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237.7.146
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2012-06-14 21:42:44 UTC
- mto: (301.1.1 release) (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 302.
- Revision ID: teddy@recompile.se-20120614214244-meh2hr7pg0p0fek2
* plugins.d/mandos-client.c: Only print message about nonexisting
network hook directory in debug mode.
network hook directory in debug mode.
- files removed:
- debian/upstream
- 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 © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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() */
43
stdout, ferror(), remove() */
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
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,
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
79
77
#include <iso646.h> /* not, or, and */
80
78
#include <argp.h> /* struct argp_option, error_t, struct
81
79
argp_state, struct argp,
93
91
argz_delete(), argz_append(),
94
92
argz_stringify(), argz_add(),
95
93
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
98
94
99
95
#ifdef __linux__
100
96
#include <sys/klog.h> /* klogctl() */
142
138
static const char sys_class_net[] = "/sys/class/net";
143
139
char *connect_to = NULL;
144
140
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
141
uid_t uid = 65534;
147
142
gid_t gid = 65534;
148
143
159
154
160
155
/* Used for passing in values through the Avahi callback functions */
161
156
typedef struct {
157
AvahiSimplePoll *simple_poll;
162
158
AvahiServer *server;
163
159
gnutls_certificate_credentials_t cred;
164
160
unsigned int dh_bits;
166
162
const char *priority;
167
163
gpgme_ctx_t ctx;
168
164
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
171
165
} mandos_context;
172
166
173
/* global so signal handler can reach it*/
174
AvahiSimplePoll *simple_poll;
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 };
175
172
176
173
sig_atomic_t quit_now = 0;
177
174
int signal_received = 0;
185
182
perror(print_text);
186
183
}
187
184
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
185
__attribute__((format (gnu_printf, 2, 3)))
189
186
int fprintf_plus(FILE *stream, const char *format, ...){
190
187
va_list ap;
191
188
va_start (ap, format);
192
189
193
190
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
191
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
192
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
193
}
197
194
198
195
/*
200
197
* bytes. "buffer_capacity" is how much is currently allocated,
201
198
* "buffer_length" is how much is already used.
202
199
*/
203
__attribute__((nonnull, warn_unused_result))
204
200
size_t incbuffer(char **buffer, size_t buffer_length,
205
201
size_t buffer_capacity){
206
202
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;
203
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
204
if(buffer == NULL){
213
205
return 0;
214
206
}
215
*buffer = new_buf;
216
207
buffer_capacity += BUFFER_SIZE;
217
208
}
218
209
return buffer_capacity;
219
210
}
220
211
221
212
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
213
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
int af, server **current_server){
214
int af){
225
215
int ret;
226
216
server *new_server = malloc(sizeof(server));
227
217
if(new_server == NULL){
234
224
.af = af };
235
225
if(new_server->ip == NULL){
236
226
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
227
return false;
253
228
}
254
229
/* Special case of first server */
255
if(*current_server == NULL){
230
if (mc.current_server == NULL){
256
231
new_server->next = new_server;
257
232
new_server->prev = new_server;
258
*current_server = new_server;
233
mc.current_server = new_server;
234
/* Place the new server last in the list */
259
235
} else {
260
/* Place the new server last in the list */
261
new_server->next = *current_server;
262
new_server->prev = (*current_server)->prev;
236
new_server->next = mc.current_server;
237
new_server->prev = mc.current_server->prev;
263
238
new_server->prev->next = new_server;
264
(*current_server)->prev = 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;
265
245
}
266
246
return true;
267
247
}
269
249
/*
270
250
* Initialize GPGME.
271
251
*/
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){
252
static bool init_gpgme(const char *seckey, const char *pubkey,
253
const char *tempdir){
277
254
gpgme_error_t rc;
278
255
gpgme_engine_info_t engine_info;
279
256
257
280
258
/*
281
259
* Helper function to insert pub and seckey to the engine keyring.
282
260
*/
283
bool import_key(const char * const filename){
261
bool import_key(const char *filename){
284
262
int ret;
285
263
int fd;
286
264
gpgme_data_t pgp_data;
298
276
return false;
299
277
}
300
278
301
rc = gpgme_op_import(mc->ctx, pgp_data);
279
rc = gpgme_op_import(mc.ctx, pgp_data);
302
280
if(rc != GPG_ERR_NO_ERROR){
303
281
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
304
282
gpgme_strsource(rc), gpgme_strerror(rc));
348
326
}
349
327
350
328
/* Create new GPGME "context" */
351
rc = gpgme_new(&(mc->ctx));
329
rc = gpgme_new(&(mc.ctx));
352
330
if(rc != GPG_ERR_NO_ERROR){
353
331
fprintf_plus(stderr, "Mandos plugin mandos-client: "
354
332
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
367
345
* Decrypt OpenPGP data.
368
346
* Returns -1 on error
369
347
*/
370
__attribute__((nonnull, warn_unused_result))
371
348
static ssize_t pgp_packet_decrypt(const char *cryptotext,
372
349
size_t crypto_size,
373
char **plaintext,
374
mandos_context *mc){
350
char **plaintext){
375
351
gpgme_data_t dh_crypto, dh_plain;
376
352
gpgme_error_t rc;
377
353
ssize_t ret;
403
379
404
380
/* Decrypt data from the cryptotext data buffer to the plaintext
405
381
data buffer */
406
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
382
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
407
383
if(rc != GPG_ERR_NO_ERROR){
408
384
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
409
385
gpgme_strsource(rc), gpgme_strerror(rc));
410
386
plaintext_length = -1;
411
387
if(debug){
412
388
gpgme_decrypt_result_t result;
413
result = gpgme_op_decrypt_result(mc->ctx);
389
result = gpgme_op_decrypt_result(mc.ctx);
414
390
if(result == NULL){
415
391
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
416
392
} else {
493
469
return plaintext_length;
494
470
}
495
471
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){
472
static const char * safer_gnutls_strerror(int value){
505
473
const char *ret = gnutls_strerror(value);
506
return safe_string(ret);
474
if(ret == NULL)
475
ret = "(unknown)";
476
return ret;
507
477
}
508
478
509
479
/* GnuTLS log function callback */
510
__attribute__((nonnull))
511
480
static void debuggnutls(__attribute__((unused)) int level,
512
481
const char* string){
513
482
fprintf_plus(stderr, "GnuTLS: %s", string);
