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237.25.1
(compared to revision 237.7.148)
: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2015-06-28 16:35:27 UTC
- mto: (237.7.307 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150628163527-cky0ec59zew7teua
Add a plugin helper directory, available to all plugins.
* Makefile (PLUGIN_HELPERS): New; list of plugin helpers.
(CPROGS): Appended "$(PLUGIN_HELPERS)".
* initramfs-tools-hook: Create new plugin helper directory, and copy
plugin helpers provided by the system and/or
by the local administrator.
(PLUGINHELPERDIR): New.
* plugin-runner.c: Take new --plugin-helper-dir option and provide
environment variable to all plugins.
(PHDIR): New; set to "/lib/mandos/plugin-helpers".
(main/pluginhelperdir): New.
(main/options): New option "--plugin-helper-dir".
(main/parse_opt, main/parse_opt_config_file): Accept new option.
(main): Use new option to set MANDOSPLUGINHELPERDIR environment
variable as if using --global-env MANDOSPLUGINHELPERDIR=...
* plugin-runner.xml: Document new --plugin-helper-dir option.
(SYNOPSIS, OPTIONS): Add "--plugin-helper-dir" option.
(PLUGINS/WRITING PLUGINS): Document new environment variable
available to plugins.
(ENVIRONMENT): Document new environment variable
"MANDOSPLUGINHELPERDIR" affected by the new
--plugin-helper-dir option.
* Makefile (PLUGIN_HELPERS): New; list of plugin helpers.
(CPROGS): Appended "$(PLUGIN_HELPERS)".
* initramfs-tools-hook: Create new plugin helper directory, and copy
plugin helpers provided by the system and/or
by the local administrator.
(PLUGINHELPERDIR): New.
* plugin-runner.c: Take new --plugin-helper-dir option and provide
environment variable to all plugins.
(PHDIR): New; set to "/lib/mandos/plugin-helpers".
(main/pluginhelperdir): New.
(main/options): New option "--plugin-helper-dir".
(main/parse_opt, main/parse_opt_config_file): Accept new option.
(main): Use new option to set MANDOSPLUGINHELPERDIR environment
variable as if using --global-env MANDOSPLUGINHELPERDIR=...
* plugin-runner.xml: Document new --plugin-helper-dir option.
(SYNOPSIS, OPTIONS): Add "--plugin-helper-dir" option.
(PLUGINS/WRITING PLUGINS): Document new environment variable
available to plugins.
(ENVIRONMENT): Document new environment variable
"MANDOSPLUGINHELPERDIR" affected by the new
--plugin-helper-dir option.
- files added:
- debian/upstream
- plugin-helpers
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 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
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif
38
#endif /* not _FILE_OFFSET_BITS */
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
43
stdout, ferror() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
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
#include <fcntl.h> /* open() */
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
77
79
#include <iso646.h> /* not, or, and */
78
80
#include <argp.h> /* struct argp_option, error_t, struct
79
81
argp_state, struct argp,
91
93
argz_delete(), argz_append(),
92
94
argz_stringify(), argz_add(),
93
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
94
98
95
99
#ifdef __linux__
96
100
#include <sys/klog.h> /* klogctl() */
138
142
static const char sys_class_net[] = "/sys/class/net";
139
143
char *connect_to = NULL;
140
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
141
146
uid_t uid = 65534;
142
147
gid_t gid = 65534;
143
148
154
159
155
160
/* Used for passing in values through the Avahi callback functions */
156
161
typedef struct {
157
AvahiSimplePoll *simple_poll;
158
162
AvahiServer *server;
159
163
gnutls_certificate_credentials_t cred;
160
164
unsigned int dh_bits;
162
166
const char *priority;
163
167
gpgme_ctx_t ctx;
164
168
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
165
171
} mandos_context;
166
172
167
/* global context so signal handler can reach it*/
168
mandos_context mc = { .simple_poll = NULL, .server = NULL,
169
.dh_bits = 1024, .priority = "SECURE256"
170
":!CTYPE-X.509:+CTYPE-OPENPGP",
171
.current_server = NULL };
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
172
175
173
176
sig_atomic_t quit_now = 0;
174
177
int signal_received = 0;
182
185
perror(print_text);
183
186
}
184
187
185
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
186
189
int fprintf_plus(FILE *stream, const char *format, ...){
187
190
va_list ap;
188
191
va_start (ap, format);
189
192
190
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
191
194
program_invocation_short_name));
192
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
196
}
194
197
195
198
/*
197
200
* bytes. "buffer_capacity" is how much is currently allocated,
198
201
* "buffer_length" is how much is already used.
199
202
*/
203
__attribute__((nonnull, warn_unused_result))
200
204
size_t incbuffer(char **buffer, size_t buffer_length,
201
205
size_t buffer_capacity){
202
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
203
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
204
if(buffer == NULL){
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;
205
213
return 0;
206
214
}
215
*buffer = new_buf;
207
216
buffer_capacity += BUFFER_SIZE;
208
217
}
209
218
return buffer_capacity;
210
219
}
211
220
212
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
213
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
214
int af){
224
int af, server **current_server){
215
225
int ret;
216
226
server *new_server = malloc(sizeof(server));
217
227
if(new_server == NULL){
224
234
.af = af };
225
235
if(new_server->ip == NULL){
226
236
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);
227
252
return false;
228
253
}
229
254
/* Special case of first server */
230
if (mc.current_server == NULL){
255
if(*current_server == NULL){
231
256
new_server->next = new_server;
232
257
new_server->prev = new_server;
233
mc.current_server = new_server;
234
/* Place the new server last in the list */
258
*current_server = new_server;
235
259
} else {
236
new_server->next = mc.current_server;
237
new_server->prev = mc.current_server->prev;
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
238
263
new_server->prev->next = new_server;
239
mc.current_server->prev = new_server;
240
}
241
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
242
if(ret == -1){
243
perror_plus("clock_gettime");
244
return false;
264
(*current_server)->prev = new_server;
245
265
}
246
266
return true;
247
267
}
249
269
/*
250
270
* Initialize GPGME.
251
271
*/
252
static bool init_gpgme(const char *seckey, const char *pubkey,
253
const char *tempdir){
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){
254
277
gpgme_error_t rc;
255
278
gpgme_engine_info_t engine_info;
256
279
257
258
280
/*
259
281
* Helper function to insert pub and seckey to the engine keyring.
260
282
*/
261
bool import_key(const char *filename){
283
bool import_key(const char * const filename){
262
284
int ret;
263
285
int fd;
264
286
gpgme_data_t pgp_data;
276
298
return false;
277
299
}
278
300
279
rc = gpgme_op_import(mc.ctx, pgp_data);
301
rc = gpgme_op_import(mc->ctx, pgp_data);
280
302
if(rc != GPG_ERR_NO_ERROR){
281
303
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
282
304
gpgme_strsource(rc), gpgme_strerror(rc));
326
348
}
327
349
328
350
/* Create new GPGME "context" */
329
rc = gpgme_new(&(mc.ctx));
351
rc = gpgme_new(&(mc->ctx));
330
352
if(rc != GPG_ERR_NO_ERROR){
331
353
fprintf_plus(stderr, "Mandos plugin mandos-client: "
332
354
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
345
367
* Decrypt OpenPGP data.
