(root)/mandos/release
» Revision
24.1.172
(compared to revision 237.7.216)
: plugins.d/mandos-client.c
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- Committer: Björn Påhlsson
- Date: 2011-06-18 22:51:12 UTC
- mto: (237.7.33 trunk)
- mto: This revision was merged to the branch mainline in revision 284.
- Revision ID: belorn@fukt.bsnet.se-20110618225112-rnt2m4ek32758f80
using scandir instead of readdir
- files removed:
- debian/mandos-client.examples
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
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
inet_pton(), connect(),
59
getnameinfo() */
58
inet_pton(), connect() */
60
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
63
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
63
strtoimax() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
75
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
85
84
raise() */
86
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
#include <argz.h> /* argz_add_sep(), argz_next(),
92
argz_delete(), argz_append(),
93
argz_stringify(), argz_add(),
94
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
97
87
98
88
#ifdef __linux__
99
89
#include <sys/klog.h> /* klogctl() */
117
107
init_gnutls_session(),
118
108
GNUTLS_* */
119
109
#include <gnutls/openpgp.h>
120
/* gnutls_certificate_set_openpgp_key_file(),
121
GNUTLS_OPENPGP_FMT_BASE64 */
110
/* gnutls_certificate_set_openpgp_key_file(),
111
GNUTLS_OPENPGP_FMT_BASE64 */
122
112
123
113
/* GPGME */
124
114
#include <gpgme.h> /* All GPGME types, constants and
132
122
#define PATHDIR "/conf/conf.d/mandos"
133
123
#define SECKEY "seckey.txt"
134
124
#define PUBKEY "pubkey.txt"
135
#define HOOKDIR "/lib/mandos/network-hooks.d"
136
125
137
126
bool debug = false;
138
127
static const char mandos_protocol_version[] = "1";
139
128
const char *argp_program_version = "mandos-client " VERSION;
140
const char *argp_program_bug_address = "<mandos@recompile.se>";
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
141
130
static const char sys_class_net[] = "/sys/class/net";
142
131
char *connect_to = NULL;
143
const char *hookdir = HOOKDIR;
144
uid_t uid = 65534;
145
gid_t gid = 65534;
146
147
/* Doubly linked list that need to be circularly linked when used */
148
typedef struct server{
149
const char *ip;
150
in_port_t port;
151
AvahiIfIndex if_index;
152
int af;
153
struct timespec last_seen;
154
struct server *next;
155
struct server *prev;
156
} server;
157
132
158
133
/* Used for passing in values through the Avahi callback functions */
159
134
typedef struct {
135
AvahiSimplePoll *simple_poll;
160
136
AvahiServer *server;
161
137
gnutls_certificate_credentials_t cred;
162
138
unsigned int dh_bits;
163
139
gnutls_dh_params_t dh_params;
164
140
const char *priority;
165
141
gpgme_ctx_t ctx;
166
server *current_server;
167
char *interfaces;
168
size_t interfaces_size;
169
142
} mandos_context;
170
143
171
/* global so signal handler can reach it*/
172
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" };
173
148
174
149
sig_atomic_t quit_now = 0;
175
150
int signal_received = 0;
176
151
177
/* Function to use when printing errors */
178
void perror_plus(const char *print_text){
179
int e = errno;
180
fprintf(stderr, "Mandos plugin %s: ",
181
program_invocation_short_name);
182
errno = e;
183
perror(print_text);
184
}
185
186
__attribute__((format (gnu_printf, 2, 3)))
187
int fprintf_plus(FILE *stream, const char *format, ...){
188
va_list ap;
189
va_start (ap, format);
190
191
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
192
program_invocation_short_name));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
194
}
195
196
152
/*
197
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
198
154
* bytes. "buffer_capacity" is how much is currently allocated,
199
155
* "buffer_length" is how much is already used.
200
156
*/
201
157
size_t incbuffer(char **buffer, size_t buffer_length,
202
size_t buffer_capacity){
158
size_t buffer_capacity){
203
159
if(buffer_length + BUFFER_SIZE > buffer_capacity){
204
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
205
if(new_buf == NULL){
206
int old_errno = errno;
207
free(*buffer);
208
errno = old_errno;
209
*buffer = NULL;
160
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
161
if(buffer == NULL){
210
162
return 0;
211
163
}
212
*buffer = new_buf;
213
164
buffer_capacity += BUFFER_SIZE;
214
165
}
215
166
return buffer_capacity;
216
167
}
217
168
218
/* Add server to set of servers to retry periodically */
219
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
220
int af, server **current_server){
221
int ret;
222
server *new_server = malloc(sizeof(server));
223
if(new_server == NULL){
224
perror_plus("malloc");
225
return false;
226
}
227
*new_server = (server){ .ip = strdup(ip),
228
.port = port,
229
.if_index = if_index,
230
.af = af };
231
if(new_server->ip == NULL){
232
perror_plus("strdup");
233
return false;
234
}
235
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
236
if(ret == -1){
237
perror_plus("clock_gettime");
238
return false;
239
}
240
/* Special case of first server */
241
if(*current_server == NULL){
242
new_server->next = new_server;
243
new_server->prev = new_server;
244
*current_server = new_server;
245
/* Place the new server last in the list */
246
} else {
247
new_server->next = *current_server;
248
new_server->prev = (*current_server)->prev;
249
new_server->prev->next = new_server;
250
(*current_server)->prev = new_server;
251
}
252
return true;
253
}
254
255
169
/*
256
170
* Initialize GPGME.
257
171
*/
258
static bool init_gpgme(const char *seckey, const char *pubkey,
259
const char *tempdir, mandos_context *mc){
172
static bool init_gpgme(const char *seckey,
173
const char *pubkey, const char *tempdir){
260
174
gpgme_error_t rc;
261
175
gpgme_engine_info_t engine_info;
262
176
177
263
178
/*
264
179
* Helper function to insert pub and seckey to the engine keyring.
265
180
*/
270
185
271
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
272
187
if(fd == -1){
273
perror_plus("open");
188
perror("open");
274
189
return false;
275
190
}
276
191
277
192
rc = gpgme_data_new_from_fd(&pgp_data, fd);
278
193
if(rc != GPG_ERR_NO_ERROR){
279
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
280
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));
281
196
return false;
282
197
}
283
198
284
rc = gpgme_op_import(mc->ctx, pgp_data);
199
rc = gpgme_op_import(mc.ctx, pgp_data);
285
200
if(rc != GPG_ERR_NO_ERROR){
286
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
287
gpgme_strsource(rc), gpgme_strerror(rc));
201
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
202
gpgme_strsource(rc), gpgme_strerror(rc));
288
203
return false;
289
204
}
290
205
291
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
292
207
if(ret == -1){
293
perror_plus("close");
208
perror("close");
294
209
}
295
210
gpgme_data_release(pgp_data);
296
211
return true;
297
212
}
298
213
299
214
if(debug){
300
fprintf_plus(stderr, "Initializing GPGME\n");
215
fprintf(stderr, "Initializing GPGME\n");
301
216
}
302
217
303
218
/* Init GPGME */
304
219
gpgme_check_version(NULL);
305
220
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
306
221
if(rc != GPG_ERR_NO_ERROR){
307
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
308
gpgme_strsource(rc), gpgme_strerror(rc));
222
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
223
gpgme_strsource(rc), gpgme_strerror(rc));
309
224
return false;
310
225
}
311
226
312
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
313
228
rc = gpgme_get_engine_info(&engine_info);
314
229
if(rc != GPG_ERR_NO_ERROR){
315
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
316
gpgme_strsource(rc), gpgme_strerror(rc));
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
231
gpgme_strsource(rc), gpgme_strerror(rc));
317
232
return false;
318
233
}
319
234
while(engine_info != NULL){
325
240
engine_info = engine_info->next;
326
241
}
327
242
if(engine_info == NULL){
328
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
329
tempdir);
243
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
330
244
return false;
331
245
}
332
246
333
247
/* Create new GPGME "context" */
334
rc = gpgme_new(&(mc->ctx));
248
rc = gpgme_new(&(mc.ctx));
335
249
if(rc != GPG_ERR_NO_ERROR){
336
fprintf_plus(stderr, "Mandos plugin mandos-client: "
337
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
338
gpgme_strerror(rc));
250
fprintf(stderr, "bad gpgme_new: %s: %s\n",
251
gpgme_strsource(rc), gpgme_strerror(rc));
339
252
return false;
340
253
}
341
254
352
265
*/
353
266
static ssize_t pgp_packet_decrypt(const char *cryptotext,
354
267
size_t crypto_size,
355
char **plaintext,
356
mandos_context *mc){
268
char **plaintext){
357
269
gpgme_data_t dh_crypto, dh_plain;
358
270
gpgme_error_t rc;
359
271
ssize_t ret;
361
273
ssize_t plaintext_length = 0;
362
274
363
275
if(debug){
364
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
365
277
}
366
278
367
279
/* Create new GPGME data buffer from memory cryptotext */
368
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
369
281
0);
370
282
if(rc != GPG_ERR_NO_ERROR){
371
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
372
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));
373
285
return -1;
374
286
}
375
287
376
288
/* Create new empty GPGME data buffer for the plaintext */
377
289
rc = gpgme_data_new(&dh_plain);
378
290
if(rc != GPG_ERR_NO_ERROR){
379
fprintf_plus(stderr, "Mandos plugin mandos-client: "
380
"bad gpgme_data_new: %s: %s\n",
381
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
382
293
gpgme_data_release(dh_crypto);
383
294
return -1;
384
295
}
385
296
386
297
/* Decrypt data from the cryptotext data buffer to the plaintext
387
298
data buffer */
388
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
389
300
if(rc != GPG_ERR_NO_ERROR){
390
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
391
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
392
303
plaintext_length = -1;
393
304
if(debug){
394
305
gpgme_decrypt_result_t result;
395
result = gpgme_op_decrypt_result(mc->ctx);
306
result = gpgme_op_decrypt_result(mc.ctx);
396
307
if(result == NULL){
397
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
398
309
} else {
399
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
400
result->unsupported_algorithm);
401
fprintf_plus(stderr, "Wrong key usage: %u\n",
402
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);
403
314
