(root)/mandos/release
» Revision
237.16.2
(compared to revision 237.7.320)
: plugins.d/mandos-client.c
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- Committer: teddy at bsnet
- Date: 2011-11-11 20:19:01 UTC
- mto: (237.15.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@fukt.bsnet.se-20111111201901-a92of11prspld20x
* plugins.d/mandos-client.c (main): Add "DELAY" environment variable.
Check return value from setenv().
Check return value from setenv().
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- plugin-helpers
- 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 © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 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,
86
85
raise() */
87
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
88
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
89
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
90
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
88
99
89
#ifdef __linux__
100
90
#include <sys/klog.h> /* klogctl() */
118
108
init_gnutls_session(),
119
109
GNUTLS_* */
120
110
#include <gnutls/openpgp.h>
121
/* gnutls_certificate_set_openpgp_key_file(),
122
GNUTLS_OPENPGP_FMT_BASE64 */
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
123
113
124
114
/* GPGME */
125
115
#include <gpgme.h> /* All GPGME types, constants and
141
131
const char *argp_program_bug_address = "<mandos@recompile.se>";
142
132
static const char sys_class_net[] = "/sys/class/net";
143
133
char *connect_to = NULL;
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
uid_t uid = 65534;
147
gid_t gid = 65534;
148
134
149
135
/* Doubly linked list that need to be circularly linked when used */
150
136
typedef struct server{
151
137
const char *ip;
152
in_port_t port;
138
uint16_t port;
153
139
AvahiIfIndex if_index;
154
140
int af;
155
141
struct timespec last_seen;
159
145
160
146
/* Used for passing in values through the Avahi callback functions */
161
147
typedef struct {
148
AvahiSimplePoll *simple_poll;
162
149
AvahiServer *server;
163
150
gnutls_certificate_credentials_t cred;
164
151
unsigned int dh_bits;
166
153
const char *priority;
167
154
gpgme_ctx_t ctx;
168
155
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
171
156
} mandos_context;
172
157
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
158
/* global context so signal handler can reach it*/
159
mandos_context mc = { .simple_poll = NULL, .server = NULL,
160
.dh_bits = 1024, .priority = "SECURE256"
161
":!CTYPE-X.509:+CTYPE-OPENPGP",
162
.current_server = NULL };
175
163
176
164
sig_atomic_t quit_now = 0;
177
165
int signal_received = 0;
178
166
179
167
/* Function to use when printing errors */
180
168
void perror_plus(const char *print_text){
181
int e = errno;
182
169
fprintf(stderr, "Mandos plugin %s: ",
183
170
program_invocation_short_name);
184
errno = e;
185
171
perror(print_text);
186
172
}
187
173
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
189
int fprintf_plus(FILE *stream, const char *format, ...){
190
va_list ap;
191
va_start (ap, format);
192
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
}
197
198
174
/*
199
175
* Make additional room in "buffer" for at least BUFFER_SIZE more
200
176
* bytes. "buffer_capacity" is how much is currently allocated,
201
177
* "buffer_length" is how much is already used.
202
178
*/
203
__attribute__((nonnull, warn_unused_result))
204
179
size_t incbuffer(char **buffer, size_t buffer_length,
205
size_t buffer_capacity){
180
size_t buffer_capacity){
206
181
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;
182
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
183
if(buffer == NULL){
213
184
return 0;
214
185
}
215
*buffer = new_buf;
216
186
buffer_capacity += BUFFER_SIZE;
217
187
}
218
188
return buffer_capacity;
219
189
}
220
190
221
191
/* 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){
192
int add_server(const char *ip, uint16_t port,
193
AvahiIfIndex if_index,
194
int af){
225
195
int ret;
226
196
server *new_server = malloc(sizeof(server));
227
197
if(new_server == NULL){
228
198
perror_plus("malloc");
229
return false;
199
return -1;
230
200
}
231
201
*new_server = (server){ .ip = strdup(ip),
232
.port = port,
233
.if_index = if_index,
234
.af = af };
202
.port = port,
203
.if_index = if_index,
204
.af = af };
235
205
if(new_server->ip == NULL){
236
206
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;
207
return -1;
253
208
}
254
209
/* Special case of first server */
255
if(*current_server == NULL){
210
if (mc.current_server == NULL){
256
211
new_server->next = new_server;
257
212
new_server->prev = new_server;
258
*current_server = new_server;
213
mc.current_server = new_server;
214
/* Place the new server last in the list */
259
215
} else {
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
216
new_server->next = mc.current_server;
217
new_server->prev = mc.current_server->prev;
263
218
new_server->prev->next = new_server;
264
(*current_server)->prev = new_server;
265
}
266
return true;
219
mc.current_server->prev = new_server;
220
}
221
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
if(ret == -1){
223
perror_plus("clock_gettime");
224
return -1;
225
}
226
return 0;
267
227
}
268
228
269
229
/*
270
230
* Initialize GPGME.
271
231
*/
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){
232
static bool init_gpgme(const char *seckey,
233
const char *pubkey, const char *tempdir){
277
234
gpgme_error_t rc;
278
235
gpgme_engine_info_t engine_info;
279
236
237
280
238
/*
281
239
* Helper function to insert pub and seckey to the engine keyring.
282
240
*/
283
bool import_key(const char * const filename){
241
bool import_key(const char *filename){
284
242
int ret;
285
243
int fd;
286
244
gpgme_data_t pgp_data;
293
251
294
252
rc = gpgme_data_new_from_fd(&pgp_data, fd);
295
253
if(rc != GPG_ERR_NO_ERROR){
296
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
297
gpgme_strsource(rc), gpgme_strerror(rc));
254
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
255
gpgme_strsource(rc), gpgme_strerror(rc));
298
256
return false;
299
257
}
300
258
301
rc = gpgme_op_import(mc->ctx, pgp_data);
259
rc = gpgme_op_import(mc.ctx, pgp_data);
302
260
if(rc != GPG_ERR_NO_ERROR){
303
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
304
gpgme_strsource(rc), gpgme_strerror(rc));
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
305
263
return false;
306
264
}
307
265
314
272
}
315
273
316
274
if(debug){
317
fprintf_plus(stderr, "Initializing GPGME\n");
275
fprintf(stderr, "Initializing GPGME\n");
318
276
}
319
277
320
278
/* Init GPGME */
321
279
gpgme_check_version(NULL);
322
280
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
323
281
if(rc != GPG_ERR_NO_ERROR){
324
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
325
gpgme_strsource(rc), gpgme_strerror(rc));
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
326
284
return false;
327
285
}
328
286
329
287
/* Set GPGME home directory for the OpenPGP engine only */
330
288
rc = gpgme_get_engine_info(&engine_info);
331
289
if(rc != GPG_ERR_NO_ERROR){
332
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
333
gpgme_strsource(rc), gpgme_strerror(rc));
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
334
292
return false;
335
293
}
336
294
while(engine_info != NULL){
342
300
engine_info = engine_info->next;
343
301
}
344
302
if(engine_info == NULL){
345
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
346
tempdir);
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
347
304
return false;
348
305
}
349
306
350
307
/* Create new GPGME "context" */
351
rc = gpgme_new(&(mc->ctx));
308
rc = gpgme_new(&(mc.ctx));
352
309
if(rc != GPG_ERR_NO_ERROR){
353
fprintf_plus(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
355
gpgme_strerror(rc));
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
356
312
return false;
357
313
}
358
314
367
323
* Decrypt OpenPGP data.
368
324
* Returns -1 on error
369
325
*/
370
__attribute__((nonnull, warn_unused_result))
371
326
static ssize_t pgp_packet_decrypt(const char *cryptotext,
372
327
size_t crypto_size,
373
char **plaintext,
374
mandos_context *mc){
328
char **plaintext){
375
329
gpgme_data_t dh_crypto, dh_plain;
376
330
gpgme_error_t rc;
377
331
ssize_t ret;
379
333
ssize_t plaintext_length = 0;
380
334
381
335
if(debug){
382
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
383
337
}
384
338
385
339
/* Create new GPGME data buffer from memory cryptotext */
386
340
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
387
341
0);
388
342
if(rc != GPG_ERR_NO_ERROR){
389
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
390
gpgme_strsource(rc), gpgme_strerror(rc));
343
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
344
gpgme_strsource(rc), gpgme_strerror(rc));
391
345
return -1;
392
346
}
393
347
394
348
/* Create new empty GPGME data buffer for the plaintext */
395
349
rc = gpgme_data_new(&dh_plain);
396
350
if(rc != GPG_ERR_NO_ERROR){
397
fprintf_plus(stderr, "Mandos plugin mandos-client: "
398
"bad gpgme_data_new: %s: %s\n",
399
gpgme_strsource(rc), gpgme_strerror(rc));
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
400
353
gpgme_data_release(dh_crypto);
401
354
return -1;
402
355
}
403
356
404
357
/* Decrypt data from the cryptotext data buffer to the plaintext
405
358
data buffer */
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
359
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
407
360
if(rc != GPG_ERR_NO_ERROR){
408
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
409
gpgme_strsource(rc), gpgme_strerror(rc));
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
410
363
plaintext_length = -1;
411
364
if(debug){
412
365
gpgme_decrypt_result_t result;
413
result = gpgme_op_decrypt_result(mc->ctx);
366
result = gpgme_op_decrypt_result(mc.ctx);
414
367
if(result == NULL){
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
416
369
} else {
417
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
418
result->unsupported_algorithm);
419
fprintf_plus(stderr, "Wrong key usage: %u\n",
420
result->wrong_key_usage);
370
fprintf(stderr, "Unsupported algorithm: %s\n",
371
result->unsupported_algorithm);
372
fprintf(stderr, "Wrong key usage: %u\n",
373
result->wrong_key_usage);
421
374
if(result->file_name != NULL){
422
fprintf_plus(stderr, "File name: %s\n", result->file_name);
375
fprintf(stderr, "File name: %s\n", result->file_name);
423
376
}
424
377
gpgme_recipient_t recipient;
425
378
recipient = result->recipients;
426
379
while(recipient != NULL){
427
fprintf_plus(stderr, "Public key algorithm: %s\n",
428
gpgme_pubkey_algo_name
429
(recipient->pubkey_algo));
430
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
431
fprintf_plus(stderr, "Secret key available: %s\n",
432
recipient->status == GPG_ERR_NO_SECKEY
433
? "No" : "Yes");
380
fprintf(stderr, "Public key algorithm: %s\n",
381
gpgme_pubkey_algo_name(recipient->pubkey_algo));
382
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
383
fprintf(stderr, "Secret key available: %s\n",
384
recipient->status == GPG_ERR_NO_SECKEY
385
? "No" : "Yes");
434
386
recipient = recipient->next;
435
387
}
436
388
}
439
391
}
440
392
441
393
if(debug){
442
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
394
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
443
395
}
444
396
445
397
/* Seek back to the beginning of the GPGME plaintext data buffer */
452
404
*plaintext = NULL;
453
405
while(true){
454
406
plaintext_capacity = incbuffer(plaintext,
455
(size_t)plaintext_length,
456
plaintext_capacity);
407
(size_t)plaintext_length,
408
plaintext_capacity);
457
409
if(plaintext_capacity == 0){
458
perror_plus("incbuffer");
459
plaintext_length = -1;
460
goto decrypt_end;
410
perror_plus("incbuffer");
411
plaintext_length = -1;
412
goto decrypt_end;
461
413
}
462
414
463
415