346
368
* Returns -1 on error
347
369
*/
370
__attribute__((nonnull, warn_unused_result))
348
371
static ssize_t pgp_packet_decrypt(const char *cryptotext,
349
372
size_t crypto_size,
350
char **plaintext){
373
char **plaintext,
374
mandos_context *mc){
351
375
gpgme_data_t dh_crypto, dh_plain;
352
376
gpgme_error_t rc;
353
377
ssize_t ret;
379
403
380
404
/* Decrypt data from the cryptotext data buffer to the plaintext
381
405
data buffer */
382
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
383
407
if(rc != GPG_ERR_NO_ERROR){
384
408
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
385
409
gpgme_strsource(rc), gpgme_strerror(rc));
386
410
plaintext_length = -1;
387
411
if(debug){
388
412
gpgme_decrypt_result_t result;
389
result = gpgme_op_decrypt_result(mc.ctx);
413
result = gpgme_op_decrypt_result(mc->ctx);
390
414
if(result == NULL){
391
415
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
392
416
} else {
469
493
return plaintext_length;
470
494
}
471
495
472
static const char * safer_gnutls_strerror(int value){
496
__attribute__((warn_unused_result))
497
static const char *safer_gnutls_strerror(int value){
473
498
const char *ret = gnutls_strerror(value);
474
499
if(ret == NULL)
475
500
ret = "(unknown)";
477
502
}
478
503
479
504
/* GnuTLS log function callback */
505
__attribute__((nonnull))
480
506
static void debuggnutls(__attribute__((unused)) int level,
481
507
const char* string){
482
508
fprintf_plus(stderr, "GnuTLS: %s", string);
483
509
}
484
510
511
__attribute__((nonnull, warn_unused_result))
485
512
static int init_gnutls_global(const char *pubkeyfilename,
486
const char *seckeyfilename){
513
const char *seckeyfilename,
514
mandos_context *mc){
487
515
int ret;
488
516
489
517
if(debug){
506
534
}
507
535
508
536
/* OpenPGP credentials */
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
537
ret = gnutls_certificate_allocate_credentials(&mc->cred);
510
538
if(ret != GNUTLS_E_SUCCESS){
511
539
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
512
540
safer_gnutls_strerror(ret));
522
550
}
523
551
524
552
ret = gnutls_certificate_set_openpgp_key_file
525
(mc.cred, pubkeyfilename, seckeyfilename,
553
(mc->cred, pubkeyfilename, seckeyfilename,
526
554
GNUTLS_OPENPGP_FMT_BASE64);
527
555
if(ret != GNUTLS_E_SUCCESS){
528
556
fprintf_plus(stderr,
534
562
}
535
563
536
564
/* GnuTLS server initialization */
537
ret = gnutls_dh_params_init(&mc.dh_params);
565
ret = gnutls_dh_params_init(&mc->dh_params);
538
566
if(ret != GNUTLS_E_SUCCESS){
539
567
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
540
568
" initialization: %s\n",
541
569
safer_gnutls_strerror(ret));
542
570
goto globalfail;
543
571
}
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
572
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
545
573
if(ret != GNUTLS_E_SUCCESS){
546
574
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
575
safer_gnutls_strerror(ret));
548
576
goto globalfail;
549
577
}
550
578
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
579
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
552
580
553
581
return 0;
554
582
555
583
globalfail:
556
584
557
gnutls_certificate_free_credentials(mc.cred);
585
gnutls_certificate_free_credentials(mc->cred);
558
586
gnutls_global_deinit();
559
gnutls_dh_params_deinit(mc.dh_params);
587
gnutls_dh_params_deinit(mc->dh_params);
560
588
return -1;
561
589
}
562
590
563
static int init_gnutls_session(gnutls_session_t *session){
591
__attribute__((nonnull, warn_unused_result))
592
static int init_gnutls_session(gnutls_session_t *session,
593
mandos_context *mc){
564
594
int ret;
565
595
/* GnuTLS session creation */
566
596
do {
578
608
{
579
609
const char *err;
580
610
do {
581
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
611
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
582
612
if(quit_now){
583
613
gnutls_deinit(*session);
584
614
return -1;
595
625
596
626
do {
597
627
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
mc.cred);
628
mc->cred);
599
629
if(quit_now){
600
630
gnutls_deinit(*session);
601
631
return -1;
611
641
/* ignore client certificate if any. */
612
642
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
643
614
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
644
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
615
645
616
646
return 0;
617
647
}
621
651
__attribute__((unused)) const char *txt){}
622
652
623
653
/* Called when a Mandos server is found */
654
__attribute__((nonnull, warn_unused_result))
624
655
static int start_mandos_communication(const char *ip, in_port_t port,
625
656
AvahiIfIndex if_index,
626
int af){
657
int af, mandos_context *mc){
627
658
int ret, tcp_sd = -1;
628
659
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
660
struct sockaddr_storage to;
633
661
char *buffer = NULL;
634
662
char *decrypted_buffer = NULL;
635
663
size_t buffer_length = 0;
659
687
return -1;
660
688
}
661
689
662
ret = init_gnutls_session(&session);
690
/* If the interface is specified and we have a list of interfaces */
691
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
692
/* Check if the interface is one of the interfaces we are using */
693
bool match = false;
694
{
695
char *interface = NULL;
696
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
697
interface))){
698
if(if_nametoindex(interface) == (unsigned int)if_index){
699
match = true;
700
break;
701
}
702
}
703
}
704
if(not match){
705
/* This interface does not match any in the list, so we don't
706
connect to the server */
707
if(debug){
708
char interface[IF_NAMESIZE];
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
711
} else {
712
fprintf_plus(stderr, "Skipping server on non-used interface"
713
" \"%s\"\n",
714
if_indextoname((unsigned int)if_index,
715
interface));
716
}
717
}
718
return -1;
719
}
720
}
721
722
ret = init_gnutls_session(&session, mc);
663
723
if(ret != 0){
664
724
return -1;
665
725
}
684
744
685
745
memset(&to, 0, sizeof(to));
686
746
if(af == AF_INET6){
687
to.in6.sin6_family = (sa_family_t)af;
688
ret = inet_pton(af, ip, &to.in6.sin6_addr);
747
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
748
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
689
749
} else { /* IPv4 */
690
to.in.sin_family = (sa_family_t)af;
691
ret = inet_pton(af, ip, &to.in.sin_addr);
750
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
751
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
692
752
}
693
753
if(ret < 0 ){
694
754
int e = errno;
703
763
goto mandos_end;
704
764
}
705
765
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
707
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
-Wunreachable-code*/
766
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
767
if(IN6_IS_ADDR_LINKLOCAL
768
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
710
769
if(if_index == AVAHI_IF_UNSPEC){
711
770
fprintf_plus(stderr, "An IPv6 link-local address is"
712
771
" incomplete without a network interface\n");
714
773
goto mandos_end;
715
774
}
716
775
/* Set the network interface number as scope */
717
to.in6.sin6_scope_id = (uint32_t)if_index;
776
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
718
777
}
719
778
} else {
