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- Committer: Teddy Hogeborn
- Date: 2010-10-13 06:12:52 UTC
- Revision ID: teddy@fukt.bsnet.se-20101013061252-3a918xedja5caya8
* debian/mandos-client.lintian-overrides: Added plugins.d/plymouth.
- 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 © 2008-2010 Teddy Hogeborn
13
* Copyright © 2008-2010 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <errno.h> /* perror(), errno,
65
program_invocation_short_name */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
66
66
#include <time.h> /* nanosleep(), time(), sleep() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
79
79
argp_state, struct argp,
84
84
raise() */
85
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
WEXITSTATUS(), WTERMSIG() */
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
94
87
95
88
#ifdef __linux__
96
89
#include <sys/klog.h> /* klogctl() */
114
107
init_gnutls_session(),
115
108
GNUTLS_* */
116
109
#include <gnutls/openpgp.h>
117
/* gnutls_certificate_set_openpgp_key_file(),
118
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
119
112
120
113
/* GPGME */
121
114
#include <gpgme.h> /* All GPGME types, constants and
129
122
#define PATHDIR "/conf/conf.d/mandos"
130
123
#define SECKEY "seckey.txt"
131
124
#define PUBKEY "pubkey.txt"
132
#define HOOKDIR "/lib/mandos/network-hooks.d"
133
125
134
126
bool debug = false;
135
127
static const char mandos_protocol_version[] = "1";
136
128
const char *argp_program_version = "mandos-client " VERSION;
137
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
138
130
static const char sys_class_net[] = "/sys/class/net";
139
131
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;
154
132
155
133
/* Used for passing in values through the Avahi callback functions */
156
134
typedef struct {
135
AvahiSimplePoll *simple_poll;
157
136
AvahiServer *server;
158
137
gnutls_certificate_credentials_t cred;
159
138
unsigned int dh_bits;
160
139
gnutls_dh_params_t dh_params;
161
140
const char *priority;
162
141
gpgme_ctx_t ctx;
163
server *current_server;
164
char *interfaces;
165
size_t interfaces_size;
166
142
} mandos_context;
167
143
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
144
/* global context so signal handler can reach it*/
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
146
.dh_bits = 1024, .priority = "SECURE256"
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
170
148
171
149
sig_atomic_t quit_now = 0;
172
150
int signal_received = 0;
173
151
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 (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
}
192
193
152
/*
194
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
195
154
* bytes. "buffer_capacity" is how much is currently allocated,
196
155
* "buffer_length" is how much is already used.
197
156
*/
198
157
size_t incbuffer(char **buffer, size_t buffer_length,
199
size_t buffer_capacity){
158
size_t buffer_capacity){
200
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(new_buf == NULL){
203
int old_errno = errno;
204
free(*buffer);
205
errno = old_errno;
206
*buffer = NULL;
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
161
if(buffer == NULL){
207
162
return 0;
208
163
}
209
*buffer = new_buf;
210
164
buffer_capacity += BUFFER_SIZE;
211
165
}
212
166
return buffer_capacity;
213
167
}
214
168
215
/* Add server to set of servers to retry periodically */
216
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
217
int af, server **current_server){
218
int ret;
219
server *new_server = malloc(sizeof(server));
220
if(new_server == NULL){
221
perror_plus("malloc");
222
return false;
223
}
224
*new_server = (server){ .ip = strdup(ip),
225
.port = port,
226
.if_index = if_index,
227
.af = af };
228
if(new_server->ip == NULL){
229
perror_plus("strdup");
230
return false;
231
}
232
/* Special case of first server */
233
if(*current_server == NULL){
234
new_server->next = new_server;
235
new_server->prev = new_server;
236
*current_server = new_server;
237
/* Place the new server last in the list */
238
} else {
239
new_server->next = *current_server;
240
new_server->prev = (*current_server)->prev;
241
new_server->prev->next = new_server;
242
(*current_server)->prev = new_server;
243
}
244
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
245
if(ret == -1){
246
perror_plus("clock_gettime");
247
return false;
248
}
249
return true;
250
}
251
252
169
/*
253
170
* Initialize GPGME.
254
171
*/
255
static bool init_gpgme(const char *seckey, const char *pubkey,
256
const char *tempdir, mandos_context *mc){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
257
174
gpgme_error_t rc;
258
175
gpgme_engine_info_t engine_info;
259
176
177
260
178
/*
261
179
* Helper function to insert pub and seckey to the engine keyring.
262
180
*/
267
185
268
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
269
187
if(fd == -1){
270
perror_plus("open");
188
perror("open");
271
189
return false;
272
190
}
273
191
274
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
275
193
if(rc != GPG_ERR_NO_ERROR){
276
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
194
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
195
gpgme_strsource(rc), gpgme_strerror(rc));
278
196
return false;
279
197
}
280
198
281
rc = gpgme_op_import(mc->ctx, pgp_data);
199
rc = gpgme_op_import(mc.ctx, pgp_data);
282
200
if(rc != GPG_ERR_NO_ERROR){
283
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
285
203
return false;
286
204
}
287
205
288
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
289
207
if(ret == -1){
290
perror_plus("close");
208
perror("close");
291
209
}
292
210
gpgme_data_release(pgp_data);
293
211
return true;
294
212
}
295
213
296
214
if(debug){
297
fprintf_plus(stderr, "Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
298
216
}
299
217
300
218
/* Init GPGME */
301
219
gpgme_check_version(NULL);
302
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
303
221
if(rc != GPG_ERR_NO_ERROR){
304
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
305
gpgme_strsource(rc), gpgme_strerror(rc));
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
306
224
return false;
307
225
}
308
226
309
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
310
228
rc = gpgme_get_engine_info(&engine_info);
311
229
if(rc != GPG_ERR_NO_ERROR){
312
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
313
gpgme_strsource(rc), gpgme_strerror(rc));
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
314
232
return false;
315
233
}
316
234
while(engine_info != NULL){
322
240
engine_info = engine_info->next;
323
241
}
324
242
if(engine_info == NULL){
325
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
326
tempdir);
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
327
244
return false;
328
245
}
329
246
330
247
/* Create new GPGME "context" */
331
rc = gpgme_new(&(mc->ctx));
248
rc = gpgme_new(&(mc.ctx));
332
249
if(rc != GPG_ERR_NO_ERROR){
333
fprintf_plus(stderr, "Mandos plugin mandos-client: "
334
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
335
gpgme_strerror(rc));
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
336
252
return false;
337
253
}
338
254
349
265
*/
350
266
static ssize_t pgp_packet_decrypt(const char *cryptotext,
351
267
size_t crypto_size,
352
char **plaintext,
353
mandos_context *mc){
268
char **plaintext){
354
269
gpgme_data_t dh_crypto, dh_plain;
355
270
gpgme_error_t rc;
356
271
ssize_t ret;
358
273
ssize_t plaintext_length = 0;
359
274
360
275
if(debug){
361
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
362
277
}
363
278
364
279
/* Create new GPGME data buffer from memory cryptotext */
365
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
366
281
0);
367
282
if(rc != GPG_ERR_NO_ERROR){
368
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
369
gpgme_strsource(rc), gpgme_strerror(rc));
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
370
285
return -1;
371
286
}
372
287
373
288
/* Create new empty GPGME data buffer for the plaintext */
374
289
rc = gpgme_data_new(&dh_plain);
375
290
if(rc != GPG_ERR_NO_ERROR){
376
fprintf_plus(stderr, "Mandos plugin mandos-client: "
377
"bad gpgme_data_new: %s: %s\n",
378
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
379
293
gpgme_data_release(dh_crypto);
380
294
return -1;
381
295
}
382
296
383
297
/* Decrypt data from the cryptotext data buffer to the plaintext
384
298
data buffer */
385
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
386
300
if(rc != GPG_ERR_NO_ERROR){
387
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
388
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
389
303
plaintext_length = -1;
390
304
if(debug){
391
305
gpgme_decrypt_result_t result;
392
result = gpgme_op_decrypt_result(mc->ctx);
306
result = gpgme_op_decrypt_result(mc.ctx);
393
307
if(result == NULL){
394
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
395
309
} else {
396
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
397
result->unsupported_algorithm);
398
fprintf_plus(stderr, "Wrong key usage: %u\n",
399
result->wrong_key_usage);
310
fprintf(stderr, "Unsupported algorithm: %s\n",
311
result->unsupported_algorithm);
312
fprintf(stderr, "Wrong key usage: %u\n",
313
result->wrong_key_usage);
400
314
if(result->file_name != NULL){
401
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
402
316
}
403
317
gpgme_recipient_t recipient;
404
318
recipient = result->recipients;
405
319
while(recipient != NULL){
406
fprintf_plus(stderr, "Public key algorithm: %s\n",
407
gpgme_pubkey_algo_name
408
(recipient->pubkey_algo));
409
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
410
fprintf_plus(stderr, "Secret key available: %s\n",
411
recipient->status == GPG_ERR_NO_SECKEY
412
? "No" : "Yes");
320
fprintf(stderr, "Public key algorithm: %s\n",
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
324
recipient->status == GPG_ERR_NO_SECKEY
325
? "No" : "Yes");
413
326
recipient = recipient->next;
414
327
}
415
328
}
418
331
}
419
332
420
333
if(debug){
421
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
422
335
}
423
336
424
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
425
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
426
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
427
340
plaintext_length = -1;
428
341
goto decrypt_end;
429
342
}
431
344
*plaintext = NULL;
432
