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- Committer: Teddy Hogeborn
- Date: 2009-09-05 01:46:42 UTC
- Revision ID: teddy@fukt.bsnet.se-20090905014642-36108sqop1ci0z0m
* plugins.d/mandos-client.c (start_mandos_communication): Check
"quit_now"
throughout.
Always close
socket and
deinit GnuTLS
properly.
(browse_callback): Return immediately if "quit_now" is set.
"quit_now"
throughout.
Always close
socket and
deinit GnuTLS
properly.
(browse_callback): Return immediately if "quit_now" is set.
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
33
34
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
38
#endif
35
39
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
37
41
38
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
40
remove() */
43
stdout, ferror(), remove() */
41
44
#include <stdint.h> /* uint16_t, uint32_t */
42
45
#include <stddef.h> /* NULL, size_t, ssize_t */
43
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
44
srand() */
47
srand(), strtof() */
45
48
#include <stdbool.h> /* bool, false, true */
46
49
#include <string.h> /* memset(), strcmp(), strlen(),
47
50
strerror(), asprintf(), strcpy() */
56
59
#include <fcntl.h> /* open() */
57
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
58
61
*/
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
60
64
#include <assert.h> /* assert() */
61
65
#include <errno.h> /* perror(), errno */
62
66
#include <time.h> /* nanosleep(), time() */
75
79
argp_state, struct argp,
76
80
argp_parse(), ARGP_KEY_ARG,
77
81
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
78
86
#ifdef __linux__
79
87
#include <sys/klog.h> /* klogctl() */
80
#endif
88
#endif /* __linux__ */
81
89
82
90
/* Avahi */
83
91
/* All Avahi types, constants and functions
129
137
gpgme_ctx_t ctx;
130
138
} mandos_context;
131
139
140
/* global context so signal handler can reach it*/
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
132
145
/*
133
* Make additional room in "buffer" for at least BUFFER_SIZE
134
* additional bytes. "buffer_capacity" is how much is currently
135
* allocated, "buffer_length" is how much is already used.
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
148
* "buffer_length" is how much is already used.
136
149
*/
137
150
size_t incbuffer(char **buffer, size_t buffer_length,
138
151
size_t buffer_capacity){
149
162
/*
150
163
* Initialize GPGME.
151
164
*/
152
static bool init_gpgme(mandos_context *mc, const char *seckey,
165
static bool init_gpgme(const char *seckey,
153
166
const char *pubkey, const char *tempdir){
154
167
int ret;
155
168
gpgme_error_t rc;
176
189
return false;
177
190
}
178
191
179
rc = gpgme_op_import(mc->ctx, pgp_data);
192
rc = gpgme_op_import(mc.ctx, pgp_data);
180
193
if(rc != GPG_ERR_NO_ERROR){
181
194
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
182
195
gpgme_strsource(rc), gpgme_strerror(rc));
192
205
}
193
206
194
207
if(debug){
195
fprintf(stderr, "Initialize gpgme\n");
208
fprintf(stderr, "Initializing GPGME\n");
196
209
}
197
210
198
211
/* Init GPGME */
225
238
}
226
239
227
240
/* Create new GPGME "context" */
228
rc = gpgme_new(&(mc->ctx));
241
rc = gpgme_new(&(mc.ctx));
229
242
if(rc != GPG_ERR_NO_ERROR){
230
243
fprintf(stderr, "bad gpgme_new: %s: %s\n",
231
244
gpgme_strsource(rc), gpgme_strerror(rc));
236
249
return false;
237
250
}
238
251
239
return true;
252
return true;
240
253
}
241
254
242
255
/*
243
256
* Decrypt OpenPGP data.
