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- Committer: Teddy Hogeborn
- Date: 2012-06-17 02:30:59 UTC
- Revision ID: teddy@recompile.se-20120617023059-em4nfnxg1tsn64xj
* plugins.d/mandos-client (start_mandos_communication): Bug fix; skip
non-specified
interfaces.
(main): Use lower_privileges() consistently. Bug fix: Don't remove
"none" from list of interfaces. Make --interface=none work
again by not bringing up interfaces specified after "none".
* plugins.d/mandos-client.xml (OPTIONS): Document new meaning of
specifying --interface=none
together with other
interface names,
non-specified
interfaces.
(main): Use lower_privileges() consistently. Bug fix: Don't remove
"none" from list of interfaces. Make --interface=none work
again by not bringing up interfaces specified after "none".
* plugins.d/mandos-client.xml (OPTIONS): Document new meaning of
specifying --interface=none
together with other
interface names,
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
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() */
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
66
#include <time.h> /* nanosleep(), time(), sleep() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
79
79
argp_state, struct argp,
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
84
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
86
94
87
95
#ifdef __linux__
88
96
#include <sys/klog.h> /* klogctl() */
106
114
init_gnutls_session(),
107
115
GNUTLS_* */
108
116
#include <gnutls/openpgp.h>
109
/* gnutls_certificate_set_openpgp_key_file(),
110
GNUTLS_OPENPGP_FMT_BASE64 */
117
/* gnutls_certificate_set_openpgp_key_file(),
118
GNUTLS_OPENPGP_FMT_BASE64 */
111
119
112
120
/* GPGME */
113
121
#include <gpgme.h> /* All GPGME types, constants and
121
129
#define PATHDIR "/conf/conf.d/mandos"
122
130
#define SECKEY "seckey.txt"
123
131
#define PUBKEY "pubkey.txt"
132
#define HOOKDIR "/lib/mandos/network-hooks.d"
124
133
125
134
bool debug = false;
126
135
static const char mandos_protocol_version[] = "1";
127
136
const char *argp_program_version = "mandos-client " VERSION;
128
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
137
const char *argp_program_bug_address = "<mandos@recompile.se>";
138
static const char sys_class_net[] = "/sys/class/net";
139
char *connect_to = NULL;
140
const char *hookdir = HOOKDIR;
141
uid_t uid = 65534;
142
gid_t gid = 65534;
143
144
/* Doubly linked list that need to be circularly linked when used */
145
typedef struct server{
146
const char *ip;
147
in_port_t port;
148
AvahiIfIndex if_index;
149
int af;
150
struct timespec last_seen;
151
struct server *next;
152
struct server *prev;
153
} server;
129
154
130
155
/* Used for passing in values through the Avahi callback functions */
131
156
typedef struct {
132
AvahiSimplePoll *simple_poll;
133
157
AvahiServer *server;
134
158
gnutls_certificate_credentials_t cred;
135
159
unsigned int dh_bits;
136
160
gnutls_dh_params_t dh_params;
137
161
const char *priority;
138
162
gpgme_ctx_t ctx;
163
server *current_server;
164
char *interfaces;
165
size_t interfaces_size;
139
166
} mandos_context;
140
167
141
/* global context so signal handler can reach it*/
142
mandos_context mc = { .simple_poll = NULL, .server = NULL,
143
.dh_bits = 1024, .priority = "SECURE256"
144
":!CTYPE-X.509:+CTYPE-OPENPGP" };
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
145
170
146
171
sig_atomic_t quit_now = 0;
147
172
int signal_received = 0;
148
173
174
/* Function to use when printing errors */
175
void perror_plus(const char *print_text){
176
int e = errno;
177
fprintf(stderr, "Mandos plugin %s: ",
178
program_invocation_short_name);
179
errno = e;
180
perror(print_text);
181
}
182
183
__attribute__((format (gnu_printf, 2, 3)))
184
int fprintf_plus(FILE *stream, const char *format, ...){
185
va_list ap;
186
va_start (ap, format);
187
188
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
}
192
149
193
/*
150
194
* Make additional room in "buffer" for at least BUFFER_SIZE more
151
195
* bytes. "buffer_capacity" is how much is currently allocated,
152
196
* "buffer_length" is how much is already used.
153
197
*/
154
198
size_t incbuffer(char **buffer, size_t buffer_length,
155
size_t buffer_capacity){
199
size_t buffer_capacity){
156
200
if(buffer_length + BUFFER_SIZE > buffer_capacity){
157
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
158
202
if(buffer == NULL){
163
207
return buffer_capacity;
164
208
}
165
209
210
/* Add server to set of servers to retry periodically */
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
int af, server **current_server){
213
int ret;
214
server *new_server = malloc(sizeof(server));
215
if(new_server == NULL){
216
perror_plus("malloc");
217
return false;
218
}
219
*new_server = (server){ .ip = strdup(ip),
220
.port = port,
221
.if_index = if_index,
222
.af = af };
223
if(new_server->ip == NULL){
224
perror_plus("strdup");
225
return false;
226
}
227
/* Special case of first server */
228
if(*current_server == NULL){
229
new_server->next = new_server;
230
new_server->prev = new_server;
231
*current_server = new_server;
232
/* Place the new server last in the list */
233
} else {
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
236
new_server->prev->next = new_server;
237
(*current_server)->prev = new_server;
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
return true;
245
}
246
166
247
/*
167
248
* Initialize GPGME.
168
249
*/
169
static bool init_gpgme(const char *seckey,
170
const char *pubkey, const char *tempdir){
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
171
252
gpgme_error_t rc;
172
253
gpgme_engine_info_t engine_info;
173
254
174
175
255
/*
176
256
* Helper function to insert pub and seckey to the engine keyring.
177
257
*/
182
262
183
263
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
184
264
if(fd == -1){
185
perror("open");
265
perror_plus("open");
186
266
return false;
187
267
}
188
268
189
269
rc = gpgme_data_new_from_fd(&pgp_data, fd);
190
270
if(rc != GPG_ERR_NO_ERROR){
191
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
192
gpgme_strsource(rc), gpgme_strerror(rc));
271
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
272
gpgme_strsource(rc), gpgme_strerror(rc));
193
273
return false;
194
274
}
195
275
196
rc = gpgme_op_import(mc.ctx, pgp_data);
276
rc = gpgme_op_import(mc->ctx, pgp_data);
197
277
if(rc != GPG_ERR_NO_ERROR){
198
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
199
gpgme_strsource(rc), gpgme_strerror(rc));
278
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
gpgme_strsource(rc), gpgme_strerror(rc));
200
280
return false;
201
281
}
202
282
203
283
ret = (int)TEMP_FAILURE_RETRY(close(fd));
204
284
if(ret == -1){
205
perror("close");
285
perror_plus("close");
206
286
}
207
287
gpgme_data_release(pgp_data);
208
288
return true;
209
289
}
210
290
211
291
if(debug){
212
fprintf(stderr, "Initializing GPGME\n");
292
fprintf_plus(stderr, "Initializing GPGME\n");
213
293
}
214
294
215
295
/* Init GPGME */
216
296
gpgme_check_version(NULL);
217
297
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
218
298
if(rc != GPG_ERR_NO_ERROR){
219
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
220
gpgme_strsource(rc), gpgme_strerror(rc));
299
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
221
301
return false;
222
302
}
223
303
224
/* Set GPGME home directory for the OpenPGP engine only */
304
/* Set GPGME home directory for the OpenPGP engine only */
225
305
rc = gpgme_get_engine_info(&engine_info);
226
306
if(rc != GPG_ERR_NO_ERROR){
227
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
228
gpgme_strsource(rc), gpgme_strerror(rc));
307
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
308
gpgme_strsource(rc), gpgme_strerror(rc));
229
309
return false;
230
310
}
231
311
while(engine_info != NULL){
237
317
engine_info = engine_info->next;
238
318
}
239
319
if(engine_info == NULL){
240
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
320
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
321
tempdir);
241
322
return false;
242
323
}
243
324
244
325
/* Create new GPGME "context" */
245
rc = gpgme_new(&(mc.ctx));
326
rc = gpgme_new(&(mc->ctx));
246
327
if(rc != GPG_ERR_NO_ERROR){
247
fprintf(stderr, "bad gpgme_new: %s: %s\n",
248
gpgme_strsource(rc), gpgme_strerror(rc));
328
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
330
gpgme_strerror(rc));
249
331
return false;
250
332
}
251
333
262
344
*/
263
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
264
346
size_t crypto_size,
265
char **plaintext){
347
char **plaintext,
348
mandos_context *mc){
266
349
gpgme_data_t dh_crypto, dh_plain;
267
350
gpgme_error_t rc;
268
351
ssize_t ret;
270
353
ssize_t plaintext_length = 0;
271
354
272
355
if(debug){
273
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
356
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
274
357
}
275
358
276
359
/* Create new GPGME data buffer from memory cryptotext */
277
360
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
278
361
0);
279
362
if(rc != GPG_ERR_NO_ERROR){
280
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
281
gpgme_strsource(rc), gpgme_strerror(rc));
363
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
282
365
return -1;
283
366
}
284
367
285
368
/* Create new empty GPGME data buffer for the plaintext */
286
369
rc = gpgme_data_new(&dh_plain);
287
370
if(rc != GPG_ERR_NO_ERROR){
288
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
371
fprintf_plus(stderr, "Mandos plugin mandos-client: "
372
