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- Committer: Teddy Hogeborn
- Date: 2009-01-24 14:24:54 UTC
- Revision ID: teddy@fukt.bsnet.se-20090124142454-32yvrhezuucam9vz
* plugins.d/mandos-client.xml (DESCRIPTION): Mention the bringing up
of a network interface.
of a network interface.
- 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
34
33
#define _LARGEFILE_SOURCE
35
#endif
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
38
#endif
39
35
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
37
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
stdout, ferror(), sscanf */
44
40
#include <stdint.h> /* uint16_t, uint32_t */
45
41
#include <stddef.h> /* NULL, size_t, ssize_t */
46
42
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
43
srand() */
44
#include <stdbool.h> /* bool, true */
49
45
#include <string.h> /* memset(), strcmp(), strlen(),
50
46
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
47
#include <sys/ioctl.h> /* ioctl */
52
48
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
49
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
50
SOCK_STREAM, INET6_ADDRSTRLEN,
51
uid_t, gid_t, open(), opendir(),
52
DIR */
56
53
#include <sys/stat.h> /* open() */
57
54
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
55
struct in6_addr, inet_pton(),
56
connect() */
59
57
#include <fcntl.h> /* open() */
60
58
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
59
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
60
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
64
61
#include <assert.h> /* assert() */
65
62
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
63
#include <time.h> /* time() */
67
64
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
65
SIOCSIFFLAGS, if_indextoname(),
69
66
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
67
#include <netinet/in.h>
73
68
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
69
getuid(), getgid(), setuid(),
75
70
setgid() */
76
71
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
72
#include <iso646.h> /* not, and, or */
78
73
#include <argp.h> /* struct argp_option, error_t, struct
79
74
argp_state, struct argp,
80
75
argp_parse(), ARGP_KEY_ARG,
81
76
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sig_atomic_t,
84
raise() */
85
86
#ifdef __linux__
87
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
89
77
90
78
/* Avahi */
91
79
/* All Avahi types, constants and functions
137
125
gpgme_ctx_t ctx;
138
126
} mandos_context;
139
127
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
145
128
/*
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
129
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
130
* "buffer_capacity" is how much is currently allocated,
148
131
* "buffer_length" is how much is already used.
149
132
*/
150
size_t incbuffer(char **buffer, size_t buffer_length,
133
size_t adjustbuffer(char **buffer, size_t buffer_length,
151
134
size_t buffer_capacity){
152
135
if(buffer_length + BUFFER_SIZE > buffer_capacity){
153
136
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
162
145
/*
163
146
* Initialize GPGME.
164
147
*/
165
static bool init_gpgme(const char *seckey,
148
static bool init_gpgme(mandos_context *mc, const char *seckey,
166
149
const char *pubkey, const char *tempdir){
167
150
int ret;
168
151
gpgme_error_t rc;
170
153
171
154
172
155
/*
173
* Helper function to insert pub and seckey to the engine keyring.
156
* Helper function to insert pub and seckey to the enigne keyring.
174
157
*/
175
158
bool import_key(const char *filename){
176
159
int fd;
189
172
return false;
190
173
}
191
174
192
rc = gpgme_op_import(mc.ctx, pgp_data);
175
rc = gpgme_op_import(mc->ctx, pgp_data);
193
176
if(rc != GPG_ERR_NO_ERROR){
194
177
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
178
gpgme_strsource(rc), gpgme_strerror(rc));
205
188
}
206
189
207
190
if(debug){
208
fprintf(stderr, "Initializing GPGME\n");
191
fprintf(stderr, "Initialize gpgme\n");
209
192
}
210
193
211
194
/* Init GPGME */
238
221
}
239
222
240
223
/* Create new GPGME "context" */
241
rc = gpgme_new(&(mc.ctx));
224
rc = gpgme_new(&(mc->ctx));
242
225
if(rc != GPG_ERR_NO_ERROR){
243
226
fprintf(stderr, "bad gpgme_new: %s: %s\n",
244
227
gpgme_strsource(rc), gpgme_strerror(rc));
256
239
* Decrypt OpenPGP data.