244
257
* Returns -1 on error
245
258
*/
246
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
247
const char *cryptotext,
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
248
260
size_t crypto_size,
249
261
char **plaintext){
250
262
gpgme_data_t dh_crypto, dh_plain;
277
289
278
290
/* Decrypt data from the cryptotext data buffer to the plaintext
279
291
data buffer */
280
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
281
293
if(rc != GPG_ERR_NO_ERROR){
282
294
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
283
295
gpgme_strsource(rc), gpgme_strerror(rc));
284
296
plaintext_length = -1;
285
297
if(debug){
286
298
gpgme_decrypt_result_t result;
287
result = gpgme_op_decrypt_result(mc->ctx);
299
result = gpgme_op_decrypt_result(mc.ctx);
288
300
if(result == NULL){
289
301
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
290
302
} else {
297
309
}
298
310
gpgme_recipient_t recipient;
299
311
recipient = result->recipients;
300
if(recipient){
301
while(recipient != NULL){
302
fprintf(stderr, "Public key algorithm: %s\n",
303
gpgme_pubkey_algo_name(recipient->pubkey_algo));
304
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
305
fprintf(stderr, "Secret key available: %s\n",
306
recipient->status == GPG_ERR_NO_SECKEY
307
? "No" : "Yes");
308
recipient = recipient->next;
309
}
312
while(recipient != NULL){
313
fprintf(stderr, "Public key algorithm: %s\n",
314
gpgme_pubkey_algo_name(recipient->pubkey_algo));
315
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
316
fprintf(stderr, "Secret key available: %s\n",
317
recipient->status == GPG_ERR_NO_SECKEY
318
? "No" : "Yes");
319
recipient = recipient->next;
310
320
}
311
321
}
312
322
}
382
392
fprintf(stderr, "GnuTLS: %s", string);
383
393
}
384
394
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
395
static int init_gnutls_global(const char *pubkeyfilename,
387
396
const char *seckeyfilename){
388
397
int ret;
389
398
407
416
}
408
417
409
418
/* OpenPGP credentials */
410
gnutls_certificate_allocate_credentials(&mc->cred);
419
gnutls_certificate_allocate_credentials(&mc.cred);
411
420
if(ret != GNUTLS_E_SUCCESS){
412
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
422
from
425
434
}
426
435
427
436
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
437
(mc.cred, pubkeyfilename, seckeyfilename,
429
438
GNUTLS_OPENPGP_FMT_BASE64);
430
439
if(ret != GNUTLS_E_SUCCESS){
431
440
fprintf(stderr,
437
446
}
438
447
439
448
/* GnuTLS server initialization */
440
ret = gnutls_dh_params_init(&mc->dh_params);
449
ret = gnutls_dh_params_init(&mc.dh_params);
441
450
if(ret != GNUTLS_E_SUCCESS){
442
451
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
452
" %s\n", safer_gnutls_strerror(ret));
444
453
goto globalfail;
445
454
}
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
447
456
if(ret != GNUTLS_E_SUCCESS){
448
457
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
458
safer_gnutls_strerror(ret));
450
459
goto globalfail;
451
460
}
452
461
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
454
463
455
464
return 0;
456
465
457
466
globalfail:
458
467
459
gnutls_certificate_free_credentials(mc->cred);
468
gnutls_certificate_free_credentials(mc.cred);
460
469
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
470
gnutls_dh_params_deinit(mc.dh_params);
462
471
return -1;
463
472
}
464
473
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
474
static int init_gnutls_session(gnutls_session_t *session){
467
475
int ret;
468
476
/* GnuTLS session creation */
469
477
ret = gnutls_init(session, GNUTLS_SERVER);
474
482
475
483
{
476
484
const char *err;
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
478
486
if(ret != GNUTLS_E_SUCCESS){
479
487
fprintf(stderr, "Syntax error at: %s\n", err);
480
488