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
779
((struct sockaddr_in *)&to)->sin_port = htons(port);
723
780
}
724
781
725
782
if(quit_now){
742
799
}
743
800
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
801
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
746
802
if(af == AF_INET6){
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
806
NI_NUMERICHOST);
749
807
} else {
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
811
NI_NUMERICHOST);
752
812
}
753
if(pcret == NULL){
754
perror_plus("inet_ntop");
755
} else {
756
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
758
}
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
759
819
}
760
820
}
761
821
765
825
}
766
826
767
827
if(af == AF_INET6){
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
769
830
} else {
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
771
833
}
772
834
if(ret < 0){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
774
836
int e = errno;
775
837
perror_plus("connect");
776
838
errno = e;
937
999
if(buffer_length > 0){
938
1000
ssize_t decrypted_buffer_size;
939
1001
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
940
&decrypted_buffer);
1002
&decrypted_buffer, mc);
941
1003
if(decrypted_buffer_size >= 0){
942
1004
943
1005
written = 0;
991
1053
return retval;
992
1054
}
993
1055
1056
__attribute__((nonnull))
994
1057
static void resolve_callback(AvahiSServiceResolver *r,
995
1058
AvahiIfIndex interface,
996
1059
AvahiProtocol proto,
1004
1067
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
1068
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1069
flags,
1007
AVAHI_GCC_UNUSED void* userdata){
1070
void *mc){
1008
1071
if(r == NULL){
1009
1072
return;
1010
1073
}
1013
1076
timed out */
1014
1077
1015
1078
if(quit_now){
1079
avahi_s_service_resolver_free(r);
1016
1080
return;
1017
1081
}
1018
1082
1022
1086
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
1087
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
1088
domain,
1025
avahi_strerror(avahi_server_errno(mc.server)));
1089
avahi_strerror(avahi_server_errno
1090
(((mandos_context*)mc)->server)));
1026
1091
break;
1027
1092
1028
1093
case AVAHI_RESOLVER_FOUND:
1036
1101
}
1037
1102
int ret = start_mandos_communication(ip, (in_port_t)port,
1038
1103
interface,
1039
avahi_proto_to_af(proto));
1104
avahi_proto_to_af(proto),
1105
mc);
1040
1106
if(ret == 0){
1041
avahi_simple_poll_quit(mc.simple_poll);
1107
avahi_simple_poll_quit(simple_poll);
1042
1108
} else {
1043
1109
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto))){
1110
avahi_proto_to_af(proto),
1111
&((mandos_context*)mc)->current_server)){
1045
1112
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1046
1113
" list\n", name);
1047
1114
}
1060
1127
const char *domain,
1061
1128
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1129
flags,
1063
AVAHI_GCC_UNUSED void* userdata){
1130
void *mc){
1064
1131
if(b == NULL){
1065
1132
return;
1066
1133
}
1077
1144
case AVAHI_BROWSER_FAILURE:
1078
1145
1079
1146
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1147
avahi_strerror(avahi_server_errno
1148
(((mandos_context*)mc)->server)));
1149
avahi_simple_poll_quit(simple_poll);
1082
1150
return;
1083
1151
1084
1152
case AVAHI_BROWSER_NEW:
1087
1155
the callback function is called the Avahi server will free the
1088
1156
resolver for us. */
1089
1157
1090
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
name, type, domain, protocol, 0,
1092
resolve_callback, NULL) == NULL)
1158
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1159
interface, protocol, name, type,
1160
domain, protocol, 0,
1161
resolve_callback, mc) == NULL)
1093
1162
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1094
1163
" %s\n", name,
1095
avahi_strerror(avahi_server_errno(mc.server)));
1164
avahi_strerror(avahi_server_errno
1165
(((mandos_context*)mc)->server)));
1096
1166
break;
1097
1167
1098
1168
case AVAHI_BROWSER_REMOVE:
1117
1187
signal_received = sig;
1118
1188
int old_errno = errno;
1119
1189
/* set main loop to exit */
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1190
if(simple_poll != NULL){
1191
avahi_simple_poll_quit(simple_poll);
1122
1192
}
1123
1193
errno = old_errno;
1124
1194
}
1125
1195
1196
__attribute__((nonnull, warn_unused_result))
1126
1197
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1198
int ret;
1128
1199
error_t ret_errno;
1147
1218
return true;
1148
1219
}
1149
1220
1221
__attribute__((nonnull, warn_unused_result))
1150
1222
bool good_flags(const char *ifname, const struct ifreq *ifr){
1151
1223
1152
1224
/* Reject the loopback device */
1194
1266
* corresponds to an acceptable network device.
1195
1267
* (This function is passed to scandir(3) as a filter function.)
1196
1268
*/
1269
__attribute__((nonnull, warn_unused_result))
1197
1270
int good_interface(const struct dirent *if_entry){
1198
1271
if(if_entry->d_name[0] == '.'){
1199
1272
return 0;
1217
1290
/*
1218
1291
* This function determines if a network interface is up.
1219
1292
*/
1293
__attribute__((nonnull, warn_unused_result))
1220
1294
bool interface_is_up(const char *interface){
1221
1295
struct ifreq ifr;
1222
1296
if(not get_flags(interface, &ifr)){
1233
1307
/*
1234
1308
* This function determines if a network interface is running
1235
1309
*/
1310
__attribute__((nonnull, warn_unused_result))
1236
1311
bool interface_is_running(const char *interface){
1237
1312
struct ifreq ifr;
1238
1313
if(not get_flags(interface, &ifr)){
1246
1321
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1247
1322
}
1248
1323
1324
__attribute__((nonnull, pure, warn_unused_result))
1249
1325
int notdotentries(const struct dirent *direntry){
1250
1326
/* Skip "." and ".." */
1251
1327
if(direntry->d_name[0] == '.'
1258
1334
}
1259
1335
1260
1336
/* Is this directory entry a runnable program? */
1337
__attribute__((nonnull, warn_unused_result))
1261
1338
int runnable_hook(const struct dirent *direntry){
1262
1339
int ret;
1263
1340
size_t sret;
1271
1348
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1272
1349
"abcdefghijklmnopqrstuvwxyz"
1273
1350
"0123456789"
1274
"_-");
1351
"_.-");
1275
1352
if((direntry->d_name)[sret] != '\0'){
1276
1353
/* Contains non-allowed characters */
1277
1354
if(debug){
1281
1358
return 0;
1282
1359
}
1283
1360
1284
char *fullname = NULL;
1285
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1286
if(ret < 0){
1287
perror_plus("asprintf");
1288
return 0;
1289
}
1290
1291
ret = stat(fullname, &st);
1361
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1292
1362
if(ret == -1){
1293
1363
if(debug){
1294
1364
perror_plus("Could not stat hook");
1318
1388
return 1;
1319
1389
}
1320
1390
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1391
__attribute__((nonnull, warn_unused_result))
1392
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1393
mandos_context *mc){
1322
1394
int ret;
1323
1395
struct timespec now;
1324
1396
struct timespec waited_time;
1325
1397
intmax_t block_time;
1326
1398
1327
1399
while(true){
1328
if(mc.current_server == NULL){
1329
if (debug){
1400
if(mc->current_server == NULL){
1401
if(debug){
1330
1402
fprintf_plus(stderr, "Wait until first server is found."
