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- Committer: Björn Påhlsson
- Date: 2011-11-14 19:10:50 UTC
- mto: (505.3.9 client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: belorn@fukt.bsnet.se-20111114191050-g11po6084bl9j5kf
replace calls to fprintf with fprintf_plus.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- 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 © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 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
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif /* not _LARGEFILE_SOURCE */
35
#endif
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
38
#endif
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
63
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
63
strtoimax() */
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno,
66
66
program_invocation_short_name */
67
67
#include <time.h> /* nanosleep(), time(), sleep() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
76
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
79
78
#include <iso646.h> /* not, or, and */
80
79
#include <argp.h> /* struct argp_option, error_t, struct
81
80
argp_state, struct argp,
88
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
89
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
90
89
WEXITSTATUS(), WTERMSIG() */
91
#include <grp.h> /* setgroups() */
92
#include <argz.h> /* argz_add_sep(), argz_next(),
93
argz_delete(), argz_append(),
94
argz_stringify(), argz_add(),
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
98
90
99
91
#ifdef __linux__
100
92
#include <sys/klog.h> /* klogctl() */
142
134
static const char sys_class_net[] = "/sys/class/net";
143
135
char *connect_to = NULL;
144
136
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
uid_t uid = 65534;
147
gid_t gid = 65534;
148
137
149
138
/* Doubly linked list that need to be circularly linked when used */
150
139
typedef struct server{
151
140
const char *ip;
152
in_port_t port;
141
uint16_t port;
153
142
AvahiIfIndex if_index;
154
143
int af;
155
144
struct timespec last_seen;
159
148
160
149
/* Used for passing in values through the Avahi callback functions */
161
150
typedef struct {
151
AvahiSimplePoll *simple_poll;
162
152
AvahiServer *server;
163
153
gnutls_certificate_credentials_t cred;
164
154
unsigned int dh_bits;
166
156
const char *priority;
167
157
gpgme_ctx_t ctx;
168
158
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
171
159
} mandos_context;
172
160
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
161
/* global context so signal handler can reach it*/
162
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
175
166
176
167
sig_atomic_t quit_now = 0;
177
168
int signal_received = 0;
178
169
179
170
/* Function to use when printing errors */
180
171
void perror_plus(const char *print_text){
181
int e = errno;
182
172
fprintf(stderr, "Mandos plugin %s: ",
183
173
program_invocation_short_name);
184
errno = e;
185
174
perror(print_text);
186
175
}
187
176
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
189
177
int fprintf_plus(FILE *stream, const char *format, ...){
190
178
va_list ap;
191
179
va_start (ap, format);
192
180
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));
182
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
183
}
197
184
198
185
/*
200
187
* bytes. "buffer_capacity" is how much is currently allocated,
201
188
* "buffer_length" is how much is already used.
202
189
*/
203
__attribute__((nonnull, warn_unused_result))
204
190
size_t incbuffer(char **buffer, size_t buffer_length,
205
191
size_t buffer_capacity){
206
192
if(buffer_length + BUFFER_SIZE > buffer_capacity){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
193
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
194
if(buffer == NULL){
213
195
return 0;
214
196
}
215
*buffer = new_buf;
216
197
buffer_capacity += BUFFER_SIZE;
217
198
}
218
199
return buffer_capacity;
219
200
}
220
201
221
202
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
int af, server **current_server){
203
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
204
int af){
225
205
int ret;
226
206
server *new_server = malloc(sizeof(server));
227
207
if(new_server == NULL){
228
208
perror_plus("malloc");
229
return false;
209
return -1;
230
210
}
231
211
*new_server = (server){ .ip = strdup(ip),
232
212
.port = port,
234
214
.af = af };
235
215
if(new_server->ip == NULL){
236
216
perror_plus("strdup");
237
free(new_server);
238
return false;
239
}
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
if(ret == -1){
242
perror_plus("clock_gettime");
243
#ifdef __GNUC__
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
246
#endif
247
free((char *)(new_server->ip));
248
#ifdef __GNUC__
249
#pragma GCC diagnostic pop
250
#endif
251
free(new_server);
252
return false;
217
return -1;
253
218
}
254
219
/* Special case of first server */
255
if(*current_server == NULL){
220
if (mc.current_server == NULL){
256
221
new_server->next = new_server;
257
222
new_server->prev = new_server;
258
*current_server = new_server;
223
mc.current_server = new_server;
224
/* Place the new server last in the list */
259
225
} else {
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
226
new_server->next = mc.current_server;
227
new_server->prev = mc.current_server->prev;
263
228
new_server->prev->next = new_server;
264
(*current_server)->prev = new_server;
265
}
266
return true;
229
mc.current_server->prev = new_server;
230
}
231
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
232
if(ret == -1){
233
perror_plus("clock_gettime");
234
return -1;
235
}
236
return 0;
267
237
}
268
238
269
239
/*
270
240
* Initialize GPGME.
271
241
*/
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
276
mandos_context *mc){
242
static bool init_gpgme(const char *seckey, const char *pubkey,
243
const char *tempdir){
277
244
gpgme_error_t rc;
278
245
gpgme_engine_info_t engine_info;
279
246
247
280
248
/*
281
249
* Helper function to insert pub and seckey to the engine keyring.
282
250
*/
283
bool import_key(const char * const filename){
251
bool import_key(const char *filename){
284
252
int ret;
285
253
int fd;
286
254
gpgme_data_t pgp_data;
294
262
rc = gpgme_data_new_from_fd(&pgp_data, fd);
295
263
if(rc != GPG_ERR_NO_ERROR){
296
264
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
297
gpgme_strsource(rc), gpgme_strerror(rc));
265
gpgme_strsource(rc), gpgme_strerror(rc));
298
266
return false;
299
267
}
300
268
301
rc = gpgme_op_import(mc->ctx, pgp_data);
269
rc = gpgme_op_import(mc.ctx, pgp_data);
302
270
if(rc != GPG_ERR_NO_ERROR){
303
271
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
272
gpgme_strsource(rc), gpgme_strerror(rc));
305
273
return false;
306
274
}
307
275
322
290
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
323
291
if(rc != GPG_ERR_NO_ERROR){
324
292
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
325
gpgme_strsource(rc), gpgme_strerror(rc));
293
gpgme_strsource(rc), gpgme_strerror(rc));
326
294
return false;
327
295
}
328
296
330
298
rc = gpgme_get_engine_info(&engine_info);
331
299
if(rc != GPG_ERR_NO_ERROR){
332
300
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
333
gpgme_strsource(rc), gpgme_strerror(rc));
301
gpgme_strsource(rc), gpgme_strerror(rc));
334
302
return false;
335
303
}
336
304
while(engine_info != NULL){
342
310
engine_info = engine_info->next;
343
311
}
344
312
if(engine_info == NULL){
345
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
346
tempdir);
313
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n", tempdir);
347
314
return false;
348
315
}
349
316
350
317
/* Create new GPGME "context" */
351
rc = gpgme_new(&(mc->ctx));
318
rc = gpgme_new(&(mc.ctx));
352
319
if(rc != GPG_ERR_NO_ERROR){
353
320
fprintf_plus(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
355
gpgme_strerror(rc));
321
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
322
gpgme_strerror(rc));
356
323
return false;
357
324
}
358
325
367
334
* Decrypt OpenPGP data.