if(result->file_name != NULL){
404
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
405
316
}
406
317
gpgme_recipient_t recipient;
407
318
recipient = result->recipients;
408
319
while(recipient != NULL){
409
fprintf_plus(stderr, "Public key algorithm: %s\n",
410
gpgme_pubkey_algo_name
411
(recipient->pubkey_algo));
412
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
413
fprintf_plus(stderr, "Secret key available: %s\n",
414
recipient->status == GPG_ERR_NO_SECKEY
415
? "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");
416
326
recipient = recipient->next;
417
327
}
418
328
}
421
331
}
422
332
423
333
if(debug){
424
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
334
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
425
335
}
426
336
427
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
428
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
429
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
430
340
plaintext_length = -1;
431
341
goto decrypt_end;
432
342
}
434
344
*plaintext = NULL;
435
345
while(true){
436
346
plaintext_capacity = incbuffer(plaintext,
437
(size_t)plaintext_length,
438
plaintext_capacity);
347
(size_t)plaintext_length,
348
plaintext_capacity);
439
349
if(plaintext_capacity == 0){
440
perror_plus("incbuffer");
441
plaintext_length = -1;
442
goto decrypt_end;
350
perror("incbuffer");
351
plaintext_length = -1;
352
goto decrypt_end;
443
353
}
444
354
445
355
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
450
360
break;
451
361
}
452
362
if(ret < 0){
453
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
454
364
plaintext_length = -1;
455
365
goto decrypt_end;
456
366
}
458
368
}
459
369
460
370
if(debug){
461
fprintf_plus(stderr, "Decrypted password is: ");
371
fprintf(stderr, "Decrypted password is: ");
462
372
for(ssize_t i = 0; i < plaintext_length; i++){
463
373
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
464
374
}
476
386
}
477
387
478
388
static const char * safer_gnutls_strerror(int value){
479
const char *ret = gnutls_strerror(value);
389
const char *ret = gnutls_strerror(value); /* Spurious warning from
390
-Wunreachable-code */
480
391
if(ret == NULL)
481
392
ret = "(unknown)";
482
393
return ret;
485
396
/* GnuTLS log function callback */
486
397
static void debuggnutls(__attribute__((unused)) int level,
487
398
const char* string){
488
fprintf_plus(stderr, "GnuTLS: %s", string);
399
fprintf(stderr, "GnuTLS: %s", string);
489
400
}
490
401
491
402
static int init_gnutls_global(const char *pubkeyfilename,
492
const char *seckeyfilename,
493
mandos_context *mc){
403
const char *seckeyfilename){
494
404
int ret;
495
405
496
406
if(debug){
497
fprintf_plus(stderr, "Initializing GnuTLS\n");
407
fprintf(stderr, "Initializing GnuTLS\n");
498
408
}
499
409
500
410
ret = gnutls_global_init();
501
411
if(ret != GNUTLS_E_SUCCESS){
502
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
503
safer_gnutls_strerror(ret));
412
fprintf(stderr, "GnuTLS global_init: %s\n",
413
safer_gnutls_strerror(ret));
504
414
return -1;
505
415
}
506
416
513
423
}
514
424
515
425
/* OpenPGP credentials */
516
ret = gnutls_certificate_allocate_credentials(&mc->cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
517
427
if(ret != GNUTLS_E_SUCCESS){
518
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
519
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));
520
433
gnutls_global_deinit();
521
434
return -1;
522
435
}
523
436
524
437
if(debug){
525
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
526
" secret key %s as GnuTLS credentials\n",
527
pubkeyfilename,
528
seckeyfilename);
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
440
seckeyfilename);
529
441
}
530
442
531
443
ret = gnutls_certificate_set_openpgp_key_file
532
(mc->cred, pubkeyfilename, seckeyfilename,
444
(mc.cred, pubkeyfilename, seckeyfilename,
533
445
GNUTLS_OPENPGP_FMT_BASE64);
534
446
if(ret != GNUTLS_E_SUCCESS){
535
fprintf_plus(stderr,
536
"Error[%d] while reading the OpenPGP key pair ('%s',"
537
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
538
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
539
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));
540
452
goto globalfail;
541
453
}
542
454
543
455
/* GnuTLS server initialization */
544
ret = gnutls_dh_params_init(&mc->dh_params);
456
ret = gnutls_dh_params_init(&mc.dh_params);
545
457
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
547
" initialization: %s\n",
548
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
549
460
goto globalfail;
550
461
}
551
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
552
463
if(ret != GNUTLS_E_SUCCESS){
553
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
554
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
555
466
goto globalfail;
556
467
}
557
468
558
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
469
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
559
470
560
471
return 0;
561
472
562
473
globalfail:
563
474
564
gnutls_certificate_free_credentials(mc->cred);
475
gnutls_certificate_free_credentials(mc.cred);
565
476
gnutls_global_deinit();
566
gnutls_dh_params_deinit(mc->dh_params);
477
gnutls_dh_params_deinit(mc.dh_params);
567
478
return -1;
568
479
}
569
480
570
static int init_gnutls_session(gnutls_session_t *session,
571
mandos_context *mc){
481
static int init_gnutls_session(gnutls_session_t *session){
572
482
int ret;
573
483
/* GnuTLS session creation */
574
484
do {
578
488
}
579
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
580
490
if(ret != GNUTLS_E_SUCCESS){
581
fprintf_plus(stderr,
582
"Error in GnuTLS session initialization: %s\n",
583
safer_gnutls_strerror(ret));
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
492
safer_gnutls_strerror(ret));
584
493
}
585
494
586
495
{
587
496
const char *err;
588
497
do {
589
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
590
499
if(quit_now){
591
500
gnutls_deinit(*session);
592
501
return -1;
593
502
}
594
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
595
504
if(ret != GNUTLS_E_SUCCESS){
596
fprintf_plus(stderr, "Syntax error at: %s\n", err);
597
fprintf_plus(stderr, "GnuTLS error: %s\n",
598
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));
599
508
gnutls_deinit(*session);
600
509
return -1;
601
510
}
603
512
604
513
do {
605
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
606
mc->cred);
515
mc.cred);
607
516
if(quit_now){
608
517
gnutls_deinit(*session);
609
518
return -1;
610
519
}
611
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
612
521
if(ret != GNUTLS_E_SUCCESS){
613
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
614
safer_gnutls_strerror(ret));
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
523
safer_gnutls_strerror(ret));
615
524
gnutls_deinit(*session);
616
525
return -1;
617
526
}
619
528
/* ignore client certificate if any. */
620
529
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
621
530
622
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
531
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
623
532
624
533
return 0;
625
534
}
629
538
__attribute__((unused)) const char *txt){}
630
539
631
540
/* Called when a Mandos server is found */
632
static int start_mandos_communication(const char *ip, in_port_t port,
541
static int start_mandos_communication(const char *ip, uint16_t port,
633
542
AvahiIfIndex if_index,
634
int af, mandos_context *mc){
543
int af){
635
544
int ret, tcp_sd = -1;
636
545
ssize_t sret;
637
546
union {
662
571
pf = PF_INET;
663
572
break;
664
573
default:
665
fprintf_plus(stderr, "Bad address family: %d\n", af);
574
fprintf(stderr, "Bad address family: %d\n", af);
666
575
errno = EINVAL;
667
576
return -1;
668
577
}
669
578
670
/* If the interface is specified and we have a list of interfaces */
671
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
672
/* Check if the interface is one of the interfaces we are using */
673
bool match = false;
674
{
675
char *interface = NULL;
676
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
677
interface))){
678
if(if_nametoindex(interface) == (unsigned int)if_index){
679
match = true;
680
break;
681
}
682
}
683
}
684
if(not match){
685
/* This interface does not match any in the list, so we don't
686
connect to the server */
687
if(debug){
688
char interface[IF_NAMESIZE];
689
if(if_indextoname((unsigned int)if_index, interface) == NULL){
690
perror_plus("if_indextoname");
691
} else {
692
fprintf_plus(stderr, "Skipping server on non-used interface"
693
" \"%s\"\n",
694
if_indextoname((unsigned int)if_index,
695
interface));
696
}
697
}
698
return -1;
699
}
700
}
701
702
ret = init_gnutls_session(&session, mc);
579
ret = init_gnutls_session(&session);
703
580
if(ret != 0){
704
581
return -1;
705
582
}
706
583
707
584
if(debug){
708
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
709
PRIuMAX "\n", ip, (uintmax_t)port);
585
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
586
"\n", ip, port);
710
587
}
711
588
712
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
713
590
if(tcp_sd < 0){
714
591
int e = errno;
715
perror_plus("socket");
592
perror("socket");
716
593
errno = e;
717
594
goto mandos_end;
718
595
}
732
609
}
733
610
if(ret < 0 ){
734
611
int e = errno;
735
perror_plus("inet_pton");
612
perror("inet_pton");
736
613
errno = e;
737
614
goto mandos_end;
738
615
}
739
616
if(ret == 0){
740
617
int e = errno;
741
fprintf_plus(stderr, "Bad address: %s\n", ip);
618
fprintf(stderr, "Bad address: %s\n", ip);
742
619
errno = e;
743
620
goto mandos_end;
744
621
}
745
622
if(af == AF_INET6){
746
to.in6.sin6_port = htons(port);
747
#ifdef __GNUC__
748
#pragma GCC diagnostic push
749
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
750
#endif
623
to.in6.sin6_port = htons(port); /* Spurious warnings from
624
-Wconversion and
625
-Wunreachable-code */
626
751
627
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
752
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower */
753
#ifdef __GNUC__
754
#pragma GCC diagnostic pop
755
#endif
628
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
629
-Wunreachable-code*/
756
630
if(if_index == AVAHI_IF_UNSPEC){
757
fprintf_plus(stderr, "An IPv6 link-local address is"
758
" incomplete without a network interface\n");
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
" without a network interface\n");
759
633
errno = EINVAL;
760
634
goto mandos_end;
761
635
}
763
637
to.in6.sin6_scope_id = (uint32_t)if_index;
764