257
240
* Returns -1 on error
258
241
*/
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
242
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
243
const char *cryptotext,
260
244
size_t crypto_size,
261
245
char **plaintext){
262
246
gpgme_data_t dh_crypto, dh_plain;
289
273
290
274
/* Decrypt data from the cryptotext data buffer to the plaintext
291
275
data buffer */
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
276
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
293
277
if(rc != GPG_ERR_NO_ERROR){
294
278
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
279
gpgme_strsource(rc), gpgme_strerror(rc));
296
280
plaintext_length = -1;
297
281
if(debug){
298
282
gpgme_decrypt_result_t result;
299
result = gpgme_op_decrypt_result(mc.ctx);
283
result = gpgme_op_decrypt_result(mc->ctx);
300
284
if(result == NULL){
301
285
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
302
286
} else {
309
293
}
310
294
gpgme_recipient_t recipient;
311
295
recipient = result->recipients;
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;
296
if(recipient){
297
while(recipient != NULL){
298
fprintf(stderr, "Public key algorithm: %s\n",
299
gpgme_pubkey_algo_name(recipient->pubkey_algo));
300
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
301
fprintf(stderr, "Secret key available: %s\n",
302
recipient->status == GPG_ERR_NO_SECKEY
303
? "No" : "Yes");
304
recipient = recipient->next;
305
}
320
306
}
321
307
}
322
308
}
336
322
337
323
*plaintext = NULL;
338
324
while(true){
339
plaintext_capacity = incbuffer(plaintext,
325
plaintext_capacity = adjustbuffer(plaintext,
340
326
(size_t)plaintext_length,
341
327
plaintext_capacity);
342
328
if(plaintext_capacity == 0){
343
perror("incbuffer");
329
perror("adjustbuffer");
344
330
plaintext_length = -1;
345
331
goto decrypt_end;
346
332
}
378
364
return plaintext_length;
379
365
}
380
366
381
static const char * safer_gnutls_strerror(int value){
367
static const char * safer_gnutls_strerror(int value) {
382
368
const char *ret = gnutls_strerror(value); /* Spurious warning from
383
369
-Wunreachable-code */
384
370
if(ret == NULL)
392
378
fprintf(stderr, "GnuTLS: %s", string);
393
379
}
394
380
395
static int init_gnutls_global(const char *pubkeyfilename,
381
static int init_gnutls_global(mandos_context *mc,
382
const char *pubkeyfilename,
396
383
const char *seckeyfilename){
397
384
int ret;
398
385
401
388
}
402
389
403
390
ret = gnutls_global_init();
404
if(ret != GNUTLS_E_SUCCESS){
391
if(ret != GNUTLS_E_SUCCESS) {
405
392
fprintf(stderr, "GnuTLS global_init: %s\n",
406
393
safer_gnutls_strerror(ret));
407
394
return -1;
416
403
}
417
404
418
405
/* OpenPGP credentials */
419
gnutls_certificate_allocate_credentials(&mc.cred);
406
gnutls_certificate_allocate_credentials(&mc->cred);
420
407
if(ret != GNUTLS_E_SUCCESS){
421
408
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
409
* from
410
* -Wunreachable-code
411
*/
425
412
safer_gnutls_strerror(ret));
426
413
gnutls_global_deinit();
427
414
return -1;
434
421
}
435
422
436
423
ret = gnutls_certificate_set_openpgp_key_file
437
(mc.cred, pubkeyfilename, seckeyfilename,
424
(mc->cred, pubkeyfilename, seckeyfilename,
438
425
GNUTLS_OPENPGP_FMT_BASE64);
439
if(ret != GNUTLS_E_SUCCESS){
426
if(ret != GNUTLS_E_SUCCESS) {
440
427
fprintf(stderr,
441
428
"Error[%d] while reading the OpenPGP key pair ('%s',"
442
429
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
433
}
447
434
448
435
/* GnuTLS server initialization */
449
ret = gnutls_dh_params_init(&mc.dh_params);
450