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
476
428
}
477
429
478
430
if(debug){
479
fprintf_plus(stderr, "Decrypted password is: ");
431
fprintf(stderr, "Decrypted password is: ");
480
432
for(ssize_t i = 0; i < plaintext_length; i++){
481
433
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
482
434
}
493
445
return plaintext_length;
494
446
}
495
447
496
__attribute__((warn_unused_result, const))
497
static const char *safe_string(const char *str){
498
if(str == NULL)
499
return "(unknown)";
500
return str;
501
}
502
503
__attribute__((warn_unused_result))
504
static const char *safer_gnutls_strerror(int value){
505
const char *ret = gnutls_strerror(value);
506
return safe_string(ret);
448
static const char * safer_gnutls_strerror(int value){
449
const char *ret = gnutls_strerror(value); /* Spurious warning from
450
-Wunreachable-code */
451
if(ret == NULL)
452
ret = "(unknown)";
453
return ret;
507
454
}
508
455
509
456
/* GnuTLS log function callback */
510
__attribute__((nonnull))
511
457
static void debuggnutls(__attribute__((unused)) int level,
512
458
const char* string){
513
fprintf_plus(stderr, "GnuTLS: %s", string);
459
fprintf(stderr, "GnuTLS: %s", string);
514
460
}
515
461
516
__attribute__((nonnull, warn_unused_result))
517
462
static int init_gnutls_global(const char *pubkeyfilename,
518
const char *seckeyfilename,
519
const char *dhparamsfilename,
520
mandos_context *mc){
463
const char *seckeyfilename){
521
464
int ret;
522
unsigned int uret;
523
465
524
466
if(debug){
525
fprintf_plus(stderr, "Initializing GnuTLS\n");
467
fprintf(stderr, "Initializing GnuTLS\n");
526
468
}
527
469
528
470
ret = gnutls_global_init();
529
471
if(ret != GNUTLS_E_SUCCESS){
530
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
531
safer_gnutls_strerror(ret));
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
532
474
return -1;
533
475
}
534
476
541
483
}
542
484
543
485
/* OpenPGP credentials */
544
ret = gnutls_certificate_allocate_credentials(&mc->cred);
486
ret = gnutls_certificate_allocate_credentials(&mc.cred);
545
487
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
547
safer_gnutls_strerror(ret));
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
548
490
gnutls_global_deinit();
549
491
return -1;
550
492
}
551
493
552
494
if(debug){
553
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
554
" secret key %s as GnuTLS credentials\n",
555
pubkeyfilename,
556
seckeyfilename);
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
497
seckeyfilename);
557
498
}
558
499
559
500
ret = gnutls_certificate_set_openpgp_key_file
560
(mc->cred, pubkeyfilename, seckeyfilename,
501
(mc.cred, pubkeyfilename, seckeyfilename,
561
502
GNUTLS_OPENPGP_FMT_BASE64);
562
503
if(ret != GNUTLS_E_SUCCESS){
563
fprintf_plus(stderr,
564
"Error[%d] while reading the OpenPGP key pair ('%s',"
565
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
566
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
567
safer_gnutls_strerror(ret));
504
fprintf(stderr,
505
"Error[%d] while reading the OpenPGP key pair ('%s',"
506
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
507
fprintf(stderr, "The GnuTLS error is: %s\n",
508
safer_gnutls_strerror(ret));
568
509
goto globalfail;
569
510
}
570
511
571
512
/* GnuTLS server initialization */
572
ret = gnutls_dh_params_init(&mc->dh_params);
573
if(ret != GNUTLS_E_SUCCESS){
574
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
575
" initialization: %s\n",
576
safer_gnutls_strerror(ret));
577
goto globalfail;
578
}
579
/* If a Diffie-Hellman parameters file was given, try to use it */
580
if(dhparamsfilename != NULL){
581
gnutls_datum_t params = { .data = NULL, .size = 0 };
582
do {
583
int dhpfile = open(dhparamsfilename, O_RDONLY);
584
if(dhpfile == -1){
585
perror_plus("open");
586
dhparamsfilename = NULL;
587
break;
588
}
589
size_t params_capacity = 0;
590
while(true){
591
params_capacity = incbuffer((char **)¶ms.data,
592
(size_t)params.size,
593
(size_t)params_capacity);
594
if(params_capacity == 0){
595
perror_plus("incbuffer");
596
free(params.data);
597
params.data = NULL;
598
dhparamsfilename = NULL;
599
break;
600
}
601
ssize_t bytes_read = read(dhpfile,
602
params.data + params.size,
603
BUFFER_SIZE);
604
/* EOF */
605
if(bytes_read == 0){
606
break;
607
}
608
/* check bytes_read for failure */
609
if(bytes_read < 0){
610
perror_plus("read");
611
free(params.data);
612
params.data = NULL;
613
dhparamsfilename = NULL;
614
break;
615
}
616
params.size += (unsigned int)bytes_read;
617
}
618
if(params.data == NULL){
619
dhparamsfilename = NULL;
620
}
621
if(dhparamsfilename == NULL){
622
break;
623
}
624
ret = gnutls_dh_params_import_pkcs3(mc->dh_params, ¶ms,
625
GNUTLS_X509_FMT_PEM);
626
if(ret != GNUTLS_E_SUCCESS){
627
fprintf_plus(stderr, "Failed to parse DH parameters in file"
628
" \"%s\": %s\n", dhparamsfilename,
629
safer_gnutls_strerror(ret));
630
dhparamsfilename = NULL;
631
}
632
} while(false);
633
}
634
if(dhparamsfilename == NULL){
635
if(mc->dh_bits == 0){
636
/* Find out the optimal number of DH bits */
637
/* Try to read the private key file */
638
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
639
do {
640
int secfile = open(seckeyfilename, O_RDONLY);
641
if(secfile == -1){
642
perror_plus("open");
643
break;
644
}
645
size_t buffer_capacity = 0;
646
while(true){
647
buffer_capacity = incbuffer((char **)&buffer.data,
648
(size_t)buffer.size,
649
(size_t)buffer_capacity);
650
if(buffer_capacity == 0){
651
perror_plus("incbuffer");
652
free(buffer.data);
653
buffer.data = NULL;
654
break;
655
}
656
ssize_t bytes_read = read(secfile,
657
buffer.data + buffer.size,
658
BUFFER_SIZE);
659
/* EOF */
660
if(bytes_read == 0){
661
break;
662
}
663
/* check bytes_read for failure */
664
if(bytes_read < 0){
665
perror_plus("read");
666
free(buffer.data);
667
buffer.data = NULL;
668
break;
669
}
670
buffer.size += (unsigned int)bytes_read;
671
}
672
close(secfile);
673
} while(false);
674
/* If successful, use buffer to parse private key */
675
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
676
if(buffer.data != NULL){
677
{
678
gnutls_openpgp_privkey_t privkey = NULL;
679
ret = gnutls_openpgp_privkey_init(&privkey);
680
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error initializing OpenPGP key"
682
" structure: %s",
683
safer_gnutls_strerror(ret));
684
free(buffer.data);
685
buffer.data = NULL;
686
} else {
687
ret = gnutls_openpgp_privkey_import
688
(privkey, &buffer, GNUTLS_OPENPGP_FMT_BASE64, "", 0);
689
if(ret != GNUTLS_E_SUCCESS){
690
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
691
safer_gnutls_strerror(ret));
692
privkey = NULL;
693
}
694
free(buffer.data);
695
buffer.data = NULL;
696
if(privkey != NULL){
697
/* Use private key to suggest an appropriate
698
sec_param */
699
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
700
gnutls_openpgp_privkey_deinit(privkey);
701
if(debug){
702
fprintf_plus(stderr, "This OpenPGP key implies using"
703
" a GnuTLS security parameter \"%s\".\n",
704
safe_string(gnutls_sec_param_get_name
705
(sec_param)));
706
}
707
}
708
}
709
}
710
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
711
/* Err on the side of caution */
712
sec_param = GNUTLS_SEC_PARAM_ULTRA;
713
if(debug){
714
fprintf_plus(stderr, "Falling back to security parameter"
715
" \"%s\"\n",
716
safe_string(gnutls_sec_param_get_name
717
(sec_param)));
718
}
719
}
720
}
721
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
722
if(uret != 0){
723
mc->dh_bits = uret;
724
if(debug){
725
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
726
" implies %u DH bits; using that.\n",
727
safe_string(gnutls_sec_param_get_name
728
(sec_param)),
729
mc->dh_bits);
730
}
731
} else {
732
fprintf_plus(stderr, "Failed to get implied number of DH"
733
" bits for security parameter \"%s\"): %s\n",
734
safe_string(gnutls_sec_param_get_name
735
(sec_param)),
736
safer_gnutls_strerror(ret));
737
goto globalfail;
738
}
739
} else if(debug){
740
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
741
mc->dh_bits);
742
}
743
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
744
if(ret != GNUTLS_E_SUCCESS){
745
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u"
746
" bits): %s\n", mc->dh_bits,
747
safer_gnutls_strerror(ret));
748
goto globalfail;
749
}
750
}
751
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
513
ret = gnutls_dh_params_init(&mc.dh_params);
514
if(ret != GNUTLS_E_SUCCESS){
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
517
goto globalfail;
518
}
519
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
520
if(ret != GNUTLS_E_SUCCESS){
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
523
goto globalfail;
524
}
525
526
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
752
527
753
528
return 0;
754
529
755
530
globalfail:
756
531
757
gnutls_certificate_free_credentials(mc->cred);
532
gnutls_certificate_free_credentials(mc.cred);
758
533
gnutls_global_deinit();
759
gnutls_dh_params_deinit(mc->dh_params);
534
gnutls_dh_params_deinit(mc.dh_params);
760
535
return -1;
761
536
}
762
537
763
__attribute__((nonnull, warn_unused_result))
764
static int init_gnutls_session(gnutls_session_t *session,
765
mandos_context *mc){
538
static int init_gnutls_session(gnutls_session_t *session){
766
539
int ret;
767
540
/* GnuTLS session creation */
768
541
do {
772
545
}
773
546
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
774
547
if(ret != GNUTLS_E_SUCCESS){
775
fprintf_plus(stderr,
776
"Error in GnuTLS session initialization: %s\n",
777
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
549
safer_gnutls_strerror(ret));
778
550
}
779
551
780
552
{
781
553
const char *err;
782
554
do {
783
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
555
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
784
556
if(quit_now){
785
557
gnutls_deinit(*session);
786
558
return -1;
787
559
}
788
560
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
789
561
if(ret != GNUTLS_E_SUCCESS){
790
fprintf_plus(stderr, "Syntax error at: %s\n", err);
791
fprintf_plus(stderr, "GnuTLS error: %s\n",
792
safer_gnutls_strerror(ret));
562
fprintf(stderr, "Syntax error at: %s\n", err);
563
fprintf(stderr, "GnuTLS error: %s\n",
564
safer_gnutls_strerror(ret));
793
565
gnutls_deinit(*session);
794
566
return -1;
795
567
}
797
569
798
570
do {
799
571
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
800
mc->cred);
572
mc.cred);
801
573
if(quit_now){
802
574
gnutls_deinit(*session);
803
575
return -1;
804
576
}
805
577
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
806
578
if(ret != GNUTLS_E_SUCCESS){
807
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
808
safer_gnutls_strerror(ret));
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
809
581
gnutls_deinit(*session);
810
582
return -1;
811
583
}
813
585
/* ignore client certificate if any. */
814
586
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
815
587
588
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
589
816
590
return 0;
817
591
}
818
592
820
594
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
821
595
__attribute__((unused)) const char *txt){}
822
596
823
/* Set effective uid to 0, return errno */
824
__attribute__((warn_unused_result))
825
error_t raise_privileges(void){
826
error_t old_errno = errno;
827
error_t ret_errno = 0;
828
if(seteuid(0) == -1){
829
ret_errno = errno;
830
}
831
errno = old_errno;
832
return ret_errno;
833
}
834
835
/* Set effective and real user ID to 0. Return errno. */
836
__attribute__((warn_unused_result))
837
error_t raise_privileges_permanently(void){
838
error_t old_errno = errno;
839
error_t ret_errno = raise_privileges();
840
if(ret_errno != 0){
841
errno = old_errno;
842
return ret_errno;
843
}
844
if(setuid(0) == -1){
845
ret_errno = errno;
846
}
847
errno = old_errno;
848
return ret_errno;