368
335
* Returns -1 on error
369
336
*/
370
__attribute__((nonnull, warn_unused_result))
371
337
static ssize_t pgp_packet_decrypt(const char *cryptotext,
372
338
size_t crypto_size,
373
char **plaintext,
374
mandos_context *mc){
339
char **plaintext){
375
340
gpgme_data_t dh_crypto, dh_plain;
376
341
gpgme_error_t rc;
377
342
ssize_t ret;
387
352
0);
388
353
if(rc != GPG_ERR_NO_ERROR){
389
354
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
390
gpgme_strsource(rc), gpgme_strerror(rc));
355
gpgme_strsource(rc), gpgme_strerror(rc));
391
356
return -1;
392
357
}
393
358
395
360
rc = gpgme_data_new(&dh_plain);
396
361
if(rc != GPG_ERR_NO_ERROR){
397
362
fprintf_plus(stderr, "Mandos plugin mandos-client: "
398
"bad gpgme_data_new: %s: %s\n",
399
gpgme_strsource(rc), gpgme_strerror(rc));
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
400
365
gpgme_data_release(dh_crypto);
401
366
return -1;
402
367
}
403
368
404
369
/* Decrypt data from the cryptotext data buffer to the plaintext
405
370
data buffer */
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
407
372
if(rc != GPG_ERR_NO_ERROR){
408
373
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
409
gpgme_strsource(rc), gpgme_strerror(rc));
374
gpgme_strsource(rc), gpgme_strerror(rc));
410
375
plaintext_length = -1;
411
376
if(debug){
412
377
gpgme_decrypt_result_t result;
413
result = gpgme_op_decrypt_result(mc->ctx);
378
result = gpgme_op_decrypt_result(mc.ctx);
414
379
if(result == NULL){
415
380
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
416
381
} else {
417
382
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
383
result->unsupported_algorithm);
419
384
fprintf_plus(stderr, "Wrong key usage: %u\n",
420
result->wrong_key_usage);
385
result->wrong_key_usage);
421
386
if(result->file_name != NULL){
422
387
fprintf_plus(stderr, "File name: %s\n", result->file_name);
423
388
}
425
390
recipient = result->recipients;
426
391
while(recipient != NULL){
427
392
fprintf_plus(stderr, "Public key algorithm: %s\n",
428
gpgme_pubkey_algo_name
429
(recipient->pubkey_algo));
393
gpgme_pubkey_algo_name(recipient->pubkey_algo));
430
394
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
431
395
fprintf_plus(stderr, "Secret key available: %s\n",
432
recipient->status == GPG_ERR_NO_SECKEY
433
? "No" : "Yes");
396
recipient->status == GPG_ERR_NO_SECKEY
397
? "No" : "Yes");
434
398
recipient = recipient->next;
435
399
}
436
400
}
493
457
return plaintext_length;
494
458
}
495
459
496
__attribute__((warn_unused_result))
497
static const char *safer_gnutls_strerror(int value){
498
const char *ret = gnutls_strerror(value);
460
static const char * safer_gnutls_strerror(int value){
461
const char *ret = gnutls_strerror(value); /* Spurious warning from
462
-Wunreachable-code */
499
463
if(ret == NULL)
500
464
ret = "(unknown)";
501
465
return ret;
502
466
}
503
467
504
468
/* GnuTLS log function callback */
505
__attribute__((nonnull))
506
469
static void debuggnutls(__attribute__((unused)) int level,
507
470
const char* string){
508
471
fprintf_plus(stderr, "GnuTLS: %s", string);
509
472
}
510
473
511
__attribute__((nonnull, warn_unused_result))
512
474
static int init_gnutls_global(const char *pubkeyfilename,
513
const char *seckeyfilename,
514
mandos_context *mc){
475
const char *seckeyfilename){
515
476
int ret;
516
477
517
478
if(debug){
520
481
521
482
ret = gnutls_global_init();
522
483
if(ret != GNUTLS_E_SUCCESS){
523
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
524
safer_gnutls_strerror(ret));
484
fprintf_plus(stderr, "GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
525
485
return -1;
526
486
}
527
487
534
494
}
535
495
536
496
/* OpenPGP credentials */
537
ret = gnutls_certificate_allocate_credentials(&mc->cred);
497
ret = gnutls_certificate_allocate_credentials(&mc.cred);
538
498
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
540
safer_gnutls_strerror(ret));
499
fprintf_plus(stderr, "GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
541
500
gnutls_global_deinit();
542
501
return -1;
543
502
}
544
503
545
504
if(debug){
546
505
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
547
" secret key %s as GnuTLS credentials\n",
548
pubkeyfilename,
549
seckeyfilename);
506
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
507
seckeyfilename);
550
508
}
551
509
552
510
ret = gnutls_certificate_set_openpgp_key_file
553
(mc->cred, pubkeyfilename, seckeyfilename,
511
(mc.cred, pubkeyfilename, seckeyfilename,
554
512
GNUTLS_OPENPGP_FMT_BASE64);
555
513
if(ret != GNUTLS_E_SUCCESS){
556
514
fprintf_plus(stderr,
557
515
"Error[%d] while reading the OpenPGP key pair ('%s',"
558
516
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
559
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
560
safer_gnutls_strerror(ret));
517
fprintf_plus(stderr, "The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
561
518
goto globalfail;
562
519
}
563
520
564
521
/* GnuTLS server initialization */
565
ret = gnutls_dh_params_init(&mc->dh_params);
522
ret = gnutls_dh_params_init(&mc.dh_params);
566
523
if(ret != GNUTLS_E_SUCCESS){
567
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
568
" initialization: %s\n",
569
safer_gnutls_strerror(ret));
524
fprintf_plus(stderr, "Error in GnuTLS DH parameter initialization:"
525
" %s\n", safer_gnutls_strerror(ret));
570
526
goto globalfail;
571
527
}
572
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
528
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
573
529
if(ret != GNUTLS_E_SUCCESS){
574
530
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
575
safer_gnutls_strerror(ret));
531
safer_gnutls_strerror(ret));
576
532
goto globalfail;
577
533
}
578
534
579
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
535
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
580
536
581
537
return 0;
582
538
583
539
globalfail:
584
540
585
gnutls_certificate_free_credentials(mc->cred);
541
gnutls_certificate_free_credentials(mc.cred);
586
542
gnutls_global_deinit();
587
gnutls_dh_params_deinit(mc->dh_params);
543
gnutls_dh_params_deinit(mc.dh_params);
588
544
return -1;
589
545
}
590
546
591
__attribute__((nonnull, warn_unused_result))
592
static int init_gnutls_session(gnutls_session_t *session,
593
mandos_context *mc){
547
static int init_gnutls_session(gnutls_session_t *session){
594
548
int ret;
595
549
/* GnuTLS session creation */
596
550
do {
600
554
}
601
555
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
602
556
if(ret != GNUTLS_E_SUCCESS){
603
fprintf_plus(stderr,
604
"Error in GnuTLS session initialization: %s\n",
605
safer_gnutls_strerror(ret));
557
fprintf_plus(stderr, "Error in GnuTLS session initialization: %s\n",
558
safer_gnutls_strerror(ret));
606
559
}
607
560
608
561
{
609
562
const char *err;
610
563
do {
611
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
564
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
612
565
if(quit_now){
613
566
gnutls_deinit(*session);
614
567
return -1;
616
569
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
617
570
if(ret != GNUTLS_E_SUCCESS){
618
571
fprintf_plus(stderr, "Syntax error at: %s\n", err);
619
fprintf_plus(stderr, "GnuTLS error: %s\n",
620
safer_gnutls_strerror(ret));
572
fprintf_plus(stderr, "GnuTLS error: %s\n", safer_gnutls_strerror(ret));
621
573
gnutls_deinit(*session);
622
574
return -1;
623
575
}
625
577
626
578
do {
627
579
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
628
mc->cred);
580
mc.cred);
629
581
if(quit_now){
630
582
gnutls_deinit(*session);
631
583
return -1;
633
585
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
634
586
if(ret != GNUTLS_E_SUCCESS){
635
587
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
636
safer_gnutls_strerror(ret));
588
safer_gnutls_strerror(ret));
637
589
gnutls_deinit(*session);
638
590
return -1;
639
591
}
641
593
/* ignore client certificate if any. */
642
594
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
643
595
644
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
596
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
645
597
646
598
return 0;
647
599
}
651
603
__attribute__((unused)) const char *txt){}
652
604
653
605
/* Called when a Mandos server is found */
654
__attribute__((nonnull, warn_unused_result))
655
static int start_mandos_communication(const char *ip, in_port_t port,
606
static int start_mandos_communication(const char *ip, uint16_t port,
656
607
AvahiIfIndex if_index,
657
int af, mandos_context *mc){
608
int af){
658
609
int ret, tcp_sd = -1;
659
610
ssize_t sret;
660
struct sockaddr_storage to;
611
union {
612
struct sockaddr_in in;
613
struct sockaddr_in6 in6;
614
} to;
661
615
char *buffer = NULL;
662
616
char *decrypted_buffer = NULL;
663
617
size_t buffer_length = 0;
687
641
return -1;
688
642
}
689
643
690
/* If the interface is specified and we have a list of interfaces */
691
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
692
/* Check if the interface is one of the interfaces we are using */
693
bool match = false;
694
{
695
char *interface = NULL;
696
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
697
interface))){
698
if(if_nametoindex(interface) == (unsigned int)if_index){
699
match = true;
700
break;
701
}
702
}
703
}
704
if(not match){
705
/* This interface does not match any in the list, so we don't
706
connect to the server */
707
if(debug){
708
char interface[IF_NAMESIZE];
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
711
} else {
712
fprintf_plus(stderr, "Skipping server on non-used interface"
713
" \"%s\"\n",
714
if_indextoname((unsigned int)if_index,
715
interface));
716
}
717
}
718
return -1;
719
}
720
}
721
722
ret = init_gnutls_session(&session, mc);
644
ret = init_gnutls_session(&session);
723
645
if(ret != 0){
724
646
return -1;
725
647
}
726
648
727
649
if(debug){
728
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
729
PRIuMAX "\n", ip, (uintmax_t)port);
650
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %" PRIu16
651
"\n", ip, port);
730
652
}
731
653
732
654
tcp_sd = socket(pf, SOCK_STREAM, 0);
744
666
745
667
memset(&to, 0, sizeof(to));
746
668
if(af == AF_INET6){
747
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
748
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
669
to.in6.sin6_family = (sa_family_t)af;
670
ret = inet_pton(af, ip, &to.in6.sin6_addr);
749
671
} else { /* IPv4 */
750
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
751
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
672
to.in.sin_family = (sa_family_t)af;
673
ret = inet_pton(af, ip, &to.in.sin_addr);
752
674
}
753
675
if(ret < 0 ){
754
676
int e = errno;
763
685
goto mandos_end;
764
686
}
765
687
if(af == AF_INET6){
766
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
767
if(IN6_IS_ADDR_LINKLOCAL
768
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
688
to.in6.sin6_port = htons(port); /* Spurious warnings from
689
-Wconversion and
690
-Wunreachable-code */
691
692
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
693
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
694
-Wunreachable-code*/
769
695
if(if_index == AVAHI_IF_UNSPEC){
770
fprintf_plus(stderr, "An IPv6 link-local address is"
771
" incomplete without a network interface\n");
696
fprintf_plus(stderr, "An IPv6 link-local address is incomplete"
697