"bad gpgme_data_new: %s: %s\n",
373
gpgme_strsource(rc), gpgme_strerror(rc));
290
374
gpgme_data_release(dh_crypto);
291
375
return -1;
292
376
}
293
377
294
378
/* Decrypt data from the cryptotext data buffer to the plaintext
295
379
data buffer */
296
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
297
381
if(rc != GPG_ERR_NO_ERROR){
298
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
382
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
gpgme_strsource(rc), gpgme_strerror(rc));
300
384
plaintext_length = -1;
301
385
if(debug){
302
386
gpgme_decrypt_result_t result;
303
result = gpgme_op_decrypt_result(mc.ctx);
387
result = gpgme_op_decrypt_result(mc->ctx);
304
388
if(result == NULL){
305
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
389
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
306
390
} else {
307
fprintf(stderr, "Unsupported algorithm: %s\n",
308
result->unsupported_algorithm);
309
fprintf(stderr, "Wrong key usage: %u\n",
310
result->wrong_key_usage);
391
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
392
result->unsupported_algorithm);
393
fprintf_plus(stderr, "Wrong key usage: %u\n",
394
result->wrong_key_usage);
311
395
if(result->file_name != NULL){
312
fprintf(stderr, "File name: %s\n", result->file_name);
396
fprintf_plus(stderr, "File name: %s\n", result->file_name);
313
397
}
314
398
gpgme_recipient_t recipient;
315
399
recipient = result->recipients;
316
400
while(recipient != NULL){
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");
401
fprintf_plus(stderr, "Public key algorithm: %s\n",
402
gpgme_pubkey_algo_name
403
(recipient->pubkey_algo));
404
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
405
fprintf_plus(stderr, "Secret key available: %s\n",
406
recipient->status == GPG_ERR_NO_SECKEY
407
? "No" : "Yes");
323
408
recipient = recipient->next;
324
409
}
325
410
}
328
413
}
329
414
330
415
if(debug){
331
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
416
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
332
417
}
333
418
334
419
/* Seek back to the beginning of the GPGME plaintext data buffer */
335
420
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
336
perror("gpgme_data_seek");
421
perror_plus("gpgme_data_seek");
337
422
plaintext_length = -1;
338
423
goto decrypt_end;
339
424
}
341
426
*plaintext = NULL;
342
427
while(true){
343
428
plaintext_capacity = incbuffer(plaintext,
344
(size_t)plaintext_length,
345
plaintext_capacity);
429
(size_t)plaintext_length,
430
plaintext_capacity);
346
431
if(plaintext_capacity == 0){
347
perror("incbuffer");
348
plaintext_length = -1;
349
goto decrypt_end;
432
perror_plus("incbuffer");
433
plaintext_length = -1;
434
goto decrypt_end;
350
435
}
351
436
352
437
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
357
442
break;
358
443
}
359
444
if(ret < 0){
360
perror("gpgme_data_read");
445
perror_plus("gpgme_data_read");
361
446
plaintext_length = -1;
362
447
goto decrypt_end;
363
448
}
365
450
}
366
451
367
452
if(debug){
368
fprintf(stderr, "Decrypted password is: ");
453
fprintf_plus(stderr, "Decrypted password is: ");
369
454
for(ssize_t i = 0; i < plaintext_length; i++){
370
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
371
456
}
383
468
}
384
469
385
470
static const char * safer_gnutls_strerror(int value){
386
const char *ret = gnutls_strerror(value); /* Spurious warning from
387
-Wunreachable-code */
471
const char *ret = gnutls_strerror(value);
388
472
if(ret == NULL)
389
473
ret = "(unknown)";
390
474
return ret;
393
477
/* GnuTLS log function callback */
394
478
static void debuggnutls(__attribute__((unused)) int level,
395
479
const char* string){
396
fprintf(stderr, "GnuTLS: %s", string);
480
fprintf_plus(stderr, "GnuTLS: %s", string);
397
481
}
398
482
399
483
static int init_gnutls_global(const char *pubkeyfilename,
400
const char *seckeyfilename){
484
const char *seckeyfilename,
485
mandos_context *mc){
401
486
int ret;
402
487
403
488
if(debug){
404
fprintf(stderr, "Initializing GnuTLS\n");
489
fprintf_plus(stderr, "Initializing GnuTLS\n");
405
490
}
406
491
407
492
ret = gnutls_global_init();
408
493
if(ret != GNUTLS_E_SUCCESS){
409
fprintf(stderr, "GnuTLS global_init: %s\n",
410
safer_gnutls_strerror(ret));
494
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
495
safer_gnutls_strerror(ret));
411
496
return -1;
412
497
}
413
498
420
505
}
421
506
422
507
/* OpenPGP credentials */
423
gnutls_certificate_allocate_credentials(&mc.cred);
508
ret = gnutls_certificate_allocate_credentials(&mc->cred);
424
509
if(ret != GNUTLS_E_SUCCESS){
425
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
426
from
427
-Wunreachable-code
428
*/
429
safer_gnutls_strerror(ret));
510
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
511
safer_gnutls_strerror(ret));
430
512
gnutls_global_deinit();
431
513
return -1;
432
514
}
433
515
434
516
if(debug){
435
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
436
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
437
seckeyfilename);
517
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
518
" secret key %s as GnuTLS credentials\n",
519
pubkeyfilename,
520
seckeyfilename);
438
521
}
439
522
440
523
ret = gnutls_certificate_set_openpgp_key_file
441
(mc.cred, pubkeyfilename, seckeyfilename,
524
(mc->cred, pubkeyfilename, seckeyfilename,
442
525
GNUTLS_OPENPGP_FMT_BASE64);
443
526
if(ret != GNUTLS_E_SUCCESS){
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
fprintf_plus(stderr,
528
"Error[%d] while reading the OpenPGP key pair ('%s',"
529
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
530
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
531
safer_gnutls_strerror(ret));
449
532
goto globalfail;
450
533
}
451
534
452
535
/* GnuTLS server initialization */
453
ret = gnutls_dh_params_init(&mc.dh_params);
536
ret = gnutls_dh_params_init(&mc->dh_params);
454
537
if(ret != GNUTLS_E_SUCCESS){
455
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
456
" %s\n", safer_gnutls_strerror(ret));
538
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
" initialization: %s\n",
540
safer_gnutls_strerror(ret));
457
541
goto globalfail;
458
542
}
459
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
460
544
if(ret != GNUTLS_E_SUCCESS){
461
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
462
safer_gnutls_strerror(ret));
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
safer_gnutls_strerror(ret));
463
547
goto globalfail;
464
548
}
465
549
466
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
467
551
468
552
return 0;
469
553
470
554
globalfail:
471
555
472
gnutls_certificate_free_credentials(mc.cred);
556
gnutls_certificate_free_credentials(mc->cred);
473
557
gnutls_global_deinit();
474
gnutls_dh_params_deinit(mc.dh_params);
558
gnutls_dh_params_deinit(mc->dh_params);
475
559
return -1;
476
560
}
477
561
478
static int init_gnutls_session(gnutls_session_t *session){
562
static int init_gnutls_session(gnutls_session_t *session,
563
mandos_context *mc){
479
564
int ret;
480
565
/* GnuTLS session creation */
481
566
do {
485
570
}
486
571
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
487
572
if(ret != GNUTLS_E_SUCCESS){
488
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
489
safer_gnutls_strerror(ret));
573
fprintf_plus(stderr,
574
"Error in GnuTLS session initialization: %s\n",
575
safer_gnutls_strerror(ret));
490
576
}
491
577
492
578
{
493
579
const char *err;
494
580
do {
495
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
581
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
496
582
if(quit_now){
497
583
gnutls_deinit(*session);
498
584
return -1;
499
585
}
500
586
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
501
587
if(ret != GNUTLS_E_SUCCESS){
502
fprintf(stderr, "Syntax error at: %s\n", err);
503
fprintf(stderr, "GnuTLS error: %s\n",
504
safer_gnutls_strerror(ret));
588
fprintf_plus(stderr, "Syntax error at: %s\n", err);
589
fprintf_plus(stderr, "GnuTLS error: %s\n",
590
safer_gnutls_strerror(ret));
505
591
gnutls_deinit(*session);
506
592
return -1;
507
593
}
509
595
510
596
do {
511
597
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
512
mc.cred);
598
mc->cred);
513
599
if(quit_now){
514
600
gnutls_deinit(*session);
515
601
return -1;
516
602
}
517
603
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
518
604
if(ret != GNUTLS_E_SUCCESS){
519
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
520
safer_gnutls_strerror(ret));
605
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
606
safer_gnutls_strerror(ret));
521
607
gnutls_deinit(*session);
522
608
return -1;
523
609
}
525
611
/* ignore client certificate if any. */
526
612
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
527
613
528
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
614
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
529
615
530
616
return 0;
531
617
}
535
621
__attribute__((unused)) const char *txt){}
536
622
537
623
/* Called when a Mandos server is found */
538
static int start_mandos_communication(const char *ip, uint16_t port,
624
static int start_mandos_communication(const char *ip, in_port_t port,
539
625
AvahiIfIndex if_index,
540
int af){
626
int af, mandos_context *mc){
541
627
int ret, tcp_sd = -1;
542
628
ssize_t sret;
543
629
union {
553
639
gnutls_session_t session;
554
640
int pf; /* Protocol family */
555
641
642
errno = 0;
643
556
644
if(quit_now){
645
errno = EINTR;
557
646
return -1;
558
647
}
559
648
565
654
pf = PF_INET;
566
655
break;
567
656
default:
568
fprintf(stderr, "Bad address family: %d\n", af);
