
1623
} else {
1624
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1625
if(ret == -1){
1626
perror_plus("fstat");
1627
} else {
1628
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1629
ret = fchown(seckey_fd, uid, gid);
1630
if(ret == -1){
1631
perror_plus("fchown");
1632
}
1633
}
1634
}
1635
TEMP_FAILURE_RETRY(close(seckey_fd));
1636
}
1637
}
1638
1639
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1640
int pubkey_fd = open(pubkey, O_RDONLY);
1641
if(pubkey_fd == -1){
1642
perror_plus("open");
1643
} else {
1644
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1645
if(ret == -1){
1646
perror_plus("fstat");
1647
} else {
1648
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1649
ret = fchown(pubkey_fd, uid, gid);
1650
if(ret == -1){
1651
perror_plus("fchown");
1652
}
1653
}
1654
}
1655
TEMP_FAILURE_RETRY(close(pubkey_fd));
1656
}
1657
}
1658
1659
/* Lower privileges */
1660
errno = 0;
1661
ret = seteuid(uid);
1662
if(ret == -1){
1663
perror_plus("seteuid");
1664
}
1665
}
1666
1667
/* Find network hooks and run them */
1668
{
1669
struct dirent **direntries;
1670
struct dirent *direntry;
1671
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1672
alphasort);
1673
if(numhooks == -1){
1674
perror_plus("scandir");
2068
1675
} else {
2069
struct stat st;
2070
2071
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2072
int seckey_fd = open(seckey, O_RDONLY);
2073
if(seckey_fd == -1){
2074
perror_plus("open");
2075
} else {
2076
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2077
if(ret == -1){
2078
perror_plus("fstat");
2079
} else {
2080
if(S_ISREG(st.st_mode)
2081
and st.st_uid == 0 and st.st_gid == 0){
2082
ret = fchown(seckey_fd, uid, gid);
2083
if(ret == -1){
2084
perror_plus("fchown");
2085
}
2086
}
2087
}
2088
TEMP_FAILURE_RETRY(close(seckey_fd));
2089
}
2090
}
2091
2092
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2093
int pubkey_fd = open(pubkey, O_RDONLY);
2094
if(pubkey_fd == -1){
2095
perror_plus("open");
2096
} else {
2097
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2098
if(ret == -1){
2099
perror_plus("fstat");
2100
} else {
2101
if(S_ISREG(st.st_mode)
2102
and st.st_uid == 0 and st.st_gid == 0){
2103
ret = fchown(pubkey_fd, uid, gid);
2104
if(ret == -1){
2105
perror_plus("fchown");
2106
}
2107
}
2108
}
2109
TEMP_FAILURE_RETRY(close(pubkey_fd));
2110
}
2111
}
2112
2113
/* Lower privileges */
2114
ret_errno = lower_privileges();
2115
if(ret_errno != 0){
2116
errno = ret_errno;
2117
perror_plus("Failed to lower privileges");
2118
}
2119
}
2120
}
2121
2122
/* Remove invalid interface names (except "none") */
2123
{
2124
char *interface = NULL;
2125
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2126
interface))){
2127
if(strcmp(interface, "none") != 0
2128
and if_nametoindex(interface) == 0){
2129
if(interface[0] != '\0'){
2130
fprintf_plus(stderr, "Not using nonexisting interface"
2131
" \"%s\"\n", interface);
2132
}
2133
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2134
interface = NULL;
2135
}
2136
}
2137
}
2138
2139
/* Run network hooks */
2140
{
2141
if(mc.interfaces != NULL){
2142
interfaces_hooks = malloc(mc.interfaces_size);
2143
if(interfaces_hooks == NULL){
2144
perror_plus("malloc");
2145
goto end;
2146
}
2147
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2148
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2149
}
2150
run_network_hooks("start", interfaces_hooks != NULL ?