if(ret != GNUTLS_E_SUCCESS){
436
ret = gnutls_dh_params_init(&mc->dh_params);
437
if(ret != GNUTLS_E_SUCCESS) {
451
438
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
439
" %s\n", safer_gnutls_strerror(ret));
453
440
goto globalfail;
454
441
}
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
456
if(ret != GNUTLS_E_SUCCESS){
442
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
443
if(ret != GNUTLS_E_SUCCESS) {
457
444
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
445
safer_gnutls_strerror(ret));
459
446
goto globalfail;
460
447
}
461
448
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
449
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
463
450
464
451
return 0;
465
452
466
453
globalfail:
467
454
468
gnutls_certificate_free_credentials(mc.cred);
455
gnutls_certificate_free_credentials(mc->cred);
469
456
gnutls_global_deinit();
470
gnutls_dh_params_deinit(mc.dh_params);
457
gnutls_dh_params_deinit(mc->dh_params);
471
458
return -1;
472
459
}
473
460
474
static int init_gnutls_session(gnutls_session_t *session){
461
static int init_gnutls_session(mandos_context *mc,
462
gnutls_session_t *session){
475
463
int ret;
476
464
/* GnuTLS session creation */
477
465
ret = gnutls_init(session, GNUTLS_SERVER);
482
470
483
471
{
484
472
const char *err;
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
486
if(ret != GNUTLS_E_SUCCESS){
473
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
474
if(ret != GNUTLS_E_SUCCESS) {
487
475
fprintf(stderr, "Syntax error at: %s\n", err);
488
476
fprintf(stderr, "GnuTLS error: %s\n",
489
477
safer_gnutls_strerror(ret));
493
481
}
494
482
495
483
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
497
if(ret != GNUTLS_E_SUCCESS){
484
mc->cred);
485
if(ret != GNUTLS_E_SUCCESS) {
498
486
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
487
safer_gnutls_strerror(ret));
500
488
gnutls_deinit(*session);
505
493
gnutls_certificate_server_set_request(*session,
506
494
GNUTLS_CERT_IGNORE);
507
495
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
496
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
509
497
510
498
return 0;
511
499
}
514
502
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
515
503
__attribute__((unused)) const char *txt){}
516
504
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
520
505
/* Called when a Mandos server is found */
521
506
static int start_mandos_communication(const char *ip, uint16_t port,
522
507
AvahiIfIndex if_index,
523
int af){
508
mandos_context *mc){
524
509
int ret, tcp_sd;
525
510
ssize_t sret;
526
union {
527
struct sockaddr_in in;
528
struct sockaddr_in6 in6;
529
} to;
511
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
530
512
char *buffer = NULL;
531
513
char *decrypted_buffer;
532
514
size_t buffer_length = 0;
534
516
ssize_t decrypted_buffer_size;
535
517
size_t written;
536
518
int retval = 0;
519
char interface[IF_NAMESIZE];
537
520
gnutls_session_t session;
538
int pf; /* Protocol family */
539
540
switch(af){
541
case AF_INET6:
542
pf = PF_INET6;
543
break;
544
case AF_INET:
545
pf = PF_INET;
546
break;
547
default:
548
fprintf(stderr, "Bad address family: %d\n", af);
549
return -1;
550
}
551
552
ret = init_gnutls_session(&session);
521
522
ret = init_gnutls_session(mc, &session);
553
523
if(ret != 0){
554
524
return -1;
555
525
}
556
526
557
527
if(debug){
558
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
528
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
559
529
"\n", ip, port);
560
530
}
561
531
562
tcp_sd = socket(pf, SOCK_STREAM, 0);
563