657
fprintf_plus(stderr, "Bad address family: %d\n", af);
658
errno = EINVAL;
569
659
return -1;
570
660
}
571
661
572
ret = init_gnutls_session(&session);
662
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
663
/* Check if the interface is one of the interfaces we are using */
664
bool match = false;
665
{
666
char *interface = NULL;
667
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
668
interface))){
669
if(if_nametoindex(interface) == (unsigned int)if_index){
670
match = true;
671
break;
672
}
673
}
674
}
675
if(not match){
676
if(debug){
677
char interface[IF_NAMESIZE];
678
if(if_indextoname((unsigned int)if_index, interface) == NULL){
679
perror_plus("if_indextoname");
680
} else {
681
fprintf_plus(stderr, "Skipping server on non-used interface"
682
" \"%s\"\n",
683
if_indextoname((unsigned int)if_index,
684
interface));
685
}
686
}
687
return -1;
688
}
689
}
690
691
ret = init_gnutls_session(&session, mc);
573
692
if(ret != 0){
574
693
return -1;
575
694
}
576
695
577
696
if(debug){
578
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
579
"\n", ip, port);
697
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
698
PRIuMAX "\n", ip, (uintmax_t)port);
580
699
}
581
700
582
701
tcp_sd = socket(pf, SOCK_STREAM, 0);
583
702
if(tcp_sd < 0){
584
perror("socket");
703
int e = errno;
704
perror_plus("socket");
705
errno = e;
585
706
goto mandos_end;
586
707
}
587
708
588
709
if(quit_now){
710
errno = EINTR;
589
711
goto mandos_end;
590
712
}
591
713
598
720
ret = inet_pton(af, ip, &to.in.sin_addr);
599
721
}
600
722
if(ret < 0 ){
601
perror("inet_pton");
723
int e = errno;
724
perror_plus("inet_pton");
725
errno = e;
602
726
goto mandos_end;
603
727
}
604
728
if(ret == 0){
605
fprintf(stderr, "Bad address: %s\n", ip);
729
int e = errno;
730
fprintf_plus(stderr, "Bad address: %s\n", ip);
731
errno = e;
606
732
goto mandos_end;
607
733
}
608
734
if(af == AF_INET6){
609
to.in6.sin6_port = htons(port); /* Spurious warnings from
610
-Wconversion and
611
-Wunreachable-code */
612
735
to.in6.sin6_port = htons(port);
613
736
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
614
737
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
615
-Wunreachable-code*/
738
-Wunreachable-code*/
616
739
if(if_index == AVAHI_IF_UNSPEC){
617
fprintf(stderr, "An IPv6 link-local address is incomplete"
618
" without a network interface\n");
740
fprintf_plus(stderr, "An IPv6 link-local address is"
741
" incomplete without a network interface\n");
742
errno = EINVAL;
619
743
goto mandos_end;
620
744
}
621
745
/* Set the network interface number as scope */
628
752
}
629
753
630
754
if(quit_now){
755
errno = EINTR;
631
756
goto mandos_end;
632
757
}
633
758
635
760
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
636
761
char interface[IF_NAMESIZE];
637
762
if(if_indextoname((unsigned int)if_index, interface) == NULL){
638
perror("if_indextoname");
763
perror_plus("if_indextoname");
639
764
} else {
640
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
641
ip, interface, port);
765
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
766
"\n", ip, interface, (uintmax_t)port);
642
767
}
643
768
} else {
644
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
645
port);
769
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
770
ip, (uintmax_t)port);
646
771
}
647
772
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
648
773
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
655
780
sizeof(addrstr));
656
781
}
657
782
if(pcret == NULL){
658
perror("inet_ntop");
783
perror_plus("inet_ntop");
659
784
} else {
660
785
if(strcmp(addrstr, ip) != 0){
661
fprintf(stderr, "Canonical address form: %s\n", addrstr);
786
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
662
787
}
663
788
}
664
789
}
665
790
666
791
if(quit_now){
792
errno = EINTR;
667
793
goto mandos_end;
668
794
}
669
795
673
799
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
674
800
}
675
801
if(ret < 0){
676
perror("connect");
802
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
803
int e = errno;
804
perror_plus("connect");
805
errno = e;
806
}
677
807
goto mandos_end;
678
808
}
679
809
680
810
if(quit_now){
811
errno = EINTR;
681
812
goto mandos_end;
682
813
}
683
814
686
817
while(true){
687
818
size_t out_size = strlen(out);
688
819
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
689
out_size - written));
820
out_size - written));
690
821
if(ret == -1){
691
perror("write");
822
int e = errno;
823
perror_plus("write");
824
errno = e;
692
825
goto mandos_end;
693
826
}
694
827
written += (size_t)ret;
704
837
}
705
838
706
839
if(quit_now){
840
errno = EINTR;
707
841
goto mandos_end;
708
842
}
709
843
}
710
844
711
845
if(debug){
712
fprintf(stderr, "Establishing TLS session with %s\n", ip);
846
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
713
847
}
714
848
715
849
if(quit_now){
850
errno = EINTR;
716
851
goto mandos_end;
717
852
}
718
853
719
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
854
/* This casting via intptr_t is to eliminate warning about casting
855
an int to a pointer type. This is exactly how the GnuTLS Guile
856
function "set-session-transport-fd!" does it. */
857
gnutls_transport_set_ptr(session,
858
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
720
859
721
860
if(quit_now){
861
errno = EINTR;
722
862
goto mandos_end;
723
863
}
724
864
725
865
do {
726
866
ret = gnutls_handshake(session);
727
867
if(quit_now){
868
errno = EINTR;
728
869
goto mandos_end;
729
870
}
730
871
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
731
872
732
873
if(ret != GNUTLS_E_SUCCESS){
733
874
if(debug){
734
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
875
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
735
876
gnutls_perror(ret);
736
877
}
878
errno = EPROTO;
737
879
goto mandos_end;
738
880
}
739
881
740
882
/* Read OpenPGP packet that contains the wanted password */
741
883
742
884
if(debug){
743
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
744
ip);
885
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
886
" %s\n", ip);
745
887
}
746
888
747
889
while(true){
748
890
749
891
if(quit_now){
892
errno = EINTR;
750
893
goto mandos_end;
751
894
}
752
895
753
896
buffer_capacity = incbuffer(&buffer, buffer_length,
754
buffer_capacity);
897
buffer_capacity);
755
898
if(buffer_capacity == 0){
756
perror("incbuffer");
899
int e = errno;
900
perror_plus("incbuffer");
901
errno = e;
757
902
goto mandos_end;
758
903
}
759
904
760
905
if(quit_now){
906
errno = EINTR;
761
907
goto mandos_end;
762
908
}
763
909
776
922
ret = gnutls_handshake(session);
777
923
778
924
if(quit_now){
925
errno = EINTR;
779
926
goto mandos_end;
780
927
}
781
928
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
782
929
if(ret < 0){
783
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
930
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
931
"***\n");
784
932
gnutls_perror(ret);
933
errno = EPROTO;
785
934
goto mandos_end;
786
935
}
787
936
break;
788
937
default:
789
fprintf(stderr, "Unknown error while reading data from"
790
" encrypted session with Mandos server\n");
938
fprintf_plus(stderr, "Unknown error while reading data from"
939
" encrypted session with Mandos server\n");
791
940
gnutls_bye(session, GNUTLS_SHUT_RDWR);
941
errno = EIO;
792
942
goto mandos_end;
793
943
}
794
944
} else {
797
947
}
798
948
799
949
if(debug){
800
fprintf(stderr, "Closing TLS session\n");
950
fprintf_plus(stderr, "Closing TLS session\n");
801
951
}
802
952
803
953
if(quit_now){
954
errno = EINTR;
804
955
goto mandos_end;
805
956
}
806
957
807
958
do {
808
959
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
809
960
if(quit_now){
961
errno = EINTR;
810
962
goto mandos_end;
811
963
}
812
964
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
813
965
814
966
if(buffer_length > 0){
815
967
ssize_t decrypted_buffer_size;
816
decrypted_buffer_size = pgp_packet_decrypt(buffer,
817
buffer_length,
818
&decrypted_buffer);
968
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
969
&decrypted_buffer, mc);
819
970
if(decrypted_buffer_size >= 0){
820
971
821
972
written = 0;
822
973
while(written < (size_t) decrypted_buffer_size){
823
974
if(quit_now){
975
errno = EINTR;
824
976
goto mandos_end;
825
977
}
826
978
828
980
(size_t)decrypted_buffer_size - written,
829
981
stdout);
830
982
if(ret == 0 and ferror(stdout)){
983
int e = errno;
831
984
if(debug){
832
fprintf(stderr, "Error writing encrypted data: %s\n",
833
strerror(errno));
985
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
986
strerror(errno));
834
987
}
988
errno = e;
835
989
goto mandos_end;
836
990
}
837
991
written += (size_t)ret;
843
997
/* Shutdown procedure */
844
998
845
999
mandos_end:
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;
1000
{
1001
int e = errno;
1002
free(decrypted_buffer);
1003
free(buffer);
1004
if(tcp_sd >= 0){
1005
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1006
}
1007
if(ret == -1){
1008
if(e == 0){
1009
e = errno;
1010
}
1011
perror_plus("close");
1012
}
1013
gnutls_deinit(session);
1014
errno = e;
1015
if(quit_now){
1016
errno = EINTR;
1017
retval = -1;
1018
}
857
1019
}
858
1020
return retval;
859
1021
}
871
1033
AVAHI_GCC_UNUSED AvahiStringList *txt,
872
1034
AVAHI_GCC_UNUSED AvahiLookupResultFlags
873
1035
flags,
874
AVAHI_GCC_UNUSED void* userdata){
875
assert(r);
1036
void* mc){
1037
if(r == NULL){
1038
return;
1039
}
876
1040
877
1041
/* Called whenever a service has been resolved successfully or
878
1042
timed out */
884
1048
switch(event){