849
}
850
851
/* Set effective user ID to unprivileged saved user ID */
852
__attribute__((warn_unused_result))
853
error_t lower_privileges(void){
854
error_t old_errno = errno;
855
error_t ret_errno = 0;
856
if(seteuid(uid) == -1){
857
ret_errno = errno;
858
}
859
errno = old_errno;
860
return ret_errno;
861
}
862
863
/* Lower privileges permanently */
864
__attribute__((warn_unused_result))
865
error_t lower_privileges_permanently(void){
866
error_t old_errno = errno;
867
error_t ret_errno = 0;
868
if(setuid(uid) == -1){
869
ret_errno = errno;
870
}
871
errno = old_errno;
872
return ret_errno;
873
}
874
875
/* Helper function to add_local_route() and delete_local_route() */
876
__attribute__((nonnull, warn_unused_result))
877
static bool add_delete_local_route(const bool add,
878
const char *address,
879
AvahiIfIndex if_index){
880
int ret;
881
char helper[] = "mandos-client-iprouteadddel";
882
char add_arg[] = "add";
883
char delete_arg[] = "delete";
884
char debug_flag[] = "--debug";
885
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
886
if(pluginhelperdir == NULL){
887
if(debug){
888
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
889
" variable not set; cannot run helper\n");
890
}
891
return false;
892
}
893
894
char interface[IF_NAMESIZE];
895
if(if_indextoname((unsigned int)if_index, interface) == NULL){
896
perror_plus("if_indextoname");
897
return false;
898
}
899
900
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
901
if(devnull == -1){
902
perror_plus("open(\"/dev/null\", O_RDONLY)");
903
return false;
904
}
905
pid_t pid = fork();
906
if(pid == 0){
907
/* Child */
908
/* Raise privileges */
909
errno = raise_privileges_permanently();
910
if(errno != 0){
911
perror_plus("Failed to raise privileges");
912
/* _exit(EX_NOPERM); */
913
} else {
914
/* Set group */
915
errno = 0;
916
ret = setgid(0);
917
if(ret == -1){
918
perror_plus("setgid");
919
_exit(EX_NOPERM);
920
}
921
/* Reset supplementary groups */
922
errno = 0;
923
ret = setgroups(0, NULL);
924
if(ret == -1){
925
perror_plus("setgroups");
926
_exit(EX_NOPERM);
927
}
928
}
929
ret = dup2(devnull, STDIN_FILENO);
930
if(ret == -1){
931
perror_plus("dup2(devnull, STDIN_FILENO)");
932
_exit(EX_OSERR);
933
}
934
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
935
if(ret == -1){
936
perror_plus("close");
937
_exit(EX_OSERR);
938
}
939
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
940
if(ret == -1){
941
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
942
_exit(EX_OSERR);
943
}
944
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
945
O_RDONLY
946
| O_DIRECTORY
947
| O_PATH
948
| O_CLOEXEC));
949
if(helperdir_fd == -1){
950
perror_plus("open");
951
_exit(EX_UNAVAILABLE);
952
}
953
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
954
helper, O_RDONLY));
955
if(helper_fd == -1){
956
perror_plus("openat");
957
_exit(EX_UNAVAILABLE);
958
}
959
TEMP_FAILURE_RETRY(close(helperdir_fd));
960
#ifdef __GNUC__
961
#pragma GCC diagnostic push
962
#pragma GCC diagnostic ignored "-Wcast-qual"
963
#endif
964
if(fexecve(helper_fd, (char *const [])
965
{ helper, add ? add_arg : delete_arg, (char *)address,
966
interface, debug ? debug_flag : NULL, NULL },
967
environ) == -1){
968
#ifdef __GNUC__
969
#pragma GCC diagnostic pop
970
#endif
971
perror_plus("fexecve");
972
_exit(EXIT_FAILURE);
973
}
974
}
975
if(pid == -1){
976
perror_plus("fork");
977
return false;
978
}
979
int status;
980
pid_t pret = -1;
981
errno = 0;
982
do {
983
pret = waitpid(pid, &status, 0);
984
if(pret == -1 and errno == EINTR and quit_now){
985
int errno_raising = 0;
986
if((errno = raise_privileges()) != 0){
987
errno_raising = errno;
988
perror_plus("Failed to raise privileges in order to"
989
" kill helper program");
990
}
991
if(kill(pid, SIGTERM) == -1){
992
perror_plus("kill");
993
}
994
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
995
perror_plus("Failed to lower privileges after killing"
996
" helper program");
997
}
998
return false;
999
}
1000
} while(pret == -1 and errno == EINTR);
1001
if(pret == -1){
1002
perror_plus("waitpid");
1003
return false;
1004
}
1005
if(WIFEXITED(status)){
1006
if(WEXITSTATUS(status) != 0){
1007
fprintf_plus(stderr, "Error: iprouteadddel exited"
1008
" with status %d\n", WEXITSTATUS(status));
1009
return false;
1010
}
1011
return true;
1012
}
1013
if(WIFSIGNALED(status)){
1014
fprintf_plus(stderr, "Error: iprouteadddel died by"
1015
" signal %d\n", WTERMSIG(status));
1016
return false;
1017
}
1018
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
1019
return false;
1020
}
1021
1022
__attribute__((nonnull, warn_unused_result))
1023
static bool add_local_route(const char *address,
1024
AvahiIfIndex if_index){
1025
if(debug){
1026
fprintf_plus(stderr, "Adding route to %s\n", address);
1027
}
1028
return add_delete_local_route(true, address, if_index);
1029
}
1030
1031
__attribute__((nonnull, warn_unused_result))
1032
static bool delete_local_route(const char *address,
1033
AvahiIfIndex if_index){
1034
if(debug){
1035
fprintf_plus(stderr, "Removing route to %s\n", address);
1036
}
1037
return add_delete_local_route(false, address, if_index);
1038
}
1039
1040
597
/* Called when a Mandos server is found */
1041
__attribute__((nonnull, warn_unused_result))
1042
static int start_mandos_communication(const char *ip, in_port_t port,
598
static int start_mandos_communication(const char *ip, uint16_t port,
1043
599
AvahiIfIndex if_index,
1044
int af, mandos_context *mc){
600
int af){
1045
601
int ret, tcp_sd = -1;
1046
602
ssize_t sret;
1047
struct sockaddr_storage to;
603
union {
604
struct sockaddr_in in;
605
struct sockaddr_in6 in6;
606
} to;
1048
607
char *buffer = NULL;
1049
608
char *decrypted_buffer = NULL;
1050
609
size_t buffer_length = 0;
1053
612
int retval = -1;
1054
613
gnutls_session_t session;
1055
614
int pf; /* Protocol family */
1056
bool route_added = false;
1057
615
1058
616
errno = 0;
1059
617
1070
628
pf = PF_INET;
1071
629
break;
1072
630
default:
1073
fprintf_plus(stderr, "Bad address family: %d\n", af);
631
fprintf(stderr, "Bad address family: %d\n", af);
1074
632
errno = EINVAL;
1075
633
return -1;
1076
634
}
1077
635
1078
/* If the interface is specified and we have a list of interfaces */
1079
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
1080
/* Check if the interface is one of the interfaces we are using */
1081
bool match = false;
1082
{
1083
char *interface = NULL;
1084
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
1085
interface))){
1086
if(if_nametoindex(interface) == (unsigned int)if_index){
1087
match = true;
1088
break;
1089
}
1090
}
1091
}
1092
if(not match){
1093
/* This interface does not match any in the list, so we don't
1094
connect to the server */
1095
if(debug){
1096
char interface[IF_NAMESIZE];
1097
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1098
perror_plus("if_indextoname");
1099
} else {
1100
fprintf_plus(stderr, "Skipping server on non-used interface"
1101
" \"%s\"\n",
1102
if_indextoname((unsigned int)if_index,
1103
interface));
1104
}
1105
}
1106
return -1;
1107
}
1108
}
1109
1110
ret = init_gnutls_session(&session, mc);
636
ret = init_gnutls_session(&session);
1111
637
if(ret != 0){
1112
638
return -1;
1113
639
}
1114
640
1115
641
if(debug){
1116
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
1117
PRIuMAX "\n", ip, (uintmax_t)port);
642
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
643
"\n", ip, port);
1118
644
}
1119
645
1120
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
646
tcp_sd = socket(pf, SOCK_STREAM, 0);
1121
647
if(tcp_sd < 0){
1122
648
int e = errno;
1123
649
perror_plus("socket");
1132
658
1133
659
memset(&to, 0, sizeof(to));
1134
660
if(af == AF_INET6){
1135
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
1136
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
661
to.in6.sin6_family = (sa_family_t)af;
662
ret = inet_pton(af, ip, &to.in6.sin6_addr);
1137
663
} else { /* IPv4 */
1138
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
1139
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
664
to.in.sin_family = (sa_family_t)af;
665
ret = inet_pton(af, ip, &to.in.sin_addr);
1140
666
}
1141
667
if(ret < 0 ){
1142
668
int e = errno;
1146
672
}
1147
673
if(ret == 0){
1148
674
int e = errno;
1149
fprintf_plus(stderr, "Bad address: %s\n", ip);
675
fprintf(stderr, "Bad address: %s\n", ip);
1150
676
errno = e;
1151
677
goto mandos_end;
1152
678
}
1153
679
if(af == AF_INET6){
1154
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
1155
if(IN6_IS_ADDR_LINKLOCAL
1156
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
680
to.in6.sin6_port = htons(port); /* Spurious warnings from
681
-Wconversion and
682
-Wunreachable-code */
683
684
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
685
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
686
-Wunreachable-code*/
1157
687
if(if_index == AVAHI_IF_UNSPEC){
1158
fprintf_plus(stderr, "An IPv6 link-local address is"
1159
" incomplete without a network interface\n");
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
1160
690
errno = EINVAL;
1161
691
goto mandos_end;
1162
692
}
1163
693
/* Set the network interface number as scope */
1164
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
694
to.in6.sin6_scope_id = (uint32_t)if_index;
1165
695
}
1166
696
} else {
1167
((struct sockaddr_in *)&to)->sin_port = htons(port);
697
to.in.sin_port = htons(port); /* Spurious warnings from
698
-Wconversion and
699
-Wunreachable-code */
1168
700
}
1169
701
1170
702
if(quit_now){
1178
710
if(if_indextoname((unsigned int)if_index, interface) == NULL){
1179
711
perror_plus("if_indextoname");
1180
712
} else {
1181
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
1182
"\n", ip, interface, (uintmax_t)port);
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
1183
715
}
1184
716
} else {
1185
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
1186
ip, (uintmax_t)port);
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
718
port);
1187
719
}
1188
720
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
1189
721
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1190
if(af == AF_INET6){
1191
ret = getnameinfo((struct sockaddr *)&to,
1192
sizeof(struct sockaddr_in6),
1193
addrstr, sizeof(addrstr), NULL, 0,
1194
NI_NUMERICHOST);
1195
} else {
1196
ret = getnameinfo((struct sockaddr *)&to,
1197
sizeof(struct sockaddr_in),
1198
addrstr, sizeof(addrstr), NULL, 0,
1199
NI_NUMERICHOST);
1200
}
1201
if(ret == EAI_SYSTEM){
1202
perror_plus("getnameinfo");
1203
} else if(ret != 0) {
1204
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
1205
} else if(strcmp(addrstr, ip) != 0){
1206
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1207
}
1208
}
1209
1210
if(quit_now){
1211
errno = EINTR;
1212
goto mandos_end;
1213
}
1214
1215
while(true){
1216
if(af == AF_INET6){
1217
ret = connect(tcp_sd, (struct sockaddr *)&to,
1218
sizeof(struct sockaddr_in6));
1219
} else {
1220
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1221
sizeof(struct sockaddr_in));
1222
}
1223
if(ret < 0){
1224
if(errno == ENETUNREACH
1225
and if_index != AVAHI_IF_UNSPEC
1226
and connect_to == NULL
1227
and not route_added and
1228
((af == AF_INET6 and not
1229
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1230
&to)->sin6_addr)))
1231
or (af == AF_INET and
1232
/* Not a a IPv4LL address */
1233
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1234
& 0xFFFF0000L) != 0xA9FE0000L))){
1235
/* Work around Avahi bug - Avahi does not announce link-local
1236
addresses if it has a global address, so local hosts with
1237
*only* a link-local address (e.g. Mandos clients) cannot
1238
connect to a Mandos server announced by Avahi on a server
1239
host with a global address. Work around this by retrying
1240
with an explicit route added with the server's address.