if(tcp_sd < 0){
532
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
533
if(tcp_sd < 0) {
564
534
perror("socket");
565
535
return -1;
566
536
}
567
537
538
if(debug){
539
if(if_indextoname((unsigned int)if_index, interface) == NULL){
540
perror("if_indextoname");
541
return -1;
542
}
543
fprintf(stderr, "Binding to interface %s\n", interface);
544
}
545
568
546
memset(&to, 0, sizeof(to));
569
if(af == AF_INET6){
570
to.in6.sin6_family = (sa_family_t)af;
571
ret = inet_pton(af, ip, &to.in6.sin6_addr);
572
} else { /* IPv4 */
573
to.in.sin_family = (sa_family_t)af;
574
ret = inet_pton(af, ip, &to.in.sin_addr);
575
}
547
to.in6.sin6_family = AF_INET6;
548
/* It would be nice to have a way to detect if we were passed an
549
IPv4 address here. Now we assume an IPv6 address. */
550
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
576
551
if(ret < 0 ){
577
552
perror("inet_pton");
578
553
return -1;
581
556
fprintf(stderr, "Bad address: %s\n", ip);
582
557
return -1;
583
558
}
584
if(af == AF_INET6){
585
to.in6.sin6_port = htons(port); /* Spurious warnings from
586
-Wconversion and
587
-Wunreachable-code */
588
589
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
590
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
591
-Wunreachable-code*/
592
if(if_index == AVAHI_IF_UNSPEC){
593
fprintf(stderr, "An IPv6 link-local address is incomplete"
594
" without a network interface\n");
595
return -1;
596
}
597
/* Set the network interface number as scope */
598
to.in6.sin6_scope_id = (uint32_t)if_index;
599
}
600
} else {
601
to.in.sin_port = htons(port); /* Spurious warnings from
559
to.in6.sin6_port = htons(port); /* Spurious warnings from
602
560
-Wconversion and
603
561
-Wunreachable-code */
604
}
562
563
to.in6.sin6_scope_id = (uint32_t)if_index;
605
564
606
565
if(debug){
607
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
608
char interface[IF_NAMESIZE];
609
if(if_indextoname((unsigned int)if_index, interface) == NULL){
610
perror("if_indextoname");
611
} else {
612
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
613
ip, interface, port);
614
}
615
} else {
616
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
617
port);
618
}
619
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
620
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
621
const char *pcret;
622
if(af == AF_INET6){
623
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
624
sizeof(addrstr));
625
} else {
626
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
627
sizeof(addrstr));
628
}
629
if(pcret == NULL){
566
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
567
port);
568
char addrstr[INET6_ADDRSTRLEN] = "";
569
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
570
sizeof(addrstr)) == NULL){
630
571
perror("inet_ntop");
631
572
} else {
632
573
if(strcmp(addrstr, ip) != 0){
635
576
}
636
577
}
637
578
638
if(af == AF_INET6){
639
ret = connect(tcp_sd, &to.in6, sizeof(to));
640
} else {
641
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
642
}
579
ret = connect(tcp_sd, &to.in, sizeof(to));
643
580
if(ret < 0){
644
581
perror("connect");
645
582
return -1;
691
628
/* Read OpenPGP packet that contains the wanted password */
692
629
693
630
if(debug){
694
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
631
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
695
632
ip);
696
633
}
697
634
698
635
while(true){
699
buffer_capacity = incbuffer(&buffer, buffer_length,
636
buffer_capacity = adjustbuffer(&buffer, buffer_length,
700
637
buffer_capacity);
701
638
if(buffer_capacity == 0){