885
1049
default:
886
1050
case AVAHI_RESOLVER_FAILURE:
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)));
1051
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1052
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1053
domain,
1054
avahi_strerror(avahi_server_errno
1055
(((mandos_context*)mc)->server)));
890
1056
break;
891
1057
892
1058
case AVAHI_RESOLVER_FOUND:
894
1060
char ip[AVAHI_ADDRESS_STR_MAX];
895
1061
avahi_address_snprint(ip, sizeof(ip), address);
896
1062
if(debug){
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);
1063
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1064
PRIdMAX ") on port %" PRIu16 "\n", name,
1065
host_name, ip, (intmax_t)interface, port);
900
1066
}
901
int ret = start_mandos_communication(ip, port, interface,
902
avahi_proto_to_af(proto));
1067
int ret = start_mandos_communication(ip, (in_port_t)port,
1068
interface,
1069
avahi_proto_to_af(proto),
1070
mc);
903
1071
if(ret == 0){
904
avahi_simple_poll_quit(mc.simple_poll);
1072
avahi_simple_poll_quit(simple_poll);
1073
} else {
1074
if(not add_server(ip, (in_port_t)port, interface,
1075
avahi_proto_to_af(proto),
1076
&((mandos_context*)mc)->current_server)){
1077
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1078
" list\n", name);
1079
}
905
1080
}
906
1081
}
907
1082
}
917
1092
const char *domain,
918
1093
AVAHI_GCC_UNUSED AvahiLookupResultFlags
919
1094
flags,
920
AVAHI_GCC_UNUSED void* userdata){
921
assert(b);
1095
void* mc){
1096
if(b == NULL){
1097
return;
1098
}
922
1099
923
1100
/* Called whenever a new services becomes available on the LAN or
924
1101
is removed from the LAN */
931
1108
default:
932
1109
case AVAHI_BROWSER_FAILURE:
933
1110
934
fprintf(stderr, "(Avahi browser) %s\n",
935
avahi_strerror(avahi_server_errno(mc.server)));
936
avahi_simple_poll_quit(mc.simple_poll);
1111
fprintf_plus(stderr, "(Avahi browser) %s\n",
1112
avahi_strerror(avahi_server_errno
1113
(((mandos_context*)mc)->server)));
1114
avahi_simple_poll_quit(simple_poll);
937
1115
return;
938
1116
939
1117
case AVAHI_BROWSER_NEW:
942
1120
the callback function is called the Avahi server will free the
943
1121
resolver for us. */
944
1122
945
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
946
name, type, domain, protocol, 0,
947
resolve_callback, NULL) == NULL)
948
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
949
name, avahi_strerror(avahi_server_errno(mc.server)));
1123
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1124
interface, protocol, name, type,
1125
domain, protocol, 0,
1126
resolve_callback, mc) == NULL)
1127
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1128
" %s\n", name,
1129
avahi_strerror(avahi_server_errno
1130
(((mandos_context*)mc)->server)));
950
1131
break;
951
1132
952
1133
case AVAHI_BROWSER_REMOVE:
955
1136
case AVAHI_BROWSER_ALL_FOR_NOW:
956
1137
case AVAHI_BROWSER_CACHE_EXHAUSTED:
957
1138
if(debug){
958
fprintf(stderr, "No Mandos server found, still searching...\n");
1139
fprintf_plus(stderr, "No Mandos server found, still"
1140
" searching...\n");
959
1141
}
960
1142
break;
961
1143
}
962
1144
}
963
1145
964
/* stop main loop after sigterm has been called */
1146
/* Signal handler that stops main loop after SIGTERM */
965
1147
static void handle_sigterm(int sig){
966
1148
if(quit_now){
967
1149
return;
969
1151
quit_now = 1;
970
1152
signal_received = sig;
971
1153
int old_errno = errno;
972
if(mc.simple_poll != NULL){
973
avahi_simple_poll_quit(mc.simple_poll);
974
}
975
errno = old_errno;
1154
/* set main loop to exit */
1155
if(simple_poll != NULL){
1156
avahi_simple_poll_quit(simple_poll);
1157
}
1158
errno = old_errno;
1159
}
1160
1161
bool get_flags(const char *ifname, struct ifreq *ifr){
1162
int ret;
1163
error_t ret_errno;
1164
1165
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1166
if(s < 0){
1167
ret_errno = errno;
1168
perror_plus("socket");
1169
errno = ret_errno;
1170
return false;
1171
}
1172
strcpy(ifr->ifr_name, ifname);
1173
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1174
if(ret == -1){
1175
if(debug){
1176
ret_errno = errno;
1177
perror_plus("ioctl SIOCGIFFLAGS");
1178
errno = ret_errno;
1179
}
1180
return false;
1181
}
1182
return true;
1183
}
1184
1185
bool good_flags(const char *ifname, const struct ifreq *ifr){
1186
1187
/* Reject the loopback device */
1188
if(ifr->ifr_flags & IFF_LOOPBACK){
1189
if(debug){
1190
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1191
ifname);
1192
}
1193
return false;
1194
}
1195
/* Accept point-to-point devices only if connect_to is specified */
1196
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1197
if(debug){
1198
fprintf_plus(stderr, "Accepting point-to-point interface"
1199
" \"%s\"\n", ifname);
1200
}
1201
return true;
1202
}
1203
/* Otherwise, reject non-broadcast-capable devices */
1204
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1205
if(debug){
1206
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1207
" \"%s\"\n", ifname);
1208
}
1209
return false;
1210
}
1211
/* Reject non-ARP interfaces (including dummy interfaces) */
1212
if(ifr->ifr_flags & IFF_NOARP){
1213
if(debug){
1214
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1215
ifname);
1216
}
1217
return false;
1218
}
1219
1220
/* Accept this device */
1221
if(debug){
1222
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1223
}
1224
return true;
1225
}
1226
1227
/*
1228
* This function determines if a directory entry in /sys/class/net
1229
* corresponds to an acceptable network device.
1230
* (This function is passed to scandir(3) as a filter function.)
1231
*/
1232
int good_interface(const struct dirent *if_entry){
1233
if(if_entry->d_name[0] == '.'){
1234
return 0;
1235
}
1236
1237
struct ifreq ifr;
1238
if(not get_flags(if_entry->d_name, &ifr)){
1239
if(debug){
1240
fprintf_plus(stderr, "Failed to get flags for interface "
1241
"\"%s\"\n", if_entry->d_name);
1242
}
1243
return 0;
1244
}
1245
1246
if(not good_flags(if_entry->d_name, &ifr)){
1247
return 0;
1248
}
1249
return 1;
1250
}
1251
1252
/*
1253
* This function determines if a network interface is up.
1254
*/
1255
bool interface_is_up(const char *interface){
1256
struct ifreq ifr;
1257
if(not get_flags(interface, &ifr)){
1258
if(debug){
1259
fprintf_plus(stderr, "Failed to get flags for interface "
1260
"\"%s\"\n", interface);
1261
}
1262
return false;
1263
}
1264
1265
return (bool)(ifr.ifr_flags & IFF_UP);
1266
}
1267
1268
/*
1269
* This function determines if a network interface is running
1270
*/
1271
bool interface_is_running(const char *interface){
1272
struct ifreq ifr;
1273
if(not get_flags(interface, &ifr)){
1274
if(debug){
1275
fprintf_plus(stderr, "Failed to get flags for interface "
1276
"\"%s\"\n", interface);
1277
}
1278
return false;
1279
}
1280
1281
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1282
}
1283
1284
int notdotentries(const struct dirent *direntry){
1285
/* Skip "." and ".." */
1286
if(direntry->d_name[0] == '.'
1287
and (direntry->d_name[1] == '\0'
1288
or (direntry->d_name[1] == '.'
1289
and direntry->d_name[2] == '\0'))){
1290
return 0;
1291
}
1292
return 1;
1293
}
1294
1295
/* Is this directory entry a runnable program? */
1296
int runnable_hook(const struct dirent *direntry){
1297
int ret;
1298
size_t sret;
1299
struct stat st;
1300
1301
if((direntry->d_name)[0] == '\0'){
1302
/* Empty name? */
1303
return 0;
1304
}
1305
1306
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1307
"abcdefghijklmnopqrstuvwxyz"
1308
"0123456789"
1309
"_-");
1310
if((direntry->d_name)[sret] != '\0'){
1311
/* Contains non-allowed characters */
1312
if(debug){
1313
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1314
direntry->d_name);
1315
}
1316
return 0;
1317
}
1318
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1321
if(ret < 0){
1322
perror_plus("asprintf");
1323
return 0;
1324
}
1325
1326
ret = stat(fullname, &st);
1327
if(ret == -1){
1328
if(debug){
1329
perror_plus("Could not stat hook");
1330
}
1331
return 0;
1332
}
1333
if(not (S_ISREG(st.st_mode))){
1334
/* Not a regular file */
1335
if(debug){
1336
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1337
direntry->d_name);
1338
}
1339
return 0;
1340
}
1341
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1342
/* Not executable */
1343
if(debug){
1344
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1345
direntry->d_name);
1346
}
1347
return 0;
1348
}
1349
if(debug){
1350
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1351
direntry->d_name);
1352
}
1353
return 1;
1354
}
1355
1356
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1357
mandos_context *mc){
1358
int ret;
1359
struct timespec now;
1360
struct timespec waited_time;
1361
intmax_t block_time;
1362
1363
while(true){
1364
if(mc->current_server == NULL){
1365
if (debug){
1366
fprintf_plus(stderr, "Wait until first server is found."
1367
" No timeout!\n");
1368
}
1369
ret = avahi_simple_poll_iterate(s, -1);
1370
} else {
1371
if (debug){
1372
fprintf_plus(stderr, "Check current_server if we should run"
1373
" it, or wait\n");
1374
}
1375
/* the current time */
1376
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1377
if(ret == -1){
1378
perror_plus("clock_gettime");
1379
return -1;
1380
}
1381
/* Calculating in ms how long time between now and server
1382
who we visted longest time ago. Now - last seen. */
1383
waited_time.tv_sec = (now.tv_sec
1384
- mc->current_server->last_seen.tv_sec);
1385
waited_time.tv_nsec = (now.tv_nsec
1386
- mc->current_server->last_seen.tv_nsec);
1387
/* total time is 10s/10,000ms.