fprintf(stderr, "GnuTLS error: %s\n",
485
493
}
486
494
487
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
496
mc.cred);
489
497
if(ret != GNUTLS_E_SUCCESS){
490
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
499
safer_gnutls_strerror(ret));
497
505
gnutls_certificate_server_set_request(*session,
498
506
GNUTLS_CERT_IGNORE);
499
507
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
501
509
502
510
return 0;
503
511
}
506
514
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
507
515
__attribute__((unused)) const char *txt){}
508
516
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
509
520
/* Called when a Mandos server is found */
510
521
static int start_mandos_communication(const char *ip, uint16_t port,
511
522
AvahiIfIndex if_index,
512
mandos_context *mc, int af){
513
int ret, tcp_sd;
523
int af){
524
int ret, tcp_sd = -1;
514
525
ssize_t sret;
515
526
union {
516
527
struct sockaddr_in in;
526
537
gnutls_session_t session;
527
538
int pf; /* Protocol family */
528
539
540
if(quit_now){
541
return -1;
542
}
543
529
544
switch(af){
530
545
case AF_INET6:
531
546
pf = PF_INET6;
538
553
return -1;
539
554
}
540
555
541
ret = init_gnutls_session(mc, &session);
556
ret = init_gnutls_session(&session);
542
557
if(ret != 0){
543
558
return -1;
544
559
}
551
566
tcp_sd = socket(pf, SOCK_STREAM, 0);
552
567
if(tcp_sd < 0){
553
568
perror("socket");
554
return -1;
569
retval = -1;
570
goto mandos_end;
571
}
572
573
if(quit_now){
574
goto mandos_end;
555
575
}
556
576
557
577
memset(&to, 0, sizeof(to));
558
578
if(af == AF_INET6){
559
to.in6.sin6_family = (uint16_t)af;
579
to.in6.sin6_family = (sa_family_t)af;
560
580
ret = inet_pton(af, ip, &to.in6.sin6_addr);
561
581
} else { /* IPv4 */
562
582
to.in.sin_family = (sa_family_t)af;
564
584
}
565
585
if(ret < 0 ){
566
586
perror("inet_pton");
567
return -1;
587
retval = -1;
588
goto mandos_end;
568
589
}
569
590
if(ret == 0){
570
591
fprintf(stderr, "Bad address: %s\n", ip);
571
return -1;
592
retval = -1;
593
goto mandos_end;
572
594
}
573
595
if(af == AF_INET6){
574
596
to.in6.sin6_port = htons(port); /* Spurious warnings from
581
603
if(if_index == AVAHI_IF_UNSPEC){
582
604
fprintf(stderr, "An IPv6 link-local address is incomplete"
583
605
" without a network interface\n");
584
return -1;
606
retval = -1;
607
goto mandos_end;
585
608
}
586
609
/* Set the network interface number as scope */
587
610
to.in6.sin6_scope_id = (uint32_t)if_index;
592
615
-Wunreachable-code */
593
616
}
594
617
618
if(quit_now){
619
goto mandos_end;
620
}
621
595
622
if(debug){
596
623
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
597
624
char interface[IF_NAMESIZE];
624
651
}
625
652
}
626
653
654
if(quit_now){
655
goto mandos_end;
656
}
657
627
658
if(af == AF_INET6){
628
659
ret = connect(tcp_sd, &to.in6, sizeof(to));
629
660
} else {
631
662
}
632
663
if(ret < 0){
633
664
perror("connect");
634
return -1;
665
retval = -1;
666
goto mandos_end;
667
}
668
669
if(quit_now){
670
goto mandos_end;
635
671
}
636
672
637
673
const char *out = mandos_protocol_version;
656
692
break;
657
693
}
658
694
}
695
696
if(quit_now){
697
goto mandos_end;
698
}
659
699
}
660
700
661
701
if(debug){
662
702
fprintf(stderr, "Establishing TLS session with %s\n", ip);
663
703
}
664
704
705
if(quit_now){
706
goto mandos_end;
707
}
708
665
709
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
666
710
711
if(quit_now){
712
goto mandos_end;
713
}
714
667
715
do{
668
716
ret = gnutls_handshake(session);
717
if(quit_now){
718
goto mandos_end;
719
}
669
720
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
670
721
671
722
if(ret != GNUTLS_E_SUCCESS){
685
736
}
686
737
687
738
while(true){
739
740
if(quit_now){
741
goto mandos_end;
742
}
743
688
744
buffer_capacity = incbuffer(&buffer, buffer_length,