702
perror("incbuffer");
639
perror("adjustbuffer");
703
640
retval = -1;
704
641
goto mandos_end;
705
642
}
744
681
gnutls_bye(session, GNUTLS_SHUT_RDWR);
745
682
746
683
if(buffer_length > 0){
747
decrypted_buffer_size = pgp_packet_decrypt(buffer,
684
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
748
685
buffer_length,
749
686
&decrypted_buffer);
750
687
if(decrypted_buffer_size >= 0){
785
722
786
723
static void resolve_callback(AvahiSServiceResolver *r,
787
724
AvahiIfIndex interface,
788
AvahiProtocol proto,
725
AVAHI_GCC_UNUSED AvahiProtocol protocol,
789
726
AvahiResolverEvent event,
790
727
const char *name,
791
728
const char *type,
796
733
AVAHI_GCC_UNUSED AvahiStringList *txt,
797
734
AVAHI_GCC_UNUSED AvahiLookupResultFlags
798
735
flags,
799
AVAHI_GCC_UNUSED void* userdata){
736
void* userdata) {
737
mandos_context *mc = userdata;
800
738
assert(r);
801
739
802
740
/* Called whenever a service has been resolved successfully or
803
741
timed out */
804
742
805
if(quit_now){
806
return;
807
}
808
809
switch(event){
743
switch(event) {
810
744
default:
811
745
case AVAHI_RESOLVER_FAILURE:
812
746
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
813
747
" of type '%s' in domain '%s': %s\n", name, type, domain,
814
avahi_strerror(avahi_server_errno(mc.server)));
748
avahi_strerror(avahi_server_errno(mc->server)));
815
749
break;
816
750
817
751
case AVAHI_RESOLVER_FOUND:
823
757
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
824
758
ip, (intmax_t)interface, port);
825
759
}
826
int ret = start_mandos_communication(ip, port, interface,
827
avahi_proto_to_af(proto));
760
int ret = start_mandos_communication(ip, port, interface, mc);
828
761
if(ret == 0){
829
avahi_simple_poll_quit(mc.simple_poll);
762
avahi_simple_poll_quit(mc->simple_poll);
830
763
}
831
764
}
832
765
}
833
766
avahi_s_service_resolver_free(r);
834
767
}
835
768
836
static void browse_callback(AvahiSServiceBrowser *b,
837
AvahiIfIndex interface,
838
AvahiProtocol protocol,
839
AvahiBrowserEvent event,
840
const char *name,
841
const char *type,
842
const char *domain,
843
AVAHI_GCC_UNUSED AvahiLookupResultFlags
844
flags,
845
AVAHI_GCC_UNUSED void* userdata){
769
static void browse_callback( AvahiSServiceBrowser *b,
770
AvahiIfIndex interface,
771
AvahiProtocol protocol,
772
AvahiBrowserEvent event,
773
const char *name,
774
const char *type,
775
const char *domain,
776
AVAHI_GCC_UNUSED AvahiLookupResultFlags
777
flags,
778
void* userdata) {
779
mandos_context *mc = userdata;
846
780
assert(b);
847
781
848
782
/* Called whenever a new services becomes available on the LAN or
849
783
is removed from the LAN */
850
784
851
switch(event){
785
switch(event) {
852
786
default:
853
787
case AVAHI_BROWSER_FAILURE:
854
788
855
789
fprintf(stderr, "(Avahi browser) %s\n",
856
avahi_strerror(avahi_server_errno(mc.server)));
857
avahi_simple_poll_quit(mc.simple_poll);
790
avahi_strerror(avahi_server_errno(mc->server)));
791
avahi_simple_poll_quit(mc->simple_poll);
858
792
return;
859
793
860
794
case AVAHI_BROWSER_NEW:
863
797
the callback function is called the Avahi server will free the
864
798
resolver for us. */
865
799
866
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
867
name, type, domain, protocol, 0,
868
resolve_callback, NULL) == NULL)
800
if(!(avahi_s_service_resolver_new(mc->server, interface,
801
protocol, name, type, domain,
802
AVAHI_PROTO_INET6, 0,
803
resolve_callback, mc)))
869
804
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
870
name, avahi_strerror(avahi_server_errno(mc.server)));