638
}
765
639
} else {
766
to.in.sin_port = htons(port);
640
to.in.sin_port = htons(port); /* Spurious warnings from
641
-Wconversion and
642
-Wunreachable-code */
767
643
}
768
644
769
645
if(quit_now){
775
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
776
652
char interface[IF_NAMESIZE];
777
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
778
perror_plus("if_indextoname");
654
perror("if_indextoname");
779
655
} else {
780
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
781
"\n", ip, interface, (uintmax_t)port);
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
ip, interface, port);
782
658
}
783
659
} else {
784
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
785
ip, (uintmax_t)port);
660
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
661
port);
786
662
}
787
663
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
788
664
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
665
const char *pcret;
789
666
if(af == AF_INET6){
790
ret = getnameinfo((struct sockaddr *)&(to.in6), sizeof(to.in6),
791
addrstr, sizeof(addrstr), NULL, 0,
792
NI_NUMERICHOST);
667
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
668
sizeof(addrstr));
793
669
} else {
794
ret = getnameinfo((struct sockaddr *)&(to.in), sizeof(to.in),
795
addrstr, sizeof(addrstr), NULL, 0,
796
NI_NUMERICHOST);
670
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
671
sizeof(addrstr));
797
672
}
798
if(ret == EAI_SYSTEM){
799
perror_plus("getnameinfo");
800
} else if(ret != 0) {
801
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
802
} else if(strcmp(addrstr, ip) != 0){
803
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
673
if(pcret == NULL){
674
perror("inet_ntop");
675
} else {
676
if(strcmp(addrstr, ip) != 0){
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
678
}
804
679
}
805
680
}
806
681
817
692
if(ret < 0){
818
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
819
694
int e = errno;
820
perror_plus("connect");
695
perror("connect");
821
696
errno = e;
822
697
}
823
698
goto mandos_end;
833
708
while(true){
834
709
size_t out_size = strlen(out);
835
710
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
836
out_size - written));
711
out_size - written));
837
712
if(ret == -1){
838
713
int e = errno;
839
perror_plus("write");
714
perror("write");
840
715
errno = e;
841
716
goto mandos_end;
842
717
}
859
734
}
860
735
861
736
if(debug){
862
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
737
fprintf(stderr, "Establishing TLS session with %s\n", ip);
863
738
}
864
739
865
740
if(quit_now){
866
741
errno = EINTR;
867
742
goto mandos_end;
868
743
}
869
870
/* This casting via intptr_t is to eliminate warning about casting
871
an int to a pointer type. This is exactly how the GnuTLS Guile
872
function "set-session-transport-fd!" does it. */
873
gnutls_transport_set_ptr(session,
874
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
744
745
/* Spurious warnings from -Wint-to-pointer-cast */
746
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
875
747
876
748
if(quit_now){
877
749
errno = EINTR;
888
760
889
761
if(ret != GNUTLS_E_SUCCESS){
890
762
if(debug){
891
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
763
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
892
764
gnutls_perror(ret);
893
765
}
894
766
errno = EPROTO;
898
770
/* Read OpenPGP packet that contains the wanted password */
899
771
900
772
if(debug){
901
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
902
" %s\n", ip);
773
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
774
ip);
903
775
}
904
776
905
777
while(true){
910
782
}
911
783
912
784
buffer_capacity = incbuffer(&buffer, buffer_length,
913
buffer_capacity);
785
buffer_capacity);
914
786
if(buffer_capacity == 0){
915
787
int e = errno;
916
perror_plus("incbuffer");
788
perror("incbuffer");
917
789
errno = e;
918
790
goto mandos_end;
919
791
}
943
815
}
944
816
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
945
817
if(ret < 0){
946
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
947
"***\n");
818
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
948
819
gnutls_perror(ret);
949
820
errno = EPROTO;
950
821
goto mandos_end;
951
822
}
952
823
break;
953
824
default:
954
fprintf_plus(stderr, "Unknown error while reading data from"
955
" encrypted session with Mandos server\n");
825
fprintf(stderr, "Unknown error while reading data from"
826
" encrypted session with Mandos server\n");
956
827
gnutls_bye(session, GNUTLS_SHUT_RDWR);
957
828
errno = EIO;
958
829
goto mandos_end;
963
834
}
964
835
965
836
if(debug){
966
fprintf_plus(stderr, "Closing TLS session\n");
837
fprintf(stderr, "Closing TLS session\n");
967
838
}
968
839
969
840
if(quit_now){
981
852
982
853
if(buffer_length > 0){
983
854
ssize_t decrypted_buffer_size;
984
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
985
&decrypted_buffer, mc);
855
decrypted_buffer_size = pgp_packet_decrypt(buffer,
856
buffer_length,
857
&decrypted_buffer);
986
858
if(decrypted_buffer_size >= 0){
987
859
988
860
written = 0;
998
870
if(ret == 0 and ferror(stdout)){
999
871
int e = errno;
1000
872
if(debug){
1001
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1002
strerror(errno));
873
fprintf(stderr, "Error writing encrypted data: %s\n",
874
strerror(errno));
1003
875
}
1004
876
errno = e;
1005
877
goto mandos_end;
1024
896
if(e == 0){
1025
897
e = errno;
1026
898
}
1027
perror_plus("close");
899
perror("close");
1028
900
}
1029
901
gnutls_deinit(session);
1030
errno = e;
1031
902
if(quit_now){
1032
errno = EINTR;
903
e = EINTR;
1033
904
retval = -1;
1034
905
}
906
errno = e;
1035
907
}
1036
908
return retval;
1037
909
}
1049
921
AVAHI_GCC_UNUSED AvahiStringList *txt,
1050
922
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1051
923
flags,
1052
void* mc){
1053
if(r == NULL){
1054
return;
1055
}
924
AVAHI_GCC_UNUSED void* userdata){
925
assert(r);
1056
926
1057
927
/* Called whenever a service has been resolved successfully or
1058
928
timed out */
1064
934
switch(event){
1065
935
default:
1066
936
case AVAHI_RESOLVER_FAILURE:
1067
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1068
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1069
domain,
1070
avahi_strerror(avahi_server_errno
1071
(((mandos_context*)mc)->server)));
937
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
938
" of type '%s' in domain '%s': %s\n", name, type, domain,
939
avahi_strerror(avahi_server_errno(mc.server)));
1072
940
break;
1073
941
1074
942
case AVAHI_RESOLVER_FOUND:
1076
944
char ip[AVAHI_ADDRESS_STR_MAX];
1077
945
avahi_address_snprint(ip, sizeof(ip), address);
1078
946
if(debug){
1079
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1080
PRIdMAX ") on port %" PRIu16 "\n", name,
1081
host_name, ip, (intmax_t)interface, port);
947
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
948
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
949
ip, (intmax_t)interface, port);
1082
950
}
1083
int ret = start_mandos_communication(ip, (in_port_t)port,
1084
interface,
1085
avahi_proto_to_af(proto),
1086
mc);
951
int ret = start_mandos_communication(ip, port, interface,
952
avahi_proto_to_af(proto));
1087
953
if(ret == 0){
1088
avahi_simple_poll_quit(simple_poll);
1089
} else {
1090
if(not add_server(ip, (in_port_t)port, interface,
1091
avahi_proto_to_af(proto),
1092
&((mandos_context*)mc)->current_server)){
1093
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1094
" list\n", name);
1095
}
954
avahi_simple_poll_quit(mc.simple_poll);
1096
955
}
1097
956
}
1098
957
}
1108
967
const char *domain,
1109
968
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1110
969
flags,
1111
void* mc){
1112
if(b == NULL){
1113
return;
1114
}
970
AVAHI_GCC_UNUSED void* userdata){
971
assert(b);
1115
972
1116
973
/* Called whenever a new services becomes available on the LAN or
1117
974
is removed from the LAN */
1124
981
default:
1125
982
case AVAHI_BROWSER_FAILURE:
1126
983
1127
fprintf_plus(stderr, "(Avahi browser) %s\n",
1128
avahi_strerror(avahi_server_errno
1129
(((mandos_context*)mc)->server)));
1130
avahi_simple_poll_quit(simple_poll);
984
fprintf(stderr, "(Avahi browser) %s\n",
985
avahi_strerror(avahi_server_errno(mc.server)));
986
avahi_simple_poll_quit(mc.simple_poll);
1131
987
return;
1132
988
1133
989
case AVAHI_BROWSER_NEW:
1136
992
the callback function is called the Avahi server will free the
1137
993
resolver for us. */
1138
994
1139
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1140
interface, protocol, name, type,
1141
domain, protocol, 0,
1142
resolve_callback, mc) == NULL)
1143
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1144
" %s\n", name,
1145
avahi_strerror(avahi_server_errno
1146
(((mandos_context*)mc)->server)));
995
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
996
name, type, domain, protocol, 0,
997
resolve_callback, NULL) == NULL)
998
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
999
name, avahi_strerror(avahi_server_errno(mc.server)));
1147
1000
break;
1148
1001
1149
1002
case AVAHI_BROWSER_REMOVE:
1152
1005
case AVAHI_BROWSER_ALL_FOR_NOW:
1153
1006
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1154
1007
if(debug){
1155
fprintf_plus(stderr, "No Mandos server found, still"
1156
" searching...\n");
1008
fprintf(stderr, "No Mandos server found, still searching...\n");
1157
1009
}
1158
1010
break;
1159
1011
}
1160
1012
}
1161
1013
1162
/* Signal handler that stops main loop after SIGTERM */
1014
/* stop main loop after sigterm has been called */
1163
1015
static void handle_sigterm(int sig){
1164
1016
if(quit_now){
1165
1017
return;
1167
1019
quit_now = 1;
1168
1020
signal_received = sig;
1169
1021
int old_errno = errno;
1170
/* set main loop to exit */
1171
if(simple_poll != NULL){
1172
avahi_simple_poll_quit(simple_poll);
1022
if(mc.simple_poll != NULL){
1023
avahi_simple_poll_quit(mc.simple_poll);
1173
1024
}
1174
1025
errno = old_errno;
1175
1026
}
1176
1027
1177
bool get_flags(const char *ifname, struct ifreq *ifr){
1178
int ret;
1179
error_t ret_errno;
1180
1181
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1182
if(s < 0){
1183
ret_errno = errno;
1184
perror_plus("socket");
1185
errno = ret_errno;
1186
return false;
1187
}
1188
strcpy(ifr->ifr_name, ifname);
1189
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1190
if(ret == -1){
1028
/*
1029
* This function determines if a directory entry in /sys/class/net
1030
* corresponds to an acceptable network device.