" without a network interface\n");
772
698
errno = EINVAL;
773
699
goto mandos_end;
774
700
}
775
701
/* Set the network interface number as scope */
776
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
702
to.in6.sin6_scope_id = (uint32_t)if_index;
777
703
}
778
704
} else {
779
((struct sockaddr_in *)&to)->sin_port = htons(port);
705
to.in.sin_port = htons(port); /* Spurious warnings from
706
-Wconversion and
707
-Wunreachable-code */
780
708
}
781
709
782
710
if(quit_now){
790
718
if(if_indextoname((unsigned int)if_index, interface) == NULL){
791
719
perror_plus("if_indextoname");
792
720
} else {
793
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
794
"\n", ip, interface, (uintmax_t)port);
721
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
722
ip, interface, port);
795
723
}
796
724
} else {
797
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
798
ip, (uintmax_t)port);
725
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n", ip, port);
799
726
}
800
727
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
801
728
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
729
const char *pcret;
802
730
if(af == AF_INET6){
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
806
NI_NUMERICHOST);
731
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
732
sizeof(addrstr));
807
733
} else {
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
811
NI_NUMERICHOST);
734
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
735
sizeof(addrstr));
812
736
}
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
737
if(pcret == NULL){
738
perror_plus("inet_ntop");
739
} else {
740
if(strcmp(addrstr, ip) != 0){
741
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
742
}
819
743
}
820
744
}
821
745
825
749
}
826
750
827
751
if(af == AF_INET6){
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
752
ret = connect(tcp_sd, &to.in6, sizeof(to));
830
753
} else {
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
754
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
833
755
}
834
756
if(ret < 0){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
757
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
836
758
int e = errno;
837
759
perror_plus("connect");
838
760
errno = e;
884
806
goto mandos_end;
885
807
}
886
808
887
/* This casting via intptr_t is to eliminate warning about casting
888
an int to a pointer type. This is exactly how the GnuTLS Guile
889
function "set-session-transport-fd!" does it. */
890
gnutls_transport_set_ptr(session,
891
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
809
/* Spurious warning from -Wint-to-pointer-cast */
810
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
892
811
893
812
if(quit_now){
894
813
errno = EINTR;
915
834
/* Read OpenPGP packet that contains the wanted password */
916
835
917
836
if(debug){
918
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
919
" %s\n", ip);
837
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from %s\n", ip);
920
838
}
921
839
922
840
while(true){
960
878
}
961
879
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
962
880
if(ret < 0){
963
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
964
"***\n");
881
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed ***\n");
965
882
gnutls_perror(ret);
966
883
errno = EPROTO;
967
884
goto mandos_end;
969
886
break;
970
887
default:
971
888
fprintf_plus(stderr, "Unknown error while reading data from"
972
" encrypted session with Mandos server\n");
889
" encrypted session with Mandos server\n");
973
890
gnutls_bye(session, GNUTLS_SHUT_RDWR);
974
891
errno = EIO;
975
892
goto mandos_end;
999
916
if(buffer_length > 0){
1000
917
ssize_t decrypted_buffer_size;
1001
918
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
1002
&decrypted_buffer, mc);
919
&decrypted_buffer);
1003
920
if(decrypted_buffer_size >= 0){
1004
921
1005
922
written = 0;
1016
933
int e = errno;
1017
934
if(debug){
1018
935
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1019
strerror(errno));
936
strerror(errno));
1020
937
}
1021
938
errno = e;
1022
939
goto mandos_end;
1053
970
return retval;
1054
971
}
1055
972
1056
__attribute__((nonnull))
1057
973
static void resolve_callback(AvahiSServiceResolver *r,
1058
974
AvahiIfIndex interface,
1059
975
AvahiProtocol proto,
1067
983
AVAHI_GCC_UNUSED AvahiStringList *txt,
1068
984
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1069
985
flags,
1070
void *mc){
1071
if(r == NULL){
1072
return;
1073
}
986
AVAHI_GCC_UNUSED void* userdata){
987
assert(r);
1074
988
1075
989
/* Called whenever a service has been resolved successfully or
1076
990
timed out */
1077
991
1078
992
if(quit_now){
1079
avahi_s_service_resolver_free(r);
1080
993
return;
1081
994
}
1082
995
1083
996
switch(event){
1084
997
default:
1085
998
case AVAHI_RESOLVER_FAILURE:
1086
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1087
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1088
domain,
1089
avahi_strerror(avahi_server_errno
1090
(((mandos_context*)mc)->server)));
999
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1000
" of type '%s' in domain '%s': %s\n", name, type, domain,
1001
avahi_strerror(avahi_server_errno(mc.server)));
1091
1002
break;
1092
1003
1093
1004
case AVAHI_RESOLVER_FOUND:
1096
1007
avahi_address_snprint(ip, sizeof(ip), address);
1097
1008
if(debug){
1098
1009
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1099
PRIdMAX ") on port %" PRIu16 "\n", name,
1100
host_name, ip, (intmax_t)interface, port);
1010
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1011
ip, (intmax_t)interface, port);
1101
1012
}
1102
int ret = start_mandos_communication(ip, (in_port_t)port,
1103
interface,
1104
avahi_proto_to_af(proto),
1105
mc);
1013
int ret = start_mandos_communication(ip, port, interface,
1014
avahi_proto_to_af(proto));
1106
1015
if(ret == 0){
1107
avahi_simple_poll_quit(simple_poll);
1016
avahi_simple_poll_quit(mc.simple_poll);
1108
1017
} else {
1109
if(not add_server(ip, (in_port_t)port, interface,
1110
avahi_proto_to_af(proto),
1111
&((mandos_context*)mc)->current_server)){
1112
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1113
" list\n", name);
1114
}
1018
ret = add_server(ip, port, interface,
1019
avahi_proto_to_af(proto));
1115
1020
}
1116
1021
}
1117
1022
}
1127
1032
const char *domain,
1128
1033
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1129
1034
flags,
1130
void *mc){
1131
if(b == NULL){
1132
return;
1133
}
1035
AVAHI_GCC_UNUSED void* userdata){
1036
assert(b);
1134
1037
1135
1038
/* Called whenever a new services becomes available on the LAN or
1136
1039
is removed from the LAN */
1144
1047
case AVAHI_BROWSER_FAILURE:
1145
1048
1146
1049
fprintf_plus(stderr, "(Avahi browser) %s\n",
1147
avahi_strerror(avahi_server_errno
1148
(((mandos_context*)mc)->server)));
1149
avahi_simple_poll_quit(simple_poll);
1050
avahi_strerror(avahi_server_errno(mc.server)));
1051
avahi_simple_poll_quit(mc.simple_poll);
1150
1052
return;
1151
1053
1152
1054
case AVAHI_BROWSER_NEW:
1155
1057
the callback function is called the Avahi server will free the
1156
1058
resolver for us. */
1157
1059
1158
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1159
interface, protocol, name, type,
1160
domain, protocol, 0,
1161
resolve_callback, mc) == NULL)
1162
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1163
" %s\n", name,
1164
avahi_strerror(avahi_server_errno
1165
(((mandos_context*)mc)->server)));
1060
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1061
name, type, domain, protocol, 0,
1062
resolve_callback, NULL) == NULL)
1063
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1064
name, avahi_strerror(avahi_server_errno(mc.server)));
1166
1065
break;
1167
1066
1168
1067
case AVAHI_BROWSER_REMOVE:
1171
1070
case AVAHI_BROWSER_ALL_FOR_NOW:
1172
1071
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1173
1072
if(debug){
1174
fprintf_plus(stderr, "No Mandos server found, still"
1175
" searching...\n");
1073
fprintf_plus(stderr, "No Mandos server found, still searching...\n");
1176
1074
}
1177
1075
break;
1178
1076
}
1187
1085
signal_received = sig;
1188
1086
int old_errno = errno;
1189
1087
/* set main loop to exit */
1190
if(simple_poll != NULL){
1191
avahi_simple_poll_quit(simple_poll);
1088
if(mc.simple_poll != NULL){
1089
avahi_simple_poll_quit(mc.simple_poll);
1192
1090
}
1193
1091
errno = old_errno;
1194
1092
}
1195
1093
1196
__attribute__((nonnull, warn_unused_result))
1197
1094
bool get_flags(const char *ifname, struct ifreq *ifr){
1198
1095
int ret;
1199
error_t ret_errno;
1200
1096
1201
1097
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1202
1098
if(s < 0){
1203
ret_errno = errno;
1204
1099
perror_plus("socket");
1205
errno = ret_errno;
1206
1100
return false;
1207
1101
}
1208
1102
strcpy(ifr->ifr_name, ifname);
1209
1103
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1210
1104
if(ret == -1){
1211
1105
if(debug){
1212
ret_errno = errno;
1213
1106
perror_plus("ioctl SIOCGIFFLAGS");
1214
errno = ret_errno;
1215
1107
}
1216
1108
return false;
1217
1109
}
1218
1110
return true;
1219
1111
}
1220
1112
1221
__attribute__((nonnull, warn_unused_result))
1222
1113
bool good_flags(const char *ifname, const struct ifreq *ifr){
1223
1114
1224
1115
/* Reject the loopback device */
1225
1116
if(ifr->ifr_flags & IFF_LOOPBACK){
1226
1117
if(debug){
1227
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1228
ifname);
1118
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n", ifname);
1229
1119
}
1230
1120
return false;
1231
1121
}
1232
1122
/* Accept point-to-point devices only if connect_to is specified */
1233
1123
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1234
1124
if(debug){
1235
fprintf_plus(stderr, "Accepting point-to-point interface"
1236
" \"%s\"\n", ifname);
1125
fprintf_plus(stderr, "Accepting point-to-point interface \"%s\"\n", ifname);
1237
1126
}
1238
1127
return true;
1239
1128
}
1240
1129
/* Otherwise, reject non-broadcast-capable devices */
1241
1130
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1242
1131
if(debug){
1243
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1244
" \"%s\"\n", ifname);
1132
fprintf_plus(stderr, "Rejecting non-broadcast interface \"%s\"\n", ifname);
1245
1133
}
1246
1134
return false;
1247
1135
}
1248
1136
/* Reject non-ARP interfaces (including dummy interfaces) */
1249
1137
if(ifr->ifr_flags & IFF_NOARP){
1250
1138
if(debug){
1251
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1252
ifname);
1139
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1253
1140
}
1254
1141
return false;
1255
1142
}
1266
1153
* corresponds to an acceptable network device.
1267
1154
* (This function is passed to scandir(3) as a filter function.)
1268
1155
*/
1269
__attribute__((nonnull, warn_unused_result))
1270
1156
int good_interface(const struct dirent *if_entry){
1271
1157
if(if_entry->d_name[0] == '.'){
1272
1158
return 0;
1275
1161
struct ifreq ifr;
1276
1162
if(not get_flags(if_entry->d_name, &ifr)){
1277
1163
if(debug){
1278
fprintf_plus(stderr, "Failed to get flags for interface "
1279
"\"%s\"\n", if_entry->d_name);
1280
}
1281
return 0;
1282
}
1283
1284
if(not good_flags(if_entry->d_name, &ifr)){
1285
return 0;
1286
}
1287
return 1;
1288
}
1289
1290
/*
1291
* This function determines if a network interface is up.