514
483
}
515
484
516
__attribute__((nonnull, warn_unused_result))
517
485
static int init_gnutls_global(const char *pubkeyfilename,
518
const char *seckeyfilename,
519
mandos_context *mc){
486
const char *seckeyfilename){
520
487
int ret;
521
unsigned int uret;
522
488
523
489
if(debug){
524
490
fprintf_plus(stderr, "Initializing GnuTLS\n");
540
506
}
541
507
542
508
/* OpenPGP credentials */
543
ret = gnutls_certificate_allocate_credentials(&mc->cred);
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
544
510
if(ret != GNUTLS_E_SUCCESS){
545
511
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
546
512
safer_gnutls_strerror(ret));
556
522
}
557
523
558
524
ret = gnutls_certificate_set_openpgp_key_file
559
(mc->cred, pubkeyfilename, seckeyfilename,
525
(mc.cred, pubkeyfilename, seckeyfilename,
560
526
GNUTLS_OPENPGP_FMT_BASE64);
561
527
if(ret != GNUTLS_E_SUCCESS){
562
528
fprintf_plus(stderr,
568
534
}
569
535
570
536
/* GnuTLS server initialization */
571
ret = gnutls_dh_params_init(&mc->dh_params);
537
ret = gnutls_dh_params_init(&mc.dh_params);
572
538
if(ret != GNUTLS_E_SUCCESS){
573
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
574
540
" initialization: %s\n",
575
541
safer_gnutls_strerror(ret));
576
542
goto globalfail;
577
543
}
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
{
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
585
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
590
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
593
break;
594
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
596
BUFFER_SIZE);
597
/* EOF */
598
if(bytes_read == 0){
599
break;
600
}
601
/* check bytes_read for failure */
602
if(bytes_read < 0){
603
perror_plus("read");
604
free(buffer.data);
605
buffer.data = NULL;
606
break;
607
}
608
buffer.size += (unsigned int)bytes_read;
609
}
610
close(secfile);
611
}
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
615
{
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
621
free(buffer.data);
622
buffer.data = NULL;
623
} else {
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
626
"", 0);
627
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
629
safer_gnutls_strerror(ret));
630
privkey = NULL;
631
}
632
free(buffer.data);
633
buffer.data = NULL;
634
if(privkey != NULL){
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
638
if(debug){
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
642
(sec_param)));
643
}
644
}
645
}
646
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
650
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
653
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
655
}
656
}
657
}
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
if(uret != 0){
660
mc->dh_bits = uret;
661
if(debug){
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
664
safe_string(gnutls_sec_param_get_name
665
(sec_param)),
666
mc->dh_bits);
667
}
668
} else {
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
672
safer_gnutls_strerror(ret));
673
goto globalfail;
674
}
675
} else if(debug){
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
mc->dh_bits);
678
}
679
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
680
545
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
safer_gnutls_strerror(ret));
683
548
goto globalfail;
684
549
}
685
550
686
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
687
552
688
553
return 0;
689
554
690
555
globalfail:
691
556
692
gnutls_certificate_free_credentials(mc->cred);
557
gnutls_certificate_free_credentials(mc.cred);
693
558
gnutls_global_deinit();
694
gnutls_dh_params_deinit(mc->dh_params);
559
gnutls_dh_params_deinit(mc.dh_params);
695
560
return -1;
696
561
}
697
562
698
__attribute__((nonnull, warn_unused_result))
699
static int init_gnutls_session(gnutls_session_t *session,
700
mandos_context *mc){
563
static int init_gnutls_session(gnutls_session_t *session){
701
564
int ret;
702
565
/* GnuTLS session creation */
703
566
do {
715
578
{
716
579
const char *err;
717
580
do {
718
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
581
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
719
582
if(quit_now){
720
583
gnutls_deinit(*session);
721
584
return -1;
732
595
733
596
do {
734
597
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
735
mc->cred);
598
mc.cred);
736
599
if(quit_now){
737
600
gnutls_deinit(*session);
738
601
return -1;
748
611
/* ignore client certificate if any. */
749
612
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
750
613
751
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
614
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
752
615
753
616
return 0;
754
617
}
758
621
__attribute__((unused)) const char *txt){}
759
622
760
623
/* Called when a Mandos server is found */
761
__attribute__((nonnull, warn_unused_result))
762
624
static int start_mandos_communication(const char *ip, in_port_t port,
763
625
AvahiIfIndex if_index,
764
int af, mandos_context *mc){
626
int af){
765
627
int ret, tcp_sd = -1;
766
628
ssize_t sret;
767
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
768
633
char *buffer = NULL;
769
634
char *decrypted_buffer = NULL;
770
635
size_t buffer_length = 0;
794
659
return -1;
795
660
}
796
661
797
/* If the interface is specified and we have a list of interfaces */
798
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
799
/* Check if the interface is one of the interfaces we are using */
800
bool match = false;
801
{
802
char *interface = NULL;
803
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
804
interface))){
805
if(if_nametoindex(interface) == (unsigned int)if_index){
806
match = true;
807
break;
808
}
809
}
810
}
811
if(not match){
812
/* This interface does not match any in the list, so we don't
813
connect to the server */
814
if(debug){
815
char interface[IF_NAMESIZE];
816
if(if_indextoname((unsigned int)if_index, interface) == NULL){
817
perror_plus("if_indextoname");
818
} else {
819
fprintf_plus(stderr, "Skipping server on non-used interface"
820
" \"%s\"\n",
821
if_indextoname((unsigned int)if_index,
822
interface));
823
}
824
}
825
return -1;
826
}
827
}
828
829
ret = init_gnutls_session(&session, mc);
662
ret = init_gnutls_session(&session);
830
663
if(ret != 0){
831
664
return -1;
832
665
}
851
684
852
685
memset(&to, 0, sizeof(to));
853
686
if(af == AF_INET6){
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
687
to.in6.sin6_family = (sa_family_t)af;
688
ret = inet_pton(af, ip, &to.in6.sin6_addr);
856
689
} else { /* IPv4 */
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
690
to.in.sin_family = (sa_family_t)af;
691
ret = inet_pton(af, ip, &to.in.sin_addr);
859
692
}
860
693
if(ret < 0 ){
861
694
int e = errno;
870
703
goto mandos_end;
871
704
}
872
705
if(af == AF_INET6){
873
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
874
if(IN6_IS_ADDR_LINKLOCAL
875