1031
* (This function is passed to scandir(3) as a filter function.)
1032
*/
1033
int good_interface(const struct dirent *if_entry){
1034
ssize_t ssret;
1035
char *flagname = NULL;
1036
if(if_entry->d_name[0] == '.'){
1037
return 0;
1038
}
1039
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1040
if_entry->d_name);
1041
if(ret < 0){
1042
perror("asprintf");
1043
return 0;
1044
}
1045
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1046
if(flags_fd == -1){
1047
perror("open");
1048
free(flagname);
1049
return 0;
1050
}
1051
free(flagname);
1052
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1053
/* read line from flags_fd */
1054
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1055
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1056
flagstring[(size_t)to_read] = '\0';
1057
if(flagstring == NULL){
1058
perror("malloc");
1059
close(flags_fd);
1060
return 0;
1061
}
1062
while(to_read > 0){
1063
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1064
(size_t)to_read));
1065
if(ssret == -1){
1066
perror("read");
1067
free(flagstring);
1068
close(flags_fd);
1069
return 0;
1070
}
1071
to_read -= ssret;
1072
if(ssret == 0){
1073
break;
1074
}
1075
}
1076
close(flags_fd);
1077
intmax_t tmpmax;
1078
char *tmp;
1079
errno = 0;
1080
tmpmax = strtoimax(flagstring, &tmp, 0);
1081
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1082
and not (isspace(*tmp)))
1083
or tmpmax != (ifreq_flags)tmpmax){
1191
1084
if(debug){
1192
ret_errno = errno;
1193
perror_plus("ioctl SIOCGIFFLAGS");
1194
errno = ret_errno;
1085
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1086
flagstring, if_entry->d_name);
1195
1087
}
1196
return false;
1088
free(flagstring);
1089
return 0;
1197
1090
}
1198
return true;
1199
}
1200
1201
bool good_flags(const char *ifname, const struct ifreq *ifr){
1202
1091
free(flagstring);
1092
ifreq_flags flags = (ifreq_flags)tmpmax;
1203
1093
/* Reject the loopback device */
1204
if(ifr->ifr_flags & IFF_LOOPBACK){
1094
if(flags & IFF_LOOPBACK){
1205
1095
if(debug){
1206
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1207
ifname);
1096
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1097
if_entry->d_name);
1208
1098
}
1209
return false;
1099
return 0;
1210
1100
}
1211
1101
/* Accept point-to-point devices only if connect_to is specified */
1212
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1102
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1213
1103
if(debug){
1214
fprintf_plus(stderr, "Accepting point-to-point interface"
1215
" \"%s\"\n", ifname);
1104
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1105
if_entry->d_name);
1216
1106
}
1217
return true;
1107
return 1;
1218
1108
}
1219
1109
/* Otherwise, reject non-broadcast-capable devices */
1220
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1110
if(not (flags & IFF_BROADCAST)){
1221
1111
if(debug){
1222
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1223
" \"%s\"\n", ifname);
1112
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1113
if_entry->d_name);
1224
1114
}
1225
return false;
1115
return 0;
1226
1116
}
1227
1117
/* Reject non-ARP interfaces (including dummy interfaces) */
1228
if(ifr->ifr_flags & IFF_NOARP){
1118
if(flags & IFF_NOARP){
1229
1119
if(debug){
1230
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1231
ifname);
1120
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1121
if_entry->d_name);
1232
1122
}
1233
return false;
1123
return 0;
1234
1124
}
1235
1236
1125
/* Accept this device */
1237
1126
if(debug){
1238
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1239
}
1240
return true;
1241
}
1242
1243
/*
1244
* This function determines if a directory entry in /sys/class/net
1245
* corresponds to an acceptable network device.
1246
* (This function is passed to scandir(3) as a filter function.)
1247
*/
1248
int good_interface(const struct dirent *if_entry){
1249
if(if_entry->d_name[0] == '.'){
1250
return 0;
1251
}
1252
1253
struct ifreq ifr;
1254
if(not get_flags(if_entry->d_name, &ifr)){
1255
if(debug){
1256
fprintf_plus(stderr, "Failed to get flags for interface "
1257
"\"%s\"\n", if_entry->d_name);
1258
}
1259
return 0;
1260
}
1261
1262
if(not good_flags(if_entry->d_name, &ifr)){
1263
return 0;
1127
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1128
if_entry->d_name);
1264
1129
}
1265
1130
return 1;
1266
1131
}
1267
1132
1268
/*
1269
* This function determines if a network interface is up.
1270
*/
1271
bool interface_is_up(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_UP);
1282
}
1283
1284
/*
1285
* This function determines if a network interface is running
1286
*/
1287
bool interface_is_running(const char *interface){
1288
struct ifreq ifr;
1289
if(not get_flags(interface, &ifr)){
1290
if(debug){
1291
fprintf_plus(stderr, "Failed to get flags for interface "
1292
"\"%s\"\n", interface);
1293
}
1294
return false;
1295
}
1296
1297
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1298
}
1299
1300
1133
int notdotentries(const struct dirent *direntry){
1301
1134
/* Skip "." and ".." */
1302
1135
if(direntry->d_name[0] == '.'
1308
1141
return 1;
1309
1142
}
1310
1143
1311
/* Is this directory entry a runnable program? */
1312
int runnable_hook(const struct dirent *direntry){
1313
int ret;
1314
size_t sret;
1315
struct stat st;
1316
1317
if((direntry->d_name)[0] == '\0'){
1318
/* Empty name? */
1319
return 0;
1320
}
1321
1322
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1323
"abcdefghijklmnopqrstuvwxyz"
1324
"0123456789"
1325
"_-");
1326
if((direntry->d_name)[sret] != '\0'){
1327
/* Contains non-allowed characters */
1328
if(debug){
1329
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1330
direntry->d_name);
1331
}
1332
return 0;
1333
}
1334
1335
char *fullname = NULL;
1336
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1337
if(ret < 0){
1338
perror_plus("asprintf");
1339
return 0;
1340
}
1341
1342
ret = stat(fullname, &st);
1343
if(ret == -1){
1344
if(debug){
1345
perror_plus("Could not stat hook");
1346
}
1347
return 0;
1348
}
1349
if(not (S_ISREG(st.st_mode))){
1350
/* Not a regular file */
1351
if(debug){
1352
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1353
direntry->d_name);
1354
}
1355
return 0;
1356
}
1357
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1358
/* Not executable */
1359
if(debug){
1360
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1361
direntry->d_name);
1362
}
1363
return 0;
1364
}
1365
if(debug){
1366
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1367
direntry->d_name);
1368
}
1369
return 1;
1370
}
1371
1372
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1373
mandos_context *mc){
1374
int ret;
1375
struct timespec now;
1376
struct timespec waited_time;
1377
intmax_t block_time;
1378
1379
while(true){
1380
if(mc->current_server == NULL){
1381
if (debug){
1382
fprintf_plus(stderr, "Wait until first server is found."
1383
" No timeout!\n");
1384
}
1385
ret = avahi_simple_poll_iterate(s, -1);
1386
} else {
1387
if (debug){
1388
fprintf_plus(stderr, "Check current_server if we should run"
1389
" it, or wait\n");
1390
}
1391
/* the current time */
1392
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1393
if(ret == -1){
1394
perror_plus("clock_gettime");
1395
return -1;
1396
}
1397
/* Calculating in ms how long time between now and server
1398
who we visted longest time ago. Now - last seen. */
1399
waited_time.tv_sec = (now.tv_sec
1400
- mc->current_server->last_seen.tv_sec);
1401
waited_time.tv_nsec = (now.tv_nsec
1402
- mc->current_server->last_seen.tv_nsec);
1403
/* total time is 10s/10,000ms.