2151
interfaces_hooks : "", delay);
1676
int devnull = open("/dev/null", O_RDONLY);
1677
for(int i = 0; i < numhooks; i++){
1678
direntry = direntries[0];
1679
char *fullname = NULL;
1680
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1681
if(ret < 0){
1682
perror_plus("asprintf");
1683
continue;
1684
}
1685
pid_t hook_pid = fork();
1686
if(hook_pid == 0){
1687
/* Child */
1688
dup2(devnull, STDIN_FILENO);
1689
close(devnull);
1690
dup2(STDERR_FILENO, STDOUT_FILENO);
1691
ret = setenv("DEVICE", interface, 1);
1692
if(ret == -1){
1693
perror_plus("setenv");
1694
exit(1);
1695
}
1696
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1697
if(ret == -1){
1698
perror_plus("setenv");
1699
exit(1);
1700
}
1701
ret = setenv("MODE", "start", 1);
1702
if(ret == -1){
1703
perror_plus("setenv");
1704
exit(1);
1705
}
1706
char *delaystring;
1707
ret = asprintf(&delaystring, "%f", delay);
1708
if(ret == -1){
1709
perror_plus("asprintf");
1710
exit(1);
1711
}
1712
ret = setenv("DELAY", delaystring, 1);
1713
if(ret == -1){
1714
free(delaystring);
1715
perror_plus("setenv");
1716
exit(1);
1717
}
1718
free(delaystring);
1719
ret = execl(fullname, direntry->d_name, "start", NULL);
1720
perror_plus("execl");
1721
} else {
1722
int status;
1723
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1724
perror_plus("waitpid");
1725
free(fullname);
1726
continue;
1727
}
1728
if(WIFEXITED(status)){
1729
if(WEXITSTATUS(status) != 0){
1730
fprintf(stderr, "Mandos plugin mandos-client: "
1731
"Warning: network hook \"%s\" exited"
1732
" with status %d\n", direntry->d_name,
1733
WEXITSTATUS(status));
1734
free(fullname);
1735
continue;
1736
}
1737
} else if(WIFSIGNALED(status)){
1738
fprintf(stderr, "Mandos plugin mandos-client: "
1739
"Warning: network hook \"%s\" died by"
1740
" signal %d\n", direntry->d_name,
1741
WTERMSIG(status));
1742
free(fullname);
1743
continue;
1744
} else {
1745
fprintf(stderr, "Mandos plugin mandos-client: "
1746
"Warning: network hook \"%s\" crashed\n",
1747
direntry->d_name);
1748
free(fullname);
1749
continue;
1750
}
1751
}
1752
free(fullname);
1753
if(quit_now){
1754
goto end;
1755
}
1756
}
1757
close(devnull);
1758
}
2152
1759
}
2153
1760
2154
1761
if(not debug){
2155
1762
avahi_set_log_function(empty_log);
2156
1763
}
2157
1764
1765
if(interface[0] == '\0'){
1766
struct dirent **direntries;
1767
/* First look for interfaces that are up */
1768
ret = scandir(sys_class_net, &direntries, up_interface,
1769
alphasort);
1770
if(ret == 0){
1771
/* No up interfaces, look for any good interfaces */
1772
free(direntries);
1773
ret = scandir(sys_class_net, &direntries, good_interface,
1774
alphasort);
1775
}
1776
if(ret >= 1){
1777
/* Pick the first interface returned */
1778
interface = strdup(direntries[0]->d_name);
1779
if(debug){
1780
fprintf(stderr, "Mandos plugin mandos-client: "
1781
"Using interface \"%s\"\n", interface);
1782
}
1783
if(interface == NULL){
1784
perror_plus("malloc");
1785
free(direntries);
1786
exitcode = EXIT_FAILURE;
1787
goto end;
1788
}
1789
free(direntries);
1790
} else {
1791
free(direntries);
1792
fprintf(stderr, "Mandos plugin mandos-client: "
1793
"Could not find a network interface\n");
1794
exitcode = EXIT_FAILURE;
1795
goto end;
1796
}
1797
}
1798
2158
1799
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2159
1800
from the signal handler */
2160
1801
/* Initialize the pseudo-RNG for Avahi */
2161
1802
srand((unsigned int) time(NULL));
2162
simple_poll = avahi_simple_poll_new();
2163
if(simple_poll == NULL){