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
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*/
876
710
if(if_index == AVAHI_IF_UNSPEC){
877
711
fprintf_plus(stderr, "An IPv6 link-local address is"
878
712
" incomplete without a network interface\n");
880
714
goto mandos_end;
881
715
}
882
716
/* Set the network interface number as scope */
883
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
717
to.in6.sin6_scope_id = (uint32_t)if_index;
884
718
}
885
719
} else {
886
((struct sockaddr_in *)&to)->sin_port = htons(port);
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
887
723
}
888
724
889
725
if(quit_now){
906
742
}
907
743
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
908
744
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
909
746
if(af == AF_INET6){
910
ret = getnameinfo((struct sockaddr *)&to,
911
sizeof(struct sockaddr_in6),
912
addrstr, sizeof(addrstr), NULL, 0,
913
NI_NUMERICHOST);
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
914
749
} else {
915
ret = getnameinfo((struct sockaddr *)&to,
916
sizeof(struct sockaddr_in),
917
addrstr, sizeof(addrstr), NULL, 0,
918
NI_NUMERICHOST);
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
919
752
}
920
if(ret == EAI_SYSTEM){
921
perror_plus("getnameinfo");
922
} else if(ret != 0) {
923
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
924
} else if(strcmp(addrstr, ip) != 0){
925
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
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
}
926
759
}
927
760
}
928
761
932
765
}
933
766
934
767
if(af == AF_INET6){
935
ret = connect(tcp_sd, (struct sockaddr *)&to,
936
sizeof(struct sockaddr_in6));
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
937
769
} else {
938
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
939
sizeof(struct sockaddr_in));
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
940
771
}
941
772
if(ret < 0){
942
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
943
774
int e = errno;
944
775
perror_plus("connect");
945
776
errno = e;
1106
937
if(buffer_length > 0){
1107
938
ssize_t decrypted_buffer_size;
1108
939
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
1109
&decrypted_buffer, mc);
940
&decrypted_buffer);
1110
941
if(decrypted_buffer_size >= 0){
1111
942
1112
943
written = 0;
1160
991
return retval;
1161
992
}
1162
993
1163
__attribute__((nonnull))
1164
994
static void resolve_callback(AvahiSServiceResolver *r,
1165
995
AvahiIfIndex interface,
1166
996
AvahiProtocol proto,
1174
1004
AVAHI_GCC_UNUSED AvahiStringList *txt,
1175
1005
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1176
1006
flags,
1177
void *mc){
1007
AVAHI_GCC_UNUSED void* userdata){
1178
1008
if(r == NULL){
1179
1009
return;
1180
1010
}
1183
1013
timed out */
1184
1014
1185
1015
if(quit_now){
1186
avahi_s_service_resolver_free(r);
1187
1016
return;
1188
1017
}
1189
1018
1193
1022
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1194
1023
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1195
1024
domain,
1196
avahi_strerror(avahi_server_errno
1197
(((mandos_context*)mc)->server)));
1025
avahi_strerror(avahi_server_errno(mc.server)));
1198
1026
break;
1199
1027
1200
1028
case AVAHI_RESOLVER_FOUND:
1208
1036
}
1209
1037
int ret = start_mandos_communication(ip, (in_port_t)port,
1210
1038
interface,
1211
avahi_proto_to_af(proto),
1212
mc);
1039
avahi_proto_to_af(proto));
1213
1040
if(ret == 0){
1214
avahi_simple_poll_quit(simple_poll);
1041
avahi_simple_poll_quit(mc.simple_poll);
1215
1042
} else {
1216
1043
if(not add_server(ip, (in_port_t)port, interface,
1217
avahi_proto_to_af(proto),
1218
&((mandos_context*)mc)->current_server)){
1044
avahi_proto_to_af(proto))){
1219
1045
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1220
1046
" list\n", name);
1221
1047
}
1234
1060
const char *domain,
1235
1061
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1236
1062
flags,
1237
void *mc){
1063
AVAHI_GCC_UNUSED void* userdata){
1238
1064
if(b == NULL){
1239
1065
return;
1240
1066
}
1251
1077
case AVAHI_BROWSER_FAILURE:
1252
1078
1253
1079
fprintf_plus(stderr, "(Avahi browser) %s\n",
1254
avahi_strerror(avahi_server_errno
1255
(((mandos_context*)mc)->server)));
1256
avahi_simple_poll_quit(simple_poll);
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1257
1082
return;
1258
1083
1259
1084
case AVAHI_BROWSER_NEW:
1262
1087
the callback function is called the Avahi server will free the
1263
1088
resolver for us. */
1264
1089
1265
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1266
interface, protocol, name, type,
1267
domain, protocol, 0,
1268
resolve_callback, mc) == NULL)
1090
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
name, type, domain, protocol, 0,
1092
resolve_callback, NULL) == NULL)
1269
1093
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1270
1094
" %s\n", name,
1271
avahi_strerror(avahi_server_errno
1272
(((mandos_context*)mc)->server)));
1095
avahi_strerror(avahi_server_errno(mc.server)));
1273
1096
break;
1274
1097
1275
1098
case AVAHI_BROWSER_REMOVE:
1294
1117
signal_received = sig;
1295
1118
int old_errno = errno;
1296
1119
/* set main loop to exit */
1297
if(simple_poll != NULL){
1298
avahi_simple_poll_quit(simple_poll);
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1299
1122
}
1300
1123
errno = old_errno;
1301
1124
}
1302
1125
1303
__attribute__((nonnull, warn_unused_result))
1304
1126
bool get_flags(const char *ifname, struct ifreq *ifr){
1305
1127
int ret;
1306
1128
error_t ret_errno;
1325
1147
return true;
1326
1148
}
1327
1149
1328
__attribute__((nonnull, warn_unused_result))
1329
1150
bool good_flags(const char *ifname, const struct ifreq *ifr){
1330
1151
1331
1152
/* Reject the loopback device */
1373
1194
* corresponds to an acceptable network device.
1374
1195
* (This function is passed to scandir(3) as a filter function.)
1375
1196
*/
1376
__attribute__((nonnull, warn_unused_result))
1377
1197
int good_interface(const struct dirent *if_entry){
1378
1198
if(if_entry->d_name[0] == '.'){
1379
1199
return 0;
1397
1217
/*
1398
1218
* This function determines if a network interface is up.
1399
1219
*/
1400
__attribute__((nonnull, warn_unused_result))
1401
1220
bool interface_is_up(const char *interface){
1402
1221
struct ifreq ifr;
1403
1222
if(not get_flags(interface, &ifr)){
1414
1233
/*
1415
1234
* This function determines if a network interface is running
1416
1235
*/
1417
__attribute__((nonnull, warn_unused_result))
1418
1236
bool interface_is_running(const char *interface){
1419
1237
struct ifreq ifr;
1420
1238
if(not get_flags(interface, &ifr)){
1428
1246
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1429
1247
}
1430
1248
1431
__attribute__((nonnull, pure, warn_unused_result))
1432
1249
int notdotentries(const struct dirent *direntry){
1433
1250
/* Skip "." and ".." */
1434
1251
if(direntry->d_name[0] == '.'