1404
Converting to s from ms by dividing by 1,000,
1405
and ns to ms by dividing by 1,000,000. */
1406
block_time = ((retry_interval
1407
- ((intmax_t)waited_time.tv_sec * 1000))
1408
- ((intmax_t)waited_time.tv_nsec / 1000000));
1409
1410
if (debug){
1411
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1412
block_time);
1413
}
1414
1415
if(block_time <= 0){
1416
ret = start_mandos_communication(mc->current_server->ip,
1417
mc->current_server->port,
1418
mc->current_server->if_index,
1419
mc->current_server->af, mc);
1420
if(ret == 0){
1421
avahi_simple_poll_quit(s);
1422
return 0;
1423
}
1424
ret = clock_gettime(CLOCK_MONOTONIC,
1425
&mc->current_server->last_seen);
1426
if(ret == -1){
1427
perror_plus("clock_gettime");
1428
return -1;
1429
}
1430
mc->current_server = mc->current_server->next;
1431
block_time = 0; /* Call avahi to find new Mandos
1432
servers, but don't block */
1433
}
1434
1435
ret = avahi_simple_poll_iterate(s, (int)block_time);
1436
}
1437
if(ret != 0){
1438
if (ret > 0 or errno != EINTR){
1439
return (ret != 1) ? ret : 0;
1440
}
1441
}
1442
}
1443
}
1444
1445
/* Set effective uid to 0, return errno */
1446
error_t raise_privileges(void){
1447
error_t old_errno = errno;
1448
error_t ret_errno = 0;
1449
if(seteuid(0) == -1){
1450
ret_errno = errno;
1451
perror_plus("seteuid");
1452
}
1453
errno = old_errno;
1454
return ret_errno;
1455
}
1456
1457
/* Set effective and real user ID to 0. Return errno. */
1458
error_t raise_privileges_permanently(void){
1459
error_t old_errno = errno;
1460
error_t ret_errno = raise_privileges();
1461
if(ret_errno != 0){
1462
errno = old_errno;
1463
return ret_errno;
1464
}
1465
if(setuid(0) == -1){
1466
ret_errno = errno;
1467
perror_plus("seteuid");
1468
}
1469
errno = old_errno;
1470
return ret_errno;
1471
}
1472
1473
/* Set effective user ID to unprivileged saved user ID */
1474
error_t lower_privileges(void){
1475
error_t old_errno = errno;
1476
error_t ret_errno = 0;
1477
if(seteuid(uid) == -1){
1478
ret_errno = errno;
1479
perror_plus("seteuid");
1480
}
1481
errno = old_errno;
1482
return ret_errno;
1483
}
1484
1485
/* Lower privileges permanently */
1486
error_t lower_privileges_permanently(void){
1487
error_t old_errno = errno;
1488
error_t ret_errno = 0;
1489
if(setuid(uid) == -1){
1490
ret_errno = errno;
1491
perror_plus("setuid");
1492
}
1493
errno = old_errno;
1494
return ret_errno;
1495
}
1496
1497
bool run_network_hooks(const char *mode, const char *interface,
1498
const float delay){
1499
struct dirent **direntries;
1500
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1501
alphasort);
1502
if(numhooks == -1){
1503
if(errno == ENOENT){
1504
if(debug){
1505
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1506
" found\n", hookdir);
1507
}
1508
} else {
1509
perror_plus("scandir");
1510
}
1511
} else {
1512
struct dirent *direntry;
1513
int ret;
1514
int devnull = open("/dev/null", O_RDONLY);
1515
for(int i = 0; i < numhooks; i++){
1516
direntry = direntries[i];
1517
char *fullname = NULL;
1518
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1519
if(ret < 0){
1520
perror_plus("asprintf");
1521
continue;
1522
}
1523
if(debug){
1524
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1525
direntry->d_name);
1526
}
1527
pid_t hook_pid = fork();
1528
if(hook_pid == 0){
1529
/* Child */
1530
/* Raise privileges */
1531
raise_privileges_permanently();
1532
/* Set group */
1533
errno = 0;
1534
ret = setgid(0);
1535
if(ret == -1){
1536
perror_plus("setgid");
1537
}
1538
/* Reset supplementary groups */
1539
errno = 0;
1540
ret = setgroups(0, NULL);
1541
if(ret == -1){
1542
perror_plus("setgroups");
1543
}
1544
dup2(devnull, STDIN_FILENO);
1545
close(devnull);
1546
dup2(STDERR_FILENO, STDOUT_FILENO);
1547
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1548
if(ret == -1){
1549
perror_plus("setenv");
1550
_exit(EX_OSERR);
1551
}
1552
ret = setenv("DEVICE", interface, 1);
1553
if(ret == -1){
1554
perror_plus("setenv");
1555
_exit(EX_OSERR);
1556
}
1557
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1558
if(ret == -1){
1559
perror_plus("setenv");
1560
_exit(EX_OSERR);
1561
}
1562
ret = setenv("MODE", mode, 1);
1563
if(ret == -1){
1564
perror_plus("setenv");
1565
_exit(EX_OSERR);
1566
}
1567
char *delaystring;
1568
ret = asprintf(&delaystring, "%f", delay);
1569
if(ret == -1){
1570
perror_plus("asprintf");
1571
_exit(EX_OSERR);
1572
}
1573
ret = setenv("DELAY", delaystring, 1);
1574
if(ret == -1){
1575
free(delaystring);
1576
perror_plus("setenv");
1577
_exit(EX_OSERR);
1578
}
1579
free(delaystring);
1580
if(connect_to != NULL){
1581
ret = setenv("CONNECT", connect_to, 1);
1582
if(ret == -1){
1583
perror_plus("setenv");
1584
_exit(EX_OSERR);
1585
}
1586
}
1587
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1588
perror_plus("execl");
1589
_exit(EXIT_FAILURE);
1590
}
1591
} else {
1592
int status;
1593
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1594
perror_plus("waitpid");
1595
free(fullname);
1596
continue;
1597
}
1598
if(WIFEXITED(status)){
1599
if(WEXITSTATUS(status) != 0){
1600
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1601
" with status %d\n", direntry->d_name,
1602
WEXITSTATUS(status));
1603
free(fullname);
1604
continue;
1605
}
1606
} else if(WIFSIGNALED(status)){
1607
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1608
" signal %d\n", direntry->d_name,
1609
WTERMSIG(status));
1610
free(fullname);
1611
continue;
1612
} else {
1613
fprintf_plus(stderr, "Warning: network hook \"%s\""
1614
" crashed\n", direntry->d_name);
1615
free(fullname);
1616
continue;
1617
}
1618
}
1619
free(fullname);
1620
if(debug){
1621
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1622
direntry->d_name);
1623
}
1624
}
1625
close(devnull);
1626
}
1627
return true;
1628
}
1629
1630
error_t bring_up_interface(const char *const interface,
1631
const float delay){
1632
int sd = -1;
1633
error_t old_errno = errno;
1634
error_t ret_errno = 0;
1635
int ret, ret_setflags;
1636
struct ifreq network;
1637
unsigned int if_index = if_nametoindex(interface);
1638
if(if_index == 0){
1639
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1640
errno = old_errno;
1641
return ENXIO;
1642
}
1643
1644
if(quit_now){
1645
errno = old_errno;
1646
return EINTR;
1647
}
1648
1649
if(not interface_is_up(interface)){
1650
if(not get_flags(interface, &network) and debug){
1651
ret_errno = errno;
1652
fprintf_plus(stderr, "Failed to get flags for interface "
1653
"\"%s\"\n", interface);
1654
return ret_errno;
1655
}
1656
network.ifr_flags |= IFF_UP;
1657
1658
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1659
if(sd < 0){
1660
ret_errno = errno;
1661
perror_plus("socket");
1662
errno = old_errno;
1663
return ret_errno;
1664
}
1665
1666
if(quit_now){
1667
close(sd);
1668
errno = old_errno;
1669
return EINTR;
1670
}
1671
1672
if(debug){
1673
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1674
interface);
1675
}
1676
1677
/* Raise priviliges */
1678
raise_privileges();
1679
1680
#ifdef __linux__
1681
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1682
messages about the network interface to mess up the prompt */
1683
int ret_linux = klogctl(8, NULL, 5);
1684
bool restore_loglevel = true;
1685
if(ret_linux == -1){
1686
restore_loglevel = false;
1687
perror_plus("klogctl");
1688
}
1689
#endif /* __linux__ */
1690
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1691
ret_errno = errno;
1692
#ifdef __linux__
1693
if(restore_loglevel){
1694
ret_linux = klogctl(7, NULL, 0);
1695
if(ret_linux == -1){
1696
perror_plus("klogctl");
1697
}
1698
}
1699
#endif /* __linux__ */
1700
1701
/* Lower privileges */
1702
lower_privileges();
1703
1704
/* Close the socket */
1705
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1706
if(ret == -1){
1707
perror_plus("close");
1708
}
1709
1710
if(ret_setflags == -1){
1711
errno = ret_errno;
1712
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1713
errno = old_errno;
1714
return ret_errno;
1715
}
1716
} else if(debug){
1717
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1718
interface);
1719
}
1720
1721
/* Sleep checking until interface is running.