805
name, avahi_strerror(avahi_server_errno(mc->server)));
871
806
break;
872
807
873
808
case AVAHI_BROWSER_REMOVE:
882
817
}
883
818
}
884
819
885
/* stop main loop after sigterm has been called */
886
static void handle_sigterm(int sig){
887
if(quit_now){
888
return;
889
}
890
quit_now = 1;
891
signal_received = sig;
892
int old_errno = errno;
893
if(mc.simple_poll != NULL){
894
avahi_simple_poll_quit(mc.simple_poll);
895
}
896
errno = old_errno;
897
}
898
899
820
int main(int argc, char *argv[]){
900
AvahiSServiceBrowser *sb = NULL;
901
int error;
902
int ret;
903
intmax_t tmpmax;
904
char *tmp;
905
int exitcode = EXIT_SUCCESS;
906
const char *interface = "eth0";
907
struct ifreq network;
908
int sd = -1;
909
bool take_down_interface = false;
910
uid_t uid;
911
gid_t gid;
912
char *connect_to = NULL;
913
char tempdir[] = "/tmp/mandosXXXXXX";
914
bool tempdir_created = false;
915
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
916
const char *seckey = PATHDIR "/" SECKEY;
917
const char *pubkey = PATHDIR "/" PUBKEY;
918
919
bool gnutls_initialized = false;
920
bool gpgme_initialized = false;
921
float delay = 2.5f;
922
923
struct sigaction old_sigterm_action;
924
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
925
926
{
927
struct argp_option options[] = {
928
{ .name = "debug", .key = 128,
929
.doc = "Debug mode", .group = 3 },
930
{ .name = "connect", .key = 'c',
931
.arg = "ADDRESS:PORT",
932
.doc = "Connect directly to a specific Mandos server",
933
.group = 1 },
934
{ .name = "interface", .key = 'i',
935
.arg = "NAME",
936
.doc = "Network interface that will be used to search for"
937
" Mandos servers",
938
.group = 1 },
939
{ .name = "seckey", .key = 's',
940
.arg = "FILE",
941
.doc = "OpenPGP secret key file base name",
942
.group = 1 },
943
{ .name = "pubkey", .key = 'p',
944
.arg = "FILE",
945
.doc = "OpenPGP public key file base name",
946
.group = 2 },
947
{ .name = "dh-bits", .key = 129,
948
.arg = "BITS",
949
.doc = "Bit length of the prime number used in the"
950
" Diffie-Hellman key exchange",
951
.group = 2 },
952
{ .name = "priority", .key = 130,
953
.arg = "STRING",
954
.doc = "GnuTLS priority string for the TLS handshake",
955
.group = 1 },
956
{ .name = "delay", .key = 131,
957
.arg = "SECONDS",
958
.doc = "Maximum delay to wait for interface startup",
959
.group = 2 },
960
{ .name = NULL }
961
};
962
963
error_t parse_opt(int key, char *arg,
964
struct argp_state *state){
965
switch(key){
966
case 128: /* --debug */
967
debug = true;
968
break;
969
case 'c': /* --connect */
970
connect_to = arg;
971
break;
972
case 'i': /* --interface */
973
interface = arg;
974
break;
975
case 's': /* --seckey */
976
seckey = arg;
977
break;
978
case 'p': /* --pubkey */
979
pubkey = arg;
980
break;
981
case 129: /* --dh-bits */
982
errno = 0;
983
tmpmax = strtoimax(arg, &tmp, 10);
984
if(errno != 0 or tmp == arg or *tmp != '\0'
985
or tmpmax != (typeof(mc.dh_bits))tmpmax){
986
fprintf(stderr, "Bad number of DH bits\n");
987
exit(EXIT_FAILURE);
988
}
989
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
990
break;
991
case 130: /* --priority */
992
mc.priority = arg;
993
break;
994
case 131: /* --delay */
995
errno = 0;
996
delay = strtof(arg, &tmp);
997
if(errno != 0 or tmp == arg or *tmp != '\0'){
998
fprintf(stderr, "Bad delay\n");
999
exit(EXIT_FAILURE);
1000
}
1001
break;
1002
case ARGP_KEY_ARG:
1003
argp_usage(state);
1004
case ARGP_KEY_END:
1005
break;
1006
default:
1007
return ARGP_ERR_UNKNOWN;
1008
}
1009
return 0;
1010
}
1011
1012