1241
1242
Avahi bug reference:
1243
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1244
https://bugs.debian.org/587961
1245
*/
1246
if(debug){
1247
fprintf_plus(stderr, "Mandos server unreachable, trying"
1248
" direct route\n");
1249
}
1250
int e = errno;
1251
route_added = add_local_route(ip, if_index);
1252
if(route_added){
1253
continue;
1254
}
1255
errno = e;
1256
}
1257
if(errno != ECONNREFUSED or debug){
1258
int e = errno;
1259
perror_plus("connect");
1260
errno = e;
1261
}
1262
goto mandos_end;
1263
}
1264
1265
if(quit_now){
1266
errno = EINTR;
1267
goto mandos_end;
1268
}
1269
break;
722
const char *pcret;
723
if(af == AF_INET6){
724
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
725
sizeof(addrstr));
726
} else {
727
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
728
sizeof(addrstr));
729
}
730
if(pcret == NULL){
731
perror_plus("inet_ntop");
732
} else {
733
if(strcmp(addrstr, ip) != 0){
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
735
}
736
}
737
}
738
739
if(quit_now){
740
errno = EINTR;
741
goto mandos_end;
742
}
743
744
if(af == AF_INET6){
745
ret = connect(tcp_sd, &to.in6, sizeof(to));
746
} else {
747
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
748
}
749
if(ret < 0){
750
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
751
int e = errno;
752
perror_plus("connect");
753
errno = e;
754
}
755
goto mandos_end;
756
}
757
758
if(quit_now){
759
errno = EINTR;
760
goto mandos_end;
1270
761
}
1271
762
1272
763
const char *out = mandos_protocol_version;
1274
765
while(true){
1275
766
size_t out_size = strlen(out);
1276
767
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
1277
out_size - written));
768
out_size - written));
1278
769
if(ret == -1){
1279
770
int e = errno;
1280
771
perror_plus("write");
1300
791
}
1301
792
1302
793
if(debug){
1303
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
794
fprintf(stderr, "Establishing TLS session with %s\n", ip);
1304
795
}
1305
796
1306
797
if(quit_now){
1308
799
goto mandos_end;
1309
800
}
1310
801
1311
/* This casting via intptr_t is to eliminate warning about casting
1312
an int to a pointer type. This is exactly how the GnuTLS Guile
1313
function "set-session-transport-fd!" does it. */
1314
gnutls_transport_set_ptr(session,
1315
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
802
/* Spurious warning from -Wint-to-pointer-cast */
803
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
1316
804
1317
805
if(quit_now){
1318
806
errno = EINTR;
1329
817
1330
818
if(ret != GNUTLS_E_SUCCESS){
1331
819
if(debug){
1332
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
820
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
1333
821
gnutls_perror(ret);
1334
822
}
1335
823
errno = EPROTO;
1339
827
/* Read OpenPGP packet that contains the wanted password */
1340
828
1341
829
if(debug){
1342
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
1343
" %s\n", ip);
830
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
831
ip);
1344
832
}
1345
833
1346
834
while(true){
1351
839
}
1352
840
1353
841
buffer_capacity = incbuffer(&buffer, buffer_length,
1354
buffer_capacity);
842
buffer_capacity);
1355
843
if(buffer_capacity == 0){
1356
844
int e = errno;
1357
845
perror_plus("incbuffer");
1384
872
}
1385
873
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
1386
874
if(ret < 0){
1387
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
1388
"***\n");
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
1389
876
gnutls_perror(ret);
1390
877
errno = EPROTO;
1391
878
goto mandos_end;
1392
879
}
1393
880
break;
1394
881
default:
1395
fprintf_plus(stderr, "Unknown error while reading data from"
1396
" encrypted session with Mandos server\n");
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
1397
884
gnutls_bye(session, GNUTLS_SHUT_RDWR);
1398
885
errno = EIO;
1399
886
goto mandos_end;
1404
891
}
1405
892
1406
893
if(debug){
1407
fprintf_plus(stderr, "Closing TLS session\n");
894
fprintf(stderr, "Closing TLS session\n");
1408
895
}
1409
896
1410
897
if(quit_now){
1422
909
1423
910
if(buffer_length > 0){
1424
911
ssize_t decrypted_buffer_size;
1425
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
1426
&decrypted_buffer, mc);
912
decrypted_buffer_size = pgp_packet_decrypt(buffer,
913
buffer_length,
914
&decrypted_buffer);
1427
915
if(decrypted_buffer_size >= 0){
1428
916
1429
917
written = 0;
1439
927
if(ret == 0 and ferror(stdout)){
1440
928
int e = errno;
1441
929
if(debug){
1442
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
1443
strerror(errno));
930
fprintf(stderr, "Error writing encrypted data: %s\n",
931
strerror(errno));
1444
932
}
1445
933
errno = e;
1446
934
goto mandos_end;
1455
943
1456
944
mandos_end:
1457
945
{
1458
if(route_added){
1459
if(not delete_local_route(ip, if_index)){
1460
fprintf_plus(stderr, "Failed to delete local route to %s on"
1461
" interface %d", ip, if_index);
1462
}
1463
}
1464
946
int e = errno;
1465
947
free(decrypted_buffer);
1466
948
free(buffer);
1483
965
return retval;
1484
966
}
1485
967
1486
__attribute__((nonnull))
1487
968
static void resolve_callback(AvahiSServiceResolver *r,
1488
969
AvahiIfIndex interface,
1489
970
AvahiProtocol proto,
1497
978
AVAHI_GCC_UNUSED AvahiStringList *txt,
1498
979
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1499
980
flags,
1500
void *mc){
1501
if(r == NULL){
1502
return;
1503
}
981
AVAHI_GCC_UNUSED void* userdata){
982
assert(r);
1504
983
1505
984
/* Called whenever a service has been resolved successfully or
1506
985
timed out */
1507
986
1508
987
if(quit_now){
1509
avahi_s_service_resolver_free(r);
1510
988
return;
1511
989
}
1512
990
1513
991
switch(event){
1514
992
default:
1515
993
case AVAHI_RESOLVER_FAILURE:
1516
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1517
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1518
domain,
1519
avahi_strerror(avahi_server_errno
1520
(((mandos_context*)mc)->server)));
994
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
995
" of type '%s' in domain '%s': %s\n", name, type, domain,
996
avahi_strerror(avahi_server_errno(mc.server)));
1521
997
break;
1522
998
1523
999
case AVAHI_RESOLVER_FOUND:
1525
1001
char ip[AVAHI_ADDRESS_STR_MAX];
1526
1002
avahi_address_snprint(ip, sizeof(ip), address);
1527
1003
if(debug){
1528
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1529
PRIdMAX ") on port %" PRIu16 "\n", name,
1530
host_name, ip, (intmax_t)interface, port);
1004
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1005
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1006
ip, (intmax_t)interface, port);
1531
1007
}
1532
int ret = start_mandos_communication(ip, (in_port_t)port,
1533
interface,
1534
avahi_proto_to_af(proto),
1535
mc);
1008
int ret = start_mandos_communication(ip, port, interface,
1009
avahi_proto_to_af(proto));
1536
1010
if(ret == 0){
1537
avahi_simple_poll_quit(simple_poll);
1011
avahi_simple_poll_quit(mc.simple_poll);
1538
1012
} else {
1539
if(not add_server(ip, (in_port_t)port, interface,
1540
avahi_proto_to_af(proto),
1541
&((mandos_context*)mc)->current_server)){
1542
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1543
" list\n", name);
1544
}
1013
ret = add_server(ip, port, interface,
1014
avahi_proto_to_af(proto));
1545
1015
}
1546
1016
}
1547
1017
}
1557
1027
const char *domain,
1558
1028
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1559
1029
flags,
1560
void *mc){
1561
if(b == NULL){
1562
return;
1563
}
1030
AVAHI_GCC_UNUSED void* userdata){
1031
assert(b);
1564
1032
1565
1033
/* Called whenever a new services becomes available on the LAN or
1566
1034
is removed from the LAN */
1573
1041
default:
1574
1042
case AVAHI_BROWSER_FAILURE:
1575
1043
1576
fprintf_plus(stderr, "(Avahi browser) %s\n",
1577
avahi_strerror(avahi_server_errno
1578
(((mandos_context*)mc)->server)));
1579
avahi_simple_poll_quit(simple_poll);
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1046
avahi_simple_poll_quit(mc.simple_poll);
1580
1047
return;
1581
1048
1582
1049
case AVAHI_BROWSER_NEW:
1585
1052
the callback function is called the Avahi server will free the
1586
1053
resolver for us. */
1587
1054
1588
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1589
interface, protocol, name, type,
1590
domain, protocol, 0,
1591
resolve_callback, mc) == NULL)
1592
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1593
" %s\n", name,
1594
avahi_strerror(avahi_server_errno
1595
(((mandos_context*)mc)->server)));
1055
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1056
name, type, domain, protocol, 0,
1057
resolve_callback, NULL) == NULL)
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1596
1060
break;
1597
1061
1598
1062
case AVAHI_BROWSER_REMOVE:
1601
1065
case AVAHI_BROWSER_ALL_FOR_NOW:
1602
1066
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1603
1067
if(debug){
1604
fprintf_plus(stderr, "No Mandos server found, still"
1605
" searching...\n");
1068
fprintf(stderr, "No Mandos server found, still searching...\n");
1606
1069
}
1607
1070
break;
1608
1071
}
1617
1080
signal_received = sig;
1618
1081
int old_errno = errno;
1619
1082
/* set main loop to exit */
1620
if(simple_poll != NULL){
1621
avahi_simple_poll_quit(simple_poll);
1083
if(mc.simple_poll != NULL){
1084
avahi_simple_poll_quit(mc.simple_poll);
1622
1085
}
1623
1086
errno = old_errno;
1624
1087
}
1625
1088
1626
__attribute__((nonnull, warn_unused_result))
1627
1089
bool get_flags(const char *ifname, struct ifreq *ifr){
1628
1090
int ret;
1629
error_t ret_errno;
1630
1091
1631
1092
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1632
1093
if(s < 0){
1633
ret_errno = errno;
1634
1094
perror_plus("socket");
1635
errno = ret_errno;
1636
1095
return false;
1637
1096
}
1638
1097
strcpy(ifr->ifr_name, ifname);
1639
1098
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1640
1099
if(ret == -1){
1641
1100
if(debug){
1642
ret_errno = errno;
1643
1101
perror_plus("ioctl SIOCGIFFLAGS");
1644
errno = ret_errno;
1645
1102
}
1646
1103
return false;
1647
1104
}
1648
1105
return true;
1649
1106
}
1650
1107
1651
__attribute__((nonnull, warn_unused_result))
1652
1108
bool good_flags(const char *ifname, const struct ifreq *ifr){
1653
1109
1654
1110
/* Reject the loopback device */
1655
1111
if(ifr->ifr_flags & IFF_LOOPBACK){
1656
1112
if(debug){
1657
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1658
ifname);
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1659
1115
}
1660
1116
return false;
1661
1117
}
1662
1118
/* Accept point-to-point devices only if connect_to is specified */
1663
1119
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1664
1120
if(debug){
1665
fprintf_plus(stderr, "Accepting point-to-point interface"
1666
" \"%s\"\n", ifname);
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1667
1123
}
1668
1124
return true;
1669
1125
}
1670
1126
/* Otherwise, reject non-broadcast-capable devices */
1671
1127
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1672
1128
if(debug){
1673
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1674
" \"%s\"\n", ifname);
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1675
1131
}
1676
1132
return false;
1677
1133
}
1678
1134
/* Reject non-ARP interfaces (including dummy interfaces) */
1679
1135
if(ifr->ifr_flags & IFF_NOARP){
1680
1136
if(debug){
1681
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1682
ifname);
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1683
1138
}
1684
1139
return false;
1685
1140
}
1686
1141
1687
1142
/* Accept this device */
1688
1143
if(debug){
1689
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1690
1145
}
1691
1146
return true;
1692
1147
}
1696
1151
* corresponds to an acceptable network device.
1697
1152
* (This function is passed to scandir(3) as a filter function.)
1698
1153
*/
1699
__attribute__((nonnull, warn_unused_result))
1700
1154
int good_interface(const struct dirent *if_entry){
1701
1155
if(if_entry->d_name[0] == '.'){
1702
1156
return 0;
1705
1159
struct ifreq ifr;
1706
1160
if(not get_flags(if_entry->d_name, &ifr)){
1707
1161
if(debug){
1708
fprintf_plus(stderr, "Failed to get flags for interface "
1709
"\"%s\"\n", if_entry->d_name);
1710
}
1711
return 0;
1712
}
1713
1714
if(not good_flags(if_entry->d_name, &ifr)){
1715
return 0;
1716
}
1717
return 1;
1718
}
1719
1720
/*
1721
* This function determines if a network interface is up.
1722
*/
1723
__attribute__((nonnull, warn_unused_result))
1724
bool interface_is_up(const char *interface){
1725
struct ifreq ifr;
1726
if(not get_flags(interface, &ifr)){
1727
if(debug){
1728
fprintf_plus(stderr, "Failed to get flags for interface "
1729
"\"%s\"\n", interface);
1730
}
1731
return false;
1732
}
1733
1734
return (bool)(ifr.ifr_flags & IFF_UP);
1735
}
1736
1737
/*
1738
* This function determines if a network interface is running
1739
*/
1740
__attribute__((nonnull, warn_unused_result))
1741
bool interface_is_running(const char *interface){
1742
struct ifreq ifr;
1743
if(not get_flags(interface, &ifr)){
1744
if(debug){
1745
fprintf_plus(stderr, "Failed to get flags for interface "
1746
"\"%s\"\n", interface);
1747
}
1748
return false;
1749
}
1750
1751
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1752
}
1753
1754
__attribute__((nonnull, pure, warn_unused_result))
1162
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1163
if_entry->d_name);
1164
}
1165
return 0;
1166
}
1167
1168
if(not good_flags(if_entry->d_name, &ifr)){
1169
return 0;
1170
}
1171
return 1;
1172
}
1173
1174
/*
1175
* This function determines if a directory entry in /sys/class/net
1176
* corresponds to an acceptable network device which is up.