1292
*/
1293
__attribute__((nonnull, warn_unused_result))
1294
bool interface_is_up(const char *interface){
1295
struct ifreq ifr;
1296
if(not get_flags(interface, &ifr)){
1297
if(debug){
1298
fprintf_plus(stderr, "Failed to get flags for interface "
1299
"\"%s\"\n", interface);
1300
}
1301
return false;
1302
}
1303
1304
return (bool)(ifr.ifr_flags & IFF_UP);
1305
}
1306
1307
/*
1308
* This function determines if a network interface is running
1309
*/
1310
__attribute__((nonnull, warn_unused_result))
1311
bool interface_is_running(const char *interface){
1312
struct ifreq ifr;
1313
if(not get_flags(interface, &ifr)){
1314
if(debug){
1315
fprintf_plus(stderr, "Failed to get flags for interface "
1316
"\"%s\"\n", interface);
1317
}
1318
return false;
1319
}
1320
1321
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1322
}
1323
1324
__attribute__((nonnull, pure, warn_unused_result))
1164
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1165
if_entry->d_name);
1166
}
1167
return 0;
1168
}
1169
1170
if(not good_flags(if_entry->d_name, &ifr)){
1171
return 0;
1172
}
1173
return 1;
1174
}
1175
1176
/*
1177
* This function determines if a directory entry in /sys/class/net
1178
* corresponds to an acceptable network device which is up.
1179
* (This function is passed to scandir(3) as a filter function.)
1180
*/
1181
int up_interface(const struct dirent *if_entry){
1182
if(if_entry->d_name[0] == '.'){
1183
return 0;
1184
}
1185
1186
struct ifreq ifr;
1187
if(not get_flags(if_entry->d_name, &ifr)){
1188
if(debug){
1189
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1190
if_entry->d_name);
1191
}
1192
return 0;
1193
}
1194
1195
/* Reject down interfaces */
1196
if(not (ifr.ifr_flags & IFF_UP)){
1197
if(debug){
1198
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1199
if_entry->d_name);
1200
}
1201
return 0;
1202
}
1203
1204
/* Reject non-running interfaces */
1205
if(not (ifr.ifr_flags & IFF_RUNNING)){
1206
if(debug){
1207
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1208
if_entry->d_name);
1209
}
1210
return 0;
1211
}
1212
1213
if(not good_flags(if_entry->d_name, &ifr)){
1214
return 0;
1215
}
1216
return 1;
1217
}
1218
1325
1219
int notdotentries(const struct dirent *direntry){
1326
1220
/* Skip "." and ".." */
1327
1221
if(direntry->d_name[0] == '.'
1334
1228
}
1335
1229
1336
1230
/* Is this directory entry a runnable program? */
1337
__attribute__((nonnull, warn_unused_result))
1338
1231
int runnable_hook(const struct dirent *direntry){
1339
1232
int ret;
1340
1233
size_t sret;
1348
1241
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1349
1242
"abcdefghijklmnopqrstuvwxyz"
1350
1243
"0123456789"
1351
"_.-");
1244
"_-");
1352
1245
if((direntry->d_name)[sret] != '\0'){
1353
1246
/* Contains non-allowed characters */
1354
1247
if(debug){
1355
1248
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1356
direntry->d_name);
1249
direntry->d_name);
1357
1250
}
1358
1251
return 0;
1359
1252
}
1360
1253
1361
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1254
char *fullname = NULL;
1255
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1256
if(ret < 0){
1257
perror_plus("asprintf");
1258
return 0;
1259
}
1260
1261
ret = stat(fullname, &st);
1362
1262
if(ret == -1){
1363
1263
if(debug){
1364
1264
perror_plus("Could not stat hook");
1369
1269
/* Not a regular file */
1370
1270
if(debug){
1371
1271
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1372
direntry->d_name);
1272
direntry->d_name);
1373
1273
}
1374
1274
return 0;
1375
1275
}
1377
1277
/* Not executable */
1378
1278
if(debug){
1379
1279
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1380
direntry->d_name);
1280
direntry->d_name);
1381
1281
}
1382
1282
return 0;
1383
1283
}
1384
if(debug){
1385
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1386
direntry->d_name);
1387
}
1388
1284
return 1;
1389
1285
}
1390
1286
1391
__attribute__((nonnull, warn_unused_result))
1392
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1393
mandos_context *mc){
1287
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1394
1288
int ret;
1395
1289
struct timespec now;
1396
1290
struct timespec waited_time;
1397
1291
intmax_t block_time;
1398
1292
1399
1293
while(true){
1400
if(mc->current_server == NULL){
1401
if(debug){
1402
fprintf_plus(stderr, "Wait until first server is found."
1403
" No timeout!\n");
1294
if(mc.current_server == NULL){
1295
if (debug){
1296
fprintf_plus(stderr, "Wait until first server is found. No timeout!\n");
1404
1297
}
1405
1298
ret = avahi_simple_poll_iterate(s, -1);
1406
1299
} else {
1407
if(debug){
1408
fprintf_plus(stderr, "Check current_server if we should run"
1409
" it, or wait\n");
1300
if (debug){
1301
fprintf_plus(stderr, "Check current_server if we should run it,"
1302
" or wait\n");
1410
1303
}
1411
1304
/* the current time */
1412
1305
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1417
1310
/* Calculating in ms how long time between now and server
1418
1311
who we visted longest time ago. Now - last seen. */
1419
1312
waited_time.tv_sec = (now.tv_sec
1420
- mc->current_server->last_seen.tv_sec);
1313
- mc.current_server->last_seen.tv_sec);
1421
1314
waited_time.tv_nsec = (now.tv_nsec
1422
- mc->current_server->last_seen.tv_nsec);
1315
- mc.current_server->last_seen.tv_nsec);
1423
1316
/* total time is 10s/10,000ms.
1424
1317
Converting to s from ms by dividing by 1,000,
1425
1318
and ns to ms by dividing by 1,000,000. */
1427
1320
- ((intmax_t)waited_time.tv_sec * 1000))
1428
1321
- ((intmax_t)waited_time.tv_nsec / 1000000));
1429
1322
1430
if(debug){
1431
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1432
block_time);
1323
if (debug){
1324
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1433
1325
}
1434
1326
1435
1327
if(block_time <= 0){
1436
ret = start_mandos_communication(mc->current_server->ip,
1437
mc->current_server->port,
1438
mc->current_server->if_index,
1439
mc->current_server->af, mc);
1328
ret = start_mandos_communication(mc.current_server->ip,
1329
mc.current_server->port,
1330
mc.current_server->if_index,
1331
mc.current_server->af);
1440
1332
if(ret == 0){
1441
avahi_simple_poll_quit(s);
1333
avahi_simple_poll_quit(mc.simple_poll);
1442
1334
return 0;
1443
1335
}
1444
1336
ret = clock_gettime(CLOCK_MONOTONIC,
1445
&mc->current_server->last_seen);
1337
&mc.current_server->last_seen);
1446
1338
if(ret == -1){
1447
1339
perror_plus("clock_gettime");
1448
1340
return -1;
1449
1341
}
1450
mc->current_server = mc->current_server->next;
1342
mc.current_server = mc.current_server->next;
1451
1343
block_time = 0; /* Call avahi to find new Mandos
1452
1344
servers, but don't block */
1453
1345
}
1455
1347
ret = avahi_simple_poll_iterate(s, (int)block_time);
1456
1348
}
1457
1349
if(ret != 0){
1458
if(ret > 0 or errno != EINTR){
1350
if (ret > 0 or errno != EINTR){
1459
1351
return (ret != 1) ? ret : 0;
1460
1352
}
1461
1353
}
1462
1354
}
1463
1355
}
1464
1356
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1467
error_t raise_privileges(void){
1468
error_t old_errno = errno;
1469
error_t ret_errno = 0;
1470
if(seteuid(0) == -1){
1471
ret_errno = errno;
1472
}
1473
errno = old_errno;
1474
return ret_errno;
1475
}
1476
1477
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1479
error_t raise_privileges_permanently(void){
1480
error_t old_errno = errno;
1481
error_t ret_errno = raise_privileges();
1482
if(ret_errno != 0){
1483
errno = old_errno;
1484
return ret_errno;
1485
}
1486
if(setuid(0) == -1){
1487
ret_errno = errno;
1488
}
1489
errno = old_errno;
1490
return ret_errno;
1491
}
1492
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1495
error_t lower_privileges(void){
1496