345
while(true){
433
346
plaintext_capacity = incbuffer(plaintext,
434
(size_t)plaintext_length,
435
plaintext_capacity);
347
(size_t)plaintext_length,
348
plaintext_capacity);
436
349
if(plaintext_capacity == 0){
437
perror_plus("incbuffer");
438
plaintext_length = -1;
439
goto decrypt_end;
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
440
353
}
441
354
442
355
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
447
360
break;
448
361
}
449
362
if(ret < 0){
450
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
451
364
plaintext_length = -1;
452
365
goto decrypt_end;
453
366
}
455
368
}
456
369
457
370
if(debug){
458
fprintf_plus(stderr, "Decrypted password is: ");
371
fprintf(stderr, "Decrypted password is: ");
459
372
for(ssize_t i = 0; i < plaintext_length; i++){
460
373
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
461
374
}
473
386
}
474
387
475
388
static const char * safer_gnutls_strerror(int value){
476
const char *ret = gnutls_strerror(value);
389
const char *ret = gnutls_strerror(value); /* Spurious warning from
390
-Wunreachable-code */
477
391
if(ret == NULL)
478
392
ret = "(unknown)";
479
393
return ret;
482
396
/* GnuTLS log function callback */
483
397
static void debuggnutls(__attribute__((unused)) int level,
484
398
const char* string){
485
fprintf_plus(stderr, "GnuTLS: %s", string);
399
fprintf(stderr, "GnuTLS: %s", string);
486
400
}
487
401
488
402
static int init_gnutls_global(const char *pubkeyfilename,
489
const char *seckeyfilename,
490
mandos_context *mc){
403
const char *seckeyfilename){
491
404
int ret;
492
405
493
406
if(debug){
494
fprintf_plus(stderr, "Initializing GnuTLS\n");
407
fprintf(stderr, "Initializing GnuTLS\n");
495
408
}
496
409
497
410
ret = gnutls_global_init();
498
411
if(ret != GNUTLS_E_SUCCESS){
499
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
500
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
501
414
return -1;
502
415
}
503
416
510
423
}
511
424
512
425
/* OpenPGP credentials */
513
ret = gnutls_certificate_allocate_credentials(&mc->cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
514
427
if(ret != GNUTLS_E_SUCCESS){
515
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
516
safer_gnutls_strerror(ret));
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
432
safer_gnutls_strerror(ret));
517
433
gnutls_global_deinit();
518
434
return -1;
519
435
}
520
436
521
437
if(debug){
522
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
523
" secret key %s as GnuTLS credentials\n",
524
pubkeyfilename,
525
seckeyfilename);
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
440
seckeyfilename);
526
441
}
527
442
528
443
ret = gnutls_certificate_set_openpgp_key_file
529
(mc->cred, pubkeyfilename, seckeyfilename,
444
(mc.cred, pubkeyfilename, seckeyfilename,
530
445
GNUTLS_OPENPGP_FMT_BASE64);
531
446
if(ret != GNUTLS_E_SUCCESS){
532
fprintf_plus(stderr,
533
"Error[%d] while reading the OpenPGP key pair ('%s',"
534
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
535
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
536
safer_gnutls_strerror(ret));
447
fprintf(stderr,
448
"Error[%d] while reading the OpenPGP key pair ('%s',"
449
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
450
fprintf(stderr, "The GnuTLS error is: %s\n",
451
safer_gnutls_strerror(ret));
537
452
goto globalfail;
538
453
}
539
454
540
455
/* GnuTLS server initialization */
541
ret = gnutls_dh_params_init(&mc->dh_params);
456
ret = gnutls_dh_params_init(&mc.dh_params);
542
457
if(ret != GNUTLS_E_SUCCESS){
543
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
544
" initialization: %s\n",
545
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
546
460
goto globalfail;
547
461
}
548
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
549
463
if(ret != GNUTLS_E_SUCCESS){
550
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
551
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
552
466
goto globalfail;
553
467
}
554
468
555
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
469
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
556
470
557
471
return 0;
558
472
559
473
globalfail:
560
474
561
gnutls_certificate_free_credentials(mc->cred);
475
gnutls_certificate_free_credentials(mc.cred);
562
476
gnutls_global_deinit();
563
gnutls_dh_params_deinit(mc->dh_params);
477
gnutls_dh_params_deinit(mc.dh_params);
564
478
return -1;
565
479
}
566
480
567
static int init_gnutls_session(gnutls_session_t *session,
568
mandos_context *mc){
481
static int init_gnutls_session(gnutls_session_t *session){
569
482
int ret;
570
483
/* GnuTLS session creation */
571
484
do {
575
488
}
576
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
577
490
if(ret != GNUTLS_E_SUCCESS){
578
fprintf_plus(stderr,
579
"Error in GnuTLS session initialization: %s\n",
580
safer_gnutls_strerror(ret));
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
safer_gnutls_strerror(ret));
581
493
}
582
494
583
495
{
584
496
const char *err;
585
497
do {
586
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
587
499
if(quit_now){
588
500
gnutls_deinit(*session);
589
501
return -1;
590
502
}
591
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
592
504
if(ret != GNUTLS_E_SUCCESS){
593
fprintf_plus(stderr, "Syntax error at: %s\n", err);
594
fprintf_plus(stderr, "GnuTLS error: %s\n",
595
safer_gnutls_strerror(ret));
505
fprintf(stderr, "Syntax error at: %s\n", err);
506
fprintf(stderr, "GnuTLS error: %s\n",
507
safer_gnutls_strerror(ret));
596
508
gnutls_deinit(*session);
597
509
return -1;
598
510
}
600
512
601
513
do {
602
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
603
mc->cred);
515
mc.cred);
604
516
if(quit_now){
605
517
gnutls_deinit(*session);
606
518
return -1;
607
519
}
608
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
609
521
if(ret != GNUTLS_E_SUCCESS){
610
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
611
safer_gnutls_strerror(ret));
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
safer_gnutls_strerror(ret));
612
524
gnutls_deinit(*session);
613
525
return -1;
614
526
}
616
528
/* ignore client certificate if any. */
617
529
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
618
530
619
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
531
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
620
532
621
533
return 0;
622
534
}
626
538
__attribute__((unused)) const char *txt){}
627
539
628
540
/* Called when a Mandos server is found */
629
static int start_mandos_communication(const char *ip, in_port_t port,
541
static int start_mandos_communication(const char *ip, uint16_t port,
630
542
AvahiIfIndex if_index,
631
int af, mandos_context *mc){
543
int af){
632
544
int ret, tcp_sd = -1;
633
545
ssize_t sret;
634
546
union {
659
571
pf = PF_INET;
660
572
break;
661
573
default:
662
fprintf_plus(stderr, "Bad address family: %d\n", af);
574
fprintf(stderr, "Bad address family: %d\n", af);
663
575
errno = EINVAL;
664
576
return -1;
665
577
}
666
578
667
/* If the interface is specified and we have a list of interfaces */
668
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
669
/* Check if the interface is one of the interfaces we are using */
670
bool match = false;
671
{
672
char *interface = NULL;
673
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
674
interface))){
675
if(if_nametoindex(interface) == (unsigned int)if_index){
676
match = true;
677
break;
678
}
679
}
680
}
681
if(not match){
682
/* This interface does not match any in the list, so we don't
683
connect to the server */
684
if(debug){
685
char interface[IF_NAMESIZE];
686
if(if_indextoname((unsigned int)if_index, interface) == NULL){
687
perror_plus("if_indextoname");
688
} else {
689
fprintf_plus(stderr, "Skipping server on non-used interface"
690
" \"%s\"\n",
691
if_indextoname((unsigned int)if_index,
692
interface));
693
}
694
}
695
return -1;
696
}
697
}
698
699
ret = init_gnutls_session(&session, mc);
579
ret = init_gnutls_session(&session);
700
580
if(ret != 0){
701
581
return -1;
702
582
}
703
583
704
584
if(debug){
705
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
706
PRIuMAX "\n", ip, (uintmax_t)port);
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
586
"\n", ip, port);
707
587
}
708
588
709
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
710
590
if(tcp_sd < 0){
711
591
int e = errno;
712
perror_plus("socket");
592
perror("socket");
713
593
errno = e;
714
594
goto mandos_end;
715
595
}
729
609
}
730
610
if(ret < 0 ){
731
611
int e = errno;
732
perror_plus("inet_pton");
612
perror("inet_pton");
733
613
errno = e;
734
614
goto mandos_end;
735
615
}
736
616
if(ret == 0){
737
617
int e = errno;
738
fprintf_plus(stderr, "Bad address: %s\n", ip);
618
fprintf(stderr, "Bad address: %s\n", ip);
739
619
errno = e;
740
620
goto mandos_end;
741
621
}
742
622
if(af == AF_INET6){
743
to.in6.sin6_port = htons(port);
744
#ifdef __GNUC__
745
#pragma GCC diagnostic push
746
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
747
#endif
623
to.in6.sin6_port = htons(port); /* Spurious warnings from
624
-Wconversion and
625
-Wunreachable-code */
626
748
627
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
749
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower */
750
#ifdef __GNUC__
751
#pragma GCC diagnostic pop
752
#endif
628
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
629
-Wunreachable-code*/
753
630
if(if_index == AVAHI_IF_UNSPEC){
754
fprintf_plus(stderr, "An IPv6 link-local address is"
755
" incomplete without a network interface\n");
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
" without a network interface\n");
756
633
errno = EINVAL;
757
634
goto mandos_end;
758
635
}
760
637
to.in6.sin6_scope_id = (uint32_t)if_index;
761
638
}
762
639
} else {
763
to.in.sin_port = htons(port);
640
to.in.sin_port = htons(port); /* Spurious warnings from
641
-Wconversion and
642
-Wunreachable-code */
764
643
}
765
644
766
645
if(quit_now){
772
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
773
652
char interface[IF_NAMESIZE];
774
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
775
perror_plus("if_indextoname");
654
perror("if_indextoname");
776
655
} else {
777
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
778
"\n", ip, interface, (uintmax_t)port);
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
779
658
}
780
659
} else {
781