689
745
buffer_capacity);
690
746
if(buffer_capacity == 0){
693
749
goto mandos_end;
694
750
}
695
751
752
if(quit_now){
753
goto mandos_end;
754
}
755
696
756
sret = gnutls_record_recv(session, buffer+buffer_length,
697
757
BUFFER_SIZE);
698
758
if(sret == 0){
706
766
case GNUTLS_E_REHANDSHAKE:
707
767
do{
708
768
ret = gnutls_handshake(session);
769
770
if(quit_now){
771
goto mandos_end;
772
}
709
773
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
710
774
if(ret < 0){
711
775
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
730
794
fprintf(stderr, "Closing TLS session\n");
731
795
}
732
796
797
if(quit_now){
798
goto mandos_end;
799
}
800
733
801
gnutls_bye(session, GNUTLS_SHUT_RDWR);
734
802
803
if(quit_now){
804
goto mandos_end;
805
}
806
735
807
if(buffer_length > 0){
736
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
808
decrypted_buffer_size = pgp_packet_decrypt(buffer,
737
809
buffer_length,
738
810
&decrypted_buffer);
739
811
if(decrypted_buffer_size >= 0){
740
812
written = 0;
741
813
while(written < (size_t) decrypted_buffer_size){
814
if(quit_now){
815
goto mandos_end;
816
}
817
742
818
ret = (int)fwrite(decrypted_buffer + written, 1,
743
819
(size_t)decrypted_buffer_size - written,
744
820
stdout);
764
840
765
841
mandos_end:
766
842
free(buffer);
767
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
843
if(tcp_sd >= 0){
844
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
845
}
768
846
if(ret == -1){
769
847
perror("close");
770
848
}
771
849
gnutls_deinit(session);
850
if(quit_now){
851
retval = -1;
852
}
772
853
return retval;
773
854
}
774
855
785
866
AVAHI_GCC_UNUSED AvahiStringList *txt,
786
867
AVAHI_GCC_UNUSED AvahiLookupResultFlags
787
868
flags,
788
void* userdata){
789
mandos_context *mc = userdata;
869
AVAHI_GCC_UNUSED void* userdata){
790
870
assert(r);
791
871
792
872
/* Called whenever a service has been resolved successfully or
793
873
timed out */
794
874
875
if(quit_now){
876
return;
877
}
878
795
879
switch(event){
796
880
default:
797
881
case AVAHI_RESOLVER_FAILURE:
798
882
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
799
883
" of type '%s' in domain '%s': %s\n", name, type, domain,
800
avahi_strerror(avahi_server_errno(mc->server)));
884
avahi_strerror(avahi_server_errno(mc.server)));
801
885
break;
802
886
803
887
case AVAHI_RESOLVER_FOUND:
809
893
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
810
894
ip, (intmax_t)interface, port);
811
895
}
812
int ret = start_mandos_communication(ip, port, interface, mc,
896
int ret = start_mandos_communication(ip, port, interface,
813
897
avahi_proto_to_af(proto));
814
898
if(ret == 0){
815
avahi_simple_poll_quit(mc->simple_poll);
899
avahi_simple_poll_quit(mc.simple_poll);
816
900
}
817
901
}
818
902
}
828
912
const char *domain,
829
913
AVAHI_GCC_UNUSED AvahiLookupResultFlags
830
914
flags,
831
void* userdata){
832
mandos_context *mc = userdata;
915
AVAHI_GCC_UNUSED void* userdata){
833
916
assert(b);
834
917
835
918
/* Called whenever a new services becomes available on the LAN or
836
919
is removed from the LAN */
837
920
921
if(quit_now){
922
return;
923
}
924
838
925
switch(event){
839
926
default:
840
927
case AVAHI_BROWSER_FAILURE:
841
928
842
929
fprintf(stderr, "(Avahi browser) %s\n",
843
avahi_strerror(avahi_server_errno(mc->server)));
844
avahi_simple_poll_quit(mc->simple_poll);
930
avahi_strerror(avahi_server_errno(mc.server)));
931
avahi_simple_poll_quit(mc.simple_poll);
845
932
return;
846
933
847
934
case AVAHI_BROWSER_NEW:
850
937
the callback function is called the Avahi server will free the
851
938
resolver for us. */
852
939
853
if(!(avahi_s_service_resolver_new(mc->server, interface,
854
protocol, name, type, domain,
855
AVAHI_PROTO_INET6, 0,
856