1388
Converting to s from ms by dividing by 1,000,
1389
and ns to ms by dividing by 1,000,000. */
1390
block_time = ((retry_interval
1391
- ((intmax_t)waited_time.tv_sec * 1000))
1392
- ((intmax_t)waited_time.tv_nsec / 1000000));
1393
1394
if (debug){
1395
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1396
block_time);
1397
}
1398
1399
if(block_time <= 0){
1400
ret = start_mandos_communication(mc->current_server->ip,
1401
mc->current_server->port,
1402
mc->current_server->if_index,
1403
mc->current_server->af, mc);
1404
if(ret == 0){
1405
avahi_simple_poll_quit(s);
1406
return 0;
1407
}
1408
ret = clock_gettime(CLOCK_MONOTONIC,
1409
&mc->current_server->last_seen);
1410
if(ret == -1){
1411
perror_plus("clock_gettime");
1412
return -1;
1413
}
1414
mc->current_server = mc->current_server->next;
1415
block_time = 0; /* Call avahi to find new Mandos
1416
servers, but don't block */
1417
}
1418
1419
ret = avahi_simple_poll_iterate(s, (int)block_time);
1420
}
1421
if(ret != 0){
1422
if (ret > 0 or errno != EINTR){
1423
return (ret != 1) ? ret : 0;
1424
}
1425
}
1426
}
1427
}
1428
1429
/* Set effective uid to 0, return errno */
1430
error_t raise_privileges(void){
1431
error_t old_errno = errno;
1432
error_t ret_errno = 0;
1433
if(seteuid(0) == -1){
1434
ret_errno = errno;
1435
perror_plus("seteuid");
1436
}
1437
errno = old_errno;
1438
return ret_errno;
1439
}
1440
1441
/* Set effective and real user ID to 0. Return errno. */
1442
error_t raise_privileges_permanently(void){
1443
error_t old_errno = errno;
1444
error_t ret_errno = raise_privileges();
1445
if(ret_errno != 0){
1446
errno = old_errno;
1447
return ret_errno;
1448
}
1449
if(setuid(0) == -1){
1450
ret_errno = errno;
1451
perror_plus("seteuid");
1452
}
1453
errno = old_errno;
1454
return ret_errno;
1455
}
1456
1457
/* Set effective user ID to unprivileged saved user ID */
1458
error_t lower_privileges(void){
1459
error_t old_errno = errno;
1460
error_t ret_errno = 0;
1461
if(seteuid(uid) == -1){
1462
ret_errno = errno;
1463
perror_plus("seteuid");
1464
}
1465
errno = old_errno;
1466
return ret_errno;
1467
}
1468
1469
/* Lower privileges permanently */
1470
error_t lower_privileges_permanently(void){
1471
error_t old_errno = errno;
1472
error_t ret_errno = 0;
1473
if(setuid(uid) == -1){
1474
ret_errno = errno;
1475
perror_plus("setuid");
1476
}
1477
errno = old_errno;
1478
return ret_errno;
1479
}
1480
1481
bool run_network_hooks(const char *mode, const char *interface,
1482
const float delay){
1483
struct dirent **direntries;
1484
struct dirent *direntry;
1485
int ret;
1486
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1487
alphasort);
1488
if(numhooks == -1){
1489
if(errno == ENOENT){
1490
if(debug){
1491
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1492
" found\n", hookdir);
1493
}
1494
} else {
1495
perror_plus("scandir");
1496
}
1497
} else {
1498
int devnull = open("/dev/null", O_RDONLY);
1499
for(int i = 0; i < numhooks; i++){
1500
direntry = direntries[i];
1501
char *fullname = NULL;
1502
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1503
if(ret < 0){
1504
perror_plus("asprintf");
1505
continue;
1506
}
1507
if(debug){
1508
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1509
direntry->d_name);
1510
}
1511
pid_t hook_pid = fork();
1512
if(hook_pid == 0){
1513
/* Child */
1514
/* Raise privileges */
1515
raise_privileges_permanently();
1516
/* Set group */
1517
errno = 0;
1518
ret = setgid(0);
1519
if(ret == -1){
1520
perror_plus("setgid");
1521
}
1522
/* Reset supplementary groups */
1523
errno = 0;
1524
ret = setgroups(0, NULL);
1525
if(ret == -1){
1526
perror_plus("setgroups");
1527
}
1528
dup2(devnull, STDIN_FILENO);
1529
close(devnull);
1530
dup2(STDERR_FILENO, STDOUT_FILENO);
1531
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1532
if(ret == -1){
1533
perror_plus("setenv");
1534
_exit(EX_OSERR);
1535
}
1536
ret = setenv("DEVICE", interface, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("MODE", mode, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
char *delaystring;
1552
ret = asprintf(&delaystring, "%f", delay);
1553
if(ret == -1){
1554
perror_plus("asprintf");
1555
_exit(EX_OSERR);
1556
}
1557
ret = setenv("DELAY", delaystring, 1);
1558
if(ret == -1){
1559
free(delaystring);
1560
perror_plus("setenv");
1561
_exit(EX_OSERR);
1562
}
1563
free(delaystring);
1564
if(connect_to != NULL){
1565
ret = setenv("CONNECT", connect_to, 1);
1566
if(ret == -1){
1567
perror_plus("setenv");
1568
_exit(EX_OSERR);
1569
}
1570
}
1571
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1572
perror_plus("execl");
1573
_exit(EXIT_FAILURE);
1574
}
1575
} else {
1576
int status;
1577
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1578
perror_plus("waitpid");
1579
free(fullname);
1580
continue;
1581
}
1582
if(WIFEXITED(status)){
1583
if(WEXITSTATUS(status) != 0){
1584
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1585
" with status %d\n", direntry->d_name,
1586
WEXITSTATUS(status));
1587
free(fullname);
1588
continue;
1589
}
1590
} else if(WIFSIGNALED(status)){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1592
" signal %d\n", direntry->d_name,
1593
WTERMSIG(status));
1594
free(fullname);
1595
continue;
1596
} else {
1597
fprintf_plus(stderr, "Warning: network hook \"%s\""
1598
" crashed\n", direntry->d_name);
1599
free(fullname);
1600
continue;
1601
}
1602
}
1603
free(fullname);
1604
if(debug){
1605
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1606
direntry->d_name);
1607
}
1608
}
1609
close(devnull);
1610
}
1611
return true;
1612
}
1613
1614
error_t bring_up_interface(const char *const interface,
1615
const float delay){
1616
int sd = -1;
1617
error_t old_errno = errno;
1618
error_t ret_errno = 0;
1619
int ret, ret_setflags;
1620
struct ifreq network;
1621
unsigned int if_index = if_nametoindex(interface);
1622
if(if_index == 0){
1623
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1624
errno = old_errno;
1625
return ENXIO;
1626
}
1627
1628
if(quit_now){
1629
errno = old_errno;
1630
return EINTR;
1631
}
1632
1633
if(not interface_is_up(interface)){
1634
if(not get_flags(interface, &network) and debug){
1635
ret_errno = errno;
1636
fprintf_plus(stderr, "Failed to get flags for interface "
1637
"\"%s\"\n", interface);
1638
return ret_errno;
1639
}
1640
network.ifr_flags |= IFF_UP;
1641
1642
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
if(sd < 0){
1644
ret_errno = errno;
1645
perror_plus("socket");
1646
errno = old_errno;
1647
return ret_errno;
1648
}
1649
1650
if(quit_now){
1651
close(sd);
1652
errno = old_errno;
1653
return EINTR;
1654
}
1655
1656
if(debug){
1657
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1658
interface);
1659
}
1660
1661
/* Raise priviliges */
1662
raise_privileges();
1663
1664
#ifdef __linux__
1665
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1666
messages about the network interface to mess up the prompt */
1667
int ret_linux = klogctl(8, NULL, 5);
1668
bool restore_loglevel = true;
1669
if(ret_linux == -1){
1670
restore_loglevel = false;
1671
perror_plus("klogctl");
1672
}
1673
#endif /* __linux__ */
1674
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1675
ret_errno = errno;
1676
#ifdef __linux__
1677
if(restore_loglevel){
1678
ret_linux = klogctl(7, NULL, 0);
1679
if(ret_linux == -1){
1680
perror_plus("klogctl");
1681
}
1682
}
1683
#endif /* __linux__ */
1684
1685
/* Lower privileges */
1686
lower_privileges();
1687
1688
/* Close the socket */
1689
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1690
if(ret == -1){
1691
perror_plus("close");
1692
}
1693
1694
if(ret_setflags == -1){
1695
errno = ret_errno;
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1697
errno = old_errno;
1698
return ret_errno;
1699
}
1700
} else if(debug){
1701
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1702
interface);
1703
}
1704
1705
/* Sleep checking until interface is running.