1177
* (This function is passed to scandir(3) as a filter function.)
1178
*/
1179
int up_interface(const struct dirent *if_entry){
1180
if(if_entry->d_name[0] == '.'){
1181
return 0;
1182
}
1183
1184
struct ifreq ifr;
1185
if(not get_flags(if_entry->d_name, &ifr)){
1186
if(debug){
1187
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1188
if_entry->d_name);
1189
}
1190
return 0;
1191
}
1192
1193
/* Reject down interfaces */
1194
if(not (ifr.ifr_flags & IFF_UP)){
1195
if(debug){
1196
fprintf(stderr, "Rejecting down interface \"%s\"\n",
1197
if_entry->d_name);
1198
}
1199
return 0;
1200
}
1201
1202
/* Reject non-running interfaces */
1203
if(not (ifr.ifr_flags & IFF_RUNNING)){
1204
if(debug){
1205
fprintf(stderr, "Rejecting non-running interface \"%s\"\n",
1206
if_entry->d_name);
1207
}
1208
return 0;
1209
}
1210
1211
if(not good_flags(if_entry->d_name, &ifr)){
1212
return 0;
1213
}
1214
return 1;
1215
}
1216
1755
1217
int notdotentries(const struct dirent *direntry){
1756
1218
/* Skip "." and ".." */
1757
1219
if(direntry->d_name[0] == '.'
1764
1226
}
1765
1227
1766
1228
/* Is this directory entry a runnable program? */
1767
__attribute__((nonnull, warn_unused_result))
1768
1229
int runnable_hook(const struct dirent *direntry){
1769
1230
int ret;
1770
size_t sret;
1771
1231
struct stat st;
1772
1232
1773
1233
if((direntry->d_name)[0] == '\0'){
1775
1235
return 0;
1776
1236
}
1777
1237
1778
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1779
"abcdefghijklmnopqrstuvwxyz"
1780
"0123456789"
1781
"_.-");
1782
if((direntry->d_name)[sret] != '\0'){
1783
/* Contains non-allowed characters */
1784
if(debug){
1785
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1786
direntry->d_name);
1787
}
1788
return 0;
1789
}
1790
1791
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1238
/* Save pointer to last character */
1239
char *end = strchr(direntry->d_name, '\0')-1;
1240
1241
if(*end == '~'){
1242
/* Backup name~ */
1243
return 0;
1244
}
1245
1246
if(((direntry->d_name)[0] == '#')
1247
and (*end == '#')){
1248
/* Temporary #name# */
1249
return 0;
1250
}
1251
1252
/* XXX more rules here */
1253
1254
ret = stat(direntry->d_name, &st);
1792
1255
if(ret == -1){
1793
1256
if(debug){
1794
perror_plus("Could not stat hook");
1257
perror_plus("Could not stat plugin");
1795
1258
}
1796
1259
return 0;
1797
1260
}
1798
1261
if(not (S_ISREG(st.st_mode))){
1799
1262
/* Not a regular file */
1800
if(debug){
1801
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1802
direntry->d_name);
1803
}
1804
1263
return 0;
1805
1264
}
1806
1265
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1807
1266
/* Not executable */
1808
if(debug){
1809
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1810
direntry->d_name);
1811
}
1812
1267
return 0;
1813
1268
}
1814
if(debug){
1815
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1816
direntry->d_name);
1817
}
1818
1269
return 1;
1819
1270
}
1820
1271
1821
__attribute__((nonnull, warn_unused_result))
1822
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1823
mandos_context *mc){
1272
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1824
1273
int ret;
1825
1274
struct timespec now;
1826
1275
struct timespec waited_time;
1827
1276
intmax_t block_time;
1828
1277
1829
1278
while(true){
1830
if(mc->current_server == NULL){
1831
if(debug){
1832
fprintf_plus(stderr, "Wait until first server is found."
1833
" No timeout!\n");
1279
if(mc.current_server == NULL){
1280
if (debug){
1281
fprintf(stderr,
1282
"Wait until first server is found. No timeout!\n");
1834
1283
}
1835
1284
ret = avahi_simple_poll_iterate(s, -1);
1836
1285
} else {
1837
if(debug){
1838
fprintf_plus(stderr, "Check current_server if we should run"
1839
" it, or wait\n");
1286
if (debug){
1287
fprintf(stderr, "Check current_server if we should run it,"
1288
" or wait\n");
1840
1289
}
1841
1290
/* the current time */
1842
1291
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1847
1296
/* Calculating in ms how long time between now and server
1848
1297
who we visted longest time ago. Now - last seen. */
1849
1298
waited_time.tv_sec = (now.tv_sec
1850
- mc->current_server->last_seen.tv_sec);
1299
- mc.current_server->last_seen.tv_sec);
1851
1300
waited_time.tv_nsec = (now.tv_nsec
1852
- mc->current_server->last_seen.tv_nsec);
1301
- mc.current_server->last_seen.tv_nsec);
1853
1302
/* total time is 10s/10,000ms.
1854
1303
Converting to s from ms by dividing by 1,000,
1855
1304
and ns to ms by dividing by 1,000,000. */
1857
1306
- ((intmax_t)waited_time.tv_sec * 1000))
1858
1307
- ((intmax_t)waited_time.tv_nsec / 1000000));
1859
1308
1860
if(debug){
1861
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1862
block_time);
1309
if (debug){
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1863
1311
}
1864
1312
1865
1313
if(block_time <= 0){
1866
ret = start_mandos_communication(mc->current_server->ip,
1867
mc->current_server->port,
1868
mc->current_server->if_index,
1869
mc->current_server->af, mc);
1314
ret = start_mandos_communication(mc.current_server->ip,
1315
mc.current_server->port,
1316
mc.current_server->if_index,
1317
mc.current_server->af);
1870
1318
if(ret == 0){
1871
avahi_simple_poll_quit(s);
1319
avahi_simple_poll_quit(mc.simple_poll);
1872
1320
return 0;
1873
1321
}
1874
1322
ret = clock_gettime(CLOCK_MONOTONIC,
1875
&mc->current_server->last_seen);
1323
&mc.current_server->last_seen);
1876
1324
if(ret == -1){
1877
1325
perror_plus("clock_gettime");
1878
1326
return -1;
1879
1327
}
1880
mc->current_server = mc->current_server->next;
1328
mc.current_server = mc.current_server->next;
1881
1329
block_time = 0; /* Call avahi to find new Mandos
1882
1330
servers, but don't block */
1883
1331
}
1885
1333
ret = avahi_simple_poll_iterate(s, (int)block_time);
1886
1334
}
1887
1335
if(ret != 0){
1888
if(ret > 0 or errno != EINTR){
1336
if (ret > 0 or errno != EINTR) {
1889
1337
return (ret != 1) ? ret : 0;
1890
1338
}
1891
1339
}
1892
1340
}
1893
1341
}
1894
1342
1895
__attribute__((nonnull))
1896
void run_network_hooks(const char *mode, const char *interface,
1897
const float delay){
1898
struct dirent **direntries = NULL;
1899
if(hookdir_fd == -1){
1900
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1901
| O_CLOEXEC);
1902
if(hookdir_fd == -1){
1903
if(errno == ENOENT){
1904
if(debug){
1905
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1906
" found\n", hookdir);
1907
}
1908
} else {
1909
perror_plus("open");
1910
}
1911
return;
1912
}
1913
}
1914
#ifdef __GLIBC__
1915
#if __GLIBC_PREREQ(2, 15)
1916
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1917
runnable_hook, alphasort);
1918
#else /* not __GLIBC_PREREQ(2, 15) */
1919
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1920
alphasort);
1921
#endif /* not __GLIBC_PREREQ(2, 15) */
1922
#else /* not __GLIBC__ */
1923
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1924
alphasort);
1925
#endif /* not __GLIBC__ */
1926
if(numhooks == -1){
1927
perror_plus("scandir");
1928
return;
1929
}
1930
struct dirent *direntry;
1931
int ret;
1932
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1933
if(devnull == -1){
1934
perror_plus("open(\"/dev/null\", O_RDONLY)");
1935
return;
1936
}
1937
for(int i = 0; i < numhooks; i++){
1938
direntry = direntries[i];
1939
if(debug){
1940
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1941
direntry->d_name);
1942
}
1943
pid_t hook_pid = fork();
1944
if(hook_pid == 0){
1945
/* Child */
1946
/* Raise privileges */
1947
errno = raise_privileges_permanently();
1948
if(errno != 0){
1949
perror_plus("Failed to raise privileges");
1950
_exit(EX_NOPERM);
1951
}
1952
/* Set group */
1953
errno = 0;
1954
ret = setgid(0);
1955
if(ret == -1){
1956
perror_plus("setgid");
1957
_exit(EX_NOPERM);
1958
}
1959
/* Reset supplementary groups */
1960
errno = 0;
1961
ret = setgroups(0, NULL);
1962
if(ret == -1){
1963
perror_plus("setgroups");
1964
_exit(EX_NOPERM);
1965
}
1966
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1967
if(ret == -1){
1968
perror_plus("setenv");
1969
_exit(EX_OSERR);
1970
}
1971
ret = setenv("DEVICE", interface, 1);
1972
if(ret == -1){
1973
perror_plus("setenv");
1974
_exit(EX_OSERR);
1975
}
1976
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1977
if(ret == -1){
1978
perror_plus("setenv");
1979
_exit(EX_OSERR);
1980
}
1981
ret = setenv("MODE", mode, 1);
1982
if(ret == -1){
1983
perror_plus("setenv");
1984
_exit(EX_OSERR);
1985
}
1986
char *delaystring;
1987
ret = asprintf(&delaystring, "%f", (double)delay);
1988
if(ret == -1){
1989
perror_plus("asprintf");
1990
_exit(EX_OSERR);
1991
}
1992
ret = setenv("DELAY", delaystring, 1);
1993
if(ret == -1){
1994
free(delaystring);
1995
perror_plus("setenv");
1996
_exit(EX_OSERR);
1997
}
1998
free(delaystring);
1999
if(connect_to != NULL){
2000
ret = setenv("CONNECT", connect_to, 1);
2001
if(ret == -1){
2002
perror_plus("setenv");
2003
_exit(EX_OSERR);
2004
}
2005
}
2006
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
2007
direntry->d_name,
2008
O_RDONLY));
2009
if(hook_fd == -1){
2010
perror_plus("openat");
2011
_exit(EXIT_FAILURE);
2012
}
2013
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2014
perror_plus("close");
2015
_exit(EXIT_FAILURE);
2016
}
2017
ret = dup2(devnull, STDIN_FILENO);
2018
if(ret == -1){
2019
perror_plus("dup2(devnull, STDIN_FILENO)");
2020
_exit(EX_OSERR);
2021
}
2022
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
2023
if(ret == -1){
2024
perror_plus("close");
2025
_exit(EX_OSERR);
2026
}
2027
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
2028
if(ret == -1){
2029
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
2030
_exit(EX_OSERR);
2031
}
2032
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
2033
environ) == -1){
2034
perror_plus("fexecve");
2035
_exit(EXIT_FAILURE);
2036
}
2037
} else {
2038
if(hook_pid == -1){
2039
perror_plus("fork");
2040
free(direntry);
2041
continue;
2042
}
2043
int status;
2044
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
2045
perror_plus("waitpid");
2046
free(direntry);
2047
continue;
2048
}
2049
if(WIFEXITED(status)){
2050
if(WEXITSTATUS(status) != 0){
2051
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
2052
" with status %d\n", direntry->d_name,
2053
WEXITSTATUS(status));
2054
free(direntry);
2055
continue;
2056
}
2057
} else if(WIFSIGNALED(status)){
2058
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
2059
" signal %d\n", direntry->d_name,
2060
WTERMSIG(status));
2061
free(direntry);
2062
continue;
2063
} else {
2064
fprintf_plus(stderr, "Warning: network hook \"%s\""
2065
" crashed\n", direntry->d_name);
2066
free(direntry);
2067
continue;
2068
}
2069
}
2070
if(debug){
2071
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
2072
direntry->d_name);
2073
}
2074
free(direntry);
2075
}
2076
free(direntries);
2077
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
2078
perror_plus("close");
2079
} else {
2080
hookdir_fd = -1;
2081
}
2082
close(devnull);
2083
}
2084
2085
__attribute__((nonnull, warn_unused_result))
2086
error_t bring_up_interface(const char *const interface,
2087
const float delay){
2088
error_t old_errno = errno;
2089
int ret;
2090
struct ifreq network;
2091
unsigned int if_index = if_nametoindex(interface);
2092
if(if_index == 0){
2093
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2094
errno = old_errno;
2095
return ENXIO;
2096
}
2097
2098
if(quit_now){
2099
errno = old_errno;
2100
return EINTR;
2101
}
2102
2103
if(not interface_is_up(interface)){
2104
error_t ret_errno = 0, ioctl_errno = 0;
2105
if(not get_flags(interface, &network)){
2106
ret_errno = errno;
2107
fprintf_plus(stderr, "Failed to get flags for interface "
2108
"\"%s\"\n", interface);
2109
errno = old_errno;
2110
return ret_errno;
2111
}
2112
network.ifr_flags |= IFF_UP; /* set flag */
2113
2114
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2115
if(sd == -1){
2116
ret_errno = errno;
2117
perror_plus("socket");
2118
errno = old_errno;
2119
return ret_errno;
2120
}
2121
2122
if(quit_now){
2123
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2124
if(ret == -1){
2125
perror_plus("close");
2126
}
2127
errno = old_errno;
2128
return EINTR;
2129
}
2130
2131
if(debug){
2132
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
2133
interface);
2134
}
2135
2136
/* Raise privileges */
2137
ret_errno = raise_privileges();
2138
if(ret_errno != 0){
2139
errno = ret_errno;
2140
perror_plus("Failed to raise privileges");
2141
}
2142
2143
#ifdef __linux__
2144
int ret_linux;
2145
bool restore_loglevel = false;
2146
if(ret_errno == 0){
2147
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
2148
messages about the network interface to mess up the prompt */
2149
ret_linux = klogctl(8, NULL, 5);
2150
if(ret_linux == -1){
2151
perror_plus("klogctl");
2152
} else {
2153
restore_loglevel = true;
2154
}
2155
}
2156
#endif /* __linux__ */
2157
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2158
ioctl_errno = errno;
2159
#ifdef __linux__
2160
if(restore_loglevel){
2161
ret_linux = klogctl(7, NULL, 0);
2162
if(ret_linux == -1){
2163
perror_plus("klogctl");
2164
}
2165
}
2166
#endif /* __linux__ */
2167
2168
/* If raise_privileges() succeeded above */
2169
if(ret_errno == 0){
2170
/* Lower privileges */
2171
ret_errno = lower_privileges();
2172
if(ret_errno != 0){
2173
errno = ret_errno;
2174
perror_plus("Failed to lower privileges");
2175
}
2176
}
2177
2178
/* Close the socket */
2179
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2180
if(ret == -1){
2181
perror_plus("close");
2182
}
2183
2184
if(ret_setflags == -1){
2185
errno = ioctl_errno;
2186
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
2187
errno = old_errno;
2188
return ioctl_errno;
2189
}
2190
} else if(debug){
2191
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
2192
interface);
2193
}
2194
2195
/* Sleep checking until interface is running.