resolve_callback, mc)))
940
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
941
name, type, domain, protocol, 0,
942
resolve_callback, NULL) == NULL)
857
943
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
858
name, avahi_strerror(avahi_server_errno(mc->server)));
944
name, avahi_strerror(avahi_server_errno(mc.server)));
859
945
break;
860
946
861
947
case AVAHI_BROWSER_REMOVE:
870
956
}
871
957
}
872
958
959
/* stop main loop after sigterm has been called */
960
static void handle_sigterm(int sig){
961
if(quit_now){
962
return;
963
}
964
quit_now = 1;
965
signal_received = sig;
966
int old_errno = errno;
967
if(mc.simple_poll != NULL){
968
avahi_simple_poll_quit(mc.simple_poll);
969
}
970
errno = old_errno;
971
}
972
873
973
int main(int argc, char *argv[]){
874
974
AvahiSServiceBrowser *sb = NULL;
875
975
int error;
876
976
int ret;
877
977
intmax_t tmpmax;
878
int numchars;
978
char *tmp;
879
979
int exitcode = EXIT_SUCCESS;
880
980
const char *interface = "eth0";
881
981
struct ifreq network;
882
int sd;
982
int sd = -1;
983
bool take_down_interface = false;
883
984
uid_t uid;
884
985
gid_t gid;
885
986
char *connect_to = NULL;
889
990
const char *seckey = PATHDIR "/" SECKEY;
890
991
const char *pubkey = PATHDIR "/" PUBKEY;
891
992
892
mandos_context mc = { .simple_poll = NULL, .server = NULL,
893
.dh_bits = 1024, .priority = "SECURE256"
894
":!CTYPE-X.509:+CTYPE-OPENPGP" };
895
993
bool gnutls_initialized = false;
896
994
bool gpgme_initialized = false;
897
double delay = 2.5;
995
float delay = 2.5f;
996
997
struct sigaction old_sigterm_action;
998
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
898
999
899
1000
{
900
1001
struct argp_option options[] = {
952
1053
pubkey = arg;
953
1054
break;
954
1055
case 129: /* --dh-bits */
955
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
956
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
957
or arg[numchars] != '\0'){
1056
errno = 0;
1057
tmpmax = strtoimax(arg, &tmp, 10);
1058
if(errno != 0 or tmp == arg or *tmp != '\0'
1059
or tmpmax != (typeof(mc.dh_bits))tmpmax){
958
1060
fprintf(stderr, "Bad number of DH bits\n");
959
1061
exit(EXIT_FAILURE);
960
1062
}
964
1066
mc.priority = arg;
965
1067
break;
966
1068
case 131: /* --delay */
967
ret = sscanf(arg, "%lf%n", &delay, &numchars);
968
if(ret < 1 or arg[numchars] != '\0'){
1069
errno = 0;
1070
delay = strtof(arg, &tmp);
1071
if(errno != 0 or tmp == arg or *tmp != '\0'){
969
1072
fprintf(stderr, "Bad delay\n");
970
1073
exit(EXIT_FAILURE);
971
1074
}
992
1095
}
993
1096
}
994
1097
1098
if(not debug){
1099
avahi_set_log_function(empty_log);
1100
}
1101
1102
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1103
from the signal handler */
1104
/* Initialize the pseudo-RNG for Avahi */
1105
srand((unsigned int) time(NULL));
1106
mc.simple_poll = avahi_simple_poll_new();
1107
if(mc.simple_poll == NULL){
1108
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1109
exitcode = EXIT_FAILURE;
1110
goto end;
1111
}
1112
1113
sigemptyset(&sigterm_action.sa_mask);
1114
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1115
if(ret == -1){
1116
perror("sigaddset");
1117
exitcode = EXIT_FAILURE;
1118
goto end;
1119
}
1120
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1121
if(ret == -1){
1122
perror("sigaddset");
1123
exitcode = EXIT_FAILURE;
1124
goto end;
1125
}
1126
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1127
if(ret == -1){
1128
perror("sigaddset");
1129
exitcode = EXIT_FAILURE;
1130
goto end;
1131
}
1132
/* Need to check if the handler is SIG_IGN before handling:
1133
| [[info:libc:Initial Signal Actions]] |
1134
| [[info:libc:Basic Signal Handling]] |
1135
*/
1136
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1137
if(ret == -1){
1138
perror("sigaction");
1139