1441
1258
}
1442
1259
1443
1260
/* Is this directory entry a runnable program? */
1444
__attribute__((nonnull, warn_unused_result))
1445
1261
int runnable_hook(const struct dirent *direntry){
1446
1262
int ret;
1447
1263
size_t sret;
1455
1271
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1456
1272
"abcdefghijklmnopqrstuvwxyz"
1457
1273
"0123456789"
1458
"_.-");
1274
"_-");
1459
1275
if((direntry->d_name)[sret] != '\0'){
1460
1276
/* Contains non-allowed characters */
1461
1277
if(debug){
1465
1281
return 0;
1466
1282
}
1467
1283
1468
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
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);
1469
1292
if(ret == -1){
1470
1293
if(debug){
1471
1294
perror_plus("Could not stat hook");
1495
1318
return 1;
1496
1319
}
1497
1320
1498
__attribute__((nonnull, warn_unused_result))
1499
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1500
mandos_context *mc){
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1501
1322
int ret;
1502
1323
struct timespec now;
1503
1324
struct timespec waited_time;
1504
1325
intmax_t block_time;
1505
1326
1506
1327
while(true){
1507
if(mc->current_server == NULL){
1508
if(debug){
1328
if(mc.current_server == NULL){
1329
if (debug){
1509
1330
fprintf_plus(stderr, "Wait until first server is found."
1510
1331
" No timeout!\n");
1511
1332
}
1512
1333
ret = avahi_simple_poll_iterate(s, -1);
1513
1334
} else {
1514
if(debug){
1335
if (debug){
1515
1336
fprintf_plus(stderr, "Check current_server if we should run"
1516
1337
" it, or wait\n");
1517
1338
}
1524
1345
/* Calculating in ms how long time between now and server
1525
1346
who we visted longest time ago. Now - last seen. */
1526
1347
waited_time.tv_sec = (now.tv_sec
1527
- mc->current_server->last_seen.tv_sec);
1348
- mc.current_server->last_seen.tv_sec);
1528
1349
waited_time.tv_nsec = (now.tv_nsec
1529
- mc->current_server->last_seen.tv_nsec);
1350
- mc.current_server->last_seen.tv_nsec);
1530
1351
/* total time is 10s/10,000ms.
1531
1352
Converting to s from ms by dividing by 1,000,
1532
1353
and ns to ms by dividing by 1,000,000. */
1534
1355
- ((intmax_t)waited_time.tv_sec * 1000))
1535
1356
- ((intmax_t)waited_time.tv_nsec / 1000000));
1536
1357
1537
if(debug){
1358
if (debug){
1538
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1539
1360
block_time);
1540
1361
}
1541
1362
1542
1363
if(block_time <= 0){
1543
ret = start_mandos_communication(mc->current_server->ip,
1544
mc->current_server->port,
1545
mc->current_server->if_index,
1546
mc->current_server->af, mc);
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);
1547
1368
if(ret == 0){
1548
avahi_simple_poll_quit(s);
1369
avahi_simple_poll_quit(mc.simple_poll);
1549
1370
return 0;
1550
1371
}
1551
1372
ret = clock_gettime(CLOCK_MONOTONIC,
1552
&mc->current_server->last_seen);
1373
&mc.current_server->last_seen);
1553
1374
if(ret == -1){
1554
1375
perror_plus("clock_gettime");
1555
1376
return -1;
1556
1377
}
1557
mc->current_server = mc->current_server->next;
1378
mc.current_server = mc.current_server->next;
1558
1379
block_time = 0; /* Call avahi to find new Mandos
1559
1380
servers, but don't block */
1560
1381
}
1562
1383
ret = avahi_simple_poll_iterate(s, (int)block_time);
1563
1384
}
1564
1385
if(ret != 0){
1565
if(ret > 0 or errno != EINTR){
1386
if (ret > 0 or errno != EINTR){
1566
1387
return (ret != 1) ? ret : 0;
1567
1388
}
1568
1389
}
1570
1391
}
1571
1392
1572
1393
/* Set effective uid to 0, return errno */
1573
__attribute__((warn_unused_result))
1574
1394
error_t raise_privileges(void){
1575
1395
error_t old_errno = errno;
1576
1396
error_t ret_errno = 0;
1577
1397
if(seteuid(0) == -1){
1578
1398
ret_errno = errno;
1399
perror_plus("seteuid");
1579
1400
}
1580
1401
errno = old_errno;
1581
1402
return ret_errno;
1582
1403
}
1583
1404
1584
1405
/* Set effective and real user ID to 0. Return errno. */
1585
__attribute__((warn_unused_result))
1586
1406
error_t raise_privileges_permanently(void){
1587
1407
error_t old_errno = errno;
1588
1408
error_t ret_errno = raise_privileges();
1592
1412
}
1593
1413
if(setuid(0) == -1){
1594
1414
ret_errno = errno;
1415
perror_plus("seteuid");
1595
1416
}
1596
1417
errno = old_errno;
1597
1418
return ret_errno;
1598
1419
}
1599
1420
1600
1421
/* Set effective user ID to unprivileged saved user ID */
1601
__attribute__((warn_unused_result))
1602
1422
error_t lower_privileges(void){
1603
1423
error_t old_errno = errno;
1604
1424
error_t ret_errno = 0;
1605
1425
if(seteuid(uid) == -1){
1606
1426
ret_errno = errno;
1427
perror_plus("seteuid");
1607
1428
}
1608
1429
errno = old_errno;
1609
1430
return ret_errno;
1610
1431
}
1611
1432
1612
1433
/* Lower privileges permanently */
1613
__attribute__((warn_unused_result))
1614
1434
error_t lower_privileges_permanently(void){
1615
1435
error_t old_errno = errno;
1616
1436
error_t ret_errno = 0;
1617
1437
if(setuid(uid) == -1){
1618
1438
ret_errno = errno;
1439
perror_plus("setuid");
1619
1440
}
1620
1441
errno = old_errno;
1621
1442
return ret_errno;
1622
1443
}
1623
1444
1624
__attribute__((nonnull))
1625
void run_network_hooks(const char *mode, const char *interface,
1445
bool run_network_hooks(const char *mode, const char *interface,
1626
1446
const float delay){
1627
struct dirent **direntries = NULL;
1628
if(hookdir_fd == -1){
1629
hookdir_fd = open(hookdir, O_RDONLY);
1630
if(hookdir_fd == -1){
1631
if(errno == ENOENT){
1632
if(debug){
1633
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1634
" found\n", hookdir);
1635
}
1636
} else {
1637
perror_plus("open");
1638
}
1639
return;
1640
}
1641
}
1642
#ifdef __GLIBC__
1643
#if __GLIBC_PREREQ(2, 15)
1644
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1645
runnable_hook, alphasort);
1646
#else /* not __GLIBC_PREREQ(2, 15) */
1647
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1648
alphasort);
1649
#endif /* not __GLIBC_PREREQ(2, 15) */
1650
#else /* not __GLIBC__ */
1651
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1652
alphasort);
1653
#endif /* not __GLIBC__ */
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1449
int ret;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
alphasort);
1654
1452
if(numhooks == -1){
1655
perror_plus("scandir");
1656
return;
1657
}
1658