1706
Check every 0.25s, up to total time of delay */
1707
for(int i=0; i < delay * 4; i++){
1708
if(interface_is_running(interface)){
1709
break;
1710
}
1711
struct timespec sleeptime = { .tv_nsec = 250000000 };
1712
ret = nanosleep(&sleeptime, NULL);
1713
if(ret == -1 and errno != EINTR){
1714
perror_plus("nanosleep");
1715
}
1716
}
1717
1718
errno = old_errno;
1719
return 0;
1720
}
1721
1722
error_t take_down_interface(const char *const interface){
1723
int sd = -1;
1724
error_t old_errno = errno;
1725
error_t ret_errno = 0;
1726
int ret, ret_setflags;
1727
struct ifreq network;
1728
unsigned int if_index = if_nametoindex(interface);
1729
if(if_index == 0){
1730
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1731
errno = old_errno;
1732
return ENXIO;
1733
}
1734
if(interface_is_up(interface)){
1735
if(not get_flags(interface, &network) and debug){
1736
ret_errno = errno;
1737
fprintf_plus(stderr, "Failed to get flags for interface "
1738
"\"%s\"\n", interface);
1739
return ret_errno;
1740
}
1741
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1742
1743
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1744
if(sd < 0){
1745
ret_errno = errno;
1746
perror_plus("socket");
1747
errno = old_errno;
1748
return ret_errno;
1749
}
1750
1751
if(debug){
1752
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1753
interface);
1754
}
1755
1756
/* Raise priviliges */
1757
raise_privileges();
1758
1759
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1760
ret_errno = errno;
1761
1762
/* Lower privileges */
1763
lower_privileges();
1764
1765
/* Close the socket */
1766
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1767
if(ret == -1){
1768
perror_plus("close");
1769
}
1770
1771
if(ret_setflags == -1){
1772
errno = ret_errno;
1773
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1774
errno = old_errno;
1775
return ret_errno;
1776
}
1777
} else if(debug){
1778
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1779
interface);
1780
}
1781
1782
errno = old_errno;
1783
return 0;
976
1784
}
977
1785
978
1786
int main(int argc, char *argv[]){
1787
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1788
.priority = "SECURE256:!CTYPE-X.509:"
1789
"+CTYPE-OPENPGP", .current_server = NULL,
1790
.interfaces = NULL, .interfaces_size = 0 };
979
1791
AvahiSServiceBrowser *sb = NULL;
980
int error;
1792
error_t ret_errno;
981
1793
int ret;
982
1794
intmax_t tmpmax;
983
1795
char *tmp;
984
1796
int exitcode = EXIT_SUCCESS;
985
const char *interface = "eth0";
986
struct ifreq network;
987
int sd = -1;
988
bool take_down_interface = false;
989
uid_t uid;
990
gid_t gid;
991
char *connect_to = NULL;
1797
char *interfaces_to_take_down = NULL;
1798
size_t interfaces_to_take_down_size = 0;
992
1799
char tempdir[] = "/tmp/mandosXXXXXX";
993
1800
bool tempdir_created = false;
994
1801
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
995
1802
const char *seckey = PATHDIR "/" SECKEY;
996
1803
const char *pubkey = PATHDIR "/" PUBKEY;
1804
char *interfaces_hooks = NULL;
1805
size_t interfaces_hooks_size = 0;
997
1806
998
1807
bool gnutls_initialized = false;
999
1808
bool gpgme_initialized = false;
1000
1809
float delay = 2.5f;
1810
double retry_interval = 10; /* 10s between trying a server and
1811
retrying the same server again */
1001
1812
1002
1813
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1003
1814
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1009
1820
errno = 0;
1010
1821
ret = setgid(gid);
1011
1822
if(ret == -1){
1012
perror("setgid");
1823
perror_plus("setgid");
1013
1824
}
1014
1825
1015
1826
/* Lower user privileges (temporarily) */
1016
1827
errno = 0;
1017
1828
ret = seteuid(uid);
1018
1829
if(ret == -1){
1019
perror("seteuid");
1830
perror_plus("seteuid");
1020
1831
}
1021
1832
1022
1833
if(quit_now){
1057
1868
.arg = "SECONDS",
1058
1869
.doc = "Maximum delay to wait for interface startup",
1059
1870
.group = 2 },
1871
{ .name = "retry", .key = 132,
1872
.arg = "SECONDS",
1873
.doc = "Retry interval used when denied by the Mandos server",
1874
.group = 2 },
1875
{ .name = "network-hook-dir", .key = 133,
1876
.arg = "DIR",
1877
.doc = "Directory where network hooks are located",
1878
.group = 2 },
1060
1879
/*
1061
1880
* These reproduce what we would get without ARGP_NO_HELP
1062
1881
*/
1080
1899
connect_to = arg;
1081
1900
break;
1082
1901
case 'i': /* --interface */
1083
interface = arg;
1902
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1903
arg, (int)',');
1904
if(ret_errno != 0){
1905
argp_error(state, "%s", strerror(ret_errno));
1906
}
1084
1907
break;
1085
1908
case 's': /* --seckey */
1086
1909
seckey = arg;
1106
1929
if(errno != 0 or tmp == arg or *tmp != '\0'){
1107
1930
argp_error(state, "Bad delay");
1108
1931
}
1932
case 132: /* --retry */
1933
errno = 0;
1934
retry_interval = strtod(arg, &tmp);
1935
if(errno != 0 or tmp == arg or *tmp != '\0'
1936
or (retry_interval * 1000) > INT_MAX
1937
or retry_interval < 0){
1938
argp_error(state, "Bad retry interval");
1939
}
1940
break;
1941
case 133: /* --network-hook-dir */
1942
hookdir = arg;
1109
1943
break;
1110
1944
/*
1111
1945
* These reproduce what we would get without ARGP_NO_HELP
1118
1952
argp_state_help(state, state->out_stream,
1119
1953
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1120
1954
case 'V': /* --version */
1121
fprintf(state->out_stream, "%s\n", argp_program_version);
1955
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1122
1956
exit(argp_err_exit_status);
1123
1957
break;
1124
1958
default:
1139
1973
case ENOMEM:
1140
1974
default:
1141
1975
errno = ret;
1142
perror("argp_parse");
1976
perror_plus("argp_parse");
1143
1977
exitcode = EX_OSERR;
1144
1978
goto end;
1145
1979
case EINVAL:
1147
1981
goto end;
1148
1982
}
1149
1983
}
1984
1985
{
1986
/* Work around Debian bug #633582:
1987
<http://bugs.debian.org/633582> */
1988
1989
/* Re-raise priviliges */
1990
if(raise_privileges() == 0){
1991
struct stat st;
1992
1993
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1994
int seckey_fd = open(seckey, O_RDONLY);
1995
if(seckey_fd == -1){
1996
perror_plus("open");
1997
} else {
1998
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1999
if(ret == -1){
2000
perror_plus("fstat");
2001
} else {
2002
if(S_ISREG(st.st_mode)
2003
and st.st_uid == 0 and st.st_gid == 0){
2004
ret = fchown(seckey_fd, uid, gid);
2005
if(ret == -1){
2006
perror_plus("fchown");
2007
}
2008
}
2009
}
2010
TEMP_FAILURE_RETRY(close(seckey_fd));
2011
}
2012
}
2013
2014
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2015
int pubkey_fd = open(pubkey, O_RDONLY);
2016
if(pubkey_fd == -1){
2017
perror_plus("open");
2018
} else {
2019
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2020
if(ret == -1){
2021
perror_plus("fstat");
2022
} else {
2023
if(S_ISREG(st.st_mode)
2024
and st.st_uid == 0 and st.st_gid == 0){
2025
ret = fchown(pubkey_fd, uid, gid);
2026
if(ret == -1){
2027
perror_plus("fchown");
2028
}
2029
}
2030
}
2031
TEMP_FAILURE_RETRY(close(pubkey_fd));
2032
}
2033
}
2034
2035
/* Lower privileges */
2036
lower_privileges();
2037
}
2038
}
2039
2040
/* Remove invalid interface names (except "none") */
2041
{
2042
char *interface = NULL;
2043
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2044
interface))){
2045
if(strcmp(interface, "none") != 0
2046
and if_nametoindex(interface) == 0){
2047
if(interface[0] != '\0'){
2048
fprintf_plus(stderr, "Not using nonexisting interface"
2049
" \"%s\"\n", interface);
2050
}
2051
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2052
interface = NULL;
2053
}
2054
}
2055
}
2056
2057
/* Run network hooks */
2058
{
2059
if(mc.interfaces != NULL){
2060
interfaces_hooks = malloc(mc.interfaces_size);
2061
if(interfaces_hooks == NULL){
2062
perror_plus("malloc");
2063
goto end;
2064
}
2065
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2066
interfaces_hooks_size = mc.interfaces_size;
2067
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2068
(int)',');
2069
}
2070
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2071
interfaces_hooks : "", delay)){
2072
goto end;
2073
}
2074
}
1150
2075
1151
2076
if(not debug){
1152
2077
avahi_set_log_function(empty_log);
1156
2081
from the signal handler */
1157
2082
/* Initialize the pseudo-RNG for Avahi */
1158
2083
srand((unsigned int) time(NULL));
1159
mc.simple_poll = avahi_simple_poll_new();
1160
if(mc.simple_poll == NULL){
1161
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1162
exitcode = EXIT_FAILURE;
2084
simple_poll = avahi_simple_poll_new();
2085
if(simple_poll == NULL){
2086
fprintf_plus(stderr,
2087
"Avahi: Failed to create simple poll object.\n");
2088
exitcode = EX_UNAVAILABLE;
1163
2089
goto end;
1164
2090
}
1165
2091
1166
2092