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
782
ip, (uintmax_t)port);
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
783
662
}
784
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
785
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
792
671
sizeof(addrstr));
793
672
}
794
673
if(pcret == NULL){
795
perror_plus("inet_ntop");
674
perror("inet_ntop");
796
675
} else {
797
676
if(strcmp(addrstr, ip) != 0){
798
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
799
678
}
800
679
}
801
680
}
813
692
if(ret < 0){
814
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
815
694
int e = errno;
816
perror_plus("connect");
695
perror("connect");
817
696
errno = e;
818
697
}
819
698
goto mandos_end;
829
708
while(true){
830
709
size_t out_size = strlen(out);
831
710
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
832
out_size - written));
711
out_size - written));
833
712
if(ret == -1){
834
713
int e = errno;
835
perror_plus("write");
714
perror("write");
836
715
errno = e;
837
716
goto mandos_end;
838
717
}
855
734
}
856
735
857
736
if(debug){
858
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
737
fprintf(stderr, "Establishing TLS session with %s\n", ip);
859
738
}
860
739
861
740
if(quit_now){
863
742
goto mandos_end;
864
743
}
865
744
866
/* This casting via intptr_t is to eliminate warning about casting
867
an int to a pointer type. This is exactly how the GnuTLS Guile
868
function "set-session-transport-fd!" does it. */
869
gnutls_transport_set_ptr(session,
870
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
871
746
872
747
if(quit_now){
873
748
errno = EINTR;
884
759
885
760
if(ret != GNUTLS_E_SUCCESS){
886
761
if(debug){
887
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
762
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
888
763
gnutls_perror(ret);
889
764
}
890
765
errno = EPROTO;
894
769
/* Read OpenPGP packet that contains the wanted password */
895
770
896
771
if(debug){
897
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
898
" %s\n", ip);
772
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
773
ip);
899
774
}
900
775
901
776
while(true){
906
781
}
907
782
908
783
buffer_capacity = incbuffer(&buffer, buffer_length,
909
buffer_capacity);
784
buffer_capacity);
910
785
if(buffer_capacity == 0){
911
786
int e = errno;
912
perror_plus("incbuffer");
787
perror("incbuffer");
913
788
errno = e;
914
789
goto mandos_end;
915
790
}
939
814
}
940
815
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
941
816
if(ret < 0){
942
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
943
"***\n");
817
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
944
818
gnutls_perror(ret);
945
819
errno = EPROTO;
946
820
goto mandos_end;
947
821
}
948
822
break;
949
823
default:
950
fprintf_plus(stderr, "Unknown error while reading data from"
951
" encrypted session with Mandos server\n");
824
fprintf(stderr, "Unknown error while reading data from"
825
" encrypted session with Mandos server\n");
952
826
gnutls_bye(session, GNUTLS_SHUT_RDWR);
953
827
errno = EIO;
954
828
goto mandos_end;
959
833
}
960
834
961
835
if(debug){
962
fprintf_plus(stderr, "Closing TLS session\n");
836
fprintf(stderr, "Closing TLS session\n");
963
837
}
964
838
965
839
if(quit_now){
977
851
978
852
if(buffer_length > 0){
979
853
ssize_t decrypted_buffer_size;
980
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
981
&decrypted_buffer, mc);
854
decrypted_buffer_size = pgp_packet_decrypt(buffer,
855
buffer_length,
856
&decrypted_buffer);
982
857
if(decrypted_buffer_size >= 0){
983
858
984
859
written = 0;
994
869
if(ret == 0 and ferror(stdout)){
995
870
int e = errno;
996
871
if(debug){
997
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
998
strerror(errno));
872
fprintf(stderr, "Error writing encrypted data: %s\n",
873
strerror(errno));
999
874
}
1000
875
errno = e;
1001
876
goto mandos_end;
1020
895
if(e == 0){
1021
896
e = errno;
1022
897
}
1023
perror_plus("close");
898
perror("close");
1024
899
}
1025
900
gnutls_deinit(session);
1026
errno = e;
1027
901
if(quit_now){
1028
errno = EINTR;
902
e = EINTR;
1029
903
retval = -1;
1030
904
}
905
errno = e;
1031
906
}
1032
907
return retval;
1033
908
}
1045
920
AVAHI_GCC_UNUSED AvahiStringList *txt,
1046
921
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1047
922
flags,
1048
void* mc){
1049
if(r == NULL){
1050
return;
1051
}
923
AVAHI_GCC_UNUSED void* userdata){
924
assert(r);
1052
925
1053
926
/* Called whenever a service has been resolved successfully or
1054
927
timed out */
1060
933
switch(event){
1061
934
default:
1062
935
case AVAHI_RESOLVER_FAILURE:
1063
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1064
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1065
domain,
1066
avahi_strerror(avahi_server_errno
1067
(((mandos_context*)mc)->server)));
936
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
937
" of type '%s' in domain '%s': %s\n", name, type, domain,
938
avahi_strerror(avahi_server_errno(mc.server)));
1068
939
break;
1069
940
1070
941
case AVAHI_RESOLVER_FOUND:
1072
943
char ip[AVAHI_ADDRESS_STR_MAX];
1073
944
avahi_address_snprint(ip, sizeof(ip), address);
1074
945
if(debug){
1075
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1076
PRIdMAX ") on port %" PRIu16 "\n", name,
1077
host_name, ip, (intmax_t)interface, port);
946
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
947
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
948
ip, (intmax_t)interface, port);
1078
949
}
1079
int ret = start_mandos_communication(ip, (in_port_t)port,
1080
interface,
1081
avahi_proto_to_af(proto),
1082
mc);
950
int ret = start_mandos_communication(ip, port, interface,
951
avahi_proto_to_af(proto));
1083
952
if(ret == 0){
1084
avahi_simple_poll_quit(simple_poll);
1085
} else {
1086
if(not add_server(ip, (in_port_t)port, interface,
1087
avahi_proto_to_af(proto),
1088
&((mandos_context*)mc)->current_server)){
1089
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1090
" list\n", name);
1091
}
953
avahi_simple_poll_quit(mc.simple_poll);
1092
954
}
1093
955
}
1094
956
}
1104
966
const char *domain,
1105
967
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1106
968
flags,
1107
void* mc){
1108
if(b == NULL){
1109
return;
1110
}
969
AVAHI_GCC_UNUSED void* userdata){
970
assert(b);
1111
971
1112
972
/* Called whenever a new services becomes available on the LAN or
1113
973
is removed from the LAN */
1120
980
default:
1121
981
case AVAHI_BROWSER_FAILURE:
1122
982
1123
fprintf_plus(stderr, "(Avahi browser) %s\n",
1124
avahi_strerror(avahi_server_errno
1125
(((mandos_context*)mc)->server)));
1126
avahi_simple_poll_quit(simple_poll);
983
fprintf(stderr, "(Avahi browser) %s\n",
984
avahi_strerror(avahi_server_errno(mc.server)));
985
avahi_simple_poll_quit(mc.simple_poll);
1127
986
return;
1128
987
1129
988
case AVAHI_BROWSER_NEW:
1132
991
the callback function is called the Avahi server will free the
1133
992
resolver for us. */
1134
993
1135
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1136
interface, protocol, name, type,
1137
domain, protocol, 0,
1138
resolve_callback, mc) == NULL)
1139
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1140
" %s\n", name,
1141
avahi_strerror(avahi_server_errno
1142
(((mandos_context*)mc)->server)));
994
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
995
name, type, domain, protocol, 0,
996
resolve_callback, NULL) == NULL)
997
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
998
name, avahi_strerror(avahi_server_errno(mc.server)));
1143
999
break;
1144
1000
1145
1001
case AVAHI_BROWSER_REMOVE:
1148
1004
case AVAHI_BROWSER_ALL_FOR_NOW:
1149
1005
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1150
1006
if(debug){
1151
fprintf_plus(stderr, "No Mandos server found, still"
1152
" searching...\n");
1007
fprintf(stderr, "No Mandos server found, still searching...\n");
1153
1008
}
1154
1009
break;
1155
1010
}
1156
1011
}
1157
1012
1158
/* Signal handler that stops main loop after SIGTERM */
1013
/* stop main loop after sigterm has been called */
1159
1014
static void handle_sigterm(int sig){
1160
1015
if(quit_now){
1161
1016
return;
1163
1018
quit_now = 1;
1164
1019
signal_received = sig;
1165
1020
int old_errno = errno;
1166
/* set main loop to exit */
1167
if(simple_poll != NULL){
1168
avahi_simple_poll_quit(simple_poll);
1021
if(mc.simple_poll != NULL){
1022
avahi_simple_poll_quit(mc.simple_poll);
1169
1023
}
1170
1024
errno = old_errno;
1171
1025
}
1172
1026
1173
bool get_flags(const char *ifname, struct ifreq *ifr){
1174
int ret;
1175
error_t ret_errno;
1176
1177
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1178
if(s < 0){
1179
ret_errno = errno;
1180
perror_plus("socket");
1181
errno = ret_errno;
1182
return false;
1183
}
1184
strcpy(ifr->ifr_name, ifname);
1185
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1186
if(ret == -1){
1187
if(debug){
1188
ret_errno = errno;
1189
perror_plus("ioctl SIOCGIFFLAGS");
1190
errno = ret_errno;
1191
}
1192
return false;
1193
}
1194
return true;
1195
}
1196
1197
bool good_flags(const char *ifname, const struct ifreq *ifr){
1198
1199
/* Reject the loopback device */
1200
if(ifr->ifr_flags & IFF_LOOPBACK){
1201
if(debug){
1202
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1203
ifname);
1204
}
1205
return false;
1206
}
1207
/* Accept point-to-point devices only if connect_to is specified */
1208
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1209
if(debug){
1210
fprintf_plus(stderr, "Accepting point-to-point interface"
1211
" \"%s\"\n", ifname);
1212
}
1213
return true;
1214
}
1215
/* Otherwise, reject non-broadcast-capable devices */
1216
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1217
if(debug){
1218
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1219
" \"%s\"\n", ifname);
1220
}
1221
return false;
1222
}
1223
/* Reject non-ARP interfaces (including dummy interfaces) */
1224
if(ifr->ifr_flags & IFF_NOARP){
1225
if(debug){
1226
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1227
ifname);
1228
}
1229
return false;
1230
}
1231
1232
/* Accept this device */
1233
if(debug){
1234
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1235
}
1236
return true;
1237
}
1238
1239
1027
/*
1240
1028
* This function determines if a directory entry in /sys/class/net
1241
1029
* corresponds to an acceptable network device.