return EXIT_FAILURE;
1140
}
1141
if(old_sigterm_action.sa_handler != SIG_IGN){
1142
ret = sigaction(SIGINT, &sigterm_action, NULL);
1143
if(ret == -1){
1144
perror("sigaction");
1145
exitcode = EXIT_FAILURE;
1146
goto end;
1147
}
1148
}
1149
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1150
if(ret == -1){
1151
perror("sigaction");
1152
return EXIT_FAILURE;
1153
}
1154
if(old_sigterm_action.sa_handler != SIG_IGN){
1155
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1156
if(ret == -1){
1157
perror("sigaction");
1158
exitcode = EXIT_FAILURE;
1159
goto end;
1160
}
1161
}
1162
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1163
if(ret == -1){
1164
perror("sigaction");
1165
return EXIT_FAILURE;
1166
}
1167
if(old_sigterm_action.sa_handler != SIG_IGN){
1168
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1169
if(ret == -1){
1170
perror("sigaction");
1171
exitcode = EXIT_FAILURE;
1172
goto end;
1173
}
1174
}
1175
995
1176
/* If the interface is down, bring it up */
996
1177
if(interface[0] != '\0'){
1178
if_index = (AvahiIfIndex) if_nametoindex(interface);
1179
if(if_index == 0){
1180
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1181
exitcode = EXIT_FAILURE;
1182
goto end;
1183
}
1184
1185
if(quit_now){
1186
goto end;
1187
}
1188
997
1189
#ifdef __linux__
998
1190
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
999
1191
messages to mess up the prompt */
1003
1195
restore_loglevel = false;
1004
1196
perror("klogctl");
1005
1197
}
1006
#endif
1198
#endif /* __linux__ */
1007
1199
1008
1200
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1009
1201
if(sd < 0){
1016
1208
perror("klogctl");
1017
1209
}
1018
1210
}
1019
#endif
1211
#endif /* __linux__ */
1020
1212
goto end;
1021
1213
}
1022
1214
strcpy(network.ifr_name, interface);
1030
1222
perror("klogctl");
1031
1223
}
1032
1224
}
1033
#endif
1225
#endif /* __linux__ */
1034
1226
exitcode = EXIT_FAILURE;
1035
1227
goto end;
1036
1228
}
1037
1229
if((network.ifr_flags & IFF_UP) == 0){
1038
1230
network.ifr_flags |= IFF_UP;
1231
take_down_interface = true;
1039
1232
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1040
1233
if(ret == -1){
1234
take_down_interface = false;
1041
1235
perror("ioctl SIOCSIFFLAGS");
1042
1236
exitcode = EXIT_FAILURE;
1043
1237
#ifdef __linux__
1047
1241
perror("klogctl");
1048
1242
}
1049
1243
}
1050
#endif
1244
#endif /* __linux__ */
1051
1245
goto end;
1052
1246
}
1053
1247
}
1065
1259
perror("nanosleep");
1066
1260
}
1067
1261
}
1068
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1069
if(ret == -1){
1070
perror("close");
1262
if(not take_down_interface){
1263
/* We won't need the socket anymore */
1264
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1265
if(ret == -1){
1266
perror("close");
1267
}
1071
1268
}
1072
1269
#ifdef __linux__
1073
1270
if(restore_loglevel){
1077
1274
perror("klogctl");
1078
1275
}
1079
1276
}
1080
#endif
1277
#endif /* __linux__ */
1278
}
1279
1280
if(quit_now){
1281
goto end;
1081
1282
}
1082
1283
1083
1284
uid = getuid();
1094
1295
perror("setuid");
1095
1296
}
1096
1297
1097
ret = init_gnutls_global(&mc, pubkey, seckey);
1298
if(quit_now){
1299
goto end;
1300
}
1301
1302
ret = init_gnutls_global(pubkey, seckey);
1098
1303
if(ret == -1){
1099
1304
fprintf(stderr, "init_gnutls_global failed\n");
1100
1305
exitcode = EXIT_FAILURE;
1103
1308
gnutls_initialized = true;
1104
1309
}
1105
1310
1311
if(quit_now){
1312
goto end;
1313
}
1314
1315
tempdir_created = true;
1106
1316
if(mkdtemp(tempdir) == NULL){
1317
tempdir_created = false;
1107
1318
perror("mkdtemp");
1108
1319
goto end;
1109
1320
}
1110
tempdir_created = true;
1111
1112
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1321
1322
if(quit_now){
1323
goto end;
1324
}
1325
1326