sigemptyset(&sigterm_action.sa_mask);
1167
2093
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1168
2094
if(ret == -1){
1169
perror("sigaddset");
1170
exitcode = EXIT_FAILURE;
2095
perror_plus("sigaddset");
2096
exitcode = EX_OSERR;
1171
2097
goto end;
1172
2098
}
1173
2099
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1174
2100
if(ret == -1){
1175
perror("sigaddset");
1176
exitcode = EXIT_FAILURE;
2101
perror_plus("sigaddset");
2102
exitcode = EX_OSERR;
1177
2103
goto end;
1178
2104
}
1179
2105
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1180
2106
if(ret == -1){
1181
perror("sigaddset");
1182
exitcode = EXIT_FAILURE;
2107
perror_plus("sigaddset");
2108
exitcode = EX_OSERR;
1183
2109
goto end;
1184
2110
}
1185
2111
/* Need to check if the handler is SIG_IGN before handling:
1188
2114
*/
1189
2115
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1190
2116
if(ret == -1){
1191
perror("sigaction");
1192
return EXIT_FAILURE;
2117
perror_plus("sigaction");
2118
return EX_OSERR;
1193
2119
}
1194
2120
if(old_sigterm_action.sa_handler != SIG_IGN){
1195
2121
ret = sigaction(SIGINT, &sigterm_action, NULL);
1196
2122
if(ret == -1){
1197
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
2123
perror_plus("sigaction");
2124
exitcode = EX_OSERR;
1199
2125
goto end;
1200
2126
}
1201
2127
}
1202
2128
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1203
2129
if(ret == -1){
1204
perror("sigaction");
1205
return EXIT_FAILURE;
2130
perror_plus("sigaction");
2131
return EX_OSERR;
1206
2132
}
1207
2133
if(old_sigterm_action.sa_handler != SIG_IGN){
1208
2134
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1209
2135
if(ret == -1){
1210
perror("sigaction");
1211
exitcode = EXIT_FAILURE;
2136
perror_plus("sigaction");
2137
exitcode = EX_OSERR;
1212
2138
goto end;
1213
2139
}
1214
2140
}
1215
2141
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1216
2142
if(ret == -1){
1217
perror("sigaction");
1218
return EXIT_FAILURE;
2143
perror_plus("sigaction");
2144
return EX_OSERR;
1219
2145
}
1220
2146
if(old_sigterm_action.sa_handler != SIG_IGN){
1221
2147
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1222
2148
if(ret == -1){
1223
perror("sigaction");
1224
exitcode = EXIT_FAILURE;
1225
goto end;
1226
}
1227
}
1228
1229
/* If the interface is down, bring it up */
1230
if(interface[0] != '\0'){
1231
if_index = (AvahiIfIndex) if_nametoindex(interface);
1232
if(if_index == 0){
1233
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1234
exitcode = EXIT_FAILURE;
1235
goto end;
1236
}
1237
1238
if(quit_now){
1239
goto end;
1240
}
1241
1242
/* Re-raise priviliges */
1243
errno = 0;
1244
ret = seteuid(0);
1245
if(ret == -1){
1246
perror("seteuid");
1247
}
1248
1249
#ifdef __linux__
1250
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1251
messages about the network interface to mess up the prompt */
1252
ret = klogctl(8, NULL, 5);
1253
bool restore_loglevel = true;
1254
if(ret == -1){
1255
restore_loglevel = false;
1256
perror("klogctl");
1257
}
1258
#endif /* __linux__ */
1259
1260
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1261
if(sd < 0){
1262
perror("socket");
1263
exitcode = EXIT_FAILURE;
1264
#ifdef __linux__
1265
if(restore_loglevel){
1266
ret = klogctl(7, NULL, 0);
1267
if(ret == -1){
1268
perror("klogctl");
1269
}
1270
}
1271
#endif /* __linux__ */
1272
/* Lower privileges */
1273
errno = 0;
1274
ret = seteuid(uid);
1275
if(ret == -1){
1276
perror("seteuid");
1277
}
1278
goto end;
1279
}
1280
strcpy(network.ifr_name, interface);
1281
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1282
if(ret == -1){
1283
perror("ioctl SIOCGIFFLAGS");
1284
#ifdef __linux__
1285
if(restore_loglevel){
1286
ret = klogctl(7, NULL, 0);
1287
if(ret == -1){
1288
perror("klogctl");
1289
}
1290
}
1291
#endif /* __linux__ */
1292
exitcode = EXIT_FAILURE;
1293
/* Lower privileges */
1294
errno = 0;
1295
ret = seteuid(uid);
1296
if(ret == -1){
1297
perror("seteuid");
1298
}
1299
goto end;
1300
}
1301
if((network.ifr_flags & IFF_UP) == 0){
1302
network.ifr_flags |= IFF_UP;
1303
take_down_interface = true;
1304
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1305
if(ret == -1){
1306
take_down_interface = false;
1307
perror("ioctl SIOCSIFFLAGS");
1308
exitcode = EXIT_FAILURE;
1309
#ifdef __linux__
1310
if(restore_loglevel){
1311
ret = klogctl(7, NULL, 0);
1312
if(ret == -1){
1313
perror("klogctl");
2149
perror_plus("sigaction");
2150
exitcode = EX_OSERR;
2151
goto end;
2152
}
2153
}
2154
2155
/* If no interfaces were specified, make a list */
2156
if(mc.interfaces == NULL){
2157
struct dirent **direntries;
2158
/* Look for any good interfaces */
2159
ret = scandir(sys_class_net, &direntries, good_interface,
2160
alphasort);
2161
if(ret >= 1){
2162
/* Add all found interfaces to interfaces list */
2163
for(int i = 0; i < ret; ++i){
2164
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2165
direntries[i]->d_name);
2166
if(ret_errno != 0){
2167
perror_plus("argz_add");
2168
continue;
2169
}
2170
if(debug){
2171
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2172
direntries[i]->d_name);
2173
}
2174
}
2175
free(direntries);
2176
} else {
2177
free(direntries);
2178
fprintf_plus(stderr, "Could not find a network interface\n");
2179
exitcode = EXIT_FAILURE;
2180
goto end;
2181
}
2182
}
2183
2184
/* Bring up interfaces which are down */
2185
{
2186
char *interface = NULL;
2187
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2188
interface))){
2189
/* If interface name is "none", stop bringing up interfaces.
2190
Also remove all instances of "none" from the list */
2191
if(strcmp(interface, "none") == 0){
2192
argz_delete(&mc.interfaces, &mc.interfaces_size,
2193
interface);
2194
interface = NULL;
2195
while((interface = argz_next(mc.interfaces,
2196
mc.interfaces_size, interface))){
2197
if(strcmp(interface, "none") == 0){
2198
argz_delete(&mc.interfaces, &mc.interfaces_size,
2199
interface);
2200
interface = NULL;
1314
2201
}
1315
2202
}
1316
#endif /* __linux__ */
1317
/* Lower privileges */
1318
errno = 0;
1319
ret = seteuid(uid);
1320
if(ret == -1){
1321
perror("seteuid");
1322
}
1323
goto end;
1324
}
1325
}
1326
/* sleep checking until interface is running */
1327
for(int i=0; i < delay * 4; i++){
1328
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1329
if(ret == -1){
1330
perror("ioctl SIOCGIFFLAGS");
1331
} else if(network.ifr_flags & IFF_RUNNING){
1332
2203
break;
1333
2204
}
1334
struct timespec sleeptime = { .tv_nsec = 250000000 };
1335
ret = nanosleep(&sleeptime, NULL);
1336
if(ret == -1 and errno != EINTR){
1337
perror("nanosleep");
1338
}
1339
}
1340
if(not take_down_interface){
1341
/* We won't need the socket anymore */
1342
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1343
if(ret == -1){
1344
perror("close");
1345
}
1346
}
1347
#ifdef __linux__
1348
if(restore_loglevel){
1349
/* Restores kernel loglevel to default */
1350
ret = klogctl(7, NULL, 0);
1351
if(ret == -1){
1352
perror("klogctl");
1353
}
1354
}
1355
#endif /* __linux__ */
1356
/* Lower privileges */
1357
errno = 0;
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
}
1370
}
2205
bool interface_was_up = interface_is_up(interface);
2206
ret = bring_up_interface(interface, delay);
2207
if(not interface_was_up){
2208
if(ret != 0){
2209
errno = ret;
2210
perror_plus("Failed to bring up interface");
2211
} else {
2212
ret_errno = argz_add(&interfaces_to_take_down,
2213
&interfaces_to_take_down_size,
2214
interface);
2215
}
2216
}
2217
}
2218
if(debug and (interfaces_to_take_down == NULL)){
2219
fprintf_plus(stderr, "No interfaces were brought up\n");
2220
}
2221
}
2222
2223
/* If we only got one interface, explicitly use only that one */
2224
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2225
if(debug){
2226
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2227
mc.interfaces);
2228
}
2229
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1371
2230
}
1372
2231
1373
2232
if(quit_now){
1374
2233
goto end;
1375
2234
}
1376
2235
1377
ret = init_gnutls_global(pubkey, seckey);
2236
ret = init_gnutls_global(pubkey, seckey, &mc);
1378
2237
if(ret == -1){
1379
fprintf(stderr, "init_gnutls_global failed\n");
1380
exitcode = EXIT_FAILURE;
2238
fprintf_plus(stderr, "init_gnutls_global failed\n");
2239
exitcode = EX_UNAVAILABLE;
1381
2240
goto end;
1382
2241
} else {
1383
2242
gnutls_initialized = true;
1387
2246
goto end;
1388
2247
}
1389
2248
2249
if(mkdtemp(tempdir) == NULL){
2250
perror_plus("mkdtemp");
2251
goto end;
2252
}
1390
2253
tempdir_created = true;
1391
if(mkdtemp(tempdir) == NULL){
1392
tempdir_created = false;
1393
perror("mkdtemp");
1394
goto end;
1395
}
1396
2254
1397
2255
if(quit_now){
1398
2256
goto end;
1399
2257
}
1400
2258
1401