1331
1403
" No timeout!\n");
1332
1404
}
1333
1405
ret = avahi_simple_poll_iterate(s, -1);
1334
1406
} else {
1335
if (debug){
1407
if(debug){
1336
1408
fprintf_plus(stderr, "Check current_server if we should run"
1337
1409
" it, or wait\n");
1338
1410
}
1345
1417
/* Calculating in ms how long time between now and server
1346
1418
who we visted longest time ago. Now - last seen. */
1347
1419
waited_time.tv_sec = (now.tv_sec
1348
- mc.current_server->last_seen.tv_sec);
1420
- mc->current_server->last_seen.tv_sec);
1349
1421
waited_time.tv_nsec = (now.tv_nsec
1350
- mc.current_server->last_seen.tv_nsec);
1422
- mc->current_server->last_seen.tv_nsec);
1351
1423
/* total time is 10s/10,000ms.
1352
1424
Converting to s from ms by dividing by 1,000,
1353
1425
and ns to ms by dividing by 1,000,000. */
1355
1427
- ((intmax_t)waited_time.tv_sec * 1000))
1356
1428
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1429
1358
if (debug){
1430
if(debug){
1359
1431
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
1432
block_time);
1361
1433
}
1362
1434
1363
1435
if(block_time <= 0){
1364
ret = start_mandos_communication(mc.current_server->ip,
1365
mc.current_server->port,
1366
mc.current_server->if_index,
1367
mc.current_server->af);
1436
ret = start_mandos_communication(mc->current_server->ip,
1437
mc->current_server->port,
1438
mc->current_server->if_index,
1439
mc->current_server->af, mc);
1368
1440
if(ret == 0){
1369
avahi_simple_poll_quit(mc.simple_poll);
1441
avahi_simple_poll_quit(s);
1370
1442
return 0;
1371
1443
}
1372
1444
ret = clock_gettime(CLOCK_MONOTONIC,
1373
&mc.current_server->last_seen);
1445
&mc->current_server->last_seen);
1374
1446
if(ret == -1){
1375
1447
perror_plus("clock_gettime");
1376
1448
return -1;
1377
1449
}
1378
mc.current_server = mc.current_server->next;
1450
mc->current_server = mc->current_server->next;
1379
1451
block_time = 0; /* Call avahi to find new Mandos
1380
1452
servers, but don't block */
1381
1453
}
1383
1455
ret = avahi_simple_poll_iterate(s, (int)block_time);
1384
1456
}
1385
1457
if(ret != 0){
1386
if (ret > 0 or errno != EINTR){
1458
if(ret > 0 or errno != EINTR){
1387
1459
return (ret != 1) ? ret : 0;
1388
1460
}
1389
1461
}
1391
1463
}
1392
1464
1393
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1394
1467
error_t raise_privileges(void){
1395
1468
error_t old_errno = errno;
1396
1469
error_t ret_errno = 0;
1397
1470
if(seteuid(0) == -1){
1398
1471
ret_errno = errno;
1399
perror_plus("seteuid");
1400
1472
}
1401
1473
errno = old_errno;
1402
1474
return ret_errno;
1403
1475
}
1404
1476
1405
1477
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1406
1479
error_t raise_privileges_permanently(void){
1407
1480
error_t old_errno = errno;
1408
1481
error_t ret_errno = raise_privileges();
1412
1485
}
1413
1486
if(setuid(0) == -1){
1414
1487
ret_errno = errno;
1415
perror_plus("seteuid");
1416
1488
}
1417
1489
errno = old_errno;
1418
1490
return ret_errno;
1419
1491
}
1420
1492
1421
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1422
1495
error_t lower_privileges(void){
1423
1496
error_t old_errno = errno;
1424
1497
error_t ret_errno = 0;
1425
1498
if(seteuid(uid) == -1){
1426
1499
ret_errno = errno;
1427
perror_plus("seteuid");
1428
1500
}
1429
1501
errno = old_errno;
1430
1502
return ret_errno;
1431
1503
}
1432
1504
1433
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1434
1507
error_t lower_privileges_permanently(void){
1435
1508
error_t old_errno = errno;
1436
1509
error_t ret_errno = 0;
1437
1510
if(setuid(uid) == -1){
1438
1511
ret_errno = errno;
1439
perror_plus("setuid");
1440
1512
}
1441
1513
errno = old_errno;
1442
1514
return ret_errno;
1443
1515
}
1444
1516
1445
bool run_network_hooks(const char *mode, const char *interface,
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1446
1519
const float delay){
1447
struct dirent **direntries;
1520
struct dirent **direntries = NULL;
1521
if(hookdir_fd == -1){
1522
hookdir_fd = open(hookdir, O_RDONLY);
1523
if(hookdir_fd == -1){
1524
if(errno == ENOENT){
1525
if(debug){
1526
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1527
" found\n", hookdir);
1528
}
1529
} else {
1530
perror_plus("open");
1531
}
1532
return;
1533
}
1534
}
1535
#ifdef __GLIBC__
1536
#if __GLIBC_PREREQ(2, 15)
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
alphasort);
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
alphasort);
1546
#endif /* not __GLIBC__ */
1547
if(numhooks == -1){
1548
perror_plus("scandir");
1549
return;
1550
}
1448
1551
struct dirent *direntry;
1449
1552
int ret;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
alphasort);
1452
if(numhooks == -1){
1453
if(errno == ENOENT){
1454
if(debug){
1455
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1456
" found\n", hookdir);
1457
}
1458
} else {
1459
perror_plus("scandir");
1553
int devnull = open("/dev/null", O_RDONLY);
1554
for(int i = 0; i < numhooks; i++){
1555
direntry = direntries[i];
1556
if(debug){
1557
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1558
direntry->d_name);
1460
1559
}
1461
} else {
1462
int devnull = open("/dev/null", O_RDONLY);
1463
for(int i = 0; i < numhooks; i++){
1464
direntry = direntries[i];
1465
char *fullname = NULL;
1466
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1467
if(ret < 0){
1560
pid_t hook_pid = fork();
1561
if(hook_pid == 0){
1562
/* Child */
1563
/* Raise privileges */
1564
errno = raise_privileges_permanently();
1565
if(errno != 0){
1566
perror_plus("Failed to raise privileges");
1567
_exit(EX_NOPERM);
1568
}
1569
/* Set group */
1570
errno = 0;
1571
ret = setgid(0);
1572
if(ret == -1){
1573
perror_plus("setgid");
1574
_exit(EX_NOPERM);
1575
}
1576
/* Reset supplementary groups */
1577
errno = 0;
1578
ret = setgroups(0, NULL);
1579
if(ret == -1){
1580
perror_plus("setgroups");
1581
_exit(EX_NOPERM);
1582
}
1583
ret = dup2(devnull, STDIN_FILENO);
1584
if(ret == -1){
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1586
_exit(EX_OSERR);
1587
}
1588
ret = close(devnull);
1589
if(ret == -1){
1590
perror_plus("close");
1591
_exit(EX_OSERR);
1592
}
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
if(ret == -1){
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1596
_exit(EX_OSERR);
1597
}
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1599
if(ret == -1){
1600
perror_plus("setenv");
1601
_exit(EX_OSERR);
1602
}
1603
ret = setenv("DEVICE", interface, 1);
1604
if(ret == -1){
1605
perror_plus("setenv");
1606
_exit(EX_OSERR);
1607
}
1608
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1609
if(ret == -1){
1610
perror_plus("setenv");
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("MODE", mode, 1);
1614
if(ret == -1){
1615
perror_plus("setenv");
1616
_exit(EX_OSERR);
1617
}
1618
char *delaystring;
1619
ret = asprintf(&delaystring, "%f", (double)delay);
1620
if(ret == -1){