2164
fprintf_plus(stderr,
2165
"Avahi: Failed to create simple poll object.\n");
1803
mc.simple_poll = avahi_simple_poll_new();
1804
if(mc.simple_poll == NULL){
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Avahi: Failed to create simple poll object.\n");
2166
1807
exitcode = EX_UNAVAILABLE;
2167
1808
goto end;
2168
1809
}
2230
1871
}
2231
1872
}
2232
1873
2233
/* If no interfaces were specified, make a list */
2234
if(mc.interfaces == NULL){
2235
struct dirent **direntries;
2236
/* Look for any good interfaces */
2237
ret = scandir(sys_class_net, &direntries, good_interface,
2238
alphasort);
2239
if(ret >= 1){
2240
/* Add all found interfaces to interfaces list */
2241
for(int i = 0; i < ret; ++i){
2242
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2243
direntries[i]->d_name);
2244
if(ret_errno != 0){
2245
errno = ret_errno;
2246
perror_plus("argz_add");
2247
continue;
2248
}
2249
if(debug){
2250
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2251
direntries[i]->d_name);
2252
}
2253
}
2254
free(direntries);
1874
/* If the interface is down, bring it up */
1875
if(strcmp(interface, "none") != 0){
1876
if_index = (AvahiIfIndex) if_nametoindex(interface);
1877
if(if_index == 0){
1878
fprintf(stderr, "Mandos plugin mandos-client: "
1879
"No such interface: \"%s\"\n", interface);
1880
exitcode = EX_UNAVAILABLE;
1881
goto end;
1882
}
1883
1884
if(quit_now){
1885
goto end;
1886
}
1887
1888
/* Re-raise priviliges */
1889
errno = 0;
1890
ret = seteuid(0);
1891
if(ret == -1){
1892
perror_plus("seteuid");
1893
}
1894
1895
#ifdef __linux__
1896
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1897
messages about the network interface to mess up the prompt */
1898
ret = klogctl(8, NULL, 5);
1899
bool restore_loglevel = true;
1900
if(ret == -1){
1901
restore_loglevel = false;
1902
perror_plus("klogctl");
1903
}
1904
#endif /* __linux__ */
1905
1906
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1907
if(sd < 0){
1908
perror_plus("socket");
1909
exitcode = EX_OSERR;
1910
#ifdef __linux__
1911
if(restore_loglevel){
1912
ret = klogctl(7, NULL, 0);
1913
if(ret == -1){
1914
perror_plus("klogctl");
1915
}
1916
}
1917
#endif /* __linux__ */
1918
/* Lower privileges */
1919
errno = 0;
1920
ret = seteuid(uid);
1921
if(ret == -1){
1922
perror_plus("seteuid");
1923
}
1924
goto end;
1925
}
1926
strcpy(network.ifr_name, interface);
1927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1928
if(ret == -1){
1929
perror_plus("ioctl SIOCGIFFLAGS");
1930
#ifdef __linux__
1931
if(restore_loglevel){
1932
ret = klogctl(7, NULL, 0);
1933
if(ret == -1){
1934
perror_plus("klogctl");
1935
}
1936
}
1937
#endif /* __linux__ */
1938
exitcode = EX_OSERR;
1939
/* Lower privileges */
1940
errno = 0;
1941
ret = seteuid(uid);
1942
if(ret == -1){
1943
perror_plus("seteuid");
1944
}
1945
goto end;
1946
}
1947
if((network.ifr_flags & IFF_UP) == 0){
1948
network.ifr_flags |= IFF_UP;
1949
take_down_interface = true;
1950
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1951
if(ret == -1){
1952
take_down_interface = false;
1953
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1954
exitcode = EX_OSERR;
1955
#ifdef __linux__
1956
if(restore_loglevel){
1957
ret = klogctl(7, NULL, 0);
1958
if(ret == -1){
1959
perror_plus("klogctl");
1960
}
1961
}
1962
#endif /* __linux__ */
1963
/* Lower privileges */
1964
errno = 0;
1965
ret = seteuid(uid);
1966
if(ret == -1){
1967
perror_plus("seteuid");
1968
}
1969
goto end;
1970
}
1971
}
1972
/* Sleep checking until interface is running.