1242
1030
* (This function is passed to scandir(3) as a filter function.)
1243
1031
*/
1244
1032
int good_interface(const struct dirent *if_entry){
1033
ssize_t ssret;
1034
char *flagname = NULL;
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1036
if_entry->d_name);
1037
if(ret < 0){
1038
perror("asprintf");
1039
return 0;
1040
}
1245
1041
if(if_entry->d_name[0] == '.'){
1246
1042
return 0;
1247
1043
}
1248
1249
struct ifreq ifr;
1250
if(not get_flags(if_entry->d_name, &ifr)){
1251
if(debug){
1252
fprintf_plus(stderr, "Failed to get flags for interface "
1253
"\"%s\"\n", if_entry->d_name);
1254
}
1255
return 0;
1256
}
1257
1258
if(not good_flags(if_entry->d_name, &ifr)){
1259
return 0;
1260
}
1261
return 1;
1262
}
1263
1264
/*
1265
* This function determines if a network interface is up.
1266
*/
1267
bool interface_is_up(const char *interface){
1268
struct ifreq ifr;
1269
if(not get_flags(interface, &ifr)){
1270
if(debug){
1271
fprintf_plus(stderr, "Failed to get flags for interface "
1272
"\"%s\"\n", interface);
1273
}
1274
return false;
1275
}
1276
1277
return (bool)(ifr.ifr_flags & IFF_UP);
1278
}
1279
1280
/*
1281
* This function determines if a network interface is running
1282
*/
1283
bool interface_is_running(const char *interface){
1284
struct ifreq ifr;
1285
if(not get_flags(interface, &ifr)){
1286
if(debug){
1287
fprintf_plus(stderr, "Failed to get flags for interface "
1288
"\"%s\"\n", interface);
1289
}
1290
return false;
1291
}
1292
1293
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1294
}
1295
1296
int notdotentries(const struct dirent *direntry){
1297
/* Skip "." and ".." */
1298
if(direntry->d_name[0] == '.'
1299
and (direntry->d_name[1] == '\0'
1300
or (direntry->d_name[1] == '.'
1301
and direntry->d_name[2] == '\0'))){
1302
return 0;
1303
}
1304
return 1;
1305
}
1306
1307
/* Is this directory entry a runnable program? */
1308
int runnable_hook(const struct dirent *direntry){
1309
int ret;
1310
size_t sret;
1311
struct stat st;
1312
1313
if((direntry->d_name)[0] == '\0'){
1314
/* Empty name? */
1315
return 0;
1316
}
1317
1318
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1319
"abcdefghijklmnopqrstuvwxyz"
1320
"0123456789"
1321
"_-");
1322
if((direntry->d_name)[sret] != '\0'){
1323
/* Contains non-allowed characters */
1324
if(debug){
1325
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1326
direntry->d_name);
1327
}
1328
return 0;
1329
}
1330
1331
char *fullname = NULL;
1332
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1333
if(ret < 0){
1334
perror_plus("asprintf");
1335
return 0;
1336
}
1337
1338
ret = stat(fullname, &st);
1339
if(ret == -1){
1340
if(debug){
1341
perror_plus("Could not stat hook");
1342
}
1343
return 0;
1344
}
1345
if(not (S_ISREG(st.st_mode))){
1346
/* Not a regular file */
1347
if(debug){
1348
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1349
direntry->d_name);
1350
}
1351
return 0;
1352
}
1353
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1354
/* Not executable */
1355
if(debug){
1356
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1357
direntry->d_name);
1358
}
1359
return 0;
1360
}
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
if(flags_fd == -1){
1046
perror("open");
1047
return 0;
1048
}
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1055
perror("malloc");
1056
close(flags_fd);
1057
return 0;
1058
}
1059
while(to_read > 0){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1061
(size_t)to_read));
1062
if(ssret == -1){
1063
perror("read");
1064
free(flagstring);
1065
close(flags_fd);
1066
return 0;
1067
}
1068
to_read -= ssret;
1069
if(ssret == 0){
1070
break;
1071
}
1072
}
1073
close(flags_fd);
1074
intmax_t tmpmax;
1075
char *tmp;
1076
errno = 0;
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
1081
if(debug){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1084
}
1085
free(flagstring);
1086
return 0;
1087
}
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1090
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1092
if(debug){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1095
}
1096
return 0;
1097
}
1098
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1100
if(debug){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1103
}
1104
return 1;
1105
}
1106
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1108
if(debug){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
1114
/* Accept this device */
1361
1115
if(debug){
1362
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1363
direntry->d_name);
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1364
1118
}
1365
1119
return 1;
1366
1120
}
1367
1121
1368
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1369
mandos_context *mc){
1370
int ret;
1371
struct timespec now;
1372
struct timespec waited_time;
1373
intmax_t block_time;
1374
1375
while(true){
1376
if(mc->current_server == NULL){
1377
if (debug){
1378
fprintf_plus(stderr, "Wait until first server is found."
1379
" No timeout!\n");
1380
}
1381
ret = avahi_simple_poll_iterate(s, -1);
1382
} else {
1383
if (debug){
1384
fprintf_plus(stderr, "Check current_server if we should run"
1385
" it, or wait\n");
1386
}
1387
/* the current time */
1388
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1389
if(ret == -1){
1390
perror_plus("clock_gettime");
1391
return -1;
1392
}
1393
/* Calculating in ms how long time between now and server
1394
who we visted longest time ago. Now - last seen. */
1395
waited_time.tv_sec = (now.tv_sec
1396
- mc->current_server->last_seen.tv_sec);
1397
waited_time.tv_nsec = (now.tv_nsec
1398
- mc->current_server->last_seen.tv_nsec);
1399
/* total time is 10s/10,000ms.