if(not init_gpgme(pubkey, seckey, tempdir)){
1113
1327
fprintf(stderr, "init_gpgme failed\n");
1114
1328
exitcode = EXIT_FAILURE;
1115
1329
goto end;
1117
1331
gpgme_initialized = true;
1118
1332
}
1119
1333
1120
if(interface[0] != '\0'){
1121
if_index = (AvahiIfIndex) if_nametoindex(interface);
1122
if(if_index == 0){
1123
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1124
exitcode = EXIT_FAILURE;
1125
goto end;
1126
}
1334
if(quit_now){
1335
goto end;
1127
1336
}
1128
1337
1129
1338
if(connect_to != NULL){
1135
1344
exitcode = EXIT_FAILURE;
1136
1345
goto end;
1137
1346
}
1347
1348
if(quit_now){
1349
goto end;
1350
}
1351
1138
1352
uint16_t port;
1139
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1140
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1141
or address[numchars+1] != '\0'){
1353
errno = 0;
1354
tmpmax = strtoimax(address+1, &tmp, 10);
1355
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1356
or tmpmax != (uint16_t)tmpmax){
1142
1357
fprintf(stderr, "Bad port number\n");
1143
1358
exitcode = EXIT_FAILURE;
1144
1359
goto end;
1145
1360
}
1361
1362
if(quit_now){
1363
goto end;
1364
}
1365
1146
1366
port = (uint16_t)tmpmax;
1147
1367
*address = '\0';
1148
1368
address = connect_to;
1153
1373
} else {
1154
1374
af = AF_INET;
1155
1375
}
1156
ret = start_mandos_communication(address, port, if_index, &mc,
1157
af);
1376
1377
if(quit_now){
1378
goto end;
1379
}
1380
1381
ret = start_mandos_communication(address, port, if_index, af);
1158
1382
if(ret < 0){
1159
1383
exitcode = EXIT_FAILURE;
1160
1384
} else {
1163
1387
goto end;
1164
1388
}
1165
1389
1166
if(not debug){
1167
avahi_set_log_function(empty_log);
1168
}
1169
1170
/* Initialize the pseudo-RNG for Avahi */
1171
srand((unsigned int) time(NULL));
1172
1173
/* Allocate main Avahi loop object */
1174
mc.simple_poll = avahi_simple_poll_new();
1175
if(mc.simple_poll == NULL){
1176
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1177
exitcode = EXIT_FAILURE;
1390
if(quit_now){
1178
1391
goto end;
1179
1392
}
1180
1393
1204
1417
goto end;
1205
1418
}
1206
1419
1420
if(quit_now){
1421
goto end;
1422
}
1423
1207
1424
/* Create the Avahi service browser */
1208
1425
sb = avahi_s_service_browser_new(mc.server, if_index,
1209
AVAHI_PROTO_INET6, "_mandos._tcp",
1210
NULL, 0, browse_callback, &mc);
1426
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1427
NULL, 0, browse_callback, NULL);
1211
1428
if(sb == NULL){
1212
1429
fprintf(stderr, "Failed to create service browser: %s\n",
1213
1430
avahi_strerror(avahi_server_errno(mc.server)));
1215
1432
goto end;
1216
1433
}
1217
1434
1435
if(quit_now){
1436
goto end;
1437
}
1438
1218
1439
/* Run the main loop */
1219
1440
1220
1441
if(debug){
1249
1470
gpgme_release(mc.ctx);
1250
1471
}
1251
1472
1473
/* Take down the network interface */
1474
if(take_down_interface){
1475
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1476
if(ret == -1){
1477
perror("ioctl SIOCGIFFLAGS");
1478
} else if(network.ifr_flags & IFF_UP) {
1479
network.ifr_flags &= ~IFF_UP; /* clear flag */
1480
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1481
if(ret == -1){
1482
perror("ioctl SIOCSIFFLAGS");
1483
}
1484
}
1485
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1486
if(ret == -1){
1487
perror("close");
1488
}
1489
}
1490
1252
1491
/* Removes the temp directory used by GPGME */
1253
1492
if(tempdir_created){
1254
1493
DIR *d;
1293
1532
}
1294
1533
}
1295
1534
1535
if(quit_now){
1536
sigemptyset(&old_sigterm_action.sa_mask);
1537
old_sigterm_action.sa_handler = SIG_DFL;
1538
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1539
if(ret == -1){
1540
perror("sigaction");
1541
}
1542
raise(signal_received);
1543
}
1544
1296
1545
return exitcode;
1297
1546
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0