struct dirent *direntry;
1659
int ret;
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[i];
1663
if(debug){
1664
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1665
direntry->d_name);
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");
1666
1460
}
1667
pid_t hook_pid = fork();
1668
if(hook_pid == 0){
1669
/* Child */
1670
/* Raise privileges */
1671
errno = raise_privileges_permanently();
1672
if(errno != 0){
1673
perror_plus("Failed to raise privileges");
1674
_exit(EX_NOPERM);
1675
}
1676
/* Set group */
1677
errno = 0;
1678
ret = setgid(0);
1679
if(ret == -1){
1680
perror_plus("setgid");
1681
_exit(EX_NOPERM);
1682
}
1683
/* Reset supplementary groups */
1684
errno = 0;
1685
ret = setgroups(0, NULL);
1686
if(ret == -1){
1687
perror_plus("setgroups");
1688
_exit(EX_NOPERM);
1689
}
1690
ret = dup2(devnull, STDIN_FILENO);
1691
if(ret == -1){
1692
perror_plus("dup2(devnull, STDIN_FILENO)");
1693
_exit(EX_OSERR);
1694
}
1695
ret = close(devnull);
1696
if(ret == -1){
1697
perror_plus("close");
1698
_exit(EX_OSERR);
1699
}
1700
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1701
if(ret == -1){
1702
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1703
_exit(EX_OSERR);
1704
}
1705
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1706
if(ret == -1){
1707
perror_plus("setenv");
1708
_exit(EX_OSERR);
1709
}
1710
ret = setenv("DEVICE", interface, 1);
1711
if(ret == -1){
1712
perror_plus("setenv");
1713
_exit(EX_OSERR);
1714
}
1715
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1716
if(ret == -1){
1717
perror_plus("setenv");
1718
_exit(EX_OSERR);
1719
}
1720
ret = setenv("MODE", mode, 1);
1721
if(ret == -1){
1722
perror_plus("setenv");
1723
_exit(EX_OSERR);
1724
}
1725
char *delaystring;
1726
ret = asprintf(&delaystring, "%f", (double)delay);
1727
if(ret == -1){
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){
1728
1468
perror_plus("asprintf");
1729
_exit(EX_OSERR);
1730
}
1731
ret = setenv("DELAY", delaystring, 1);
1732
if(ret == -1){
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
}
1733
1527
free(delaystring);
1734
perror_plus("setenv");
1735
_exit(EX_OSERR);
1736
}
1737
free(delaystring);
1738
if(connect_to != NULL){
1739
ret = setenv("CONNECT", connect_to, 1);
1740
if(ret == -1){
1741
perror_plus("setenv");
1742
_exit(EX_OSERR);
1743
}
1744
}
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1746
if(hook_fd == -1){
1747
perror_plus("openat");
1748
_exit(EXIT_FAILURE);
1749
}
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1751
perror_plus("close");
1752
_exit(EXIT_FAILURE);
1753
}
1754
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1755
environ) == -1){
1756
perror_plus("fexecve");
1757
_exit(EXIT_FAILURE);
1758
}
1759
} else {
1760
if(hook_pid == -1){
1761
perror_plus("fork");
1762
free(direntry);
1763
continue;
1764
}
1765
int status;
1766
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1767
perror_plus("waitpid");
1768
free(direntry);
1769
continue;
1770
}
1771
if(WIFEXITED(status)){
1772
if(WEXITSTATUS(status) != 0){
1773
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1774
" with status %d\n", direntry->d_name,
1775
WEXITSTATUS(status));
1776
free(direntry);
1777
continue;
1778
}
1779
} else if(WIFSIGNALED(status)){
1780
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1781
" signal %d\n", direntry->d_name,
1782
WTERMSIG(status));
1783
free(direntry);
1784
continue;
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
}
1785
1539
} else {
1786
fprintf_plus(stderr, "Warning: network hook \"%s\""
1787
" crashed\n", direntry->d_name);
1788
free(direntry);
1789
continue;
1790
}
1791
}
1792
if(debug){
1793
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1794
direntry->d_name);
1795
}
1796
free(direntry);
1797
}
1798
free(direntries);
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1800
perror_plus("close");
1801
} else {
1802
hookdir_fd = -1;
1803
}
1804
close(devnull);
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;
1805
1576
}
1806
1577
1807
__attribute__((nonnull, warn_unused_result))
1808
1578
error_t bring_up_interface(const char *const interface,
1809
1579
const float delay){
1580
int sd = -1;
1810
1581
error_t old_errno = errno;
1811
int ret;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1812
1584
struct ifreq network;
1813
1585
unsigned int if_index = if_nametoindex(interface);
1814
1586
if(if_index == 0){
1823
1595
}
1824
1596
1825
1597
if(not interface_is_up(interface)){
1826
error_t ret_errno = 0, ioctl_errno = 0;
1827
if(not get_flags(interface, &network)){
1598
if(not get_flags(interface, &network) and debug){
1828
1599
ret_errno = errno;
1829
1600
fprintf_plus(stderr, "Failed to get flags for interface "
1830
1601
"\"%s\"\n", interface);
1831
errno = old_errno;
1832
1602
return ret_errno;
1833
1603
}
1834
network.ifr_flags |= IFF_UP; /* set flag */
1604
network.ifr_flags |= IFF_UP;
1835
1605
1836
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1837
if(sd == -1){
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1838
1608
ret_errno = errno;
1839
1609
perror_plus("socket");
1840
1610
errno = old_errno;
1841
1611
return ret_errno;
1842
1612
}
1843
1613
1844
1614
if(quit_now){
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1846
if(ret == -1){
1847
perror_plus("close");
1848
}
1615
close(sd);
1849
1616
errno = old_errno;
1850
1617
return EINTR;
1851
1618
}
1855
1622
interface);
1856
1623
}
1857
1624
1858
/* Raise privileges */
1859
ret_errno = raise_privileges();
1860
if(ret_errno != 0){
1861
errno = ret_errno;
1862
perror_plus("Failed to raise privileges");
1863
}
1625
/* Raise priviliges */
1626
raise_privileges();
1864
1627
1865
1628
#ifdef __linux__
1866
int ret_linux;
1867
bool restore_loglevel = false;
1868
if(ret_errno == 0){
1869
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1870
messages about the network interface to mess up the prompt */
1871
ret_linux = klogctl(8, NULL, 5);
1872
if(ret_linux == -1){
1873
perror_plus("klogctl");
1874
} else {
1875
restore_loglevel = true;
1876
}
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");
1877
1636
}
1878
1637
#endif /* __linux__ */
1879
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1880
ioctl_errno = errno;
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1881
1640