1468
1621
perror_plus("asprintf");
1469
continue;
1470
}
1471
if(debug){
1472
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1473
direntry->d_name);
1474
}
1475
pid_t hook_pid = fork();
1476
if(hook_pid == 0){
1477
/* Child */
1478
/* Raise privileges */
1479
raise_privileges_permanently();
1480
/* Set group */
1481
errno = 0;
1482
ret = setgid(0);
1483
if(ret == -1){
1484
perror_plus("setgid");
1485
}
1486
/* Reset supplementary groups */
1487
errno = 0;
1488
ret = setgroups(0, NULL);
1489
if(ret == -1){
1490
perror_plus("setgroups");
1491
}
1492
dup2(devnull, STDIN_FILENO);
1493
close(devnull);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1496
if(ret == -1){
1497
perror_plus("setenv");
1498
_exit(EX_OSERR);
1499
}
1500
ret = setenv("DEVICE", interface, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("MODE", mode, 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
char *delaystring;
1516
ret = asprintf(&delaystring, "%f", delay);
1517
if(ret == -1){
1518
perror_plus("asprintf");
1519
_exit(EX_OSERR);
1520
}
1521
ret = setenv("DELAY", delaystring, 1);
1522
if(ret == -1){
1523
free(delaystring);
1524
perror_plus("setenv");
1525
_exit(EX_OSERR);
1526
}
1622
_exit(EX_OSERR);
1623
}
1624
ret = setenv("DELAY", delaystring, 1);
1625
if(ret == -1){
1527
1626
free(delaystring);
1528
if(connect_to != NULL){
1529
ret = setenv("CONNECT", connect_to, 1);
1530
if(ret == -1){
1531
perror_plus("setenv");
1532
_exit(EX_OSERR);
1533
}
1534
}
1535
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1536
perror_plus("execl");
1537
_exit(EXIT_FAILURE);
1538
}
1627
perror_plus("setenv");
1628
_exit(EX_OSERR);
1629
}
1630
free(delaystring);
1631
if(connect_to != NULL){
1632
ret = setenv("CONNECT", connect_to, 1);
1633
if(ret == -1){
1634
perror_plus("setenv");
1635
_exit(EX_OSERR);
1636
}
1637
}
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1639
if(hook_fd == -1){
1640
perror_plus("openat");
1641
_exit(EXIT_FAILURE);
1642
}
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1644
perror_plus("close");
1645
_exit(EXIT_FAILURE);
1646
}
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1648
environ) == -1){
1649
perror_plus("fexecve");
1650
_exit(EXIT_FAILURE);
1651
}
1652
} else {
1653
if(hook_pid == -1){
1654
perror_plus("fork");
1655
free(direntry);
1656
continue;
1657
}
1658
int status;
1659
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1660
perror_plus("waitpid");
1661
free(direntry);
1662
continue;
1663
}
1664
if(WIFEXITED(status)){
1665
if(WEXITSTATUS(status) != 0){
1666
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1667
" with status %d\n", direntry->d_name,
1668
WEXITSTATUS(status));
1669
free(direntry);
1670
continue;
1671
}
1672
} else if(WIFSIGNALED(status)){
1673
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1674
" signal %d\n", direntry->d_name,
1675
WTERMSIG(status));
1676
free(direntry);
1677
continue;
1539
1678
} else {
1540
int status;
1541
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1542
perror_plus("waitpid");
1543
free(fullname);
1544
continue;
1545
}
1546
if(WIFEXITED(status)){
1547
if(WEXITSTATUS(status) != 0){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1549
" with status %d\n", direntry->d_name,
1550
WEXITSTATUS(status));
1551
free(fullname);
1552
continue;
1553
}
1554
} else if(WIFSIGNALED(status)){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1556
" signal %d\n", direntry->d_name,
1557
WTERMSIG(status));
1558
free(fullname);
1559
continue;
1560
} else {
1561
fprintf_plus(stderr, "Warning: network hook \"%s\""
1562
" crashed\n", direntry->d_name);
1563
free(fullname);
1564
continue;
1565
}
1566
}
1567
free(fullname);
1568
if(debug){
1569
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1570
direntry->d_name);
1571
}
1572
}
1573
close(devnull);
1574
}
1575
return true;
1679
fprintf_plus(stderr, "Warning: network hook \"%s\""
1680
" crashed\n", direntry->d_name);
1681
free(direntry);
1682
continue;
1683
}
1684
}
1685
if(debug){
1686
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1687
direntry->d_name);
1688
}
1689
free(direntry);
1690
}
1691
free(direntries);
1692
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1693
perror_plus("close");
1694
} else {
1695
hookdir_fd = -1;
1696
}
1697
close(devnull);
1576
1698
}
1577
1699
1700
__attribute__((nonnull, warn_unused_result))
1578
1701
error_t bring_up_interface(const char *const interface,
1579
1702
const float delay){
1580
int sd = -1;
1581
1703
error_t old_errno = errno;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1704
int ret;
1584
1705
struct ifreq network;
1585
1706
unsigned int if_index = if_nametoindex(interface);
1586
1707
if(if_index == 0){
1595
1716
}
1596
1717
1597
1718
if(not interface_is_up(interface)){
1598
if(not get_flags(interface, &network) and debug){
1719
error_t ret_errno = 0, ioctl_errno = 0;
1720
if(not get_flags(interface, &network)){
1599
1721
ret_errno = errno;
1600
1722
fprintf_plus(stderr, "Failed to get flags for interface "
1601
1723
"\"%s\"\n", interface);
1724
errno = old_errno;
1602
1725
return ret_errno;
1603
1726
}
1604
network.ifr_flags |= IFF_UP;
1727
network.ifr_flags |= IFF_UP; /* set flag */
1605
1728
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1729
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1730
if(sd == -1){
1608
1731
ret_errno = errno;
1609
1732
perror_plus("socket");
1610
1733
errno = old_errno;
1611
1734
return ret_errno;
1612
1735
}
1613
1736
1614
1737
if(quit_now){
1615
close(sd);
1738
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1739
if(ret == -1){
1740
perror_plus("close");
1741
}
1616
1742
errno = old_errno;
1617
1743
return EINTR;
1618
1744
}
1622
1748
interface);
1623
1749
}
1624
1750
1625
/* Raise priviliges */
1626
raise_privileges();
1751
/* Raise privileges */
1752
ret_errno = raise_privileges();
1753
if(ret_errno != 0){
1754
errno = ret_errno;
1755
perror_plus("Failed to raise privileges");
1756
}
1627
1757
1628
1758
#ifdef __linux__
1629
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1630
messages about the network interface to mess up the prompt */
1631
int ret_linux = klogctl(8, NULL, 5);
1632
bool restore_loglevel = true;
1633
if(ret_linux == -1){
1634
restore_loglevel = false;
1635
perror_plus("klogctl");
1759
int ret_linux;
1760
bool restore_loglevel = false;
1761
if(ret_errno == 0){
1762
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1763
messages about the network interface to mess up the prompt */
1764
ret_linux = klogctl(8, NULL, 5);
1765
if(ret_linux == -1){
1766
perror_plus("klogctl");
1767
} else {
1768
restore_loglevel = true;
1769
}
1636
1770
}
1637
1771
#endif /* __linux__ */
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1772
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1773
ioctl_errno = errno;
1640
1774
#ifdef __linux__
1641
1775
if(restore_loglevel){