if(not init_gpgme(pubkey, seckey, tempdir)){
1402
fprintf(stderr, "init_gpgme failed\n");
1403
exitcode = EXIT_FAILURE;
2259
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2260
fprintf_plus(stderr, "init_gpgme failed\n");
2261
exitcode = EX_UNAVAILABLE;
1404
2262
goto end;
1405
2263
} else {
1406
2264
gpgme_initialized = true;
1414
2272
/* Connect directly, do not use Zeroconf */
1415
2273
/* (Mainly meant for debugging) */
1416
2274
char *address = strrchr(connect_to, ':');
2275
1417
2276
if(address == NULL){
1418
fprintf(stderr, "No colon in address\n");
1419
exitcode = EXIT_FAILURE;
2277
fprintf_plus(stderr, "No colon in address\n");
2278
exitcode = EX_USAGE;
1420
2279
goto end;
1421
2280
}
1422
2281
1424
2283
goto end;
1425
2284
}
1426
2285
1427
uint16_t port;
2286
in_port_t port;
1428
2287
errno = 0;
1429
2288
tmpmax = strtoimax(address+1, &tmp, 10);
1430
2289
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1431
or tmpmax != (uint16_t)tmpmax){
1432
fprintf(stderr, "Bad port number\n");
1433
exitcode = EXIT_FAILURE;
2290
or tmpmax != (in_port_t)tmpmax){
2291
fprintf_plus(stderr, "Bad port number\n");
2292
exitcode = EX_USAGE;
1434
2293
goto end;
1435
2294
}
1436
2295
1437
2296
if(quit_now){
1438
2297
goto end;
1439
2298
}
1440
2299
1441
port = (uint16_t)tmpmax;
2300
port = (in_port_t)tmpmax;
1442
2301
*address = '\0';
1443
address = connect_to;
1444
2302
/* Colon in address indicates IPv6 */
1445
2303
int af;
1446
if(strchr(address, ':') != NULL){
2304
if(strchr(connect_to, ':') != NULL){
1447
2305
af = AF_INET6;
2306
/* Accept [] around IPv6 address - see RFC 5952 */
2307
if(connect_to[0] == '[' and address[-1] == ']')
2308
{
2309
connect_to++;
2310
address[-1] = '\0';
2311
}
1448
2312
} else {
1449
2313
af = AF_INET;
1450
2314
}
2315
address = connect_to;
1451
2316
1452
2317
if(quit_now){
1453
2318
goto end;
1454
2319
}
1455
2320
1456
ret = start_mandos_communication(address, port, if_index, af);
1457
if(ret < 0){
1458
exitcode = EXIT_FAILURE;
1459
} else {
2321
while(not quit_now){
2322
ret = start_mandos_communication(address, port, if_index, af,
2323
&mc);
2324
if(quit_now or ret == 0){
2325
break;
2326
}
2327
if(debug){
2328
fprintf_plus(stderr, "Retrying in %d seconds\n",
2329
(int)retry_interval);
2330
}
2331
sleep((int)retry_interval);
2332
}
2333
2334
if (not quit_now){
1460
2335
exitcode = EXIT_SUCCESS;
1461
2336
}
2337
1462
2338
goto end;
1463
2339
}
1464
2340
1476
2352
config.publish_domain = 0;
1477
2353
1478
2354
/* Allocate a new server */
1479
mc.server = avahi_server_new(avahi_simple_poll_get
1480
(mc.simple_poll), &config, NULL,
1481
NULL, &error);
2355
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2356
&config, NULL, NULL, &ret_errno);
1482
2357
1483
2358
/* Free the Avahi configuration data */
1484
2359
avahi_server_config_free(&config);
1486
2361
1487
2362
/* Check if creating the Avahi server object succeeded */
1488
2363
if(mc.server == NULL){
1489
fprintf(stderr, "Failed to create Avahi server: %s\n",
1490
avahi_strerror(error));
1491
exitcode = EXIT_FAILURE;
2364
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2365
avahi_strerror(ret_errno));
2366
exitcode = EX_UNAVAILABLE;
1492
2367
goto end;
1493
2368
}
1494
2369
1499
2374
/* Create the Avahi service browser */
1500
2375
sb = avahi_s_service_browser_new(mc.server, if_index,
1501
2376
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1502
NULL, 0, browse_callback, NULL);
2377
NULL, 0, browse_callback,
2378
(void *)&mc);
1503
2379
if(sb == NULL){
1504
fprintf(stderr, "Failed to create service browser: %s\n",
1505
avahi_strerror(avahi_server_errno(mc.server)));
1506
exitcode = EXIT_FAILURE;
2380
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2381
avahi_strerror(avahi_server_errno(mc.server)));
2382
exitcode = EX_UNAVAILABLE;
1507
2383
goto end;
1508
2384
}
1509
2385
1514
2390
/* Run the main loop */
1515
2391
1516
2392
if(debug){
1517
fprintf(stderr, "Starting Avahi loop search\n");
1518
}
1519
1520
avahi_simple_poll_loop(mc.simple_poll);
2393
fprintf_plus(stderr, "Starting Avahi loop search\n");
2394
}
2395
2396
ret = avahi_loop_with_timeout(simple_poll,
2397
(int)(retry_interval * 1000), &mc);
2398
if(debug){
2399
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2400
(ret == 0) ? "successfully" : "with error");
2401
}
1521
2402
1522
2403
end:
1523
2404
1524
2405
if(debug){
1525
fprintf(stderr, "%s exiting\n", argv[0]);
2406
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1526
2407
}
1527
2408
1528
2409
/* Cleanup things */
2410
free(mc.interfaces);
2411
1529
2412
if(sb != NULL)
1530
2413
avahi_s_service_browser_free(sb);
1531
2414
1532
2415
if(mc.server != NULL)
1533
2416
avahi_server_free(mc.server);
1534
2417
1535
if(mc.simple_poll != NULL)
1536
avahi_simple_poll_free(mc.simple_poll);
2418
if(simple_poll != NULL)
2419
avahi_simple_poll_free(simple_poll);
1537
2420
1538
2421
if(gnutls_initialized){
1539
2422
gnutls_certificate_free_credentials(mc.cred);
1545
2428
gpgme_release(mc.ctx);
1546
2429
}
1547
2430
1548
/* Take down the network interface */
1549
if(take_down_interface){
1550
/* Re-raise priviliges */
1551
errno = 0;
1552
ret = seteuid(0);
1553
if(ret == -1){
1554
perror("seteuid");
2431
/* Cleans up the circular linked list of Mandos servers the client
2432
has seen */
2433
if(mc.current_server != NULL){
2434
mc.current_server->prev->next = NULL;
2435
while(mc.current_server != NULL){
2436
server *next = mc.current_server->next;
2437
free(mc.current_server);
2438
mc.current_server = next;
1555
2439
}
1556
if(geteuid() == 0){
1557
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1558
if(ret == -1){
1559
perror("ioctl SIOCGIFFLAGS");
1560
} else if(network.ifr_flags & IFF_UP) {
1561
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1562
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1563
if(ret == -1){
1564
perror("ioctl SIOCSIFFLAGS");
2440
}
2441
2442
/* Re-raise priviliges */
2443
{
2444
raise_privileges();
2445
2446
/* Run network hooks */
2447
run_network_hooks("stop", interfaces_hooks != NULL ?
2448
interfaces_hooks : "", delay);
2449
2450
/* Take down the network interfaces which were brought up */
2451
{
2452
char *interface = NULL;
2453
while((interface=argz_next(interfaces_to_take_down,
2454
interfaces_to_take_down_size,
2455
interface))){
2456
ret_errno = take_down_interface(interface);
2457
if(ret_errno != 0){
2458
errno = ret_errno;
2459
perror_plus("Failed to take down interface");
1565
2460
}
1566
2461
}
1567
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1568
if(ret == -1){
1569
perror("close");
1570
}
1571
/* Lower privileges permanently */
1572
errno = 0;
1573
ret = setuid(uid);
1574
if(ret == -1){
1575
perror("setuid");
2462
if(debug and (interfaces_to_take_down == NULL)){
2463
fprintf_plus(stderr, "No interfaces needed to be taken"
2464
" down\n");
1576
2465
}
1577
2466
}
2467
2468
lower_privileges_permanently();
1578
2469
}
1579
2470
1580
/* Removes the temp directory used by GPGME */
2471
free(interfaces_to_take_down);
2472
free(interfaces_hooks);
2473
2474
/* Removes the GPGME temp directory and all files inside */
1581
2475
if(tempdir_created){
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
}
2476
struct dirent **direntries = NULL;
2477
struct dirent *direntry = NULL;
2478
int numentries = scandir(tempdir, &direntries, notdotentries,
2479
alphasort);
2480
if (numentries > 0){
2481
for(int i = 0; i < numentries; i++){
2482
direntry = direntries[i];
1602
2483
char *fullname = NULL;
1603
2484
ret = asprintf(&fullname, "%s/%s", tempdir,
1604
2485
direntry->d_name);
1605
2486
if(ret < 0){
1606
perror("asprintf");
2487
perror_plus("asprintf");
1607
2488
continue;
1608
2489
}
1609
2490
ret = remove(fullname);
1610
2491
if(ret == -1){
1611
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1612
strerror(errno));
2492
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2493
strerror(errno));
1613
2494
}
1614
2495
free(fullname);
1615
2496
}
1616
closedir(d);
2497
}
2498
2499
/* need to clean even if 0 because man page doesn't specify */
2500
free(direntries);
2501
if (numentries == -1){
2502
perror_plus("scandir");
1617
2503
}
1618
2504
ret = rmdir(tempdir);
1619
2505
if(ret == -1 and errno != ENOENT){
1620
perror("rmdir");
2506
perror_plus("rmdir");
1621
2507
}
1622
2508
}
1623
2509
1628
2514
&old_sigterm_action,
1629
2515
NULL));
1630
2516
if(ret == -1){
1631
perror("sigaction");
2517
perror_plus("sigaction");
1632
2518
}
1633
2519
do {
1634
2520
ret = raise(signal_received);
1635
2521
} while(ret != 0 and errno == EINTR);
1636
2522
if(ret != 0){
1637
perror("raise");
2523
perror_plus("raise");
1638
2524
abort();
1639
2525
}
1640
2526
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0