2196
Check every 0.25s, up to total time of delay */
2197
for(int i=0; i < delay * 4; i++){
2198
if(interface_is_running(interface)){
2199
break;
2200
}
2201
struct timespec sleeptime = { .tv_nsec = 250000000 };
2202
ret = nanosleep(&sleeptime, NULL);
2203
if(ret == -1 and errno != EINTR){
2204
perror_plus("nanosleep");
2205
}
2206
}
2207
2208
errno = old_errno;
2209
return 0;
2210
}
2211
2212
__attribute__((nonnull, warn_unused_result))
2213
error_t take_down_interface(const char *const interface){
2214
error_t old_errno = errno;
2215
struct ifreq network;
2216
unsigned int if_index = if_nametoindex(interface);
2217
if(if_index == 0){
2218
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
2219
errno = old_errno;
2220
return ENXIO;
2221
}
2222
if(interface_is_up(interface)){
2223
error_t ret_errno = 0, ioctl_errno = 0;
2224
if(not get_flags(interface, &network) and debug){
2225
ret_errno = errno;
2226
fprintf_plus(stderr, "Failed to get flags for interface "
2227
"\"%s\"\n", interface);
2228
errno = old_errno;
2229
return ret_errno;
2230
}
2231
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2232
2233
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
2234
if(sd == -1){
2235
ret_errno = errno;
2236
perror_plus("socket");
2237
errno = old_errno;
2238
return ret_errno;
2239
}
2240
2241
if(debug){
2242
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
2243
interface);
2244
}
2245
2246
/* Raise privileges */
2247
ret_errno = raise_privileges();
2248
if(ret_errno != 0){
2249
errno = ret_errno;
2250
perror_plus("Failed to raise privileges");
2251
}
2252
2253
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
2254
ioctl_errno = errno;
2255
2256
/* If raise_privileges() succeeded above */
2257
if(ret_errno == 0){
2258
/* Lower privileges */
2259
ret_errno = lower_privileges();
2260
if(ret_errno != 0){
2261
errno = ret_errno;
2262
perror_plus("Failed to lower privileges");
2263
}
2264
}
2265
2266
/* Close the socket */
2267
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
2268
if(ret == -1){
2269
perror_plus("close");
2270
}
2271
2272
if(ret_setflags == -1){
2273
errno = ioctl_errno;
2274
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2275
errno = old_errno;
2276
return ioctl_errno;
2277
}
2278
} else if(debug){
2279
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2280
interface);
2281
}
2282
2283
errno = old_errno;
2284
return 0;
2285
}
2286
2287
1343
int main(int argc, char *argv[]){
2288
mandos_context mc = { .server = NULL, .dh_bits = 0,
2289
.priority = "SECURE256:!CTYPE-X.509:"
2290
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2291
.interfaces = NULL, .interfaces_size = 0 };
2292
1344
AvahiSServiceBrowser *sb = NULL;
2293
error_t ret_errno;
1345
int error;
2294
1346
int ret;
2295
1347
intmax_t tmpmax;
2296
1348
char *tmp;
2297
1349
int exitcode = EXIT_SUCCESS;
2298
char *interfaces_to_take_down = NULL;
2299
size_t interfaces_to_take_down_size = 0;
2300
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2301
char old_tempdir[] = "/tmp/mandosXXXXXX";
2302
char *tempdir = NULL;
1350
const char *interface = "";
1351
struct ifreq network;
1352
int sd = -1;
1353
bool take_down_interface = false;
1354
uid_t uid;
1355
gid_t gid;
1356
char tempdir[] = "/tmp/mandosXXXXXX";
1357
bool tempdir_created = false;
2303
1358
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2304
1359
const char *seckey = PATHDIR "/" SECKEY;
2305
1360
const char *pubkey = PATHDIR "/" PUBKEY;
2306
const char *dh_params_file = NULL;
2307
char *interfaces_hooks = NULL;
2308
1361
2309
1362
bool gnutls_initialized = false;
2310
1363
bool gpgme_initialized = false;
2362
1415
.doc = "Bit length of the prime number used in the"
2363
1416
" Diffie-Hellman key exchange",
2364
1417
.group = 2 },
2365
{ .name = "dh-params", .key = 134,
2366
.arg = "FILE",
2367
.doc = "PEM-encoded PKCS#3 file with pre-generated parameters"
2368
" for the Diffie-Hellman key exchange",
2369
.group = 2 },
2370
1418
{ .name = "priority", .key = 130,
2371
1419
.arg = "STRING",
2372
1420
.doc = "GnuTLS priority string for the TLS handshake",
2377
1425
.group = 2 },
2378
1426
{ .name = "retry", .key = 132,
2379
1427
.arg = "SECONDS",
2380
.doc = "Retry interval used when denied by the Mandos server",
2381
.group = 2 },
2382
{ .name = "network-hook-dir", .key = 133,
2383
.arg = "DIR",
2384
.doc = "Directory where network hooks are located",
1428
.doc = "Retry interval used when denied by the mandos server",
2385
1429
.group = 2 },
2386
1430
/*
2387
1431
* These reproduce what we would get without ARGP_NO_HELP
2406
1450
connect_to = arg;
2407
1451
break;
2408
1452
case 'i': /* --interface */
2409
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2410
arg, (int)',');
2411
if(ret_errno != 0){
2412
argp_error(state, "%s", strerror(ret_errno));
2413
}
1453
interface = arg;
2414
1454
break;
2415
1455
case 's': /* --seckey */
2416
1456
seckey = arg;
2427
1467
}
2428
1468
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2429
1469
break;
2430
case 134: /* --dh-params */
2431
dh_params_file = arg;
2432
break;
2433
1470
case 130: /* --priority */
2434
1471
mc.priority = arg;
2435
1472
break;
2448
1485
argp_error(state, "Bad retry interval");
2449
1486
}
2450
1487
break;
2451
case 133: /* --network-hook-dir */
2452
hookdir = arg;
2453
break;
2454
1488
/*
2455
1489
* These reproduce what we would get without ARGP_NO_HELP
2456
1490
*/
2462
1496
argp_state_help(state, state->out_stream,
2463
1497
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2464
1498
case 'V': /* --version */
2465
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1499
fprintf(state->out_stream, "%s\n", argp_program_version);
2466
1500
exit(argp_err_exit_status);
2467
1501
break;
2468
1502
default:
2491
1525
goto end;
2492
1526
}
2493
1527
}
2494
1528
2495
1529
{
2496
1530
/* Work around Debian bug #633582:
2497
1531
<http://bugs.debian.org/633582> */
2498
2499
/* Re-raise privileges */
2500
ret_errno = raise_privileges();
2501
if(ret_errno != 0){
2502
errno = ret_errno;
2503
perror_plus("Failed to raise privileges");
2504
} else {
2505
struct stat st;
2506
2507
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2508
int seckey_fd = open(seckey, O_RDONLY);
2509
if(seckey_fd == -1){
2510
perror_plus("open");
2511
} else {
2512
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2513
if(ret == -1){
2514
perror_plus("fstat");
2515
} else {
2516
if(S_ISREG(st.st_mode)
2517
and st.st_uid == 0 and st.st_gid == 0){
2518
ret = fchown(seckey_fd, uid, gid);
2519
if(ret == -1){
2520
perror_plus("fchown");
2521
}
2522
}
2523
}
2524
TEMP_FAILURE_RETRY(close(seckey_fd));
2525
}
2526
}
2527
2528
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2529
int pubkey_fd = open(pubkey, O_RDONLY);
2530
if(pubkey_fd == -1){
2531
perror_plus("open");
2532
} else {
2533
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2534
if(ret == -1){
2535
perror_plus("fstat");
2536
} else {
2537
if(S_ISREG(st.st_mode)
2538
and st.st_uid == 0 and st.st_gid == 0){
2539
ret = fchown(pubkey_fd, uid, gid);
2540
if(ret == -1){
2541
perror_plus("fchown");
2542
}
2543
}
2544
}
2545
TEMP_FAILURE_RETRY(close(pubkey_fd));
2546
}
2547
}
2548
2549
if(strcmp(dh_params_file, PATHDIR "/dhparams.pem" ) == 0){
2550
int dhparams_fd = open(dh_params_file, O_RDONLY);
2551
if(dhparams_fd == -1){
2552
perror_plus("open");
2553
} else {
2554
ret = (int)TEMP_FAILURE_RETRY(fstat(dhparams_fd, &st));
2555
if(ret == -1){
2556
perror_plus("fstat");
2557
} else {
2558
if(S_ISREG(st.st_mode)
2559
and st.st_uid == 0 and st.st_gid == 0){
2560
ret = fchown(dhparams_fd, uid, gid);
2561
if(ret == -1){
2562
perror_plus("fchown");
2563
}
2564
}
2565
}
2566
TEMP_FAILURE_RETRY(close(dhparams_fd));
2567
}
2568
}
2569
2570
/* Lower privileges */
2571
ret_errno = lower_privileges();
2572
if(ret_errno != 0){
2573
errno = ret_errno;
2574
perror_plus("Failed to lower privileges");
2575
}
2576
}
2577
}
2578
2579
/* Remove invalid interface names (except "none") */
2580
{
2581
char *interface = NULL;
2582
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2583
interface))){
2584
if(strcmp(interface, "none") != 0
2585
and if_nametoindex(interface) == 0){
2586
if(interface[0] != '\0'){
2587
fprintf_plus(stderr, "Not using nonexisting interface"
2588
" \"%s\"\n", interface);
2589
}
2590
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2591
interface = NULL;
2592
}
2593
}
2594
}
2595
2596
/* Run network hooks */
2597
{
2598
if(mc.interfaces != NULL){
2599
interfaces_hooks = malloc(mc.interfaces_size);
2600
if(interfaces_hooks == NULL){
2601
perror_plus("malloc");
1532
struct stat st;
1533
1534
/* Re-raise priviliges */
1535
errno = 0;
1536
ret = seteuid(0);
1537
if(ret == -1){
1538
perror_plus("seteuid");
1539
}
1540
1541
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1542
int seckey_fd = open(seckey, O_RDONLY);
1543
if(seckey_fd == -1){
1544
perror_plus("open");
1545
} else {
1546
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1547
if(ret == -1){
1548
perror_plus("fstat");
1549
} else {
1550
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1551
ret = fchown(seckey_fd, uid, gid);
1552
if(ret == -1){
1553
perror_plus("fchown");
1554
}
1555
}
1556
}
1557
TEMP_FAILURE_RETRY(close(seckey_fd));
1558
}
1559
}
1560
1561
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1562
int pubkey_fd = open(pubkey, O_RDONLY);
1563
if(pubkey_fd == -1){
1564
perror_plus("open");
1565
} else {
1566
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1567
if(ret == -1){
1568
perror_plus("fstat");
1569
} else {
1570
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1571
ret = fchown(pubkey_fd, uid, gid);
1572
if(ret == -1){
1573
perror_plus("fchown");
1574
}
1575
}
1576
}
1577
TEMP_FAILURE_RETRY(close(pubkey_fd));
1578
}
1579
}
1580
1581
/* Lower privileges */
1582
errno = 0;
1583
ret = seteuid(uid);
1584
if(ret == -1){
1585
perror_plus("seteuid");
1586
}
1587
}
1588
1589
/* Find network hooks and run them */
1590
{
1591
struct dirent **direntries;
1592
struct dirent *direntry;
1593
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1594
alphasort);
1595
int devnull = open("/dev/null", O_RDONLY);
1596
for(int i = 0; i < numhooks; i++){
1597
direntry = direntries[0];
1598
char *fullname = NULL;
1599
ret = asprintf(&fullname, "%s/%s", tempdir,
1600
direntry->d_name);
1601
if(ret < 0){
1602
perror_plus("asprintf");
1603
continue;
1604
}
1605
pid_t hook_pid = fork();
1606
if(hook_pid == 0){
1607
/* Child */
1608
dup2(devnull, STDIN_FILENO);
1609
close(devnull);
1610
dup2(STDERR_FILENO, STDOUT_FILENO);
1611
ret = setenv("DEVICE", interface, 1);
1612
if(ret == -1){
1613
perror_plus("setenv");
1614
exit(1);
1615
}
1616
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1617
if(ret == -1){
1618
perror_plus("setenv");
1619
exit(1);
1620
}
1621
ret = setenv("MODE", "start", 1);
1622
if(ret == -1){
1623
perror_plus("setenv");
1624
exit(1);
1625
}
1626
char *delaystring;
1627
ret = asprintf(&delaystring, "%f", delay);
1628
if(ret == -1){
1629
perror_plus("asprintf");
1630
exit(1);
1631
}
1632
ret = setenv("DELAY", delaystring, 1);
1633
if(ret == -1){
1634
free(delaystring);
1635
perror_plus("setenv");
1636
exit(1);
1637
}
1638
free(delaystring);
1639
ret = execl(fullname, direntry->d_name, "start", NULL);
1640
perror_plus("execl");
1641
}
1642
free(fullname);
1643
if(quit_now){
2602
1644
goto end;
2603
1645
}
2604
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2605
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2606
1646
}
2607
run_network_hooks("start", interfaces_hooks != NULL ?