1400
Converting to s from ms by dividing by 1,000,
1401
and ns to ms by dividing by 1,000,000. */
1402
block_time = ((retry_interval
1403
- ((intmax_t)waited_time.tv_sec * 1000))
1404
- ((intmax_t)waited_time.tv_nsec / 1000000));
1405
1406
if (debug){
1407
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1408
block_time);
1409
}
1410
1411
if(block_time <= 0){
1412
ret = start_mandos_communication(mc->current_server->ip,
1413
mc->current_server->port,
1414
mc->current_server->if_index,
1415
mc->current_server->af, mc);
1416
if(ret == 0){
1417
avahi_simple_poll_quit(s);
1418
return 0;
1419
}
1420
ret = clock_gettime(CLOCK_MONOTONIC,
1421
&mc->current_server->last_seen);
1422
if(ret == -1){
1423
perror_plus("clock_gettime");
1424
return -1;
1425
}
1426
mc->current_server = mc->current_server->next;
1427
block_time = 0; /* Call avahi to find new Mandos
1428
servers, but don't block */
1429
}
1430
1431
ret = avahi_simple_poll_iterate(s, (int)block_time);
1432
}
1433
if(ret != 0){
1434
if (ret > 0 or errno != EINTR){
1435
return (ret != 1) ? ret : 0;
1436
}
1437
}
1438
}
1439
}
1440
1441
/* Set effective uid to 0, return errno */
1442
error_t raise_privileges(void){
1443
error_t old_errno = errno;
1444
error_t ret_errno = 0;
1445
if(seteuid(0) == -1){
1446
ret_errno = errno;
1447
perror_plus("seteuid");
1448
}
1449
errno = old_errno;
1450
return ret_errno;
1451
}
1452
1453
/* Set effective and real user ID to 0. Return errno. */
1454
error_t raise_privileges_permanently(void){
1455
error_t old_errno = errno;
1456
error_t ret_errno = raise_privileges();
1457
if(ret_errno != 0){
1458
errno = old_errno;
1459
return ret_errno;
1460
}
1461
if(setuid(0) == -1){
1462
ret_errno = errno;
1463
perror_plus("seteuid");
1464
}
1465
errno = old_errno;
1466
return ret_errno;
1467
}
1468
1469
/* Set effective user ID to unprivileged saved user ID */
1470
error_t lower_privileges(void){
1471
error_t old_errno = errno;
1472
error_t ret_errno = 0;
1473
if(seteuid(uid) == -1){
1474
ret_errno = errno;
1475
perror_plus("seteuid");
1476
}
1477
errno = old_errno;
1478
return ret_errno;
1479
}
1480
1481
/* Lower privileges permanently */
1482
error_t lower_privileges_permanently(void){
1483
error_t old_errno = errno;
1484
error_t ret_errno = 0;
1485
if(setuid(uid) == -1){
1486
ret_errno = errno;
1487
perror_plus("setuid");
1488
}
1489
errno = old_errno;
1490
return ret_errno;
1491
}
1492
1493
bool run_network_hooks(const char *mode, const char *interface,
1494
const float delay){
1495
struct dirent **direntries;
1496
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1497
alphasort);
1498
if(numhooks == -1){
1499
if(errno == ENOENT){
1500
if(debug){
1501
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1502
" found\n", hookdir);
1503
}
1504
} else {
1505
perror_plus("scandir");
1506
}
1507
} else {
1508
struct dirent *direntry;
1509
int ret;
1510
int devnull = open("/dev/null", O_RDONLY);
1511
for(int i = 0; i < numhooks; i++){
1512
direntry = direntries[i];
1513
char *fullname = NULL;
1514
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1515
if(ret < 0){
1516
perror_plus("asprintf");
1517
continue;
1518
}
1519
if(debug){
1520
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1521
direntry->d_name);
1522
}
1523
pid_t hook_pid = fork();
1524
if(hook_pid == 0){
1525
/* Child */
1526
/* Raise privileges */
1527
raise_privileges_permanently();
1528
/* Set group */
1529
errno = 0;
1530
ret = setgid(0);
1531
if(ret == -1){
1532
perror_plus("setgid");
1533
}
1534
/* Reset supplementary groups */
1535
errno = 0;
1536
ret = setgroups(0, NULL);
1537
if(ret == -1){
1538
perror_plus("setgroups");
1539
}
1540
dup2(devnull, STDIN_FILENO);
1541
close(devnull);
1542
dup2(STDERR_FILENO, STDOUT_FILENO);
1543
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1544
if(ret == -1){
1545
perror_plus("setenv");
1546
_exit(EX_OSERR);
1547
}
1548
ret = setenv("DEVICE", interface, 1);
1549
if(ret == -1){
1550
perror_plus("setenv");
1551
_exit(EX_OSERR);
1552
}
1553
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1554
if(ret == -1){
1555
perror_plus("setenv");
1556
_exit(EX_OSERR);
1557
}
1558
ret = setenv("MODE", mode, 1);
1559
if(ret == -1){
1560
perror_plus("setenv");
1561
_exit(EX_OSERR);
1562
}
1563
char *delaystring;
1564
ret = asprintf(&delaystring, "%f", delay);
1565
if(ret == -1){
1566
perror_plus("asprintf");
1567
_exit(EX_OSERR);
1568
}
1569
ret = setenv("DELAY", delaystring, 1);
1570
if(ret == -1){
1571
free(delaystring);
1572
perror_plus("setenv");
1573
_exit(EX_OSERR);
1574
}
1575
free(delaystring);
1576
if(connect_to != NULL){
1577
ret = setenv("CONNECT", connect_to, 1);
1578
if(ret == -1){
1579
perror_plus("setenv");
1580
_exit(EX_OSERR);
1581
}
1582
}
1583
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1584
perror_plus("execl");
1585
_exit(EXIT_FAILURE);
1586
}
1587
} else {
1588
int status;
1589
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1590
perror_plus("waitpid");
1591
free(fullname);
1592
continue;
1593
}
1594
if(WIFEXITED(status)){
1595
if(WEXITSTATUS(status) != 0){
1596
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1597
" with status %d\n", direntry->d_name,
1598
WEXITSTATUS(status));
1599
free(fullname);
1600
continue;
1601
}
1602
} else if(WIFSIGNALED(status)){
1603
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1604
" signal %d\n", direntry->d_name,
1605
WTERMSIG(status));
1606
free(fullname);
1607
continue;
1608
} else {
1609
fprintf_plus(stderr, "Warning: network hook \"%s\""
1610
" crashed\n", direntry->d_name);
1611
free(fullname);
1612
continue;
1613
}
1614
}
1615
free(fullname);
1616
if(debug){
1617
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1618
direntry->d_name);
1619
}
1620
}
1621
close(devnull);
1622
}
1623
return true;
1624
}
1625
1626
error_t bring_up_interface(const char *const interface,
1627
const float delay){
1628
int sd = -1;
1629
error_t old_errno = errno;
1630
error_t ret_errno = 0;
1631
int ret, ret_setflags;
1632
struct ifreq network;
1633
unsigned int if_index = if_nametoindex(interface);
1634
if(if_index == 0){
1635
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1636
errno = old_errno;
1637
return ENXIO;
1638
}
1639
1640
if(quit_now){
1641
errno = old_errno;
1642
return EINTR;
1643
}
1644
1645
if(not interface_is_up(interface)){
1646
if(not get_flags(interface, &network) and debug){
1647
ret_errno = errno;
1648
fprintf_plus(stderr, "Failed to get flags for interface "
1649
"\"%s\"\n", interface);
1650
return ret_errno;
1651
}
1652
network.ifr_flags |= IFF_UP;
1653
1654
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1655
if(sd < 0){
1656
ret_errno = errno;
1657
perror_plus("socket");
1658
errno = old_errno;
1659
return ret_errno;
1660
}
1661
1662
if(quit_now){
1663
close(sd);
1664
errno = old_errno;
1665
return EINTR;
1666
}
1667
1668
if(debug){
1669
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1670
interface);
1671
}
1672
1673
/* Raise priviliges */
1674
raise_privileges();
1675
1676
#ifdef __linux__
1677
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1678
messages about the network interface to mess up the prompt */
1679
int ret_linux = klogctl(8, NULL, 5);
1680
bool restore_loglevel = true;
1681
if(ret_linux == -1){
1682
restore_loglevel = false;
1683
perror_plus("klogctl");
1684
}
1685
#endif /* __linux__ */
1686
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1687
ret_errno = errno;
1688
#ifdef __linux__
1689
if(restore_loglevel){
1690
ret_linux = klogctl(7, NULL, 0);
1691
if(ret_linux == -1){
1692
perror_plus("klogctl");
1693
}
1694
}
1695
#endif /* __linux__ */
1696
1697
/* Lower privileges */
1698
lower_privileges();
1699
1700
/* Close the socket */
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1702
if(ret == -1){
1703
perror_plus("close");
1704
}
1705
1706
if(ret_setflags == -1){
1707
errno = ret_errno;
1708
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1709
errno = old_errno;
1710
return ret_errno;
1711
}
1712
} else if(debug){
1713
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1714
interface);
1715
}
1716
1717
/* Sleep checking until interface is running.