error_t old_errno = errno;
1497
error_t ret_errno = 0;
1498
if(seteuid(uid) == -1){
1499
ret_errno = errno;
1500
}
1501
errno = old_errno;
1502
return ret_errno;
1503
}
1504
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1507
error_t lower_privileges_permanently(void){
1508
error_t old_errno = errno;
1509
error_t ret_errno = 0;
1510
if(setuid(uid) == -1){
1511
ret_errno = errno;
1512
}
1513
errno = old_errno;
1514
return ret_errno;
1515
}
1516
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1519
const float delay){
1520
struct dirent **direntries = NULL;
1521
if(hookdir_fd == -1){
1522
hookdir_fd = open(hookdir, O_RDONLY);
1523
if(hookdir_fd == -1){
1524
if(errno == ENOENT){
1525
if(debug){
1526
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1527
" found\n", hookdir);
1528
}
1529
} else {
1530
perror_plus("open");
1531
}
1532
return;
1533
}
1534
}
1535
#ifdef __GLIBC__
1536
#if __GLIBC_PREREQ(2, 15)
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
alphasort);
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
alphasort);
1546
#endif /* not __GLIBC__ */
1547
if(numhooks == -1){
1548
perror_plus("scandir");
1549
return;
1550
}
1551
struct dirent *direntry;
1552
int ret;
1553
int devnull = open("/dev/null", O_RDONLY);
1554
for(int i = 0; i < numhooks; i++){
1555
direntry = direntries[i];
1556
if(debug){
1557
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1558
direntry->d_name);
1559
}
1560
pid_t hook_pid = fork();
1561
if(hook_pid == 0){
1562
/* Child */
1563
/* Raise privileges */
1564
errno = raise_privileges_permanently();
1565
if(errno != 0){
1566
perror_plus("Failed to raise privileges");
1567
_exit(EX_NOPERM);
1568
}
1569
/* Set group */
1570
errno = 0;
1571
ret = setgid(0);
1572
if(ret == -1){
1573
perror_plus("setgid");
1574
_exit(EX_NOPERM);
1575
}
1576
/* Reset supplementary groups */
1577
errno = 0;
1578
ret = setgroups(0, NULL);
1579
if(ret == -1){
1580
perror_plus("setgroups");
1581
_exit(EX_NOPERM);
1582
}
1583
ret = dup2(devnull, STDIN_FILENO);
1584
if(ret == -1){
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1586
_exit(EX_OSERR);
1587
}
1588
ret = close(devnull);
1589
if(ret == -1){
1590
perror_plus("close");
1591
_exit(EX_OSERR);
1592
}
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
if(ret == -1){
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1596
_exit(EX_OSERR);
1597
}
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1599
if(ret == -1){
1600
perror_plus("setenv");
1601
_exit(EX_OSERR);
1602
}
1603
ret = setenv("DEVICE", interface, 1);
1604
if(ret == -1){
1605
perror_plus("setenv");
1606
_exit(EX_OSERR);
1607
}
1608
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1609
if(ret == -1){
1610
perror_plus("setenv");
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("MODE", mode, 1);
1614
if(ret == -1){
1615
perror_plus("setenv");
1616
_exit(EX_OSERR);
1617
}
1618
char *delaystring;
1619
ret = asprintf(&delaystring, "%f", (double)delay);
1620
if(ret == -1){
1621
perror_plus("asprintf");
1622
_exit(EX_OSERR);
1623
}
1624
ret = setenv("DELAY", delaystring, 1);
1625
if(ret == -1){
1626
free(delaystring);
1627
perror_plus("setenv");
1628
_exit(EX_OSERR);
1629
}
1630
free(delaystring);
1631
if(connect_to != NULL){
1632
ret = setenv("CONNECT", connect_to, 1);
1633
if(ret == -1){
1634
perror_plus("setenv");
1635
_exit(EX_OSERR);
1636
}
1637
}
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1639
if(hook_fd == -1){
1640
perror_plus("openat");
1641
_exit(EXIT_FAILURE);
1642
}
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1644
perror_plus("close");
1645
_exit(EXIT_FAILURE);
1646
}
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1648
environ) == -1){
1649
perror_plus("fexecve");
1650
_exit(EXIT_FAILURE);
1651
}
1652
} else {
1653
int status;
1654
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1655
perror_plus("waitpid");
1656
free(direntry);
1657
continue;
1658
}
1659
if(WIFEXITED(status)){
1660
if(WEXITSTATUS(status) != 0){
1661
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1662
" with status %d\n", direntry->d_name,
1663
WEXITSTATUS(status));
1664
free(direntry);
1665
continue;
1666
}
1667
} else if(WIFSIGNALED(status)){
1668
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1669
" signal %d\n", direntry->d_name,
1670
WTERMSIG(status));
1671
free(direntry);
1672
continue;
1673
} else {
1674
fprintf_plus(stderr, "Warning: network hook \"%s\""
1675
" crashed\n", direntry->d_name);
1676
free(direntry);
1677
continue;
1678
}
1679
}
1680
if(debug){
1681
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1682
direntry->d_name);
1683
}
1684
free(direntry);
1685
}
1686
free(direntries);
1687
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1688
perror_plus("close");
1689
} else {
1690
hookdir_fd = -1;
1691
}
1692
close(devnull);
1693
}
1694
1695
__attribute__((nonnull, warn_unused_result))
1696
error_t bring_up_interface(const char *const interface,
1697
const float delay){
1698
error_t old_errno = errno;
1699
int ret;
1700
struct ifreq network;
1701
unsigned int if_index = if_nametoindex(interface);
1702
if(if_index == 0){
1703
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1704
errno = old_errno;
1705
return ENXIO;
1706
}
1707
1708
if(quit_now){
1709
errno = old_errno;
1710
return EINTR;
1711
}
1712
1713
if(not interface_is_up(interface)){
1714
error_t ret_errno = 0, ioctl_errno = 0;
1715
if(not get_flags(interface, &network)){
1716
ret_errno = errno;
1717
fprintf_plus(stderr, "Failed to get flags for interface "
1718
"\"%s\"\n", interface);
1719
errno = old_errno;
1720
return ret_errno;
1721
}
1722
network.ifr_flags |= IFF_UP; /* set flag */
1723
1724
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1725
if(sd == -1){
1726
ret_errno = errno;
1727
perror_plus("socket");
1728
errno = old_errno;
1729
return ret_errno;
1730
}
1731
1732
if(quit_now){
1733
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1734
if(ret == -1){
1735
perror_plus("close");
1736
}
1737
errno = old_errno;
1738
return EINTR;
1739
}
1740
1741
if(debug){
1742
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1743
interface);
1744
}
1745
1746
/* Raise privileges */
1747
ret_errno = raise_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to raise privileges");
1751
}
1752
1753
#ifdef __linux__
1754
int ret_linux;
1755
bool restore_loglevel = false;
1756
if(ret_errno == 0){
1757
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1758
messages about the network interface to mess up the prompt */
1759
ret_linux = klogctl(8, NULL, 5);
1760
if(ret_linux == -1){
1761
perror_plus("klogctl");
1762
} else {
1763
restore_loglevel = true;
1764
}
1765
}
1766
#endif /* __linux__ */
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1768
ioctl_errno = errno;
1769
#ifdef __linux__
1770
if(restore_loglevel){
1771
ret_linux = klogctl(7, NULL, 0);
1772
if(ret_linux == -1){
1773
perror_plus("klogctl");
1774
}
1775
}
1776
#endif /* __linux__ */
1777
1778
/* If raise_privileges() succeeded above */
1779
if(ret_errno == 0){
1780
/* Lower privileges */
1781
ret_errno = lower_privileges();
1782
if(ret_errno != 0){
1783
errno = ret_errno;
1784
perror_plus("Failed to lower privileges");
1785
}
1786
}
1787
1788
/* Close the socket */
1789
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1790
if(ret == -1){
1791
perror_plus("close");
1792
}
1793
1794
if(ret_setflags == -1){
1795
errno = ioctl_errno;
1796
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1797
errno = old_errno;
1798
return ioctl_errno;
1799
}
1800
} else if(debug){
1801
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1802
interface);
1803
}
1804
1805
/* Sleep checking until interface is running.