1722
Check every 0.25s, up to total time of delay */
1723
for(int i=0; i < delay * 4; i++){
1724
if(interface_is_running(interface)){
1725
break;
1726
}
1727
struct timespec sleeptime = { .tv_nsec = 250000000 };
1728
ret = nanosleep(&sleeptime, NULL);
1729
if(ret == -1 and errno != EINTR){
1730
perror_plus("nanosleep");
1731
}
1732
}
1733
1734
errno = old_errno;
1735
return 0;
1736
}
1737
1738
error_t take_down_interface(const char *const interface){
1739
error_t old_errno = errno;
1740
struct ifreq network;
1741
unsigned int if_index = if_nametoindex(interface);
1742
if(if_index == 0){
1743
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1744
errno = old_errno;
1745
return ENXIO;
1746
}
1747
if(interface_is_up(interface)){
1748
error_t ret_errno = 0;
1749
if(not get_flags(interface, &network) and debug){
1750
ret_errno = errno;
1751
fprintf_plus(stderr, "Failed to get flags for interface "
1752
"\"%s\"\n", interface);
1753
return ret_errno;
1754
}
1755
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1756
1757
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1758
if(sd < 0){
1759
ret_errno = errno;
1760
perror_plus("socket");
1761
errno = old_errno;
1762
return ret_errno;
1763
}
1764
1765
if(debug){
1766
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1767
interface);
1768
}
1769
1770
/* Raise priviliges */
1771
raise_privileges();
1772
1773
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1774
ret_errno = errno;
1775
1776
/* Lower privileges */
1777
lower_privileges();
1778
1779
/* Close the socket */
1780
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1781
if(ret == -1){
1782
perror_plus("close");
1783
}
1784
1785
if(ret_setflags == -1){
1786
errno = ret_errno;
1787
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1788
errno = old_errno;
1789
return ret_errno;
1790
}
1791
} else if(debug){
1792
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1793
interface);
1794
}
1795
1796
errno = old_errno;
1797
return 0;
1798
}
1799
1800
1144
int main(int argc, char *argv[]){
1801
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1802
.priority = "SECURE256:!CTYPE-X.509:"
1803
"+CTYPE-OPENPGP", .current_server = NULL,
1804
.interfaces = NULL, .interfaces_size = 0 };
1805
1145
AvahiSServiceBrowser *sb = NULL;
1806
error_t ret_errno;
1146
int error;
1807
1147
int ret;
1808
1148
intmax_t tmpmax;
1809
1149
char *tmp;
1810
1150
int exitcode = EXIT_SUCCESS;
1811
char *interfaces_to_take_down = NULL;
1812
size_t interfaces_to_take_down_size = 0;
1151
const char *interface = "";
1152
struct ifreq network;
1153
int sd = -1;
1154
bool take_down_interface = false;
1155
uid_t uid;
1156
gid_t gid;
1813
1157
char tempdir[] = "/tmp/mandosXXXXXX";
1814
1158
bool tempdir_created = false;
1815
1159
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1816
1160
const char *seckey = PATHDIR "/" SECKEY;
1817
1161
const char *pubkey = PATHDIR "/" PUBKEY;
1818
char *interfaces_hooks = NULL;
1819
1162
1820
1163
bool gnutls_initialized = false;
1821
1164
bool gpgme_initialized = false;
1822
1165
float delay = 2.5f;
1823
double retry_interval = 10; /* 10s between trying a server and
1824
retrying the same server again */
1825
1166
1826
1167
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1827
1168
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1833
1174
errno = 0;
1834
1175
ret = setgid(gid);
1835
1176
if(ret == -1){
1836
perror_plus("setgid");
1177
perror("setgid");
1837
1178
}
1838
1179
1839
1180
/* Lower user privileges (temporarily) */
1840
1181
errno = 0;
1841
1182
ret = seteuid(uid);
1842
1183
if(ret == -1){
1843
perror_plus("seteuid");
1184
perror("seteuid");
1844
1185
}
1845
1186
1846
1187
if(quit_now){
1881
1222
.arg = "SECONDS",
1882
1223
.doc = "Maximum delay to wait for interface startup",
1883
1224
.group = 2 },
1884
{ .name = "retry", .key = 132,
1885
.arg = "SECONDS",
1886
.doc = "Retry interval used when denied by the Mandos server",
1887
.group = 2 },
1888
{ .name = "network-hook-dir", .key = 133,
1889
.arg = "DIR",
1890
.doc = "Directory where network hooks are located",
1891
.group = 2 },
1892
1225
/*
1893
1226
* These reproduce what we would get without ARGP_NO_HELP
1894
1227
*/
1912
1245
connect_to = arg;
1913
1246
break;
1914
1247
case 'i': /* --interface */
1915
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1916
arg, (int)',');
1917
if(ret_errno != 0){
1918
argp_error(state, "%s", strerror(ret_errno));
1919
}
1248
interface = arg;
1920
1249
break;
1921
1250
case 's': /* --seckey */
1922
1251
seckey = arg;
1942
1271
if(errno != 0 or tmp == arg or *tmp != '\0'){
1943
1272
argp_error(state, "Bad delay");
1944
1273
}
1945
case 132: /* --retry */
1946
errno = 0;
1947
retry_interval = strtod(arg, &tmp);
1948
if(errno != 0 or tmp == arg or *tmp != '\0'
1949
or (retry_interval * 1000) > INT_MAX
1950
or retry_interval < 0){
1951
argp_error(state, "Bad retry interval");
1952
}
1953
break;
1954
case 133: /* --network-hook-dir */
1955
hookdir = arg;
1956
1274
break;
1957
1275
/*
1958
1276
* These reproduce what we would get without ARGP_NO_HELP
1965
1283
argp_state_help(state, state->out_stream,
1966
1284
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1967
1285
case 'V': /* --version */
1968
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1286
fprintf(state->out_stream, "%s\n", argp_program_version);
1969
1287
exit(argp_err_exit_status);
1970
1288
break;
1971
1289
default:
1986
1304
case ENOMEM:
1987
1305
default:
1988
1306
errno = ret;
1989
perror_plus("argp_parse");
1307
perror("argp_parse");
1990
1308
exitcode = EX_OSERR;
1991
1309
goto end;
1992
1310
case EINVAL:
1994
1312
goto end;
1995
1313
}
1996
1314
}
1997
1998
{
1999
/* Work around Debian bug #633582:
2000
<http://bugs.debian.org/633582> */
2001
2002
/* Re-raise priviliges */
2003
if(raise_privileges() == 0){
2004
struct stat st;
2005
2006
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2007
int seckey_fd = open(seckey, O_RDONLY);
2008
if(seckey_fd == -1){
2009
perror_plus("open");
2010
} else {
2011
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2012
if(ret == -1){
2013
perror_plus("fstat");
2014
} else {
2015
if(S_ISREG(st.st_mode)
2016
and st.st_uid == 0 and st.st_gid == 0){
2017
ret = fchown(seckey_fd, uid, gid);
2018
if(ret == -1){
2019
perror_plus("fchown");
2020
}
2021
}
2022
}
2023
TEMP_FAILURE_RETRY(close(seckey_fd));
2024
}
2025
}
2026
2027
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2028
int pubkey_fd = open(pubkey, O_RDONLY);
2029
if(pubkey_fd == -1){
2030
perror_plus("open");
2031
} else {
2032
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2033
if(ret == -1){
2034
perror_plus("fstat");
2035
} else {
2036
if(S_ISREG(st.st_mode)
2037
and st.st_uid == 0 and st.st_gid == 0){
2038
ret = fchown(pubkey_fd, uid, gid);
2039
if(ret == -1){
2040
perror_plus("fchown");
2041
}
2042
}
2043
}
2044
TEMP_FAILURE_RETRY(close(pubkey_fd));
2045
}
2046
}
2047
2048
/* Lower privileges */
2049
lower_privileges();
2050
}
2051
}
2052
2053
/* Remove invalid interface names (except "none") */
2054
{
2055
char *interface = NULL;
2056
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2057
interface))){
2058
if(strcmp(interface, "none") != 0
2059
and if_nametoindex(interface) == 0){
2060
if(interface[0] != '\0'){
2061
fprintf_plus(stderr, "Not using nonexisting interface"
2062
" \"%s\"\n", interface);
2063
}
2064
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2065
interface = NULL;
2066
}
2067
}
2068
}
2069
2070
/* Run network hooks */
2071
{
2072
if(mc.interfaces != NULL){
2073
interfaces_hooks = malloc(mc.interfaces_size);
2074
if(interfaces_hooks == NULL){
2075
perror_plus("malloc");
2076
goto end;
2077
}
2078
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2079
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2080
}
2081
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2082
interfaces_hooks : "", delay)){