1718
Check every 0.25s, up to total time of delay */
1719
for(int i=0; i < delay * 4; i++){
1720
if(interface_is_running(interface)){
1721
break;
1722
}
1723
struct timespec sleeptime = { .tv_nsec = 250000000 };
1724
ret = nanosleep(&sleeptime, NULL);
1725
if(ret == -1 and errno != EINTR){
1726
perror_plus("nanosleep");
1727
}
1728
}
1729
1730
errno = old_errno;
1731
return 0;
1732
}
1733
1734
error_t take_down_interface(const char *const interface){
1735
error_t old_errno = errno;
1736
struct ifreq network;
1737
unsigned int if_index = if_nametoindex(interface);
1738
if(if_index == 0){
1739
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1740
errno = old_errno;
1741
return ENXIO;
1742
}
1743
if(interface_is_up(interface)){
1744
error_t ret_errno = 0;
1745
if(not get_flags(interface, &network) and debug){
1746
ret_errno = errno;
1747
fprintf_plus(stderr, "Failed to get flags for interface "
1748
"\"%s\"\n", interface);
1749
return ret_errno;
1750
}
1751
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1752
1753
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1754
if(sd < 0){
1755
ret_errno = errno;
1756
perror_plus("socket");
1757
errno = old_errno;
1758
return ret_errno;
1759
}
1760
1761
if(debug){
1762
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1763
interface);
1764
}
1765
1766
/* Raise priviliges */
1767
raise_privileges();
1768
1769
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1770
ret_errno = errno;
1771
1772
/* Lower privileges */
1773
lower_privileges();
1774
1775
/* Close the socket */
1776
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1777
if(ret == -1){
1778
perror_plus("close");
1779
}
1780
1781
if(ret_setflags == -1){
1782
errno = ret_errno;
1783
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1784
errno = old_errno;
1785
return ret_errno;
1786
}
1787
} else if(debug){
1788
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1789
interface);
1790
}
1791
1792
errno = old_errno;
1793
return 0;
1794
}
1795
1796
1122
int main(int argc, char *argv[]){
1797
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1798
.priority = "SECURE256:!CTYPE-X.509:"
1799
"+CTYPE-OPENPGP", .current_server = NULL,
1800
.interfaces = NULL, .interfaces_size = 0 };
1801
1123
AvahiSServiceBrowser *sb = NULL;
1802
error_t ret_errno;
1124
int error;
1803
1125
int ret;
1804
1126
intmax_t tmpmax;
1805
1127
char *tmp;
1806
1128
int exitcode = EXIT_SUCCESS;
1807
char *interfaces_to_take_down = NULL;
1808
size_t interfaces_to_take_down_size = 0;
1129
const char *interface = "";
1130
struct ifreq network;
1131
int sd = -1;
1132
bool take_down_interface = false;
1133
uid_t uid;
1134
gid_t gid;
1809
1135
char tempdir[] = "/tmp/mandosXXXXXX";
1810
1136
bool tempdir_created = false;
1811
1137
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1812
1138
const char *seckey = PATHDIR "/" SECKEY;
1813
1139
const char *pubkey = PATHDIR "/" PUBKEY;
1814
char *interfaces_hooks = NULL;
1815
1140
1816
1141
bool gnutls_initialized = false;
1817
1142
bool gpgme_initialized = false;
1818
1143
float delay = 2.5f;
1819
double retry_interval = 10; /* 10s between trying a server and
1820
retrying the same server again */
1821
1144
1822
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1823
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1829
1152
errno = 0;
1830
1153
ret = setgid(gid);
1831
1154
if(ret == -1){
1832
perror_plus("setgid");
1155
perror("setgid");
1833
1156
}
1834
1157
1835
1158
/* Lower user privileges (temporarily) */
1836
1159
errno = 0;
1837
1160
ret = seteuid(uid);
1838
1161
if(ret == -1){
1839
perror_plus("seteuid");
1162
perror("seteuid");
1840
1163
}
1841
1164
1842
1165
if(quit_now){
1877
1200
.arg = "SECONDS",
1878
1201
.doc = "Maximum delay to wait for interface startup",
1879
1202
.group = 2 },
1880
{ .name = "retry", .key = 132,
1881
.arg = "SECONDS",
1882
.doc = "Retry interval used when denied by the Mandos server",
1883
.group = 2 },
1884
{ .name = "network-hook-dir", .key = 133,
1885
.arg = "DIR",
1886
.doc = "Directory where network hooks are located",
1887
.group = 2 },
1888
1203
/*
1889
1204
* These reproduce what we would get without ARGP_NO_HELP
1890
1205
*/
1908
1223
connect_to = arg;
1909
1224
break;
1910
1225
case 'i': /* --interface */
1911
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1912
arg, (int)',');
1913
if(ret_errno != 0){
1914
argp_error(state, "%s", strerror(ret_errno));
1915
}
1226
interface = arg;
1916
1227
break;
1917
1228
case 's': /* --seckey */
1918
1229
seckey = arg;
1938
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1939
1250
argp_error(state, "Bad delay");
1940
1251
}
1941
case 132: /* --retry */
1942
errno = 0;
1943
retry_interval = strtod(arg, &tmp);
1944
if(errno != 0 or tmp == arg or *tmp != '\0'
1945
or (retry_interval * 1000) > INT_MAX
1946
or retry_interval < 0){
1947
argp_error(state, "Bad retry interval");
1948
}
1949
break;
1950
case 133: /* --network-hook-dir */
1951
hookdir = arg;
1952
1252
break;
1953
1253
/*
1954
1254
* These reproduce what we would get without ARGP_NO_HELP
1961
1261
argp_state_help(state, state->out_stream,
1962
1262
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1963
1263
case 'V': /* --version */
1964
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1965
1265
exit(argp_err_exit_status);
1966
1266
break;
1967
1267
default:
1982
1282
case ENOMEM:
1983
1283
default:
1984
1284
errno = ret;
1985
perror_plus("argp_parse");
1285
perror("argp_parse");
1986
1286
exitcode = EX_OSERR;
1987
1287
goto end;
1988
1288
case EINVAL:
1990
1290
goto end;
1991
1291
}
1992
1292
}
1993
1994
{
1995
/* Work around Debian bug #633582:
1996
<http://bugs.debian.org/633582> */
1997
1998
/* Re-raise priviliges */
1999
if(raise_privileges() == 0){
2000
struct stat st;
2001
2002
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2003
int seckey_fd = open(seckey, O_RDONLY);
2004
if(seckey_fd == -1){
2005
perror_plus("open");
2006
} else {
2007
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2008
if(ret == -1){
2009
perror_plus("fstat");
2010
} else {
2011
if(S_ISREG(st.st_mode)
2012
and st.st_uid == 0 and st.st_gid == 0){
2013
ret = fchown(seckey_fd, uid, gid);
2014
if(ret == -1){
2015
perror_plus("fchown");
2016
}
2017
}
2018
}
2019
TEMP_FAILURE_RETRY(close(seckey_fd));
2020
}
2021
}
2022
2023
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2024
int pubkey_fd = open(pubkey, O_RDONLY);
2025
if(pubkey_fd == -1){
2026
perror_plus("open");
2027
} else {
2028
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2029
if(ret == -1){
2030
perror_plus("fstat");
2031
} else {
2032
if(S_ISREG(st.st_mode)
2033
and st.st_uid == 0 and st.st_gid == 0){
2034
ret = fchown(pubkey_fd, uid, gid);
2035
if(ret == -1){
2036
perror_plus("fchown");
2037
}
2038
}
2039
}
2040
TEMP_FAILURE_RETRY(close(pubkey_fd));
2041
}
2042
}
2043
2044
/* Lower privileges */
2045
lower_privileges();
2046
}
2047
}
2048
2049
/* Remove invalid interface names (except "none") */
2050
{
2051
char *interface = NULL;
2052
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2053
interface))){
2054
if(strcmp(interface, "none") != 0
2055
and if_nametoindex(interface) == 0){
2056
if(interface[0] != '\0'){
2057
fprintf_plus(stderr, "Not using nonexisting interface"
2058
" \"%s\"\n", interface);
2059
}
2060
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2061
interface = NULL;
2062
}
2063
}
2064
}
2065
2066
/* Run network hooks */
2067
{
2068
if(mc.interfaces != NULL){
2069
interfaces_hooks = malloc(mc.interfaces_size);
2070
if(interfaces_hooks == NULL){
2071
perror_plus("malloc");
2072
goto end;
2073
}
2074
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2075
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2076
}
2077
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2078
interfaces_hooks : "", delay)){
2079
goto end;
2080
}
2081
}
2082
1293
2083
1294
if(not debug){
2084
1295
avahi_set_log_function(empty_log);
2085
1296
}
1297
1298
if(interface[0] == '\0'){
1299
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1301
alphasort);
1302
if(ret >= 1){
1303
/* Pick the first good interface */
1304
interface = strdup(direntries[0]->d_name);
1305
if(debug){
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1307
}
1308
if(interface == NULL){
1309
perror("malloc");
1310
free(direntries);
1311
exitcode = EXIT_FAILURE;
1312
goto end;
1313
}
1314
free(direntries);
1315
} else {
1316
free(direntries);
1317
fprintf(stderr, "Could not find a network interface\n");
1318
exitcode = EXIT_FAILURE;
1319
goto end;
1320
}
1321
}
2086
1322
2087
1323
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2088
1324
from the signal handler */
2089
1325
/* Initialize the pseudo-RNG for Avahi */
2090
1326
srand((unsigned int) time(NULL));
2091
simple_poll = avahi_simple_poll_new();
2092
if(simple_poll == NULL){
2093
fprintf_plus(stderr,
2094