1642
1776
ret_linux = klogctl(7, NULL, 0);
1646
1780
}
1647
1781
#endif /* __linux__ */
1648
1782
1649
/* Lower privileges */
1650
lower_privileges();
1783
/* If raise_privileges() succeeded above */
1784
if(ret_errno == 0){
1785
/* Lower privileges */
1786
ret_errno = lower_privileges();
1787
if(ret_errno != 0){
1788
errno = ret_errno;
1789
perror_plus("Failed to lower privileges");
1790
}
1791
}
1651
1792
1652
1793
/* Close the socket */
1653
1794
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1656
1797
}
1657
1798
1658
1799
if(ret_setflags == -1){
1659
errno = ret_errno;
1800
errno = ioctl_errno;
1660
1801
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1661
1802
errno = old_errno;
1662
return ret_errno;
1803
return ioctl_errno;
1663
1804
}
1664
1805
} else if(debug){
1665
1806
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1683
1824
return 0;
1684
1825
}
1685
1826
1827
__attribute__((nonnull, warn_unused_result))
1686
1828
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1688
1829
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1691
1830
struct ifreq network;
1692
1831
unsigned int if_index = if_nametoindex(interface);
1693
1832
if(if_index == 0){
1696
1835
return ENXIO;
1697
1836
}
1698
1837
if(interface_is_up(interface)){
1838
error_t ret_errno = 0, ioctl_errno = 0;
1699
1839
if(not get_flags(interface, &network) and debug){
1700
1840
ret_errno = errno;
1701
1841
fprintf_plus(stderr, "Failed to get flags for interface "
1702
1842
"\"%s\"\n", interface);
1843
errno = old_errno;
1703
1844
return ret_errno;
1704
1845
}
1705
1846
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1706
1847
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1848
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1849
if(sd == -1){
1709
1850
ret_errno = errno;
1710
1851
perror_plus("socket");
1711
1852
errno = old_errno;
1717
1858
interface);
1718
1859
}
1719
1860
1720
/* Raise priviliges */
1721
raise_privileges();
1722
1723
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1724
ret_errno = errno;
1725
1726
/* Lower privileges */
1727
lower_privileges();
1861
/* Raise privileges */
1862
ret_errno = raise_privileges();
1863
if(ret_errno != 0){
1864
errno = ret_errno;
1865
perror_plus("Failed to raise privileges");
1866
}
1867
1868
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1869
ioctl_errno = errno;
1870
1871
/* If raise_privileges() succeeded above */
1872
if(ret_errno == 0){
1873
/* Lower privileges */
1874
ret_errno = lower_privileges();
1875
if(ret_errno != 0){
1876
errno = ret_errno;
1877
perror_plus("Failed to lower privileges");
1878
}
1879
}
1728
1880
1729
1881
/* Close the socket */
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1882
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1731
1883
if(ret == -1){
1732
1884
perror_plus("close");
1733
1885
}
1734
1886
1735
1887
if(ret_setflags == -1){
1736
errno = ret_errno;
1888
errno = ioctl_errno;
1737
1889
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
1890
errno = old_errno;
1739
return ret_errno;
1891
return ioctl_errno;
1740
1892
}
1741
1893
} else if(debug){
1742
1894
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1748
1900
}
1749
1901
1750
1902
int main(int argc, char *argv[]){
1903
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1904
.priority = "SECURE256:!CTYPE-X.509:"
1905
"+CTYPE-OPENPGP", .current_server = NULL,
1906
.interfaces = NULL, .interfaces_size = 0 };
1751
1907
AvahiSServiceBrowser *sb = NULL;
1752
1908
error_t ret_errno;
1753
1909
int ret;
1754
1910
intmax_t tmpmax;
1755
1911
char *tmp;
1756
1912
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1759
1913
char *interfaces_to_take_down = NULL;
1760
1914
size_t interfaces_to_take_down_size = 0;
1761
char tempdir[] = "/tmp/mandosXXXXXX";
1762
bool tempdir_created = false;
1915
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1916
char old_tempdir[] = "/tmp/mandosXXXXXX";
1917
char *tempdir = NULL;
1763
1918
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1764
1919
const char *seckey = PATHDIR "/" SECKEY;
1765
1920
const char *pubkey = PATHDIR "/" PUBKEY;
1766
1921
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1768
1922
1769
1923
bool gnutls_initialized = false;
1770
1924
bool gpgme_initialized = false;
1861
2015
connect_to = arg;
1862
2016
break;
1863
2017
case 'i': /* --interface */
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
2018
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2019
arg, (int)',');
1866
2020
if(ret_errno != 0){
1867
2021
argp_error(state, "%s", strerror(ret_errno));
1868
2022
}
1948
2102
/* Work around Debian bug #633582:
1949
2103
<http://bugs.debian.org/633582> */
1950
2104
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
2105
/* Re-raise privileges */
2106
ret_errno = raise_privileges();
2107
if(ret_errno != 0){
2108
errno = ret_errno;
2109
perror_plus("Failed to raise privileges");
2110
} else {
1953
2111
struct stat st;
1954
2112
1955
2113
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1995
2153
}
1996
2154
1997
2155
/* Lower privileges */
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2156
ret_errno = lower_privileges();
2157
if(ret_errno != 0){
2158
errno = ret_errno;
2159
perror_plus("Failed to lower privileges");
2002
2160
}
2003
2161
}
2004
2162
}
2005
2163
2006
/* Remove empty interface names */
2164
/* Remove invalid interface names (except "none") */
2007
2165
{
2008
2166
char *interface = NULL;
2009
while((interface = argz_next(interfaces, interfaces_size,
2167
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2010
2168
interface))){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2169
if(strcmp(interface, "none") != 0
2170
and if_nametoindex(interface) == 0){
2171
if(interface[0] != '\0'){
2013
2172
fprintf_plus(stderr, "Not using nonexisting interface"
2014
2173
" \"%s\"\n", interface);
2015
2174
}
2016
argz_delete(&interfaces, &interfaces_size, interface);
2175
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2017
2176
interface = NULL;
2018
2177
}
2019
2178
}
2021
2180
2022
2181
/* Run network hooks */
2023
2182
{
2024
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2183
if(mc.interfaces != NULL){
2184
interfaces_hooks = malloc(mc.interfaces_size);
2027
2185
if(interfaces_hooks == NULL){
2028
2186
perror_plus("malloc");
2029
2187
goto end;
2030
2188
}
2031
memcpy(interfaces_hooks, interfaces, interfaces_size);
2032
interfaces_hooks_size = interfaces_size;
2033
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2034
(int)',');
2035
}
2036
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2037
interfaces_hooks : "", delay)){
2038
goto end;
2039
}
2189
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2190
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2191
}
2192
run_network_hooks("start", interfaces_hooks != NULL ?