#ifdef __linux__
1882
1641
if(restore_loglevel){
1883
1642
ret_linux = klogctl(7, NULL, 0);
1887
1646
}
1888
1647
#endif /* __linux__ */
1889
1648
1890
/* If raise_privileges() succeeded above */
1891
if(ret_errno == 0){
1892
/* Lower privileges */
1893
ret_errno = lower_privileges();
1894
if(ret_errno != 0){
1895
errno = ret_errno;
1896
perror_plus("Failed to lower privileges");
1897
}
1898
}
1649
/* Lower privileges */
1650
lower_privileges();
1899
1651
1900
1652
/* Close the socket */
1901
1653
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1904
1656
}
1905
1657
1906
1658
if(ret_setflags == -1){
1907
errno = ioctl_errno;
1659
errno = ret_errno;
1908
1660
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1909
1661
errno = old_errno;
1910
return ioctl_errno;
1662
return ret_errno;
1911
1663
}
1912
1664
} else if(debug){
1913
1665
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1931
1683
return 0;
1932
1684
}
1933
1685
1934
__attribute__((nonnull, warn_unused_result))
1935
1686
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1936
1688
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1937
1691
struct ifreq network;
1938
1692
unsigned int if_index = if_nametoindex(interface);
1939
1693
if(if_index == 0){
1942
1696
return ENXIO;
1943
1697
}
1944
1698
if(interface_is_up(interface)){
1945
error_t ret_errno = 0, ioctl_errno = 0;
1946
1699
if(not get_flags(interface, &network) and debug){
1947
1700
ret_errno = errno;
1948
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1949
1702
"\"%s\"\n", interface);
1950
errno = old_errno;
1951
1703
return ret_errno;
1952
1704
}
1953
1705
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1954
1706
1955
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1956
if(sd == -1){
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1957
1709
ret_errno = errno;
1958
1710
perror_plus("socket");
1959
1711
errno = old_errno;
1965
1717
interface);
1966
1718
}
1967
1719
1968
/* Raise privileges */
1969
ret_errno = raise_privileges();
1970
if(ret_errno != 0){
1971
errno = ret_errno;
1972
perror_plus("Failed to raise privileges");
1973
}
1974
1975
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1976
ioctl_errno = errno;
1977
1978
/* If raise_privileges() succeeded above */
1979
if(ret_errno == 0){
1980
/* Lower privileges */
1981
ret_errno = lower_privileges();
1982
if(ret_errno != 0){
1983
errno = ret_errno;
1984
perror_plus("Failed to lower privileges");
1985
}
1986
}
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();
1987
1728
1988
1729
/* Close the socket */
1989
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1990
1731
if(ret == -1){
1991
1732
perror_plus("close");
1992
1733
}
1993
1734
1994
1735
if(ret_setflags == -1){
1995
errno = ioctl_errno;
1736
errno = ret_errno;
1996
1737
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1997
1738
errno = old_errno;
1998
return ioctl_errno;
1739
return ret_errno;
1999
1740
}
2000
1741
} else if(debug){
2001
1742
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2007
1748
}
2008
1749
2009
1750
int main(int argc, char *argv[]){
2010
mandos_context mc = { .server = NULL, .dh_bits = 0,
2011
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
2013
.interfaces = NULL, .interfaces_size = 0 };
2014
1751
AvahiSServiceBrowser *sb = NULL;
2015
1752
error_t ret_errno;
2016
1753
int ret;
2017
1754
intmax_t tmpmax;
2018
1755
char *tmp;
2019
1756
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
2020
1759
char *interfaces_to_take_down = NULL;
2021
1760
size_t interfaces_to_take_down_size = 0;
2022
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2023
char old_tempdir[] = "/tmp/mandosXXXXXX";
2024
char *tempdir = NULL;
1761
char tempdir[] = "/tmp/mandosXXXXXX";
1762
bool tempdir_created = false;
2025
1763
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2026
1764
const char *seckey = PATHDIR "/" SECKEY;
2027
1765
const char *pubkey = PATHDIR "/" PUBKEY;
2028
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
2029
1768
2030
1769
bool gnutls_initialized = false;
2031
1770
bool gpgme_initialized = false;
2122
1861
connect_to = arg;
2123
1862
break;
2124
1863
case 'i': /* --interface */
2125
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2126
arg, (int)',');
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
2127
1866
if(ret_errno != 0){
2128
1867
argp_error(state, "%s", strerror(ret_errno));
2129
1868
}
2209
1948
/* Work around Debian bug #633582:
2210
1949
<http://bugs.debian.org/633582> */
2211
1950
2212
/* Re-raise privileges */
2213
ret_errno = raise_privileges();
2214
if(ret_errno != 0){
2215
errno = ret_errno;
2216
perror_plus("Failed to raise privileges");
2217
} else {
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
2218
1953
struct stat st;
2219
1954
2220
1955
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2260
1995
}
2261
1996
2262
1997
/* Lower privileges */
2263
ret_errno = lower_privileges();
2264
if(ret_errno != 0){
2265
errno = ret_errno;
2266
perror_plus("Failed to lower privileges");
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2267
2002
}
2268
2003
}
2269
2004
}
2270
2005
2271
/* Remove invalid interface names (except "none") */
2006
/* Remove empty interface names */
2272
2007
{
2273
2008
char *interface = NULL;
2274
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2009
while((interface = argz_next(interfaces, interfaces_size,
2275
2010
interface))){
2276
if(strcmp(interface, "none") != 0
2277
and if_nametoindex(interface) == 0){
2278
if(interface[0] != '\0'){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2279
2013
fprintf_plus(stderr, "Not using nonexisting interface"
2280
2014
" \"%s\"\n", interface);
2281
2015
}
2282
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2016
argz_delete(&interfaces, &interfaces_size, interface);
2283
2017
interface = NULL;
2284
2018
}
2285
2019
}
2287
2021
2288
2022
/* Run network hooks */
2289
2023
{
2290
if(mc.interfaces != NULL){
2291
interfaces_hooks = malloc(mc.interfaces_size);
2292
if(interfaces_hooks == NULL){
2293
perror_plus("malloc");
2294
goto end;
2295
}
2296
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2297
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2298
}
2299
run_network_hooks("start", interfaces_hooks != NULL ?