1973
Check every 0.25s, up to total time of delay */
1974
for(int i=0; i < delay * 4; i++){
1975
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1976
if(ret == -1){
1977
perror_plus("ioctl SIOCGIFFLAGS");
1978
} else if(network.ifr_flags & IFF_RUNNING){
1979
break;
1980
}
1981
struct timespec sleeptime = { .tv_nsec = 250000000 };
1982
ret = nanosleep(&sleeptime, NULL);
1983
if(ret == -1 and errno != EINTR){
1984
perror_plus("nanosleep");
1985
}
1986
}
1987
if(not take_down_interface){
1988
/* We won't need the socket anymore */
1989
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1990
if(ret == -1){
1991
perror_plus("close");
1992
}
1993
}
1994
#ifdef __linux__
1995
if(restore_loglevel){
1996
/* Restores kernel loglevel to default */
1997
ret = klogctl(7, NULL, 0);
1998
if(ret == -1){
1999
perror_plus("klogctl");
2000
}
2001
}
2002
#endif /* __linux__ */
2003
/* Lower privileges */
2004
errno = 0;
2005
if(take_down_interface){
2006
/* Lower privileges */
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2010
}
2255
2011
} else {
2256
free(direntries);
2257
fprintf_plus(stderr, "Could not find a network interface\n");
2258
exitcode = EXIT_FAILURE;
2259
goto end;
2260
}
2261
}
2262
2263
/* Bring up interfaces which are down, and remove any "none"s */
2264
{
2265
char *interface = NULL;
2266
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2267
interface))){
2268
/* If interface name is "none", stop bringing up interfaces.
2269
Also remove all instances of "none" from the list */
2270
if(strcmp(interface, "none") == 0){
2271
argz_delete(&mc.interfaces, &mc.interfaces_size,
2272
interface);
2273
interface = NULL;
2274
while((interface = argz_next(mc.interfaces,
2275
mc.interfaces_size, interface))){
2276
if(strcmp(interface, "none") == 0){
2277
argz_delete(&mc.interfaces, &mc.interfaces_size,
2278
interface);
2279
interface = NULL;
2280
}
2281
}
2282
break;
2283
}
2284
bool interface_was_up = interface_is_up(interface);
2285
errno = bring_up_interface(interface, delay);
2286
if(not interface_was_up){
2287
if(errno != 0){
2288
perror_plus("Failed to bring up interface");
2289
} else {
2290
errno = argz_add(&interfaces_to_take_down,
2291
&interfaces_to_take_down_size,
2292
interface);
2293
if(errno != 0){
2294
perror_plus("argz_add");
2295
}
2296
}
2297
}
2298
}
2299
if(debug and (interfaces_to_take_down == NULL)){
2300
fprintf_plus(stderr, "No interfaces were brought up\n");
2301
}
2302
}
2303
2304
/* If we only got one interface, explicitly use only that one */
2305
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2306
if(debug){
2307
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2308
mc.interfaces);
2309
}
2310
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2012
/* Lower privileges permanently */
2013
ret = setuid(uid);
2014
if(ret == -1){
2015
perror_plus("setuid");
2016
}
2017
}
2311
2018
}
2312
2019
2313
2020
if(quit_now){
2314
2021
goto end;
2315
2022
}
2316
2023
2317
ret = init_gnutls_global(pubkey, seckey, &mc);
2024
ret = init_gnutls_global(pubkey, seckey);
2318
2025
if(ret == -1){
2319
fprintf_plus(stderr, "init_gnutls_global failed\n");
2026
fprintf(stderr, "Mandos plugin mandos-client: "
2027
"init_gnutls_global failed\n");
2320
2028
exitcode = EX_UNAVAILABLE;
2321
2029
goto end;
2322
2030
} else {
2337
2045
goto end;
2338
2046
}
2339
2047
2340
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2341
fprintf_plus(stderr, "init_gpgme failed\n");
2048
if(not init_gpgme(pubkey, seckey, tempdir)){
2049
fprintf(stderr, "Mandos plugin mandos-client: "
2050
"init_gpgme failed\n");
2342
2051
exitcode = EX_UNAVAILABLE;
2343
2052
goto end;
2344
2053
} else {
2353
2062
/* Connect directly, do not use Zeroconf */
2354
2063
/* (Mainly meant for debugging) */
2355
2064
char *address = strrchr(connect_to, ':');