struct argp argp = { .options = options, .parser = parse_opt,
1013
.args_doc = "",
1014
.doc = "Mandos client -- Get and decrypt"
1015
" passwords from a Mandos server" };
1016
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1017
if(ret == ARGP_ERR_UNKNOWN){
1018
fprintf(stderr, "Unknown error while parsing arguments\n");
1019
exitcode = EXIT_FAILURE;
1020
goto end;
1021
}
1022
}
1023
1024
if(not debug){
1025
avahi_set_log_function(empty_log);
1026
}
1027
1028
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1029
from the signal handler */
1030
/* Initialize the pseudo-RNG for Avahi */
1031
srand((unsigned int) time(NULL));
1032
mc.simple_poll = avahi_simple_poll_new();
1033
if(mc.simple_poll == NULL){
1034
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1035
exitcode = EXIT_FAILURE;
1036
goto end;
1037
}
1038
1039
sigemptyset(&sigterm_action.sa_mask);
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1041
if(ret == -1){
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1044
goto end;
1045
}
1046
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1047
if(ret == -1){
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1050
goto end;
1051
}
1052
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1053
if(ret == -1){
1054
perror("sigaddset");
1055
exitcode = EXIT_FAILURE;
1056
goto end;
1057
}
1058
ret = sigaction(SIGINT, &sigterm_action, &old_sigterm_action);
1059
if(ret == -1){
1060
perror("sigaction");
1061
exitcode = EXIT_FAILURE;
1062
goto end;
1063
}
1064
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1065
if(ret == -1){
1066
perror("sigaction");
1067
exitcode = EXIT_FAILURE;
1068
goto end;
1069
}
1070
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1071
if(ret == -1){
1072
perror("sigaction");
1073
exitcode = EXIT_FAILURE;
1074
goto end;
1075
}
1076
1077
/* If the interface is down, bring it up */
1078
if(interface[0] != '\0'){
1079
if_index = (AvahiIfIndex) if_nametoindex(interface);
1080
if(if_index == 0){
1081
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1082
exitcode = EXIT_FAILURE;
1083
goto end;
1084
}
1085
1086
if(quit_now){
1087
goto end;
1088
}
1089
1090
#ifdef __linux__
1091
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1092
messages to mess up the prompt */
1093
ret = klogctl(8, NULL, 5);
1094
bool restore_loglevel = true;
1095
if(ret == -1){
1096
restore_loglevel = false;
1097
perror("klogctl");
1098
}
1099
#endif /* __linux__ */
1100
1101
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1102
if(sd < 0){
1103
perror("socket");
1104
exitcode = EXIT_FAILURE;
1105
#ifdef __linux__
1106
if(restore_loglevel){
1107
ret = klogctl(7, NULL, 0);
1108
if(ret == -1){
1109
perror("klogctl");
1110
}
1111
}
1112
#endif /* __linux__ */
1113
goto end;
1114
}
1115
strcpy(network.ifr_name, interface);
1116
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1117
if(ret == -1){
1118
perror("ioctl SIOCGIFFLAGS");
1119
#ifdef __linux__
1120
if(restore_loglevel){
1121
ret = klogctl(7, NULL, 0);
1122
if(ret == -1){
1123
perror("klogctl");
1124
}
1125
}
1126
#endif /* __linux__ */
1127
exitcode = EXIT_FAILURE;
1128
goto end;
1129
}
1130
if((network.ifr_flags & IFF_UP) == 0){
1131
network.ifr_flags |= IFF_UP;
1132
take_down_interface = true;
1133
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1134
if(ret == -1){
1135
take_down_interface = false;
1136
perror("ioctl SIOCSIFFLAGS");
1137
exitcode = EXIT_FAILURE;
1138
#ifdef __linux__
1139
if(restore_loglevel){
1140
ret = klogctl(7, NULL, 0);
1141
if(ret == -1){
1142
perror("klogctl");
821
AvahiSServiceBrowser *sb = NULL;