2083
goto end;
2084
}
2085
}
2086
1315
2087
1316
if(not debug){
2088
1317
avahi_set_log_function(empty_log);
2089
1318
}
1319
1320
if(interface[0] == '\0'){
1321
struct dirent **direntries;
1322
ret = scandir(sys_class_net, &direntries, good_interface,
1323
alphasort);
1324
if(ret >= 1){
1325
/* Pick the first good interface */
1326
interface = strdup(direntries[0]->d_name);
1327
if(debug){
1328
fprintf(stderr, "Using interface \"%s\"\n", interface);
1329
}
1330
if(interface == NULL){
1331
perror("malloc");
1332
free(direntries);
1333
exitcode = EXIT_FAILURE;
1334
goto end;
1335
}
1336
free(direntries);
1337
} else {
1338
free(direntries);
1339
fprintf(stderr, "Could not find a network interface\n");
1340
exitcode = EXIT_FAILURE;
1341
goto end;
1342
}
1343
}
2090
1344
2091
1345
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2092
1346
from the signal handler */
2093
1347
/* Initialize the pseudo-RNG for Avahi */
2094
1348
srand((unsigned int) time(NULL));
2095
simple_poll = avahi_simple_poll_new();
2096
if(simple_poll == NULL){
2097
fprintf_plus(stderr,
2098
"Avahi: Failed to create simple poll object.\n");
1349
mc.simple_poll = avahi_simple_poll_new();
1350
if(mc.simple_poll == NULL){
1351
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2099
1352
exitcode = EX_UNAVAILABLE;
2100
1353
goto end;
2101
1354
}
2103
1356
sigemptyset(&sigterm_action.sa_mask);
2104
1357
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2105
1358
if(ret == -1){
2106
perror_plus("sigaddset");
1359
perror("sigaddset");
2107
1360
exitcode = EX_OSERR;
2108
1361
goto end;
2109
1362
}
2110
1363
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2111
1364
if(ret == -1){
2112
perror_plus("sigaddset");
1365
perror("sigaddset");
2113
1366
exitcode = EX_OSERR;
2114
1367
goto end;
2115
1368
}
2116
1369
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2117
1370
if(ret == -1){
2118
perror_plus("sigaddset");
1371
perror("sigaddset");
2119
1372
exitcode = EX_OSERR;
2120
1373
goto end;
2121
1374
}
2125
1378
*/
2126
1379
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2127
1380
if(ret == -1){
2128
perror_plus("sigaction");
1381
perror("sigaction");
2129
1382
return EX_OSERR;
2130
1383
}
2131
1384
if(old_sigterm_action.sa_handler != SIG_IGN){
2132
1385
ret = sigaction(SIGINT, &sigterm_action, NULL);
2133
1386
if(ret == -1){
2134
perror_plus("sigaction");
1387
perror("sigaction");
2135
1388
exitcode = EX_OSERR;
2136
1389
goto end;
2137
1390
}
2138
1391
}
2139
1392
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2140
1393
if(ret == -1){
2141
perror_plus("sigaction");
1394
perror("sigaction");
2142
1395
return EX_OSERR;
2143
1396
}
2144
1397
if(old_sigterm_action.sa_handler != SIG_IGN){
2145
1398
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2146
1399
if(ret == -1){
2147
perror_plus("sigaction");
1400
perror("sigaction");
2148
1401
exitcode = EX_OSERR;
2149
1402
goto end;
2150
1403
}
2151
1404
}
2152
1405
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2153
1406
if(ret == -1){
2154
perror_plus("sigaction");
1407
perror("sigaction");
2155
1408
return EX_OSERR;
2156
1409
}
2157
1410
if(old_sigterm_action.sa_handler != SIG_IGN){
2158
1411
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2159
1412
if(ret == -1){
2160
perror_plus("sigaction");
1413
perror("sigaction");
2161
1414
exitcode = EX_OSERR;
2162
1415
goto end;
2163
1416
}
2164
1417
}
2165
1418
2166
/* If no interfaces were specified, make a list */
2167
if(mc.interfaces == NULL){
2168
struct dirent **direntries;
2169
/* Look for any good interfaces */
2170
ret = scandir(sys_class_net, &direntries, good_interface,
2171
alphasort);
2172
if(ret >= 1){
2173
/* Add all found interfaces to interfaces list */
2174
for(int i = 0; i < ret; ++i){
2175
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2176
direntries[i]->d_name);
2177
if(ret_errno != 0){
2178
errno = ret_errno;
2179
perror_plus("argz_add");
2180
continue;
2181
}
2182
if(debug){
2183
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2184
direntries[i]->d_name);
2185
}
2186
}
2187
free(direntries);
1419
/* If the interface is down, bring it up */
1420
if(strcmp(interface, "none") != 0){
1421
if_index = (AvahiIfIndex) if_nametoindex(interface);
1422
if(if_index == 0){
1423
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1424
exitcode = EX_UNAVAILABLE;
1425
goto end;
1426
}
1427
1428
if(quit_now){
1429
goto end;
1430
}
1431
1432
/* Re-raise priviliges */
1433
errno = 0;
1434
ret = seteuid(0);
1435
if(ret == -1){
1436
perror("seteuid");
1437
}
1438
1439
#ifdef __linux__
1440
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1441
messages about the network interface to mess up the prompt */
1442
ret = klogctl(8, NULL, 5);
1443
bool restore_loglevel = true;
1444
if(ret == -1){
1445
restore_loglevel = false;
1446
perror("klogctl");
1447
}
1448
#endif /* __linux__ */
1449
1450
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1451
if(sd < 0){
1452
perror("socket");
1453
exitcode = EX_OSERR;
1454
#ifdef __linux__
1455
if(restore_loglevel){
1456
ret = klogctl(7, NULL, 0);
1457
if(ret == -1){
1458
perror("klogctl");
1459
}
1460
}
1461
#endif /* __linux__ */
1462
/* Lower privileges */
1463
errno = 0;
1464
ret = seteuid(uid);
1465
if(ret == -1){
1466
perror("seteuid");
1467
}
1468
goto end;
1469
}
1470
strcpy(network.ifr_name, interface);
1471
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1472
if(ret == -1){
1473
perror("ioctl SIOCGIFFLAGS");
1474
#ifdef __linux__
1475
if(restore_loglevel){
1476
ret = klogctl(7, NULL, 0);
1477
if(ret == -1){
1478
perror("klogctl");
1479
}
1480
}
1481
#endif /* __linux__ */
1482
exitcode = EX_OSERR;
1483
/* Lower privileges */
1484
errno = 0;
1485
ret = seteuid(uid);
1486
if(ret == -1){
1487
perror("seteuid");
1488
}
1489
goto end;
1490
}
1491
if((network.ifr_flags & IFF_UP) == 0){
1492
network.ifr_flags |= IFF_UP;
1493
take_down_interface = true;
1494
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1495
if(ret == -1){
1496
take_down_interface = false;
1497
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1498
exitcode = EX_OSERR;
1499
#ifdef __linux__
1500
if(restore_loglevel){
1501
ret = klogctl(7, NULL, 0);
1502
if(ret == -1){
1503
perror("klogctl");
1504
}
1505
}
1506
#endif /* __linux__ */
1507
/* Lower privileges */
1508
errno = 0;
1509
ret = seteuid(uid);
1510
if(ret == -1){
1511
perror("seteuid");
1512
}
1513
goto end;
1514
}
1515
}
1516
/* sleep checking until interface is running */
1517
for(int i=0; i < delay * 4; i++){
1518
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1519
if(ret == -1){
1520
perror("ioctl SIOCGIFFLAGS");
1521
} else if(network.ifr_flags & IFF_RUNNING){
1522
break;
1523
}
1524
struct timespec sleeptime = { .tv_nsec = 250000000 };
1525
ret = nanosleep(&sleeptime, NULL);
1526
if(ret == -1 and errno != EINTR){
1527
perror("nanosleep");
1528
}
1529
}
1530
if(not take_down_interface){
1531
/* We won't need the socket anymore */
1532
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1533
if(ret == -1){
1534
perror("close");
1535
}
1536
}
1537
#ifdef __linux__
1538
if(restore_loglevel){
1539
/* Restores kernel loglevel to default */
1540
ret = klogctl(7, NULL, 0);
1541
if(ret == -1){
1542
perror("klogctl");
1543
}
1544
}
1545
#endif /* __linux__ */
1546
/* Lower privileges */
1547
errno = 0;
1548
if(take_down_interface){
1549
/* Lower privileges */
1550
ret = seteuid(uid);
1551
if(ret == -1){
1552
perror("seteuid");
1553
}
2188
1554
} else {
2189
free(direntries);
2190
fprintf_plus(stderr, "Could not find a network interface\n");
2191
exitcode = EXIT_FAILURE;
2192
goto end;
2193
}
2194
}
2195
2196
/* Bring up interfaces which are down, and remove any "none"s */
2197
{
2198
char *interface = NULL;
2199
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2200
interface))){
2201
/* If interface name is "none", stop bringing up interfaces.