2356
2357
2065
if(address == NULL){
2358
fprintf_plus(stderr, "No colon in address\n");
2066
fprintf(stderr, "Mandos plugin mandos-client: "
2067
"No colon in address\n");
2359
2068
exitcode = EX_USAGE;
2360
2069
goto end;
2361
2070
}
2364
2073
goto end;
2365
2074
}
2366
2075
2367
in_port_t port;
2076
uint16_t port;
2368
2077
errno = 0;
2369
2078
tmpmax = strtoimax(address+1, &tmp, 10);
2370
2079
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2371
or tmpmax != (in_port_t)tmpmax){
2372
fprintf_plus(stderr, "Bad port number\n");
2080
or tmpmax != (uint16_t)tmpmax){
2081
fprintf(stderr, "Mandos plugin mandos-client: "
2082
"Bad port number\n");
2373
2083
exitcode = EX_USAGE;
2374
2084
goto end;
2375
2085
}
2376
2086
2377
2087
if(quit_now){
2378
2088
goto end;
2379
2089
}
2380
2090
2381
port = (in_port_t)tmpmax;
2091
port = (uint16_t)tmpmax;
2382
2092
*address = '\0';
2383
2093
/* Colon in address indicates IPv6 */
2384
2094
int af;
2400
2110
}
2401
2111
2402
2112
while(not quit_now){
2403
ret = start_mandos_communication(address, port, if_index, af,
2404
&mc);
2113
ret = start_mandos_communication(address, port, if_index, af);
2405
2114
if(quit_now or ret == 0){
2406
2115
break;
2407
2116
}
2408
2117
if(debug){
2409
fprintf_plus(stderr, "Retrying in %d seconds\n",
2410
(int)retry_interval);
2118
fprintf(stderr, "Mandos plugin mandos-client: "
2119
"Retrying in %d seconds\n", (int)retry_interval);
2411
2120
}
2412
sleep((unsigned int)retry_interval);
2121
sleep((int)retry_interval);
2413
2122
}
2414
2123
2415
if(not quit_now){
2124
if (not quit_now){
2416
2125
exitcode = EXIT_SUCCESS;
2417
2126
}
2418
2127
2433
2142
config.publish_domain = 0;
2434
2143
2435
2144
/* Allocate a new server */
2436
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2437
&config, NULL, NULL, &ret_errno);
2145
mc.server = avahi_server_new(avahi_simple_poll_get
2146
(mc.simple_poll), &config, NULL,
2147
NULL, &error);
2438
2148
2439
2149
/* Free the Avahi configuration data */
2440
2150
avahi_server_config_free(&config);
2442
2152
2443
2153
/* Check if creating the Avahi server object succeeded */
2444
2154
if(mc.server == NULL){
2445
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2446
avahi_strerror(ret_errno));
2155
fprintf(stderr, "Mandos plugin mandos-client: "
2156
"Failed to create Avahi server: %s\n",
2157
avahi_strerror(error));
2447
2158
exitcode = EX_UNAVAILABLE;
2448
2159
goto end;
2449
2160
}
2455
2166
/* Create the Avahi service browser */
2456
2167
sb = avahi_s_service_browser_new(mc.server, if_index,
2457
2168
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2458
NULL, 0, browse_callback,
2459
(void *)&mc);
2169
NULL, 0, browse_callback, NULL);
2460
2170
if(sb == NULL){
2461
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2462
avahi_strerror(avahi_server_errno(mc.server)));
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2463
2174
exitcode = EX_UNAVAILABLE;
2464
2175
goto end;
2465
2176
}
2471
2182
/* Run the main loop */
2472
2183
2473
2184
if(debug){
2474
fprintf_plus(stderr, "Starting Avahi loop search\n");
2185
fprintf(stderr, "Mandos plugin mandos-client: "
2186
"Starting Avahi loop search\n");
2475
2187
}
2476
2188
2477
ret = avahi_loop_with_timeout(simple_poll,
2478
(int)(retry_interval * 1000), &mc);
2189
ret = avahi_loop_with_timeout(mc.simple_poll,
2190
(int)(retry_interval * 1000));
2479
2191
if(debug){
2480
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2481
(ret == 0) ? "successfully" : "with error");
2192
fprintf(stderr, "Mandos plugin mandos-client: "
2193
"avahi_loop_with_timeout exited %s\n",
2194
(ret == 0) ? "successfully" : "with error");
2482
2195
}
2483
2196
2484
2197
end:
2485
2198
2486
2199
if(debug){
2487
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2200