1806
Check every 0.25s, up to total time of delay */
1807
for(int i=0; i < delay * 4; i++){
1808
if(interface_is_running(interface)){
1809
break;
1810
}
1811
struct timespec sleeptime = { .tv_nsec = 250000000 };
1812
ret = nanosleep(&sleeptime, NULL);
1813
if(ret == -1 and errno != EINTR){
1814
perror_plus("nanosleep");
1815
}
1816
}
1817
1818
errno = old_errno;
1819
return 0;
1820
}
1821
1822
__attribute__((nonnull, warn_unused_result))
1823
error_t take_down_interface(const char *const interface){
1824
error_t old_errno = errno;
1825
struct ifreq network;
1826
unsigned int if_index = if_nametoindex(interface);
1827
if(if_index == 0){
1828
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1829
errno = old_errno;
1830
return ENXIO;
1831
}
1832
if(interface_is_up(interface)){
1833
error_t ret_errno = 0, ioctl_errno = 0;
1834
if(not get_flags(interface, &network) and debug){
1835
ret_errno = errno;
1836
fprintf_plus(stderr, "Failed to get flags for interface "
1837
"\"%s\"\n", interface);
1838
errno = old_errno;
1839
return ret_errno;
1840
}
1841
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1842
1843
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1844
if(sd == -1){
1845
ret_errno = errno;
1846
perror_plus("socket");
1847
errno = old_errno;
1848
return ret_errno;
1849
}
1850
1851
if(debug){
1852
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1853
interface);
1854
}
1855
1856
/* Raise privileges */
1857
ret_errno = raise_privileges();
1858
if(ret_errno != 0){
1859
errno = ret_errno;
1860
perror_plus("Failed to raise privileges");
1861
}
1862
1863
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1864
ioctl_errno = errno;
1865
1866
/* If raise_privileges() succeeded above */
1867
if(ret_errno == 0){
1868
/* Lower privileges */
1869
ret_errno = lower_privileges();
1870
if(ret_errno != 0){
1871
errno = ret_errno;
1872
perror_plus("Failed to lower privileges");
1873
}
1874
}
1875
1876
/* Close the socket */
1877
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1878
if(ret == -1){
1879
perror_plus("close");
1880
}
1881
1882
if(ret_setflags == -1){
1883
errno = ioctl_errno;
1884
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1885
errno = old_errno;
1886
return ioctl_errno;
1887
}
1888
} else if(debug){
1889
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1890
interface);
1891
}
1892
1893
errno = old_errno;
1894
return 0;
1895
}
1896
1897
1357
int main(int argc, char *argv[]){
1898
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1899
.priority = "SECURE256:!CTYPE-X.509:"
1900
"+CTYPE-OPENPGP", .current_server = NULL,
1901
.interfaces = NULL, .interfaces_size = 0 };
1902
1358
AvahiSServiceBrowser *sb = NULL;
1903
error_t ret_errno;
1359
int error;
1904
1360
int ret;
1905
1361
intmax_t tmpmax;
1906
1362
char *tmp;
1907
1363
int exitcode = EXIT_SUCCESS;
1908
char *interfaces_to_take_down = NULL;
1909
size_t interfaces_to_take_down_size = 0;
1910
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1911
char old_tempdir[] = "/tmp/mandosXXXXXX";
1912
char *tempdir = NULL;
1364
const char *interface = "";
1365
struct ifreq network;
1366
int sd = -1;
1367
bool take_down_interface = false;
1368
uid_t uid;
1369
gid_t gid;
1370
char tempdir[] = "/tmp/mandosXXXXXX";
1371
bool tempdir_created = false;
1913
1372
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1914
1373
const char *seckey = PATHDIR "/" SECKEY;
1915
1374
const char *pubkey = PATHDIR "/" PUBKEY;
1916
char *interfaces_hooks = NULL;
1917
1375
1918
1376
bool gnutls_initialized = false;
1919
1377
bool gpgme_initialized = false;
1981
1439
.group = 2 },
1982
1440
{ .name = "retry", .key = 132,
1983
1441
.arg = "SECONDS",
1984
.doc = "Retry interval used when denied by the Mandos server",
1442
.doc = "Retry interval used when denied by the mandos server",
1985
1443
.group = 2 },
1986
1444
{ .name = "network-hook-dir", .key = 133,
1987
1445
.arg = "DIR",
2010
1468
connect_to = arg;
2011
1469
break;
2012
1470
case 'i': /* --interface */
2013
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2014
arg, (int)',');
2015
if(ret_errno != 0){
2016
argp_error(state, "%s", strerror(ret_errno));
2017
}
1471
interface = arg;
2018
1472
break;
2019
1473
case 's': /* --seckey */
2020
1474
seckey = arg;
2063
1517
argp_state_help(state, state->out_stream,
2064
1518
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2065
1519
case 'V': /* --version */
1520
fprintf_plus(state->out_stream, "Mandos plugin mandos-client: ");
2066
1521
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
2067
1522
exit(argp_err_exit_status);
2068
1523
break;
2096
1551
{
2097
1552
/* Work around Debian bug #633582:
2098
1553
<http://bugs.debian.org/633582> */
2099
2100
/* Re-raise privileges */
2101
ret_errno = raise_privileges();
2102
if(ret_errno != 0){
2103
errno = ret_errno;
2104
perror_plus("Failed to raise privileges");
1554
struct stat st;
1555
1556
/* Re-raise priviliges */
1557
errno = 0;
1558
ret = seteuid(0);
1559
if(ret == -1){
1560
perror_plus("seteuid");
1561
}
1562
1563
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1564
int seckey_fd = open(seckey, O_RDONLY);
1565
if(seckey_fd == -1){
1566
perror_plus("open");
1567
} else {
1568
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1569
if(ret == -1){
1570
perror_plus("fstat");
1571
} else {
1572
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1573
ret = fchown(seckey_fd, uid, gid);
1574
if(ret == -1){
1575
perror_plus("fchown");
1576
}
1577
}
1578
}
1579
TEMP_FAILURE_RETRY(close(seckey_fd));
1580
}
1581
}
1582
1583
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1584
int pubkey_fd = open(pubkey, O_RDONLY);
1585
if(pubkey_fd == -1){
1586
perror_plus("open");
1587
} else {
1588
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1589
if(ret == -1){
1590
perror_plus("fstat");
1591
} else {
1592
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1593
ret = fchown(pubkey_fd, uid, gid);
1594
if(ret == -1){
1595
perror_plus("fchown");
1596
}
1597
}
1598
}
1599
TEMP_FAILURE_RETRY(close(pubkey_fd));
1600
}
1601
}
1602
1603
/* Lower privileges */
1604
errno = 0;
1605
ret = seteuid(uid);
1606
if(ret == -1){
1607
perror_plus("seteuid");
1608
}
1609
}
1610
1611
/* Find network hooks and run them */
1612
{
1613
struct dirent **direntries;
1614
struct dirent *direntry;
1615
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1616
alphasort);
1617
if(numhooks == -1){
1618
perror_plus("scandir");
2105
1619
} else {
2106
struct stat st;
2107
2108
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2109
int seckey_fd = open(seckey, O_RDONLY);
2110
if(seckey_fd == -1){
2111
perror_plus("open");
2112
} else {
2113
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2114
if(ret == -1){
2115
perror_plus("fstat");
2116
} else {
2117
if(S_ISREG(st.st_mode)
2118
and st.st_uid == 0 and st.st_gid == 0){
2119
ret = fchown(seckey_fd, uid, gid);
2120
if(ret == -1){
2121
perror_plus("fchown");
2122
}
2123
}
2124
}
2125
TEMP_FAILURE_RETRY(close(seckey_fd));
2126
}
2127
}
2128
2129
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2130
int pubkey_fd = open(pubkey, O_RDONLY);
2131
if(pubkey_fd == -1){
2132
perror_plus("open");
2133
} else {
2134
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2135
if(ret == -1){
2136
perror_plus("fstat");
2137
} else {
2138
if(S_ISREG(st.st_mode)
2139
and st.st_uid == 0 and st.st_gid == 0){
2140
ret = fchown(pubkey_fd, uid, gid);
2141
if(ret == -1){
2142
perror_plus("fchown");
2143
}
2144
}
2145
}
2146
TEMP_FAILURE_RETRY(close(pubkey_fd));
2147
}
2148
}
2149
2150
/* Lower privileges */
2151
ret_errno = lower_privileges();
2152
if(ret_errno != 0){
2153
errno = ret_errno;
2154
perror_plus("Failed to lower privileges");
2155
}
2156
}
2157
}
2158
2159
/* Remove invalid interface names (except "none") */
2160
{
2161
char *interface = NULL;
2162
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2163
interface))){
2164
if(strcmp(interface, "none") != 0
2165
and if_nametoindex(interface) == 0){
2166
if(interface[0] != '\0'){
2167
fprintf_plus(stderr, "Not using nonexisting interface"
2168
" \"%s\"\n", interface);
2169
}
2170
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2171
interface = NULL;
2172
}
2173
}
2174
}
2175
2176
/* Run network hooks */
2177
{
2178
if(mc.interfaces != NULL){
2179
interfaces_hooks = malloc(mc.interfaces_size);
2180
if(interfaces_hooks == NULL){
2181
perror_plus("malloc");
2182
goto end;
2183
}
2184
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2185
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2186
}
2187
run_network_hooks("start", interfaces_hooks != NULL ?
2188
interfaces_hooks : "", delay);
1620
int devnull = open("/dev/null", O_RDONLY);
1621
for(int i = 0; i < numhooks; i++){
1622
direntry = direntries[0];
1623
char *fullname = NULL;
1624
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1625
if(ret < 0){
1626
perror_plus("asprintf");
1627
continue;
1628
}
1629
pid_t hook_pid = fork();
1630
if(hook_pid == 0){
1631
/* Child */
1632
dup2(devnull, STDIN_FILENO);
1633
close(devnull);
1634
dup2(STDERR_FILENO, STDOUT_FILENO);
1635
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1636
if(ret == -1){
1637
perror_plus("setenv");
1638
exit(1);
1639
}
1640
ret = setenv("DEVICE", interface, 1);
1641
if(ret == -1){
1642
perror_plus("setenv");
1643
exit(1);
1644
}
1645
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1646
if(ret == -1){
1647
perror_plus("setenv");
1648
exit(1);
1649
}
1650