2608
interfaces_hooks : "", delay);
1647
close(devnull);
2609
1648
}
2610
1649
2611
1650
if(not debug){
2612
1651
avahi_set_log_function(empty_log);
2613
1652
}
2614
1653
1654
if(interface[0] == '\0'){
1655
struct dirent **direntries;
1656
/* First look for interfaces that are up */
1657
ret = scandir(sys_class_net, &direntries, up_interface,
1658
alphasort);
1659
if(ret == 0){
1660
/* No up interfaces, look for any good interfaces */
1661
free(direntries);
1662
ret = scandir(sys_class_net, &direntries, good_interface,
1663
alphasort);
1664
}
1665
if(ret >= 1){
1666
/* Pick the first interface returned */
1667
interface = strdup(direntries[0]->d_name);
1668
if(debug){
1669
fprintf(stderr, "Using interface \"%s\"\n", interface);
1670
}
1671
if(interface == NULL){
1672
perror_plus("malloc");
1673
free(direntries);
1674
exitcode = EXIT_FAILURE;
1675
goto end;
1676
}
1677
free(direntries);
1678
} else {
1679
free(direntries);
1680
fprintf(stderr, "Could not find a network interface\n");
1681
exitcode = EXIT_FAILURE;
1682
goto end;
1683
}
1684
}
1685
2615
1686
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2616
1687
from the signal handler */
2617
1688
/* Initialize the pseudo-RNG for Avahi */
2618
1689
srand((unsigned int) time(NULL));
2619
simple_poll = avahi_simple_poll_new();
2620
if(simple_poll == NULL){
2621
fprintf_plus(stderr,
2622
"Avahi: Failed to create simple poll object.\n");
1690
mc.simple_poll = avahi_simple_poll_new();
1691
if(mc.simple_poll == NULL){
1692
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2623
1693
exitcode = EX_UNAVAILABLE;
2624
1694
goto end;
2625
1695
}
2687
1757
}
2688
1758
}
2689
1759
2690
/* If no interfaces were specified, make a list */
2691
if(mc.interfaces == NULL){
2692
struct dirent **direntries = NULL;
2693
/* Look for any good interfaces */
2694
ret = scandir(sys_class_net, &direntries, good_interface,
2695
alphasort);
2696
if(ret >= 1){
2697
/* Add all found interfaces to interfaces list */
2698
for(int i = 0; i < ret; ++i){
2699
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2700
direntries[i]->d_name);
2701
if(ret_errno != 0){
2702
errno = ret_errno;
2703
perror_plus("argz_add");
2704
free(direntries[i]);
2705
continue;
2706
}
2707
if(debug){
2708
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2709
direntries[i]->d_name);
2710
}
2711
free(direntries[i]);
2712
}
2713
free(direntries);
1760
/* If the interface is down, bring it up */
1761
if(strcmp(interface, "none") != 0){
1762
if_index = (AvahiIfIndex) if_nametoindex(interface);
1763
if(if_index == 0){
1764
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1765
exitcode = EX_UNAVAILABLE;
1766
goto end;
1767
}
1768
1769
if(quit_now){
1770
goto end;
1771
}
1772
1773
/* Re-raise priviliges */
1774
errno = 0;
1775
ret = seteuid(0);
1776
if(ret == -1){
1777
perror_plus("seteuid");
1778
}
1779
1780
#ifdef __linux__
1781
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1782
messages about the network interface to mess up the prompt */
1783
ret = klogctl(8, NULL, 5);
1784
bool restore_loglevel = true;
1785
if(ret == -1){
1786
restore_loglevel = false;
1787
perror_plus("klogctl");
1788
}
1789
#endif /* __linux__ */
1790
1791
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1792
if(sd < 0){
1793
perror_plus("socket");
1794
exitcode = EX_OSERR;
1795
#ifdef __linux__
1796
if(restore_loglevel){
1797
ret = klogctl(7, NULL, 0);
1798
if(ret == -1){
1799
perror_plus("klogctl");
1800
}
1801
}
1802
#endif /* __linux__ */
1803
/* Lower privileges */
1804
errno = 0;
1805
ret = seteuid(uid);
1806
if(ret == -1){
1807
perror_plus("seteuid");
1808
}
1809
goto end;
1810
}
1811
strcpy(network.ifr_name, interface);
1812
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1813
if(ret == -1){
1814
perror_plus("ioctl SIOCGIFFLAGS");
1815
#ifdef __linux__
1816
if(restore_loglevel){
1817
ret = klogctl(7, NULL, 0);
1818
if(ret == -1){
1819
perror_plus("klogctl");
1820
}
1821
}
1822
#endif /* __linux__ */
1823
exitcode = EX_OSERR;
1824
/* Lower privileges */
1825
errno = 0;
1826
ret = seteuid(uid);
1827
if(ret == -1){
1828
perror_plus("seteuid");
1829
}
1830
goto end;
1831
}
1832
if((network.ifr_flags & IFF_UP) == 0){
1833
network.ifr_flags |= IFF_UP;
1834
take_down_interface = true;
1835
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1836
if(ret == -1){
1837
take_down_interface = false;
1838
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1839
exitcode = EX_OSERR;
1840
#ifdef __linux__
1841
if(restore_loglevel){
1842
ret = klogctl(7, NULL, 0);
1843
if(ret == -1){
1844
perror_plus("klogctl");
1845
}
1846
}
1847
#endif /* __linux__ */
1848
/* Lower privileges */
1849
errno = 0;
1850
ret = seteuid(uid);
1851
if(ret == -1){
1852
perror_plus("seteuid");
1853
}
1854
goto end;
1855
}
1856
}
1857
/* Sleep checking until interface is running.
1858
Check every 0.25s, up to total time of delay */
1859
for(int i=0; i < delay * 4; i++){
1860
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1861
if(ret == -1){
1862
perror_plus("ioctl SIOCGIFFLAGS");
1863
} else if(network.ifr_flags & IFF_RUNNING){
1864
break;
1865
}
1866
struct timespec sleeptime = { .tv_nsec = 250000000 };
1867
ret = nanosleep(&sleeptime, NULL);
1868
if(ret == -1 and errno != EINTR){
1869
perror_plus("nanosleep");
1870
}
1871
}
1872
if(not take_down_interface){
1873
/* We won't need the socket anymore */
1874
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1875
if(ret == -1){
1876
perror_plus("close");
1877
}
1878
}
1879
#ifdef __linux__
1880
if(restore_loglevel){
1881
/* Restores kernel loglevel to default */
1882
ret = klogctl(7, NULL, 0);
1883
if(ret == -1){
1884
perror_plus("klogctl");
1885
}
1886
}
1887
#endif /* __linux__ */
1888
/* Lower privileges */
1889
errno = 0;
1890
if(take_down_interface){
1891
/* Lower privileges */
1892
ret = seteuid(uid);
1893
if(ret == -1){
1894
perror_plus("seteuid");
1895
}
2714
1896
} else {
2715
if(ret == 0){
2716
free(direntries);
2717
}
2718
fprintf_plus(stderr, "Could not find a network interface\n");
2719
exitcode = EXIT_FAILURE;
2720
goto end;
2721
}
2722
}
2723
2724
/* Bring up interfaces which are down, and remove any "none"s */
2725
{
2726
char *interface = NULL;
2727
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2728
interface))){
2729
/* If interface name is "none", stop bringing up interfaces.