2193
interfaces_hooks : "", delay);
2040
2194
}
2041
2195
2042
2196
if(not debug){
2047
2201
from the signal handler */
2048
2202
/* Initialize the pseudo-RNG for Avahi */
2049
2203
srand((unsigned int) time(NULL));
2050
mc.simple_poll = avahi_simple_poll_new();
2051
if(mc.simple_poll == NULL){
2204
simple_poll = avahi_simple_poll_new();
2205
if(simple_poll == NULL){
2052
2206
fprintf_plus(stderr,
2053
2207
"Avahi: Failed to create simple poll object.\n");
2054
2208
exitcode = EX_UNAVAILABLE;
2119
2273
}
2120
2274
2121
2275
/* If no interfaces were specified, make a list */
2122
if(interfaces == NULL){
2123
struct dirent **direntries;
2276
if(mc.interfaces == NULL){
2277
struct dirent **direntries = NULL;
2124
2278
/* Look for any good interfaces */
2125
2279
ret = scandir(sys_class_net, &direntries, good_interface,
2126
2280
alphasort);
2127
2281
if(ret >= 1){
2128
2282
/* Add all found interfaces to interfaces list */
2129
2283
for(int i = 0; i < ret; ++i){
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2284
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2131
2285
direntries[i]->d_name);
2132
2286
if(ret_errno != 0){
2287
errno = ret_errno;
2133
2288
perror_plus("argz_add");
2289
free(direntries[i]);
2134
2290
continue;
2135
2291
}
2136
2292
if(debug){
2137
2293
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2138
2294
direntries[i]->d_name);
2139
2295
}
2296
free(direntries[i]);
2140
2297
}
2141
2298
free(direntries);
2142
2299
} else {
2143
free(direntries);
2300
if(ret == 0){
2301
free(direntries);
2302
}
2144
2303
fprintf_plus(stderr, "Could not find a network interface\n");
2145
2304
exitcode = EXIT_FAILURE;
2146
2305
goto end;
2147
2306
}
2148
2307
}
2149
2308
2150
/* If we only got one interface, explicitly use only that one */
2151
if(argz_count(interfaces, interfaces_size) == 1){
2152
if(debug){
2153
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2154
interfaces);
2155
}
2156
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2157
}
2158
2159
/* Bring up interfaces which are down */
2160
if(not (argz_count(interfaces, interfaces_size) == 1
2161
and strcmp(interfaces, "none") == 0)){
2309
/* Bring up interfaces which are down, and remove any "none"s */
2310
{
2162
2311
char *interface = NULL;
2163
while((interface = argz_next(interfaces, interfaces_size,
2312
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2164
2313
interface))){
2314
/* If interface name is "none", stop bringing up interfaces.
2315
Also remove all instances of "none" from the list */
2316
if(strcmp(interface, "none") == 0){
2317
argz_delete(&mc.interfaces, &mc.interfaces_size,
2318
interface);
2319
interface = NULL;
2320
while((interface = argz_next(mc.interfaces,
2321
mc.interfaces_size, interface))){
2322
if(strcmp(interface, "none") == 0){
2323
argz_delete(&mc.interfaces, &mc.interfaces_size,
2324
interface);
2325
interface = NULL;
2326
}
2327
}
2328
break;
2329
}
2165
2330
bool interface_was_up = interface_is_up(interface);
2166
ret = bring_up_interface(interface, delay);
2331
errno = bring_up_interface(interface, delay);
2167
2332
if(not interface_was_up){
2168
if(ret != 0){
2169
errno = ret;
2333
if(errno != 0){
2170
2334
perror_plus("Failed to bring up interface");
2171
2335
} else {
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2174
interface);
2336
errno = argz_add(&interfaces_to_take_down,
2337
&interfaces_to_take_down_size,
2338
interface);
2339
if(errno != 0){
2340
perror_plus("argz_add");
2341
}
2175
2342
}
2176
2343
}
2177
2344
}
2178
free(interfaces);
2179
interfaces = NULL;
2180
interfaces_size = 0;
2181
2345
if(debug and (interfaces_to_take_down == NULL)){
2182
2346
fprintf_plus(stderr, "No interfaces were brought up\n");
2183
2347
}
2184
2348
}
2185
2349
2350
/* If we only got one interface, explicitly use only that one */
2351
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2352
if(debug){
2353
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2354
mc.interfaces);
2355
}
2356
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2357
}
2358
2186
2359
if(quit_now){
2187
2360
goto end;
2188
2361
}
2189
2362
2190
ret = init_gnutls_global(pubkey, seckey);
2363
ret = init_gnutls_global(pubkey, seckey, &mc);
2191
2364
if(ret == -1){
2192
2365
fprintf_plus(stderr, "init_gnutls_global failed\n");
2193
2366
exitcode = EX_UNAVAILABLE;
2200
2373
goto end;
2201
2374
}
2202
2375
2203
if(mkdtemp(tempdir) == NULL){
2376
/* Try /run/tmp before /tmp */
2377
tempdir = mkdtemp(run_tempdir);
2378
if(tempdir == NULL and errno == ENOENT){
2379
if(debug){
2380
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2381
run_tempdir, old_tempdir);
2382
}
2383
tempdir = mkdtemp(old_tempdir);
2384
}
2385
if(tempdir == NULL){
2204
2386
perror_plus("mkdtemp");
2205
2387
goto end;
2206
2388
}
2207
tempdir_created = true;
2208
2389
2209
2390
if(quit_now){
2210
2391
goto end;
2211
2392
}
2212
2393
2213
if(not init_gpgme(pubkey, seckey, tempdir)){
2394
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2214
2395
fprintf_plus(stderr, "init_gpgme failed\n");
2215
2396
exitcode = EX_UNAVAILABLE;
2216
2397
goto end;
2246
2427
exitcode = EX_USAGE;
2247
2428
goto end;
2248
2429
}
2249
2430
2250
2431
if(quit_now){
2251
2432
goto end;
2252
2433
}
2273
2454
}
2274
2455
2275
2456
while(not quit_now){
2276
ret = start_mandos_communication(address, port, if_index, af);
2457
ret = start_mandos_communication(address, port, if_index, af,
2458
&mc);
2277
2459
if(quit_now or ret == 0){
2278
2460
break;
2279
2461
}
2281
2463
fprintf_plus(stderr, "Retrying in %d seconds\n",
2282
2464
(int)retry_interval);
2283
2465
}
2284
sleep((int)retry_interval);
2466
sleep((unsigned int)retry_interval);
2285
2467
}
2286
2468
2287
if (not quit_now){
2469
if(not quit_now){
2288
2470
exitcode = EXIT_SUCCESS;
2289
2471
}
2290
2472
2305
2487
config.publish_domain = 0;
2306
2488
2307
2489
/* Allocate a new server */
2308
mc.server = avahi_server_new(avahi_simple_poll_get
2309
(mc.simple_poll), &config, NULL,
2310
NULL, &ret_errno);
2490
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2491
&config, NULL, NULL, &ret_errno);