2202
Also remove all instances of "none" from the list */
2203
if(strcmp(interface, "none") == 0){
2204
argz_delete(&mc.interfaces, &mc.interfaces_size,
2205
interface);
2206
interface = NULL;
2207
while((interface = argz_next(mc.interfaces,
2208
mc.interfaces_size, interface))){
2209
if(strcmp(interface, "none") == 0){
2210
argz_delete(&mc.interfaces, &mc.interfaces_size,
2211
interface);
2212
interface = NULL;
2213
}
2214
}
2215
break;
2216
}
2217
bool interface_was_up = interface_is_up(interface);
2218
ret = bring_up_interface(interface, delay);
2219
if(not interface_was_up){
2220
if(ret != 0){
2221
errno = ret;
2222
perror_plus("Failed to bring up interface");
2223
} else {
2224
ret_errno = argz_add(&interfaces_to_take_down,
2225
&interfaces_to_take_down_size,
2226
interface);
2227
if(ret_errno != 0){
2228
errno = ret_errno;
2229
perror_plus("argz_add");
2230
}
2231
}
2232
}
2233
}
2234
if(debug and (interfaces_to_take_down == NULL)){
2235
fprintf_plus(stderr, "No interfaces were brought up\n");
2236
}
2237
}
2238
2239
/* If we only got one interface, explicitly use only that one */
2240
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2241
if(debug){
2242
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2243
mc.interfaces);
2244
}
2245
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1555
/* Lower privileges permanently */
1556
ret = setuid(uid);
1557
if(ret == -1){
1558
perror("setuid");
1559
}
1560
}
2246
1561
}
2247
1562
2248
1563
if(quit_now){
2249
1564
goto end;
2250
1565
}
2251
1566
2252
ret = init_gnutls_global(pubkey, seckey, &mc);
1567
ret = init_gnutls_global(pubkey, seckey);
2253
1568
if(ret == -1){
2254
fprintf_plus(stderr, "init_gnutls_global failed\n");
1569
fprintf(stderr, "init_gnutls_global failed\n");
2255
1570
exitcode = EX_UNAVAILABLE;
2256
1571
goto end;
2257
1572
} else {
2263
1578
}
2264
1579
2265
1580
if(mkdtemp(tempdir) == NULL){
2266
perror_plus("mkdtemp");
1581
perror("mkdtemp");
2267
1582
goto end;
2268
1583
}
2269
1584
tempdir_created = true;
2272
1587
goto end;
2273
1588
}
2274
1589
2275
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2276
fprintf_plus(stderr, "init_gpgme failed\n");
1590
if(not init_gpgme(pubkey, seckey, tempdir)){
1591
fprintf(stderr, "init_gpgme failed\n");
2277
1592
exitcode = EX_UNAVAILABLE;
2278
1593
goto end;
2279
1594
} else {
2288
1603
/* Connect directly, do not use Zeroconf */
2289
1604
/* (Mainly meant for debugging) */
2290
1605
char *address = strrchr(connect_to, ':');
2291
2292
1606
if(address == NULL){
2293
fprintf_plus(stderr, "No colon in address\n");
1607
fprintf(stderr, "No colon in address\n");
2294
1608
exitcode = EX_USAGE;
2295
1609
goto end;
2296
1610
}
2299
1613
goto end;
2300
1614
}
2301
1615
2302
in_port_t port;
1616
uint16_t port;
2303
1617
errno = 0;
2304
1618
tmpmax = strtoimax(address+1, &tmp, 10);
2305
1619
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2306
or tmpmax != (in_port_t)tmpmax){
2307
fprintf_plus(stderr, "Bad port number\n");
1620
or tmpmax != (uint16_t)tmpmax){
1621
fprintf(stderr, "Bad port number\n");
2308
1622
exitcode = EX_USAGE;
2309
1623
goto end;
2310
1624
}
2311
1625
2312
1626
if(quit_now){
2313
1627
goto end;
2314
1628
}
2315
1629
2316
port = (in_port_t)tmpmax;
1630
port = (uint16_t)tmpmax;
2317
1631
*address = '\0';
1632
address = connect_to;
2318
1633
/* Colon in address indicates IPv6 */
2319
1634
int af;
2320
if(strchr(connect_to, ':') != NULL){
1635
if(strchr(address, ':') != NULL){
2321
1636
af = AF_INET6;
2322
/* Accept [] around IPv6 address - see RFC 5952 */
2323
if(connect_to[0] == '[' and address[-1] == ']')
2324
{
2325
connect_to++;
2326
address[-1] = '\0';
2327
}
2328
1637
} else {
2329
1638
af = AF_INET;
2330
1639
}
2331
address = connect_to;
2332
1640
2333
1641
if(quit_now){
2334
1642
goto end;
2335
1643
}
2336
1644
2337
1645
while(not quit_now){
2338
ret = start_mandos_communication(address, port, if_index, af,
2339
&mc);
1646
ret = start_mandos_communication(address, port, if_index, af);
2340
1647
if(quit_now or ret == 0){
2341
1648
break;
2342
1649
}
2343
if(debug){
2344
fprintf_plus(stderr, "Retrying in %d seconds\n",
2345
(int)retry_interval);
2346
}
2347
sleep((unsigned int)retry_interval);
2348
}
2349
1650
sleep(15);
1651
};
1652
2350
1653
if (not quit_now){
2351
1654
exitcode = EXIT_SUCCESS;
2352
1655
}
2353
1656
2354
1657
goto end;
2355
1658
}
2356
1659
2368
1671
config.publish_domain = 0;
2369
1672
2370
1673
/* Allocate a new server */
2371
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2372
&config, NULL, NULL, &ret_errno);
1674
mc.server = avahi_server_new(avahi_simple_poll_get
1675
(mc.simple_poll), &config, NULL,
1676
NULL, &error);
2373
1677
2374
1678
/* Free the Avahi configuration data */
2375
1679
avahi_server_config_free(&config);
2377
1681
2378
1682
/* Check if creating the Avahi server object succeeded */
2379
1683
if(mc.server == NULL){
2380
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2381
avahi_strerror(ret_errno));
1684
fprintf(stderr, "Failed to create Avahi server: %s\n",
1685
avahi_strerror(error));
2382
1686
exitcode = EX_UNAVAILABLE;
2383
1687
goto end;
2384
1688
}
2390
1694
/* Create the Avahi service browser */
2391
1695
sb = avahi_s_service_browser_new(mc.server, if_index,
2392
1696
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2393
NULL, 0, browse_callback,
2394
(void *)&mc);
1697
NULL, 0, browse_callback, NULL);
2395
1698
if(sb == NULL){
2396
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2397
avahi_strerror(avahi_server_errno(mc.server)));
1699
fprintf(stderr, "Failed to create service browser: %s\n",
1700
avahi_strerror(avahi_server_errno(mc.server)));
2398
1701
exitcode = EX_UNAVAILABLE;
2399
1702
goto end;
2400
1703
}
2406
1709
/* Run the main loop */
2407
1710
2408
1711
if(debug){
2409
fprintf_plus(stderr, "Starting Avahi loop search\n");
2410
}
2411
2412
ret = avahi_loop_with_timeout(simple_poll,
2413
(int)(retry_interval * 1000), &mc);
2414
if(debug){
2415
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2416
(ret == 0) ? "successfully" : "with error");
2417
}
1712
fprintf(stderr, "Starting Avahi loop search\n");
1713
}
1714
1715
avahi_simple_poll_loop(mc.simple_poll);
2418
1716
2419
1717
end:
2420
1718
2421
1719
if(debug){
2422
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1720
fprintf(stderr, "%s exiting\n", argv[0]);
2423
1721
}
2424
1722
2425
1723
/* Cleanup things */
2426
free(mc.interfaces);
2427
2428
1724
if(sb != NULL)
2429
1725
avahi_s_service_browser_free(sb);
2430
1726
2431
1727
if(mc.server != NULL)
2432
1728
avahi_server_free(mc.server);
2433
1729
2434
if(simple_poll != NULL)
2435
avahi_simple_poll_free(simple_poll);
1730
if(mc.simple_poll != NULL)
1731
avahi_simple_poll_free(mc.simple_poll);
2436
1732
2437
1733
if(gnutls_initialized){
2438
1734
gnutls_certificate_free_credentials(mc.cred);
2444
1740
gpgme_release(mc.ctx);
2445
1741
}
2446
1742
2447
/* Cleans up the circular linked list of Mandos servers the client
2448
has seen */
2449
if(mc.current_server != NULL){
2450
mc.current_server->prev->next = NULL;
2451
while(mc.current_server != NULL){
2452
server *next = mc.current_server->next;
2453
free(mc.current_server);
2454
mc.current_server = next;
1743
/* Take down the network interface */
1744
if(take_down_interface){
1745
/* Re-raise priviliges */
1746
errno = 0;
1747
ret = seteuid(0);
1748
if(ret == -1){
1749
perror("seteuid");
2455
1750
}
2456
}
2457
2458
/* Re-raise priviliges */
2459
{
2460
raise_privileges();
2461
2462
/* Run network hooks */
2463
run_network_hooks("stop", interfaces_hooks != NULL ?
2464
interfaces_hooks : "", delay);
2465
2466
/* Take down the network interfaces which were brought up */
2467
{
2468
char *interface = NULL;
2469
while((interface=argz_next(interfaces_to_take_down,
2470
interfaces_to_take_down_size,
2471
interface))){
2472
ret_errno = take_down_interface(interface);
2473
if(ret_errno != 0){
2474
errno = ret_errno;
2475
perror_plus("Failed to take down interface");
1751
if(geteuid() == 0){
1752
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1753
if(ret == -1){
1754
perror("ioctl SIOCGIFFLAGS");
1755
} else if(network.ifr_flags & IFF_UP) {
1756
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1757
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1758
if(ret == -1){
1759
perror("ioctl SIOCSIFFLAGS -IFF_UP");
2476
1760
}
2477
1761
}
2478
if(debug and (interfaces_to_take_down == NULL)){
2479
fprintf_plus(stderr, "No interfaces needed to be taken"
2480
" down\n");
1762
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1763
if(ret == -1){
1764
perror("close");
1765
}
1766
/* Lower privileges permanently */
1767
errno = 0;
1768
ret = setuid(uid);
1769
if(ret == -1){
1770
perror("setuid");
2481
1771
}
2482
1772
}
2483
2484
lower_privileges_permanently();
2485
1773
}
2486
1774
2487
free(interfaces_to_take_down);
2488
free(interfaces_hooks);
2489
2490
1775
/* Removes the GPGME temp directory and all files inside */
2491
1776
if(tempdir_created){
2492
1777
struct dirent **direntries = NULL;
2493
1778
struct dirent *direntry = NULL;
2494
int numentries = scandir(tempdir, &direntries, notdotentries,
2495
alphasort);
2496
if (numentries > 0){
2497
for(int i = 0; i < numentries; i++){
1779
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1780
if (ret > 0){
1781
for(int i = 0; i < ret; i++){
2498
1782
direntry = direntries[i];
2499
1783
char *fullname = NULL;
2500
1784
ret = asprintf(&fullname, "%s/%s", tempdir,
2501
1785
direntry->d_name);
2502
1786
if(ret < 0){
2503
perror_plus("asprintf");
1787
perror("asprintf");
2504
1788
continue;
2505
1789
}
2506
1790
ret = remove(fullname);
2507
1791
if(ret == -1){
2508
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2509
strerror(errno));
1792
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1793
strerror(errno));
2510
1794
}
2511
1795
free(fullname);
2512
1796
}
2513
1797
}
2514
1798
2515
/* need to clean even if 0 because man page doesn't specify */
1799
/* need to be cleaned even if ret == 0 because man page dont specify */
2516
1800
free(direntries);
2517
if (numentries == -1){
2518
perror_plus("scandir");
1801
if (ret == -1){
1802
perror("scandir");
2519
1803
}
2520
1804
ret = rmdir(tempdir);
2521
1805
if(ret == -1 and errno != ENOENT){
2522
perror_plus("rmdir");
1806
perror("rmdir");
2523
1807
}
2524
1808
}
2525
1809
2530
1814
&old_sigterm_action,
2531
1815
NULL));
2532
1816
if(ret == -1){
2533
perror_plus("sigaction");
1817
perror("sigaction");
2534
1818
}
2535
1819
do {
2536
1820
ret = raise(signal_received);
2537
1821
} while(ret != 0 and errno == EINTR);
2538
1822
if(ret != 0){
2539
perror_plus("raise");
1823
perror("raise");
2540
1824
abort();
2541
1825
}
2542
1826
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0