2730
Also remove all instances of "none" from the list */
2731
if(strcmp(interface, "none") == 0){
2732
argz_delete(&mc.interfaces, &mc.interfaces_size,
2733
interface);
2734
interface = NULL;
2735
while((interface = argz_next(mc.interfaces,
2736
mc.interfaces_size, interface))){
2737
if(strcmp(interface, "none") == 0){
2738
argz_delete(&mc.interfaces, &mc.interfaces_size,
2739
interface);
2740
interface = NULL;
2741
}
2742
}
2743
break;
2744
}
2745
bool interface_was_up = interface_is_up(interface);
2746
errno = bring_up_interface(interface, delay);
2747
if(not interface_was_up){
2748
if(errno != 0){
2749
fprintf_plus(stderr, "Failed to bring up interface \"%s\":"
2750
" %s\n", interface, strerror(errno));
2751
} else {
2752
errno = argz_add(&interfaces_to_take_down,
2753
&interfaces_to_take_down_size,
2754
interface);
2755
if(errno != 0){
2756
perror_plus("argz_add");
2757
}
2758
}
2759
}
2760
}
2761
if(debug and (interfaces_to_take_down == NULL)){
2762
fprintf_plus(stderr, "No interfaces were brought up\n");
2763
}
2764
}
2765
2766
/* If we only got one interface, explicitly use only that one */
2767
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2768
if(debug){
2769
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2770
mc.interfaces);
2771
}
2772
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1897
/* Lower privileges permanently */
1898
ret = setuid(uid);
1899
if(ret == -1){
1900
perror_plus("setuid");
1901
}
1902
}
2773
1903
}
2774
1904
2775
1905
if(quit_now){
2776
1906
goto end;
2777
1907
}
2778
1908
2779
ret = init_gnutls_global(pubkey, seckey, dh_params_file, &mc);
1909
ret = init_gnutls_global(pubkey, seckey);
2780
1910
if(ret == -1){
2781
fprintf_plus(stderr, "init_gnutls_global failed\n");
1911
fprintf(stderr, "init_gnutls_global failed\n");
2782
1912
exitcode = EX_UNAVAILABLE;
2783
1913
goto end;
2784
1914
} else {
2789
1919
goto end;
2790
1920
}
2791
1921
2792
/* Try /run/tmp before /tmp */
2793
tempdir = mkdtemp(run_tempdir);
2794
if(tempdir == NULL and errno == ENOENT){
2795
if(debug){
2796
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2797
run_tempdir, old_tempdir);
2798
}
2799
tempdir = mkdtemp(old_tempdir);
2800
}
2801
if(tempdir == NULL){
1922
if(mkdtemp(tempdir) == NULL){
2802
1923
perror_plus("mkdtemp");
2803
1924
goto end;
2804
1925
}
1926
tempdir_created = true;
2805
1927
2806
1928
if(quit_now){
2807
1929
goto end;
2808
1930
}
2809
1931
2810
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2811
fprintf_plus(stderr, "init_gpgme failed\n");
1932
if(not init_gpgme(pubkey, seckey, tempdir)){
1933
fprintf(stderr, "init_gpgme failed\n");
2812
1934
exitcode = EX_UNAVAILABLE;
2813
1935
goto end;
2814
1936
} else {
2823
1945
/* Connect directly, do not use Zeroconf */
2824
1946
/* (Mainly meant for debugging) */
2825
1947
char *address = strrchr(connect_to, ':');
2826
2827
1948
if(address == NULL){
2828
fprintf_plus(stderr, "No colon in address\n");
1949
fprintf(stderr, "No colon in address\n");
2829
1950
exitcode = EX_USAGE;
2830
1951
goto end;
2831
1952
}
2834
1955
goto end;
2835
1956
}
2836
1957
2837
in_port_t port;
1958
uint16_t port;
2838
1959
errno = 0;
2839
1960
tmpmax = strtoimax(address+1, &tmp, 10);
2840
1961
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2841
or tmpmax != (in_port_t)tmpmax){
2842
fprintf_plus(stderr, "Bad port number\n");
1962
or tmpmax != (uint16_t)tmpmax){
1963
fprintf(stderr, "Bad port number\n");
2843
1964
exitcode = EX_USAGE;
2844
1965
goto end;
2845
1966
}
2846
1967
2847
1968
if(quit_now){
2848
1969
goto end;
2849
1970
}
2850
1971
2851
port = (in_port_t)tmpmax;
1972
port = (uint16_t)tmpmax;
2852
1973
*address = '\0';
2853
1974
/* Colon in address indicates IPv6 */
2854
1975
int af;
2870
1991
}
2871
1992
2872
1993
while(not quit_now){
2873
ret = start_mandos_communication(address, port, if_index, af,
2874
&mc);
1994
ret = start_mandos_communication(address, port, if_index, af);
2875
1995
if(quit_now or ret == 0){
2876
1996
break;
2877
1997
}
2878
1998
if(debug){
2879
fprintf_plus(stderr, "Retrying in %d seconds\n",
2880
(int)retry_interval);
1999
fprintf(stderr, "Retrying in %d seconds\n",
2000
(int)retry_interval);
2881
2001
}
2882
sleep((unsigned int)retry_interval);
2002
sleep((int)retry_interval);
2883
2003
}
2884
2004
2885
if(not quit_now){
2005
if (not quit_now){
2886
2006
exitcode = EXIT_SUCCESS;
2887
2007
}
2888
2008
2903
2023
config.publish_domain = 0;
2904
2024
2905
2025
/* Allocate a new server */
2906
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2907
&config, NULL, NULL, &ret_errno);
2026
mc.server = avahi_server_new(avahi_simple_poll_get
2027
(mc.simple_poll), &config, NULL,
2028
NULL, &error);
2908
2029
2909
2030
/* Free the Avahi configuration data */
2910
2031
avahi_server_config_free(&config);
2912
2033
2913
2034
/* Check if creating the Avahi server object succeeded */
2914
2035
if(mc.server == NULL){
2915
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2916
avahi_strerror(ret_errno));
2036
fprintf(stderr, "Failed to create Avahi server: %s\n",
2037
avahi_strerror(error));
2917
2038
exitcode = EX_UNAVAILABLE;
2918
2039
goto end;
2919
2040
}
2925
2046
/* Create the Avahi service browser */
2926
2047
sb = avahi_s_service_browser_new(mc.server, if_index,
2927
2048
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2928
NULL, 0, browse_callback,
2929
(void *)&mc);
2049
NULL, 0, browse_callback, NULL);
2930
2050
if(sb == NULL){
2931
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2932
avahi_strerror(avahi_server_errno(mc.server)));
2051
fprintf(stderr, "Failed to create service browser: %s\n",
2052
avahi_strerror(avahi_server_errno(mc.server)));
2933
2053
exitcode = EX_UNAVAILABLE;
2934
2054
goto end;
2935
2055
}
2941
2061
/* Run the main loop */
2942
2062
2943
2063
if(debug){
2944
fprintf_plus(stderr, "Starting Avahi loop search\n");
2064
fprintf(stderr, "Starting Avahi loop search\n");
2945
2065
}
2946
2947
ret = avahi_loop_with_timeout(simple_poll,
2948
(int)(retry_interval * 1000), &mc);
2066
2067
ret = avahi_loop_with_timeout(mc.simple_poll,
2068
(int)(retry_interval * 1000));
2949
2069
if(debug){
2950
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2951
(ret == 0) ? "successfully" : "with error");
2070
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2071
(ret == 0) ? "successfully" : "with error");
2952
2072
}
2953
2073
2954
2074
end:
2955
2075
2956
2076
if(debug){
2957
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2077
fprintf(stderr, "%s exiting\n", argv[0]);
2958
2078
}
2959
2079
2960
2080
/* Cleanup things */
2961
free(mc.interfaces);
2962
2963
2081
if(sb != NULL)
2964
2082
avahi_s_service_browser_free(sb);
2965
2083
2966
2084
if(mc.server != NULL)
2967
2085
avahi_server_free(mc.server);
2968
2086
2969
if(simple_poll != NULL)
2970
avahi_simple_poll_free(simple_poll);
2087
if(mc.simple_poll != NULL)
2088
avahi_simple_poll_free(mc.simple_poll);
2971
2089
2972
2090
if(gnutls_initialized){
2973
2091
gnutls_certificate_free_credentials(mc.cred);
2978
2096
if(gpgme_initialized){
2979
2097
gpgme_release(mc.ctx);
2980
2098
}
2981
2099
2982
2100
/* Cleans up the circular linked list of Mandos servers the client
2983
2101
has seen */
2984
2102
if(mc.current_server != NULL){
2985
2103
mc.current_server->prev->next = NULL;
2986
2104
while(mc.current_server != NULL){
2987
2105
server *next = mc.current_server->next;
2988
#ifdef __GNUC__
2989
#pragma GCC diagnostic push
2990
#pragma GCC diagnostic ignored "-Wcast-qual"
2991
#endif
2992
free((char *)(mc.current_server->ip));
2993
#ifdef __GNUC__
2994
#pragma GCC diagnostic pop
2995
#endif
2996
2106
free(mc.current_server);
2997
2107
mc.current_server = next;
2998
2108
}
2999
2109
}
3000
2110
3001
/* Re-raise privileges */
3002
{
3003
ret_errno = raise_privileges();
3004
if(ret_errno != 0){
3005
errno = ret_errno;
3006
perror_plus("Failed to raise privileges");
3007
} else {
3008
3009
/* Run network hooks */
3010
run_network_hooks("stop", interfaces_hooks != NULL ?
3011
interfaces_hooks : "", delay);
3012
3013
/* Take down the network interfaces which were brought up */
3014
{
3015
char *interface = NULL;
3016
while((interface=argz_next(interfaces_to_take_down,
3017
interfaces_to_take_down_size,
3018
interface))){
3019
ret_errno = take_down_interface(interface);
3020
if(ret_errno != 0){
3021
errno = ret_errno;
3022
perror_plus("Failed to take down interface");
3023
}
3024
}
3025
if(debug and (interfaces_to_take_down == NULL)){
3026
fprintf_plus(stderr, "No interfaces needed to be taken"
3027
" down\n");
3028
}
3029
}
2111
/* XXX run network hooks "stop" here */
2112
2113
/* Take down the network interface */
2114
if(take_down_interface){
2115
/* Re-raise priviliges */
2116
errno = 0;
2117
ret = seteuid(0);
2118
if(ret == -1){
2119
perror_plus("seteuid");
3030
2120
}
3031
3032
ret_errno = lower_privileges_permanently();
3033
if(ret_errno != 0){
3034
errno = ret_errno;
3035
perror_plus("Failed to lower privileges permanently");
2121
if(geteuid() == 0){
2122
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2123
if(ret == -1){
2124
perror_plus("ioctl SIOCGIFFLAGS");
2125
} else if(network.ifr_flags & IFF_UP) {
2126
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2127
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2128
if(ret == -1){
2129
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2130
}
2131
}
2132
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2133
if(ret == -1){
2134
perror_plus("close");
2135
}
2136
/* Lower privileges permanently */
2137
errno = 0;
2138
ret = setuid(uid);
2139
if(ret == -1){
2140
perror_plus("setuid");
2141
}
3036
2142
}
3037
2143
}
3038
2144
3039
free(interfaces_to_take_down);
3040
free(interfaces_hooks);
3041
3042
2145
/* Removes the GPGME temp directory and all files inside */
3043
if(tempdir != NULL){
2146
if(tempdir_created){
3044
2147
struct dirent **direntries = NULL;
3045
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
3046
| O_NOFOLLOW
3047
| O_DIRECTORY
3048
| O_PATH));
3049
if(tempdir_fd == -1){
3050
perror_plus("open");
3051
} else {
3052
#ifdef __GLIBC__
3053
#if __GLIBC_PREREQ(2, 15)
3054
int numentries = scandirat(tempdir_fd, ".", &direntries,
3055
notdotentries, alphasort);
3056
#else /* not __GLIBC_PREREQ(2, 15) */
3057
int numentries = scandir(tempdir, &direntries, notdotentries,
3058
alphasort);
3059
#endif /* not __GLIBC_PREREQ(2, 15) */
3060
#else /* not __GLIBC__ */
3061
int numentries = scandir(tempdir, &direntries, notdotentries,
3062
alphasort);
3063
#endif /* not __GLIBC__ */
3064
if(numentries >= 0){
3065
for(int i = 0; i < numentries; i++){
3066
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
3067
if(ret == -1){
3068
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
3069
" \"%s\", 0): %s\n", tempdir,
3070
direntries[i]->d_name, strerror(errno));
3071
}
3072
free(direntries[i]);
3073
}
3074
3075
/* need to clean even if 0 because man page doesn't specify */
3076
free(direntries);
3077
if(numentries == -1){
3078
perror_plus("scandir");
3079
}
3080
ret = rmdir(tempdir);
3081
if(ret == -1 and errno != ENOENT){
3082
perror_plus("rmdir");
3083
}
2148
struct dirent *direntry = NULL;
2149
int numentries = scandir(tempdir, &direntries, notdotentries,
2150
alphasort);
2151
if (numentries > 0){
2152
for(int i = 0; i < numentries; i++){
2153
direntry = direntries[i];
2154
char *fullname = NULL;
2155
ret = asprintf(&fullname, "%s/%s", tempdir,
2156
direntry->d_name);
2157
if(ret < 0){
2158
perror_plus("asprintf");
2159
continue;
2160
}
2161
ret = remove(fullname);
2162
if(ret == -1){
2163
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2164
strerror(errno));
2165
}
2166
free(fullname);
3084
2167
}
3085
TEMP_FAILURE_RETRY(close(tempdir_fd));
2168
}
2169
2170
/* need to clean even if 0 because man page doesn't specify */
2171
free(direntries);
2172
if (numentries == -1){
2173
perror_plus("scandir");
2174
}
2175
ret = rmdir(tempdir);
2176
if(ret == -1 and errno != ENOENT){
2177
perror_plus("rmdir");
3086
2178
}
3087
2179
}
3088
2180
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0