ret = setenv("MODE", "start", 1);
1651
if(ret == -1){
1652
perror_plus("setenv");
1653
exit(1);
1654
}
1655
char *delaystring;
1656
ret = asprintf(&delaystring, "%f", delay);
1657
if(ret == -1){
1658
perror_plus("asprintf");
1659
exit(1);
1660
}
1661
ret = setenv("DELAY", delaystring, 1);
1662
if(ret == -1){
1663
free(delaystring);
1664
perror_plus("setenv");
1665
exit(1);
1666
}
1667
free(delaystring);
1668
ret = execl(fullname, direntry->d_name, "start", NULL);
1669
perror_plus("execl");
1670
} else {
1671
int status;
1672
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1673
perror_plus("waitpid");
1674
free(fullname);
1675
continue;
1676
}
1677
if(WIFEXITED(status)){
1678
if(WEXITSTATUS(status) != 0){
1679
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1680
" with status %d\n", direntry->d_name,
1681
WEXITSTATUS(status));
1682
free(fullname);
1683
continue;
1684
}
1685
} else if(WIFSIGNALED(status)){
1686
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1687
" signal %d\n", direntry->d_name,
1688
WTERMSIG(status));
1689
free(fullname);
1690
continue;
1691
} else {
1692
fprintf_plus(stderr, "Warning: network hook \"%s\" crashed\n",
1693
direntry->d_name);
1694
free(fullname);
1695
continue;
1696
}
1697
}
1698
free(fullname);
1699
if(quit_now){
1700
goto end;
1701
}
1702
}
1703
close(devnull);
1704
}
2189
1705
}
2190
1706
2191
1707
if(not debug){
2192
1708
avahi_set_log_function(empty_log);
2193
1709
}
2194
1710
1711
if(interface[0] == '\0'){
1712
struct dirent **direntries;
1713
/* First look for interfaces that are up */
1714
ret = scandir(sys_class_net, &direntries, up_interface,
1715
alphasort);
1716
if(ret == 0){
1717
/* No up interfaces, look for any good interfaces */
1718
free(direntries);
1719
ret = scandir(sys_class_net, &direntries, good_interface,
1720
alphasort);
1721
}
1722
if(ret >= 1){
1723
/* Pick the first interface returned */
1724
interface = strdup(direntries[0]->d_name);
1725
if(debug){
1726
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1727
}
1728
if(interface == NULL){
1729
perror_plus("malloc");
1730
free(direntries);
1731
exitcode = EXIT_FAILURE;
1732
goto end;
1733
}
1734
free(direntries);
1735
} else {
1736
free(direntries);
1737
fprintf_plus(stderr, "Could not find a network interface\n");
1738
exitcode = EXIT_FAILURE;
1739
goto end;
1740
}
1741
}
1742
2195
1743
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2196
1744
from the signal handler */
2197
1745
/* Initialize the pseudo-RNG for Avahi */
2198
1746
srand((unsigned int) time(NULL));
2199
simple_poll = avahi_simple_poll_new();
2200
if(simple_poll == NULL){
2201
fprintf_plus(stderr,
2202
"Avahi: Failed to create simple poll object.\n");
1747
mc.simple_poll = avahi_simple_poll_new();
1748
if(mc.simple_poll == NULL){
1749
fprintf_plus(stderr, "Avahi: Failed to create simple poll object.\n");
2203
1750
exitcode = EX_UNAVAILABLE;
2204
1751
goto end;
2205
1752
}
2267
1814
}
2268
1815
}
2269
1816
2270
/* If no interfaces were specified, make a list */
2271
if(mc.interfaces == NULL){
2272
struct dirent **direntries = NULL;
2273
/* Look for any good interfaces */
2274
ret = scandir(sys_class_net, &direntries, good_interface,
2275
alphasort);
2276
if(ret >= 1){
2277
/* Add all found interfaces to interfaces list */
2278
for(int i = 0; i < ret; ++i){
2279
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2280
direntries[i]->d_name);
2281
if(ret_errno != 0){
2282
errno = ret_errno;
2283
perror_plus("argz_add");
2284
free(direntries[i]);
2285
continue;
2286
}
2287
if(debug){
2288
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2289
direntries[i]->d_name);
2290
}
2291
free(direntries[i]);
2292
}
2293
free(direntries);
1817
/* If the interface is down, bring it up */
1818
if(strcmp(interface, "none") != 0){
1819
if_index = (AvahiIfIndex) if_nametoindex(interface);
1820
if(if_index == 0){
1821
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1822
exitcode = EX_UNAVAILABLE;
1823
goto end;
1824
}
1825
1826
if(quit_now){
1827
goto end;
1828
}
1829
1830
/* Re-raise priviliges */
1831
errno = 0;
1832
ret = seteuid(0);
1833
if(ret == -1){
1834
perror_plus("seteuid");
1835
}
1836
1837
#ifdef __linux__
1838
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1839
messages about the network interface to mess up the prompt */
1840
ret = klogctl(8, NULL, 5);
1841
bool restore_loglevel = true;
1842
if(ret == -1){
1843
restore_loglevel = false;
1844
perror_plus("klogctl");
1845
}
1846
#endif /* __linux__ */
1847
1848
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1849
if(sd < 0){
1850
perror_plus("socket");
1851
exitcode = EX_OSERR;
1852
#ifdef __linux__
1853
if(restore_loglevel){
1854
ret = klogctl(7, NULL, 0);
1855
if(ret == -1){
1856
perror_plus("klogctl");
1857
}
1858
}
1859
#endif /* __linux__ */
1860
/* Lower privileges */
1861
errno = 0;
1862
ret = seteuid(uid);
1863
if(ret == -1){
1864
perror_plus("seteuid");
1865
}
1866
goto end;
1867
}
1868
strcpy(network.ifr_name, interface);
1869
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1870
if(ret == -1){
1871
perror_plus("ioctl SIOCGIFFLAGS");
1872
#ifdef __linux__
1873
if(restore_loglevel){
1874
ret = klogctl(7, NULL, 0);
1875
if(ret == -1){
1876
perror_plus("klogctl");
1877
}
1878
}
1879
#endif /* __linux__ */
1880
exitcode = EX_OSERR;
1881
/* Lower privileges */
1882
errno = 0;
1883
ret = seteuid(uid);
1884
if(ret == -1){
1885
perror_plus("seteuid");
1886
}
1887
goto end;
1888
}
1889
if((network.ifr_flags & IFF_UP) == 0){
1890
network.ifr_flags |= IFF_UP;
1891
take_down_interface = true;
1892
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1893
if(ret == -1){
1894
take_down_interface = false;
1895
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1896
exitcode = EX_OSERR;
1897
#ifdef __linux__
1898
if(restore_loglevel){
1899
ret = klogctl(7, NULL, 0);
1900
if(ret == -1){
1901
perror_plus("klogctl");
1902
}
1903
}
1904
#endif /* __linux__ */
1905
/* Lower privileges */
1906
errno = 0;
1907
ret = seteuid(uid);
1908
if(ret == -1){
1909
perror_plus("seteuid");
1910
}
1911
goto end;
1912
}
1913
}
1914
/* Sleep checking until interface is running.
1915
Check every 0.25s, up to total time of delay */
1916
for(int i=0; i < delay * 4; i++){
1917
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1918
if(ret == -1){
1919
perror_plus("ioctl SIOCGIFFLAGS");
1920
} else if(network.ifr_flags & IFF_RUNNING){
1921
break;
1922
}
1923
struct timespec sleeptime = { .tv_nsec = 250000000 };
1924
ret = nanosleep(&sleeptime, NULL);
1925
if(ret == -1 and errno != EINTR){
1926
perror_plus("nanosleep");
1927
}
1928
}
1929
if(not take_down_interface){
1930
/* We won't need the socket anymore */
1931
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1932
if(ret == -1){
1933
perror_plus("close");
1934
}
1935
}
1936
#ifdef __linux__
1937
if(restore_loglevel){
1938
/* Restores kernel loglevel to default */
1939
ret = klogctl(7, NULL, 0);
1940
if(ret == -1){
1941
perror_plus("klogctl");
1942
}
1943
}
1944
#endif /* __linux__ */
1945
/* Lower privileges */
1946
errno = 0;
1947
if(take_down_interface){
1948
/* Lower privileges */
1949
ret = seteuid(uid);
1950
if(ret == -1){
1951
perror_plus("seteuid");
1952
}
2294
1953
} else {
2295
if(ret == 0){
2296
free(direntries);
2297
}
2298
fprintf_plus(stderr, "Could not find a network interface\n");
2299
exitcode = EXIT_FAILURE;
2300
goto end;
2301
}
2302
}
2303
2304
/* Bring up interfaces which are down, and remove any "none"s */
2305
{
2306
char *interface = NULL;
2307
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2308
interface))){
2309
/* If interface name is "none", stop bringing up interfaces.
2310
Also remove all instances of "none" from the list */
2311
if(strcmp(interface, "none") == 0){
2312
argz_delete(&mc.interfaces, &mc.interfaces_size,
2313
interface);
2314
interface = NULL;
2315
while((interface = argz_next(mc.interfaces,
2316
mc.interfaces_size, interface))){
2317
if(strcmp(interface, "none") == 0){
2318
argz_delete(&mc.interfaces, &mc.interfaces_size,
2319
interface);
2320
interface = NULL;
2321
}
2322
}
2323
break;
2324
}
2325
bool interface_was_up = interface_is_up(interface);
2326
errno = bring_up_interface(interface, delay);
2327
if(not interface_was_up){
2328
if(errno != 0){
2329
perror_plus("Failed to bring up interface");
2330
} else {
2331
errno = argz_add(&interfaces_to_take_down,
2332
&interfaces_to_take_down_size,
2333
interface);
2334
if(errno != 0){
2335
perror_plus("argz_add");
2336
}
2337
}
2338
}
2339
}
2340
if(debug and (interfaces_to_take_down == NULL)){
2341
fprintf_plus(stderr, "No interfaces were brought up\n");
2342
}
2343
}
2344
2345
/* If we only got one interface, explicitly use only that one */
2346
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2347
if(debug){
2348
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2349
mc.interfaces);
2350
}
2351
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1954
/* Lower privileges permanently */
1955
ret = setuid(uid);
1956
if(ret == -1){
1957
perror_plus("setuid");
1958
}
1959
}
2352
1960
}
2353
1961
2354
1962
if(quit_now){
2355
1963
goto end;
2356
1964
}
2357
1965
2358
ret = init_gnutls_global(pubkey, seckey, &mc);
1966
ret = init_gnutls_global(pubkey, seckey);
2359
1967
if(ret == -1){
2360
1968
fprintf_plus(stderr, "init_gnutls_global failed\n");
2361
1969
exitcode = EX_UNAVAILABLE;
2368
1976
goto end;
2369
1977
}
2370
1978
2371
/* Try /run/tmp before /tmp */
2372
tempdir = mkdtemp(run_tempdir);
2373