2311
2492
2312
2493
/* Free the Avahi configuration data */
2313
2494
avahi_server_config_free(&config);
2328
2509
/* Create the Avahi service browser */
2329
2510
sb = avahi_s_service_browser_new(mc.server, if_index,
2330
2511
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2331
NULL, 0, browse_callback, NULL);
2512
NULL, 0, browse_callback,
2513
(void *)&mc);
2332
2514
if(sb == NULL){
2333
2515
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2334
2516
avahi_strerror(avahi_server_errno(mc.server)));
2345
2527
if(debug){
2346
2528
fprintf_plus(stderr, "Starting Avahi loop search\n");
2347
2529
}
2348
2349
ret = avahi_loop_with_timeout(mc.simple_poll,
2350
(int)(retry_interval * 1000));
2530
2531
ret = avahi_loop_with_timeout(simple_poll,
2532
(int)(retry_interval * 1000), &mc);
2351
2533
if(debug){
2352
2534
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2353
2535
(ret == 0) ? "successfully" : "with error");
2360
2542
}
2361
2543
2362
2544
/* Cleanup things */
2545
free(mc.interfaces);
2546
2363
2547
if(sb != NULL)
2364
2548
avahi_s_service_browser_free(sb);
2365
2549
2366
2550
if(mc.server != NULL)
2367
2551
avahi_server_free(mc.server);
2368
2552
2369
if(mc.simple_poll != NULL)
2370
avahi_simple_poll_free(mc.simple_poll);
2553
if(simple_poll != NULL)
2554
avahi_simple_poll_free(simple_poll);
2371
2555
2372
2556
if(gnutls_initialized){
2373
2557
gnutls_certificate_free_credentials(mc.cred);
2385
2569
mc.current_server->prev->next = NULL;
2386
2570
while(mc.current_server != NULL){
2387
2571
server *next = mc.current_server->next;
2572
#ifdef __GNUC__
2573
#pragma GCC diagnostic push
2574
#pragma GCC diagnostic ignored "-Wcast-qual"
2575
#endif
2576
free((char *)(mc.current_server->ip));
2577
#ifdef __GNUC__
2578
#pragma GCC diagnostic pop
2579
#endif
2388
2580
free(mc.current_server);
2389
2581
mc.current_server = next;
2390
2582
}
2391
2583
}
2392
2584
2393
/* Re-raise priviliges */
2585
/* Re-raise privileges */
2394
2586
{
2395
raise_privileges();
2396
2397
/* Run network hooks */
2398
run_network_hooks("stop", interfaces_hooks != NULL ?
2399
interfaces_hooks : "", delay);
2400
2401
/* Take down the network interfaces which were brought up */
2402
{
2403
char *interface = NULL;
2404
while((interface=argz_next(interfaces_to_take_down,
2405
interfaces_to_take_down_size,
2406
interface))){
2407
ret_errno = take_down_interface(interface);
2408
if(ret_errno != 0){
2409
errno = ret_errno;
2410
perror_plus("Failed to take down interface");
2411
}
2412
}
2413
if(debug and (interfaces_to_take_down == NULL)){
2414
fprintf_plus(stderr, "No interfaces needed to be taken"
2415
" down\n");
2416
}
2417
}
2418
2419
lower_privileges_permanently();
2587
ret_errno = raise_privileges();
2588
if(ret_errno != 0){
2589
errno = ret_errno;
2590
perror_plus("Failed to raise privileges");
2591
} else {
2592
2593
/* Run network hooks */
2594
run_network_hooks("stop", interfaces_hooks != NULL ?
2595
interfaces_hooks : "", delay);
2596
2597
/* Take down the network interfaces which were brought up */
2598
{
2599
char *interface = NULL;
2600
while((interface=argz_next(interfaces_to_take_down,
2601
interfaces_to_take_down_size,
2602
interface))){
2603
ret_errno = take_down_interface(interface);
2604
if(ret_errno != 0){
2605
errno = ret_errno;
2606
perror_plus("Failed to take down interface");
2607
}
2608
}
2609
if(debug and (interfaces_to_take_down == NULL)){
2610
fprintf_plus(stderr, "No interfaces needed to be taken"
2611
" down\n");
2612
}
2613
}
2614
}
2615
2616
ret_errno = lower_privileges_permanently();
2617
if(ret_errno != 0){
2618
errno = ret_errno;
2619
perror_plus("Failed to lower privileges permanently");
2620
}
2420
2621
}
2421
2622
2422
2623
free(interfaces_to_take_down);
2423
2624
free(interfaces_hooks);
2424
2625
2425
2626
/* Removes the GPGME temp directory and all files inside */
2426
if(tempdir_created){
2627
if(tempdir != NULL){
2427
2628
struct dirent **direntries = NULL;
2428
struct dirent *direntry = NULL;
2429
int numentries = scandir(tempdir, &direntries, notdotentries,
2430
alphasort);
2431
if (numentries > 0){
2432
for(int i = 0; i < numentries; i++){
2433
direntry = direntries[i];
2434
char *fullname = NULL;
2435
ret = asprintf(&fullname, "%s/%s", tempdir,
2436
direntry->d_name);
2437
if(ret < 0){
2438
perror_plus("asprintf");
2439
continue;
2440
}
2441
ret = remove(fullname);
2442
if(ret == -1){
2443
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2444
strerror(errno));
2445
}
2446
free(fullname);
2629
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2630
O_NOFOLLOW));
2631
if(tempdir_fd == -1){
2632
perror_plus("open");
2633
} else {
2634
#ifdef __GLIBC__
2635
#if __GLIBC_PREREQ(2, 15)
2636
int numentries = scandirat(tempdir_fd, ".", &direntries,
2637
notdotentries, alphasort);
2638
#else /* not __GLIBC_PREREQ(2, 15) */
2639
int numentries = scandir(tempdir, &direntries, notdotentries,
2640
alphasort);
2641
#endif /* not __GLIBC_PREREQ(2, 15) */
2642
#else /* not __GLIBC__ */
2643
int numentries = scandir(tempdir, &direntries, notdotentries,
2644
alphasort);
2645
#endif /* not __GLIBC__ */
2646
if(numentries >= 0){
2647
for(int i = 0; i < numentries; i++){
2648
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2649
if(ret == -1){
2650
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2651
" \"%s\", 0): %s\n", tempdir,
2652
direntries[i]->d_name, strerror(errno));
2653
}
2654
free(direntries[i]);
2655
}
2656
2657
/* need to clean even if 0 because man page doesn't specify */
2658
free(direntries);
2659
if(numentries == -1){
2660
perror_plus("scandir");
2661
}
2662
ret = rmdir(tempdir);
2663
if(ret == -1 and errno != ENOENT){
2664
perror_plus("rmdir");
2665
}
2447
2666
}
2448
}
2449
2450
/* need to clean even if 0 because man page doesn't specify */
2451
free(direntries);
2452
if (numentries == -1){
2453
perror_plus("scandir");
2454
}
2455
ret = rmdir(tempdir);
2456
if(ret == -1 and errno != ENOENT){
2457
perror_plus("rmdir");
2667
TEMP_FAILURE_RETRY(close(tempdir_fd));
2458
2668
}
2459
2669
}
2460
2670
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0