"Avahi: Failed to create simple poll object.\n");
1327
mc.simple_poll = avahi_simple_poll_new();
1328
if(mc.simple_poll == NULL){
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2095
1330
exitcode = EX_UNAVAILABLE;
2096
1331
goto end;
2097
1332
}
2099
1334
sigemptyset(&sigterm_action.sa_mask);
2100
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2101
1336
if(ret == -1){
2102
perror_plus("sigaddset");
1337
perror("sigaddset");
2103
1338
exitcode = EX_OSERR;
2104
1339
goto end;
2105
1340
}
2106
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2107
1342
if(ret == -1){
2108
perror_plus("sigaddset");
1343
perror("sigaddset");
2109
1344
exitcode = EX_OSERR;
2110
1345
goto end;
2111
1346
}
2112
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2113
1348
if(ret == -1){
2114
perror_plus("sigaddset");
1349
perror("sigaddset");
2115
1350
exitcode = EX_OSERR;
2116
1351
goto end;
2117
1352
}
2121
1356
*/
2122
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2123
1358
if(ret == -1){
2124
perror_plus("sigaction");
1359
perror("sigaction");
2125
1360
return EX_OSERR;
2126
1361
}
2127
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
2128
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
2129
1364
if(ret == -1){
2130
perror_plus("sigaction");
1365
perror("sigaction");
2131
1366
exitcode = EX_OSERR;
2132
1367
goto end;
2133
1368
}
2134
1369
}
2135
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2136
1371
if(ret == -1){
2137
perror_plus("sigaction");
1372
perror("sigaction");
2138
1373
return EX_OSERR;
2139
1374
}
2140
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
2141
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2142
1377
if(ret == -1){
2143
perror_plus("sigaction");
1378
perror("sigaction");
2144
1379
exitcode = EX_OSERR;
2145
1380
goto end;
2146
1381
}
2147
1382
}
2148
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2149
1384
if(ret == -1){
2150
perror_plus("sigaction");
1385
perror("sigaction");
2151
1386
return EX_OSERR;
2152
1387
}
2153
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
2154
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2155
1390
if(ret == -1){
2156
perror_plus("sigaction");
1391
perror("sigaction");
2157
1392
exitcode = EX_OSERR;
2158
1393
goto end;
2159
1394
}
2160
1395
}
2161
1396
2162
/* If no interfaces were specified, make a list */
2163
if(mc.interfaces == NULL){
2164
struct dirent **direntries;
2165
/* Look for any good interfaces */
2166
ret = scandir(sys_class_net, &direntries, good_interface,
2167
alphasort);
2168
if(ret >= 1){
2169
/* Add all found interfaces to interfaces list */
2170
for(int i = 0; i < ret; ++i){
2171
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2172
direntries[i]->d_name);
2173
if(ret_errno != 0){
2174
errno = ret_errno;
2175
perror_plus("argz_add");
2176
continue;
2177
}
2178
if(debug){
2179
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2180
direntries[i]->d_name);
2181
}
2182
}
2183
free(direntries);
1397
/* If the interface is down, bring it up */
1398
if(strcmp(interface, "none") != 0){
1399
if_index = (AvahiIfIndex) if_nametoindex(interface);
1400
if(if_index == 0){
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1402
exitcode = EX_UNAVAILABLE;
1403
goto end;
1404
}
1405
1406
if(quit_now){
1407
goto end;
1408
}
1409
1410
/* Re-raise priviliges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror("seteuid");
1415
}
1416
1417
#ifdef __linux__
1418
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1419
messages about the network interface to mess up the prompt */
1420
ret = klogctl(8, NULL, 5);
1421
bool restore_loglevel = true;
1422
if(ret == -1){
1423
restore_loglevel = false;
1424
perror("klogctl");
1425
}
1426
#endif /* __linux__ */
1427
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1429
if(sd < 0){
1430
perror("socket");
1431
exitcode = EX_OSERR;
1432
#ifdef __linux__
1433
if(restore_loglevel){
1434
ret = klogctl(7, NULL, 0);
1435
if(ret == -1){
1436
perror("klogctl");
1437
}
1438
}
1439
#endif /* __linux__ */
1440
/* Lower privileges */
1441
errno = 0;
1442
ret = seteuid(uid);
1443
if(ret == -1){
1444
perror("seteuid");
1445
}
1446
goto end;
1447
}
1448
strcpy(network.ifr_name, interface);
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1450
if(ret == -1){
1451
perror("ioctl SIOCGIFFLAGS");
1452
#ifdef __linux__
1453
if(restore_loglevel){
1454
ret = klogctl(7, NULL, 0);
1455
if(ret == -1){
1456
perror("klogctl");
1457
}
1458
}
1459
#endif /* __linux__ */
1460
exitcode = EX_OSERR;
1461
/* Lower privileges */
1462
errno = 0;
1463
ret = seteuid(uid);
1464
if(ret == -1){
1465
perror("seteuid");
1466
}
1467
goto end;
1468
}
1469
if((network.ifr_flags & IFF_UP) == 0){
1470
network.ifr_flags |= IFF_UP;
1471
take_down_interface = true;
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1473
if(ret == -1){
1474
take_down_interface = false;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1476
exitcode = EX_OSERR;
1477
#ifdef __linux__
1478
if(restore_loglevel){
1479
ret = klogctl(7, NULL, 0);
1480
if(ret == -1){
1481
perror("klogctl");
1482
}
1483
}
1484
#endif /* __linux__ */
1485
/* Lower privileges */
1486
errno = 0;
1487
ret = seteuid(uid);
1488
if(ret == -1){
1489
perror("seteuid");
1490
}
1491
goto end;
1492
}
1493
}
1494
/* sleep checking until interface is running */
1495
for(int i=0; i < delay * 4; i++){
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1497
if(ret == -1){
1498
perror("ioctl SIOCGIFFLAGS");
1499
} else if(network.ifr_flags & IFF_RUNNING){
1500
break;
1501
}
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
1503
ret = nanosleep(&sleeptime, NULL);
1504
if(ret == -1 and errno != EINTR){
1505
perror("nanosleep");
1506
}
1507
}
1508
if(not take_down_interface){
1509
/* We won't need the socket anymore */
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1511
if(ret == -1){
1512
perror("close");
1513
}
1514
}
1515
#ifdef __linux__
1516
if(restore_loglevel){
1517
/* Restores kernel loglevel to default */
1518
ret = klogctl(7, NULL, 0);
1519
if(ret == -1){
1520
perror("klogctl");
1521
}
1522
}
1523
#endif /* __linux__ */
1524
/* Lower privileges */
1525
errno = 0;
1526
if(take_down_interface){
1527
/* Lower privileges */
1528
ret = seteuid(uid);
1529
if(ret == -1){
1530
perror("seteuid");
1531
}
2184
1532
} else {
2185
free(direntries);
2186
fprintf_plus(stderr, "Could not find a network interface\n");
2187
exitcode = EXIT_FAILURE;
2188
goto end;
2189
}
2190
}
2191
2192
/* Bring up interfaces which are down, and remove any "none"s */
2193
{
2194
char *interface = NULL;
2195
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2196
interface))){
2197
/* If interface name is "none", stop bringing up interfaces.
2198
Also remove all instances of "none" from the list */
2199
if(strcmp(interface, "none") == 0){
2200
argz_delete(&mc.interfaces, &mc.interfaces_size,
2201
interface);
2202
interface = NULL;
2203
while((interface = argz_next(mc.interfaces,
2204
mc.interfaces_size, interface))){
2205
if(strcmp(interface, "none") == 0){
2206
argz_delete(&mc.interfaces, &mc.interfaces_size,
2207
interface);
2208
interface = NULL;
2209
}
2210
}
2211
break;
2212
}
2213
bool interface_was_up = interface_is_up(interface);
2214
ret = bring_up_interface(interface, delay);
2215
if(not interface_was_up){
2216
if(ret != 0){
2217
errno = ret;
2218
perror_plus("Failed to bring up interface");
2219
} else {
2220
ret_errno = argz_add(&interfaces_to_take_down,
2221
&interfaces_to_take_down_size,
2222
interface);
2223
if(ret_errno != 0){
2224
errno = ret_errno;
2225
perror_plus("argz_add");
2226
}
2227
}
2228
}
2229
}
2230
if(debug and (interfaces_to_take_down == NULL)){
2231
fprintf_plus(stderr, "No interfaces were brought up\n");
2232
}
2233
}
2234
2235
/* If we only got one interface, explicitly use only that one */
2236
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2237
if(debug){
2238
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2239
mc.interfaces);
2240
}
2241
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1533
/* Lower privileges permanently */
1534
ret = setuid(uid);
1535
if(ret == -1){
1536
perror("setuid");
1537
}
1538
}
2242
1539
}
2243
1540
2244
1541
if(quit_now){
2245
1542
goto end;
2246
1543
}
2247
1544
2248
ret = init_gnutls_global(pubkey, seckey, &mc);
1545
ret = init_gnutls_global(pubkey, seckey);
2249
1546
if(ret == -1){
2250
fprintf_plus(stderr, "init_gnutls_global failed\n");
1547
fprintf(stderr, "init_gnutls_global failed\n");
2251
1548
exitcode = EX_UNAVAILABLE;
2252
1549
goto end;
2253
1550
} else {
2258
1555
goto end;
2259
1556
}
2260
1557
1558
tempdir_created = true;
2261
1559
if(mkdtemp(tempdir) == NULL){
2262
perror_plus("mkdtemp");
1560
tempdir_created = false;
1561
perror("mkdtemp");
2263
1562
goto end;
2264
1563
}
2265
tempdir_created = true;
2266
1564
2267
1565
if(quit_now){
2268
1566
goto end;
2269
1567
}
2270
1568
2271