fprintf(stderr, "Mandos plugin mandos-client: "
2201
"%s exiting\n", argv[0]);
2488
2202
}
2489
2203
2490
2204
/* Cleanup things */
2491
free(mc.interfaces);
2492
2493
2205
if(sb != NULL)
2494
2206
avahi_s_service_browser_free(sb);
2495
2207
2496
2208
if(mc.server != NULL)
2497
2209
avahi_server_free(mc.server);
2498
2210
2499
if(simple_poll != NULL)
2500
avahi_simple_poll_free(simple_poll);
2211
if(mc.simple_poll != NULL)
2212
avahi_simple_poll_free(mc.simple_poll);
2501
2213
2502
2214
if(gnutls_initialized){
2503
2215
gnutls_certificate_free_credentials(mc.cred);
2508
2220
if(gpgme_initialized){
2509
2221
gpgme_release(mc.ctx);
2510
2222
}
2511
2223
2512
2224
/* Cleans up the circular linked list of Mandos servers the client
2513
2225
has seen */
2514
2226
if(mc.current_server != NULL){
2520
2232
}
2521
2233
}
2522
2234
2523
/* Re-raise privileges */
2524
{
2525
ret_errno = raise_privileges();
2526
if(ret_errno != 0){
2527
perror_plus("Failed to raise privileges");
2528
} else {
2529
2530
/* Run network hooks */
2531
run_network_hooks("stop", interfaces_hooks != NULL ?
2532
interfaces_hooks : "", delay);
2533
2534
/* Take down the network interfaces which were brought up */
2535
{
2536
char *interface = NULL;
2537
while((interface=argz_next(interfaces_to_take_down,
2538
interfaces_to_take_down_size,
2539
interface))){
2540
ret_errno = take_down_interface(interface);
2541
if(ret_errno != 0){
2542
errno = ret_errno;
2543
perror_plus("Failed to take down interface");
2544
}
2545
}
2546
if(debug and (interfaces_to_take_down == NULL)){
2547
fprintf_plus(stderr, "No interfaces needed to be taken"
2548
" down\n");
2549
}
2550
}
2235
/* XXX run network hooks "stop" here */
2236
2237
/* Take down the network interface */
2238
if(take_down_interface){
2239
/* Re-raise priviliges */
2240
errno = 0;
2241
ret = seteuid(0);
2242
if(ret == -1){
2243
perror_plus("seteuid");
2551
2244
}
2552
ret_errno = lower_privileges_permanently();
2553
if(ret_errno != 0){
2554
perror_plus("Failed to lower privileges permanently");
2245
if(geteuid() == 0){
2246
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2247
if(ret == -1){
2248
perror_plus("ioctl SIOCGIFFLAGS");
2249
} else if(network.ifr_flags & IFF_UP){
2250
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2251
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2252
if(ret == -1){
2253
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2254
}
2255
}
2256
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2257
if(ret == -1){
2258
perror_plus("close");
2259
}
2260
/* Lower privileges permanently */
2261
errno = 0;
2262
ret = setuid(uid);
2263
if(ret == -1){
2264
perror_plus("setuid");
2265
}
2555
2266
}
2556
2267
}
2557
2268
2558
free(interfaces_to_take_down);
2559
free(interfaces_hooks);
2560
2561
2269
/* Removes the GPGME temp directory and all files inside */
2562
2270
if(tempdir_created){
2563
2271
struct dirent **direntries = NULL;
2564
2272
struct dirent *direntry = NULL;
2565
2273
int numentries = scandir(tempdir, &direntries, notdotentries,
2566
2274
alphasort);
2567
if(numentries > 0){
2275
if (numentries > 0){
2568
2276
for(int i = 0; i < numentries; i++){
2569
2277
direntry = direntries[i];
2570
2278
char *fullname = NULL;
2576
2284
}
2577
2285
ret = remove(fullname);
2578
2286
if(ret == -1){
2579
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2580
strerror(errno));
2287
fprintf(stderr, "Mandos plugin mandos-client: "
2288
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2581
2289
}
2582
2290
free(fullname);
2583
2291
}
2585
2293
2586
2294
/* need to clean even if 0 because man page doesn't specify */
2587
2295
free(direntries);
2588
if(numentries == -1){
2296
if (numentries == -1){
2589
2297
perror_plus("scandir");
2590
2298
}
2591
2299
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0