if(tempdir == NULL and errno == ENOENT){
2374
if(debug){
2375
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2376
run_tempdir, old_tempdir);
2377
}
2378
tempdir = mkdtemp(old_tempdir);
2379
}
2380
if(tempdir == NULL){
1979
if(mkdtemp(tempdir) == NULL){
2381
1980
perror_plus("mkdtemp");
2382
1981
goto end;
2383
1982
}
1983
tempdir_created = true;
2384
1984
2385
1985
if(quit_now){
2386
1986
goto end;
2387
1987
}
2388
1988
2389
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
1989
if(not init_gpgme(pubkey, seckey, tempdir)){
2390
1990
fprintf_plus(stderr, "init_gpgme failed\n");
2391
1991
exitcode = EX_UNAVAILABLE;
2392
1992
goto end;
2402
2002
/* Connect directly, do not use Zeroconf */
2403
2003
/* (Mainly meant for debugging) */
2404
2004
char *address = strrchr(connect_to, ':');
2405
2406
2005
if(address == NULL){
2407
2006
fprintf_plus(stderr, "No colon in address\n");
2408
2007
exitcode = EX_USAGE;
2413
2012
goto end;
2414
2013
}
2415
2014
2416
in_port_t port;
2015
uint16_t port;
2417
2016
errno = 0;
2418
2017
tmpmax = strtoimax(address+1, &tmp, 10);
2419
2018
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2420
or tmpmax != (in_port_t)tmpmax){
2019
or tmpmax != (uint16_t)tmpmax){
2421
2020
fprintf_plus(stderr, "Bad port number\n");
2422
2021
exitcode = EX_USAGE;
2423
2022
goto end;
2424
2023
}
2425
2024
2426
2025
if(quit_now){
2427
2026
goto end;
2428
2027
}
2429
2028
2430
port = (in_port_t)tmpmax;
2029
port = (uint16_t)tmpmax;
2431
2030
*address = '\0';
2432
2031
/* Colon in address indicates IPv6 */
2433
2032
int af;
2449
2048
}
2450
2049
2451
2050
while(not quit_now){
2452
ret = start_mandos_communication(address, port, if_index, af,
2453
&mc);
2051
ret = start_mandos_communication(address, port, if_index, af);
2454
2052
if(quit_now or ret == 0){
2455
2053
break;
2456
2054
}
2457
2055
if(debug){
2458
fprintf_plus(stderr, "Retrying in %d seconds\n",
2459
(int)retry_interval);
2056
fprintf_plus(stderr, "Retrying in %d seconds\n", (int)retry_interval);
2460
2057
}
2461
sleep((unsigned int)retry_interval);
2058
sleep((int)retry_interval);
2462
2059
}
2463
2060
2464
if(not quit_now){
2061
if (not quit_now){
2465
2062
exitcode = EXIT_SUCCESS;
2466
2063
}
2467
2064
2482
2079
config.publish_domain = 0;
2483
2080
2484
2081
/* Allocate a new server */
2485
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2486
&config, NULL, NULL, &ret_errno);
2082
mc.server = avahi_server_new(avahi_simple_poll_get
2083
(mc.simple_poll), &config, NULL,
2084
NULL, &error);
2487
2085
2488
2086
/* Free the Avahi configuration data */
2489
2087
avahi_server_config_free(&config);
2492
2090
/* Check if creating the Avahi server object succeeded */
2493
2091
if(mc.server == NULL){
2494
2092
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2495
avahi_strerror(ret_errno));
2093
avahi_strerror(error));
2496
2094
exitcode = EX_UNAVAILABLE;
2497
2095
goto end;
2498
2096
}
2504
2102
/* Create the Avahi service browser */
2505
2103
sb = avahi_s_service_browser_new(mc.server, if_index,
2506
2104
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2507
NULL, 0, browse_callback,
2508
(void *)&mc);
2105
NULL, 0, browse_callback, NULL);
2509
2106
if(sb == NULL){
2510
2107
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2511
avahi_strerror(avahi_server_errno(mc.server)));
2108
avahi_strerror(avahi_server_errno(mc.server)));
2512
2109
exitcode = EX_UNAVAILABLE;
2513
2110
goto end;
2514
2111
}
2522
2119
if(debug){
2523
2120
fprintf_plus(stderr, "Starting Avahi loop search\n");
2524
2121
}
2525
2526
ret = avahi_loop_with_timeout(simple_poll,
2527
(int)(retry_interval * 1000), &mc);
2122
2123
ret = avahi_loop_with_timeout(mc.simple_poll,
2124
(int)(retry_interval * 1000));
2528
2125
if(debug){
2529
2126
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2530
(ret == 0) ? "successfully" : "with error");
2127
(ret == 0) ? "successfully" : "with error");
2531
2128
}
2532
2129
2533
2130
end:
2537
2134
}
2538
2135
2539
2136
/* Cleanup things */
2540
free(mc.interfaces);
2541
2542
2137
if(sb != NULL)
2543
2138
avahi_s_service_browser_free(sb);
2544
2139
2545
2140
if(mc.server != NULL)
2546
2141
avahi_server_free(mc.server);
2547
2142
2548
if(simple_poll != NULL)
2549
avahi_simple_poll_free(simple_poll);
2143
if(mc.simple_poll != NULL)
2144
avahi_simple_poll_free(mc.simple_poll);
2550
2145
2551
2146
if(gnutls_initialized){
2552
2147
gnutls_certificate_free_credentials(mc.cred);
2557
2152
if(gpgme_initialized){
2558
2153
gpgme_release(mc.ctx);
2559
2154
}
2560
2155
2561
2156
/* Cleans up the circular linked list of Mandos servers the client
2562
2157
has seen */
2563
2158
if(mc.current_server != NULL){
2564
2159
mc.current_server->prev->next = NULL;
2565
2160
while(mc.current_server != NULL){
2566
2161
server *next = mc.current_server->next;
2567
#ifdef __GNUC__
2568
#pragma GCC diagnostic push
2569
#pragma GCC diagnostic ignored "-Wcast-qual"
2570
#endif
2571
free((char *)(mc.current_server->ip));
2572
#ifdef __GNUC__
2573
#pragma GCC diagnostic pop
2574
#endif
2575
2162
free(mc.current_server);
2576
2163
mc.current_server = next;
2577
2164
}
2578
2165
}
2579
2166
2580
/* Re-raise privileges */
2581
{
2582
ret_errno = raise_privileges();
2583
if(ret_errno != 0){
2584
errno = ret_errno;
2585
perror_plus("Failed to raise privileges");
2586
} else {
2587
2588
/* Run network hooks */
2589
run_network_hooks("stop", interfaces_hooks != NULL ?
2590
interfaces_hooks : "", delay);
2591
2592
/* Take down the network interfaces which were brought up */
2593
{
2594
char *interface = NULL;
2595
while((interface=argz_next(interfaces_to_take_down,
2596
interfaces_to_take_down_size,
2597
interface))){
2598
ret_errno = take_down_interface(interface);
2599
if(ret_errno != 0){
2600
errno = ret_errno;
2601
perror_plus("Failed to take down interface");
2602
}
2603
}
2604
if(debug and (interfaces_to_take_down == NULL)){
2605
fprintf_plus(stderr, "No interfaces needed to be taken"
2606
" down\n");
2607
}
2608
}
2167
/* XXX run network hooks "stop" here */
2168
2169
/* Take down the network interface */
2170
if(take_down_interface){
2171
/* Re-raise priviliges */
2172
errno = 0;
2173
ret = seteuid(0);
2174
if(ret == -1){
2175
perror_plus("seteuid");
2609
2176
}
2610
2611
ret_errno = lower_privileges_permanently();
2612
if(ret_errno != 0){
2613
errno = ret_errno;
2614
perror_plus("Failed to lower privileges permanently");
2177
if(geteuid() == 0){
2178
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2179
if(ret == -1){
2180
perror_plus("ioctl SIOCGIFFLAGS");
2181
} else if(network.ifr_flags & IFF_UP){
2182
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2183
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2184
if(ret == -1){
2185
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2186
}
2187
}
2188
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2189
if(ret == -1){
2190
perror_plus("close");
2191
}
2192
/* Lower privileges permanently */
2193
errno = 0;
2194
ret = setuid(uid);
2195
if(ret == -1){
2196
perror_plus("setuid");
2197
}
2615
2198
}
2616
2199
}
2617
2200
2618
free(interfaces_to_take_down);
2619
free(interfaces_hooks);
2620
2621
2201
/* Removes the GPGME temp directory and all files inside */
2622
if(tempdir != NULL){
2202
if(tempdir_created){
2623
2203
struct dirent **direntries = NULL;
2624
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2625
O_NOFOLLOW));
2626
if(tempdir_fd == -1){
2627
perror_plus("open");
2628
} else {
2629
#ifdef __GLIBC__
2630
#if __GLIBC_PREREQ(2, 15)
2631
int numentries = scandirat(tempdir_fd, ".", &direntries,
2632
notdotentries, alphasort);
2633
#else /* not __GLIBC_PREREQ(2, 15) */
2634
int numentries = scandir(tempdir, &direntries, notdotentries,
2635
alphasort);
2636
#endif /* not __GLIBC_PREREQ(2, 15) */
2637
#else /* not __GLIBC__ */
2638
int numentries = scandir(tempdir, &direntries, notdotentries,
2639
alphasort);
2640
#endif /* not __GLIBC__ */
2641
if(numentries >= 0){
2642
for(int i = 0; i < numentries; i++){
2643
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2644
if(ret == -1){
2645
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2646
" \"%s\", 0): %s\n", tempdir,
2647
direntries[i]->d_name, strerror(errno));
2648
}
2649
free(direntries[i]);
2650
}
2651
2652
/* need to clean even if 0 because man page doesn't specify */
2653
free(direntries);
2654
if(numentries == -1){
2655
perror_plus("scandir");
2656
}
2657
ret = rmdir(tempdir);
2658
if(ret == -1 and errno != ENOENT){
2659
perror_plus("rmdir");
2660
}
2204
struct dirent *direntry = NULL;
2205
int numentries = scandir(tempdir, &direntries, notdotentries,
2206
alphasort);
2207
if (numentries > 0){
2208
for(int i = 0; i < numentries; i++){
2209
direntry = direntries[i];
2210
char *fullname = NULL;
2211
ret = asprintf(&fullname, "%s/%s", tempdir,
2212
direntry->d_name);
2213
if(ret < 0){
2214
perror_plus("asprintf");
2215
continue;
2216
}
2217
ret = remove(fullname);
2218
if(ret == -1){
2219
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname, strerror(errno));
2220
}
2221
free(fullname);
2661
2222
}
2662
TEMP_FAILURE_RETRY(close(tempdir_fd));
2223
}
2224
2225
/* need to clean even if 0 because man page doesn't specify */
2226
free(direntries);
2227
if (numentries == -1){
2228
perror_plus("scandir");
2229
}
2230
ret = rmdir(tempdir);
2231
if(ret == -1 and errno != ENOENT){
2232
perror_plus("rmdir");
2663
2233
}
2664
2234
}
2665
2235
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0