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2272
fprintf_plus(stderr, "init_gpgme failed\n");
1569
if(not init_gpgme(pubkey, seckey, tempdir)){
1570
fprintf(stderr, "init_gpgme failed\n");
2273
1571
exitcode = EX_UNAVAILABLE;
2274
1572
goto end;
2275
1573
} else {
2284
1582
/* Connect directly, do not use Zeroconf */
2285
1583
/* (Mainly meant for debugging) */
2286
1584
char *address = strrchr(connect_to, ':');
2287
2288
1585
if(address == NULL){
2289
fprintf_plus(stderr, "No colon in address\n");
1586
fprintf(stderr, "No colon in address\n");
2290
1587
exitcode = EX_USAGE;
2291
1588
goto end;
2292
1589
}
2295
1592
goto end;
2296
1593
}
2297
1594
2298
in_port_t port;
1595
uint16_t port;
2299
1596
errno = 0;
2300
1597
tmpmax = strtoimax(address+1, &tmp, 10);
2301
1598
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2302
or tmpmax != (in_port_t)tmpmax){
2303
fprintf_plus(stderr, "Bad port number\n");
1599
or tmpmax != (uint16_t)tmpmax){
1600
fprintf(stderr, "Bad port number\n");
2304
1601
exitcode = EX_USAGE;
2305
1602
goto end;
2306
1603
}
2307
1604
2308
1605
if(quit_now){
2309
1606
goto end;
2310
1607
}
2311
1608
2312
port = (in_port_t)tmpmax;
1609
port = (uint16_t)tmpmax;
2313
1610
*address = '\0';
1611
address = connect_to;
2314
1612
/* Colon in address indicates IPv6 */
2315
1613
int af;
2316
if(strchr(connect_to, ':') != NULL){
1614
if(strchr(address, ':') != NULL){
2317
1615
af = AF_INET6;
2318
/* Accept [] around IPv6 address - see RFC 5952 */
2319
if(connect_to[0] == '[' and address[-1] == ']')
2320
{
2321
connect_to++;
2322
address[-1] = '\0';
2323
}
2324
1616
} else {
2325
1617
af = AF_INET;
2326
1618
}
2327
address = connect_to;
2328
1619
2329
1620
if(quit_now){
2330
1621
goto end;
2331
1622
}
2332
1623
2333
1624
while(not quit_now){
2334
ret = start_mandos_communication(address, port, if_index, af,
2335
&mc);
1625
ret = start_mandos_communication(address, port, if_index, af);
2336
1626
if(quit_now or ret == 0){
2337
1627
break;
2338
1628
}
2339
if(debug){
2340
fprintf_plus(stderr, "Retrying in %d seconds\n",
2341
(int)retry_interval);
2342
}
2343
sleep((unsigned int)retry_interval);
2344
}
2345
1629
sleep(15);
1630
};
1631
2346
1632
if (not quit_now){
2347
1633
exitcode = EXIT_SUCCESS;
2348
1634
}
2349
1635
2350
1636
goto end;
2351
1637
}
2352
1638
2364
1650
config.publish_domain = 0;
2365
1651
2366
1652
/* Allocate a new server */
2367
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2368
&config, NULL, NULL, &ret_errno);
1653
mc.server = avahi_server_new(avahi_simple_poll_get
1654
(mc.simple_poll), &config, NULL,
1655
NULL, &error);
2369
1656
2370
1657
/* Free the Avahi configuration data */
2371
1658
avahi_server_config_free(&config);
2373
1660
2374
1661
/* Check if creating the Avahi server object succeeded */
2375
1662
if(mc.server == NULL){
2376
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2377
avahi_strerror(ret_errno));
1663
fprintf(stderr, "Failed to create Avahi server: %s\n",
1664
avahi_strerror(error));
2378
1665
exitcode = EX_UNAVAILABLE;
2379
1666
goto end;
2380
1667
}
2386
1673
/* Create the Avahi service browser */
2387
1674
sb = avahi_s_service_browser_new(mc.server, if_index,
2388
1675
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2389
NULL, 0, browse_callback,
2390
(void *)&mc);
1676
NULL, 0, browse_callback, NULL);
2391
1677
if(sb == NULL){
2392
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2393
avahi_strerror(avahi_server_errno(mc.server)));
1678
fprintf(stderr, "Failed to create service browser: %s\n",
1679
avahi_strerror(avahi_server_errno(mc.server)));
2394
1680
exitcode = EX_UNAVAILABLE;
2395
1681
goto end;
2396
1682
}
2402
1688
/* Run the main loop */
2403
1689
2404
1690
if(debug){
2405
fprintf_plus(stderr, "Starting Avahi loop search\n");
2406
}
2407
2408
ret = avahi_loop_with_timeout(simple_poll,
2409
(int)(retry_interval * 1000), &mc);
2410
if(debug){
2411
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2412
(ret == 0) ? "successfully" : "with error");
2413
}
1691
fprintf(stderr, "Starting Avahi loop search\n");
1692
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
2414
1695
2415
1696
end:
2416
1697
2417
1698
if(debug){
2418
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1699
fprintf(stderr, "%s exiting\n", argv[0]);
2419
1700
}
2420
1701
2421
1702
/* Cleanup things */
2422
free(mc.interfaces);
2423
2424
1703
if(sb != NULL)
2425
1704
avahi_s_service_browser_free(sb);
2426
1705
2427
1706
if(mc.server != NULL)
2428
1707
avahi_server_free(mc.server);
2429
1708
2430
if(simple_poll != NULL)
2431
avahi_simple_poll_free(simple_poll);
1709
if(mc.simple_poll != NULL)
1710
avahi_simple_poll_free(mc.simple_poll);
2432
1711
2433
1712
if(gnutls_initialized){
2434
1713
gnutls_certificate_free_credentials(mc.cred);
2440
1719
gpgme_release(mc.ctx);
2441
1720
}
2442
1721
2443
/* Cleans up the circular linked list of Mandos servers the client
2444
has seen */
2445
if(mc.current_server != NULL){
2446
mc.current_server->prev->next = NULL;
2447
while(mc.current_server != NULL){
2448
server *next = mc.current_server->next;
2449
free(mc.current_server);
2450
mc.current_server = next;
1722
/* Take down the network interface */
1723
if(take_down_interface){
1724
/* Re-raise priviliges */
1725
errno = 0;
1726
ret = seteuid(0);
1727
if(ret == -1){
1728
perror("seteuid");
2451
1729
}
2452
}
2453
2454
/* Re-raise priviliges */
2455
{
2456
raise_privileges();
2457
2458
/* Run network hooks */
2459
run_network_hooks("stop", interfaces_hooks != NULL ?
2460
interfaces_hooks : "", delay);
2461
2462
/* Take down the network interfaces which were brought up */
2463
{
2464
char *interface = NULL;
2465
while((interface=argz_next(interfaces_to_take_down,
2466
interfaces_to_take_down_size,
2467
interface))){
2468
ret_errno = take_down_interface(interface);
2469
if(ret_errno != 0){
2470
errno = ret_errno;
2471
perror_plus("Failed to take down interface");
1730
if(geteuid() == 0){
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1732
if(ret == -1){
1733
perror("ioctl SIOCGIFFLAGS");
1734
} else if(network.ifr_flags & IFF_UP) {
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1737
if(ret == -1){
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2472
1739
}
2473
1740
}
2474
if(debug and (interfaces_to_take_down == NULL)){
2475
fprintf_plus(stderr, "No interfaces needed to be taken"
2476
" down\n");
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1742
if(ret == -1){
1743
perror("close");
1744
}
1745
/* Lower privileges permanently */
1746
errno = 0;
1747
ret = setuid(uid);
1748
if(ret == -1){
1749
perror("setuid");
2477
1750
}
2478
1751
}
2479
2480
lower_privileges_permanently();
2481
1752
}
2482
1753
2483
free(interfaces_to_take_down);
2484
free(interfaces_hooks);
2485
2486
/* Removes the GPGME temp directory and all files inside */
1754
/* Removes the temp directory used by GPGME */
2487
1755
if(tempdir_created){
2488
struct dirent **direntries = NULL;
2489
struct dirent *direntry = NULL;
2490
int numentries = scandir(tempdir, &direntries, notdotentries,
2491
alphasort);
2492
if (numentries > 0){
2493
for(int i = 0; i < numentries; i++){
2494
direntry = direntries[i];
1756
DIR *d;
1757
struct dirent *direntry;
1758
d = opendir(tempdir);
1759
if(d == NULL){
1760
if(errno != ENOENT){
1761
perror("opendir");
1762
}
1763
} else {
1764
while(true){
1765
direntry = readdir(d);
1766
if(direntry == NULL){
1767
break;
1768
}
1769
/* Skip "." and ".." */
1770
if(direntry->d_name[0] == '.'
1771
and (direntry->d_name[1] == '\0'
1772
or (direntry->d_name[1] == '.'
1773
and direntry->d_name[2] == '\0'))){
1774
continue;
1775
}
2495
1776
char *fullname = NULL;
2496
1777
ret = asprintf(&fullname, "%s/%s", tempdir,
2497
1778
direntry->d_name);
2498
1779
if(ret < 0){
2499
perror_plus("asprintf");
1780
perror("asprintf");
2500
1781
continue;
2501
1782
}
2502
1783
ret = remove(fullname);
2503
1784
if(ret == -1){
2504
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2505
strerror(errno));
1785
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1786
strerror(errno));
2506
1787
}
2507
1788
free(fullname);
2508
1789
}
2509
}
2510
2511
/* need to clean even if 0 because man page doesn't specify */
2512
free(direntries);
2513
if (numentries == -1){
2514
perror_plus("scandir");
1790
closedir(d);
2515
1791
}
2516
1792
ret = rmdir(tempdir);
2517
1793
if(ret == -1 and errno != ENOENT){
2518
perror_plus("rmdir");
1794
perror("rmdir");
2519
1795
}
2520
1796
}
2521
1797
2526
1802
&old_sigterm_action,
2527
1803
NULL));
2528
1804
if(ret == -1){
2529
perror_plus("sigaction");
1805
perror("sigaction");
2530
1806
}
2531
1807
do {
2532
1808
ret = raise(signal_received);
2533
1809
} while(ret != 0 and errno == EINTR);
2534
1810
if(ret != 0){
2535
perror_plus("raise");
1811
perror("raise");
2536
1812
abort();
2537
1813
}
2538
1814
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0