2300
interfaces_hooks : "", delay);
2024
ret_errno = argz_append(&interfaces_hooks, &interfaces_hooks_size,
2025
interfaces, interfaces_size);
2026
if(ret_errno != 0){
2027
errno = ret_errno;
2028
perror_plus("argz_append");
2029
goto end;
2030
}
2031
argz_stringify(interfaces_hooks, interfaces_hooks_size, (int)',');
2032
if(not run_network_hooks("start", interfaces_hooks, delay)){
2033
goto end;
2034
}
2301
2035
}
2302
2036
2303
2037
if(not debug){
2308
2042
from the signal handler */
2309
2043
/* Initialize the pseudo-RNG for Avahi */
2310
2044
srand((unsigned int) time(NULL));
2311
simple_poll = avahi_simple_poll_new();
2312
if(simple_poll == NULL){
2045
mc.simple_poll = avahi_simple_poll_new();
2046
if(mc.simple_poll == NULL){
2313
2047
fprintf_plus(stderr,
2314
2048
"Avahi: Failed to create simple poll object.\n");
2315
2049
exitcode = EX_UNAVAILABLE;
2380
2114
}
2381
2115
2382
2116
/* If no interfaces were specified, make a list */
2383
if(mc.interfaces == NULL){
2384
struct dirent **direntries = NULL;
2117
if(interfaces == NULL){
2118
struct dirent **direntries;
2385
2119
/* Look for any good interfaces */
2386
2120
ret = scandir(sys_class_net, &direntries, good_interface,
2387
2121
alphasort);
2388
2122
if(ret >= 1){
2389
2123
/* Add all found interfaces to interfaces list */
2390
2124
for(int i = 0; i < ret; ++i){
2391
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2125
ret_errno = argz_add(&interfaces, &interfaces_size,
2392
2126
direntries[i]->d_name);
2393
2127
if(ret_errno != 0){
2394
errno = ret_errno;
2395
2128
perror_plus("argz_add");
2396
free(direntries[i]);
2397
2129
continue;
2398
2130
}
2399
2131
if(debug){
2400
2132
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2401
2133
direntries[i]->d_name);
2402
2134
}
2403
free(direntries[i]);
2404
2135
}
2405
2136
free(direntries);
2406
2137
} else {
2407
if(ret == 0){
2408
free(direntries);
2409
}
2138
free(direntries);
2410
2139
fprintf_plus(stderr, "Could not find a network interface\n");
2411
2140
exitcode = EXIT_FAILURE;
2412
2141
goto end;
2413
2142
}
2414
2143
}
2415
2144
2416
/* Bring up interfaces which are down, and remove any "none"s */
2417
{
2145
/* If we only got one interface, explicitly use only that one */
2146
if(argz_count(interfaces, interfaces_size) == 1){
2147
if(debug){
2148
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2149
interfaces);
2150
}
2151
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2152
}
2153
2154
/* Bring up interfaces which are down */
2155
if(not (argz_count(interfaces, interfaces_size) == 1
2156
and strcmp(interfaces, "none") == 0)){
2418
2157
char *interface = NULL;
2419
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2158
while((interface = argz_next(interfaces, interfaces_size,
2420
2159
interface))){
2421
/* If interface name is "none", stop bringing up interfaces.
2422
Also remove all instances of "none" from the list */
2423
if(strcmp(interface, "none") == 0){
2424
argz_delete(&mc.interfaces, &mc.interfaces_size,
2425
interface);
2426
interface = NULL;
2427
while((interface = argz_next(mc.interfaces,
2428
mc.interfaces_size, interface))){
2429
if(strcmp(interface, "none") == 0){
2430
argz_delete(&mc.interfaces, &mc.interfaces_size,
2431
interface);
2432
interface = NULL;
2433
}
2434
}
2435
break;
2436
}
2437
2160
bool interface_was_up = interface_is_up(interface);
2438
errno = bring_up_interface(interface, delay);
2161
ret = bring_up_interface(interface, delay);
2439
2162
if(not interface_was_up){
2440
if(errno != 0){
2163
if(ret != 0){
2164
errno = ret;
2441
2165
perror_plus("Failed to bring up interface");
2442
2166
} else {
2443
errno = argz_add(&interfaces_to_take_down,
2444
&interfaces_to_take_down_size,
2445
interface);
2446
if(errno != 0){
2447
perror_plus("argz_add");
2448
}
2167
ret_errno = argz_add(&interfaces_to_take_down,
2168
&interfaces_to_take_down_size,
2169
interface);
2449
2170
}
2450
2171
}
2451
2172
}
2173
free(interfaces);
2174
interfaces = NULL;
2175
interfaces_size = 0;
2452
2176
if(debug and (interfaces_to_take_down == NULL)){
2453
2177
fprintf_plus(stderr, "No interfaces were brought up\n");
2454
2178
}
2455
2179
}
2456
2180
2457
/* If we only got one interface, explicitly use only that one */
2458
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2459
if(debug){
2460
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2461
mc.interfaces);
2462
}
2463
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2464
}
2465
2466
2181
if(quit_now){
2467
2182
goto end;
2468
2183
}
2469
2184
2470
ret = init_gnutls_global(pubkey, seckey, &mc);
2185
ret = init_gnutls_global(pubkey, seckey);
2471
2186
if(ret == -1){
2472
2187
fprintf_plus(stderr, "init_gnutls_global failed\n");
2473
2188
exitcode = EX_UNAVAILABLE;
2480
2195
goto end;
2481
2196
}
2482
2197
2483
/* Try /run/tmp before /tmp */
2484
tempdir = mkdtemp(run_tempdir);
2485
if(tempdir == NULL and errno == ENOENT){
2486
if(debug){
2487
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2488
run_tempdir, old_tempdir);
2489
}
2490
tempdir = mkdtemp(old_tempdir);
2491
}
2492
if(tempdir == NULL){
2198
if(mkdtemp(tempdir) == NULL){
2493
2199
perror_plus("mkdtemp");
2494
2200
goto end;
2495
2201
}
2202
tempdir_created = true;
2496
2203
2497
2204
if(quit_now){
2498
2205
goto end;
2499
2206
}
2500
2207
2501
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2208
if(not init_gpgme(pubkey, seckey, tempdir)){
2502
2209
fprintf_plus(stderr, "init_gpgme failed\n");
2503
2210
exitcode = EX_UNAVAILABLE;
2504
2211
goto end;
2534
2241
exitcode = EX_USAGE;
2535
2242
goto end;
2536
2243
}
2537
2244
2538
2245
if(quit_now){
2539
2246
goto end;
2540
2247
}
2561
2268
}
2562
2269
2563
2270
while(not quit_now){
2564
ret = start_mandos_communication(address, port, if_index, af,
2565
&mc);
2271
ret = start_mandos_communication(address, port, if_index, af);
2566
2272
if(quit_now or ret == 0){
2567
2273
break;
2568
2274
}
2570
2276
fprintf_plus(stderr, "Retrying in %d seconds\n",
2571
2277
(int)retry_interval);
2572
2278
}
2573
sleep((unsigned int)retry_interval);
2279
sleep((int)retry_interval);
2574
2280
}
2575
2281
2576
if(not quit_now){
2282
if (not quit_now){
2577
2283
exitcode = EXIT_SUCCESS;
2578
2284
}
2579
2285
2594
2300
config.publish_domain = 0;
2595
2301
2596
2302
/* Allocate a new server */
2597
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2598
&config, NULL, NULL, &ret_errno);
2303
mc.server = avahi_server_new(avahi_simple_poll_get
2304
(mc.simple_poll), &config, NULL,
2305
NULL, &ret_errno);
2599
2306
2600
2307
/* Free the Avahi configuration data */
2601
2308
avahi_server_config_free(&config);
2616
2323
/* Create the Avahi service browser */
2617
2324
sb = avahi_s_service_browser_new(mc.server, if_index,
2618
2325
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2619
NULL, 0, browse_callback,
2620
(void *)&mc);
2326
NULL, 0, browse_callback, NULL);
2621
2327
if(sb == NULL){
2622
2328
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2623
2329
avahi_strerror(avahi_server_errno(mc.server)));
2634
2340
if(debug){
2635
2341
fprintf_plus(stderr, "Starting Avahi loop search\n");
2636
2342
}
2637
2638
ret = avahi_loop_with_timeout(simple_poll,
2639
(int)(retry_interval * 1000), &mc);
2343
2344
ret = avahi_loop_with_timeout(mc.simple_poll,
2345
(int)(retry_interval * 1000));
2640
2346
if(debug){
2641
2347
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2642
2348
(ret == 0) ? "successfully" : "with error");
2649
2355
}
2650
2356
2651
2357
/* Cleanup things */
2652
free(mc.interfaces);
2653
2654
2358
if(sb != NULL)
2655
2359
avahi_s_service_browser_free(sb);
2656
2360
2657
2361
if(mc.server != NULL)
2658
2362
avahi_server_free(mc.server);
2659
2363
2660
if(simple_poll != NULL)
2661
avahi_simple_poll_free(simple_poll);
2364
if(mc.simple_poll != NULL)
2365
avahi_simple_poll_free(mc.simple_poll);
2662
2366
2663
2367
if(gnutls_initialized){
2664
2368
gnutls_certificate_free_credentials(mc.cred);
2676
2380
mc.current_server->prev->next = NULL;
2677
2381
while(mc.current_server != NULL){
2678
2382
server *next = mc.current_server->next;
2679
#ifdef __GNUC__
2680
#pragma GCC diagnostic push
2681
#pragma GCC diagnostic ignored "-Wcast-qual"
2682
#endif
2683
free((char *)(mc.current_server->ip));
2684
#ifdef __GNUC__
2685
#pragma GCC diagnostic pop
2686
#endif
2687
2383
free(mc.current_server);
2688
2384
mc.current_server = next;
2689
2385
}
2690
2386
}
2691
2387
2692
/* Re-raise privileges */
2388
/* Re-raise priviliges */
2693
2389
{
2694
ret_errno = raise_privileges();
2695
if(ret_errno != 0){
2696
errno = ret_errno;
2697
perror_plus("Failed to raise privileges");
2698
} else {
2699
2700
/* Run network hooks */
2701
run_network_hooks("stop", interfaces_hooks != NULL ?
2702
interfaces_hooks : "", delay);
2703
2704
/* Take down the network interfaces which were brought up */
2705
{
2706
char *interface = NULL;
2707
while((interface=argz_next(interfaces_to_take_down,
2708
interfaces_to_take_down_size,
2709
interface))){
2710
ret_errno = take_down_interface(interface);
2711
if(ret_errno != 0){
2712
errno = ret_errno;
2713
perror_plus("Failed to take down interface");
2714
}
2715
}
2716
if(debug and (interfaces_to_take_down == NULL)){
2717
fprintf_plus(stderr, "No interfaces needed to be taken"
2718
" down\n");
2719
}
2720
}
2721
}
2722
2723
ret_errno = lower_privileges_permanently();
2724
if(ret_errno != 0){
2725
errno = ret_errno;
2726
perror_plus("Failed to lower privileges permanently");
2727
}
2390
raise_privileges();
2391
2392
/* Run network hooks */
2393
run_network_hooks("stop", interfaces_hooks, delay);
2394
2395
/* Take down the network interfaces which were brought up */
2396
{
2397
char *interface = NULL;
2398
while((interface=argz_next(interfaces_to_take_down,
2399
interfaces_to_take_down_size,
2400
interface))){
2401
ret_errno = take_down_interface(interface);
2402
if(ret_errno != 0){
2403
errno = ret_errno;
2404
perror_plus("Failed to take down interface");
2405
}
2406
}
2407
if(debug and (interfaces_to_take_down == NULL)){
2408
fprintf_plus(stderr, "No interfaces needed to be taken"
2409
" down\n");
2410
}
2411
}
2412
2413
lower_privileges_permanently();
2728
2414
}
2729
2415
2730
2416
free(interfaces_to_take_down);
2731
2417
free(interfaces_hooks);
2732
2418
2733
2419
/* Removes the GPGME temp directory and all files inside */
2734
if(tempdir != NULL){
2420
if(tempdir_created){
2735
2421
struct dirent **direntries = NULL;
2736
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2737
O_NOFOLLOW));
2738
if(tempdir_fd == -1){
2739
perror_plus("open");
2740
} else {
2741
#ifdef __GLIBC__
2742
#if __GLIBC_PREREQ(2, 15)
2743
int numentries = scandirat(tempdir_fd, ".", &direntries,
2744
notdotentries, alphasort);
2745
#else /* not __GLIBC_PREREQ(2, 15) */
2746
int numentries = scandir(tempdir, &direntries, notdotentries,
2747
alphasort);
2748
#endif /* not __GLIBC_PREREQ(2, 15) */
2749
#else /* not __GLIBC__ */
2750
int numentries = scandir(tempdir, &direntries, notdotentries,
2751
alphasort);
2752
#endif /* not __GLIBC__ */
2753
if(numentries >= 0){
2754
for(int i = 0; i < numentries; i++){
2755
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2756
if(ret == -1){
2757
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2758
" \"%s\", 0): %s\n", tempdir,
2759
direntries[i]->d_name, strerror(errno));
2760
}
2761
free(direntries[i]);
2762
}
2763
2764
/* need to clean even if 0 because man page doesn't specify */
2765
free(direntries);
2766
if(numentries == -1){
2767
perror_plus("scandir");
2768
}
2769
ret = rmdir(tempdir);
2770
if(ret == -1 and errno != ENOENT){
2771
perror_plus("rmdir");
2772
}
2422
struct dirent *direntry = NULL;
2423
int numentries = scandir(tempdir, &direntries, notdotentries,
2424
alphasort);
2425
if (numentries > 0){
2426
for(int i = 0; i < numentries; i++){
2427
direntry = direntries[i];
2428
char *fullname = NULL;
2429
ret = asprintf(&fullname, "%s/%s", tempdir,
2430
direntry->d_name);
2431
if(ret < 0){
2432
perror_plus("asprintf");
2433
continue;
2434
}
2435
ret = remove(fullname);
2436
if(ret == -1){
2437
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2438
strerror(errno));
2439
}
2440
free(fullname);
2773
2441
}
2774
TEMP_FAILURE_RETRY(close(tempdir_fd));
2442
}
2443
2444
/* need to clean even if 0 because man page doesn't specify */
2445
free(direntries);
2446
if (numentries == -1){
2447
perror_plus("scandir");
2448
}
2449
ret = rmdir(tempdir);
2450
if(ret == -1 and errno != ENOENT){
2451
perror_plus("rmdir");
2775
2452
}
2776
2453
}
2777
2454
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0