822
int error;
823
int ret;
824
intmax_t tmpmax;
825
int numchars;
826
int exitcode = EXIT_SUCCESS;
827
const char *interface = "eth0";
828
struct ifreq network;
829
int sd;
830
uid_t uid;
831
gid_t gid;
832
char *connect_to = NULL;
833
char tempdir[] = "/tmp/mandosXXXXXX";
834
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
835
const char *seckey = PATHDIR "/" SECKEY;
836
const char *pubkey = PATHDIR "/" PUBKEY;
837
838
mandos_context mc = { .simple_poll = NULL, .server = NULL,
839
.dh_bits = 1024, .priority = "SECURE256"
840
":!CTYPE-X.509:+CTYPE-OPENPGP" };
841
bool gnutls_initialized = false;
842
bool gpgme_initialized = false;
843
844
{
845
struct argp_option options[] = {
846
{ .name = "debug", .key = 128,
847
.doc = "Debug mode", .group = 3 },
848
{ .name = "connect", .key = 'c',
849
.arg = "ADDRESS:PORT",
850
.doc = "Connect directly to a specific Mandos server",
851
.group = 1 },
852
{ .name = "interface", .key = 'i',
853
.arg = "NAME",
854
.doc = "Interface that will be used to search for Mandos"
855
" servers",
856
.group = 1 },
857
{ .name = "seckey", .key = 's',
858
.arg = "FILE",
859
.doc = "OpenPGP secret key file base name",
860
.group = 1 },
861
{ .name = "pubkey", .key = 'p',
862
.arg = "FILE",
863
.doc = "OpenPGP public key file base name",
864
.group = 2 },
865
{ .name = "dh-bits", .key = 129,
866
.arg = "BITS",
867
.doc = "Bit length of the prime number used in the"
868
" Diffie-Hellman key exchange",
869
.group = 2 },
870
{ .name = "priority", .key = 130,
871
.arg = "STRING",
872
.doc = "GnuTLS priority string for the TLS handshake",
873
.group = 1 },
874
{ .name = NULL }
875
};
876
877
error_t parse_opt(int key, char *arg,
878
struct argp_state *state) {
879
switch(key) {
880
case 128: /* --debug */
881
debug = true;
882
break;
883
case 'c': /* --connect */
884
connect_to = arg;
885
break;
886
case 'i': /* --interface */
887
interface = arg;
888
break;
889
case 's': /* --seckey */
890
seckey = arg;
891
break;
892
case 'p': /* --pubkey */
893
pubkey = arg;
894
break;
895
case 129: /* --dh-bits */
896
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
897
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
898
or arg[numchars] != '\0'){
899
fprintf(stderr, "Bad number of DH bits\n");
900
exit(EXIT_FAILURE);
1143
901
}
902
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
903
break;
904
case 130: /* --priority */
905
mc.priority = arg;
906
break;
907
case ARGP_KEY_ARG:
908
argp_usage(state);
909
case ARGP_KEY_END:
910
break;
911
default:
912
return ARGP_ERR_UNKNOWN;
1144
913
}
1145
#endif /* __linux__ */
914
return 0;
915
}
916
917
struct argp argp = { .options = options, .parser = parse_opt,
918
.args_doc = "",
919
.doc = "Mandos client -- Get and decrypt"
920
" passwords from a Mandos server" };
921
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
922
if(ret == ARGP_ERR_UNKNOWN){
923
fprintf(stderr, "Unknown error while parsing arguments\n");
924
exitcode = EXIT_FAILURE;
1146
925
goto end;
1147
926
}
1148
927
}
1149
/* sleep checking until interface is running */
1150
for(int i=0; i < delay * 4; i++){
928
929
/* If the interface is down, bring it up */
930
{
931
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
932
if(sd < 0) {
933
perror("socket");
934
exitcode = EXIT_FAILURE;
935
goto end;
936
}
937
strcpy(network.ifr_name, interface);
1151
938
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1152
939
if(ret == -1){
1153
940
perror("ioctl SIOCGIFFLAGS");
1154
} else if(network.ifr_flags & IFF_RUNNING){
1155
break;
1156
}
1157
struct timespec sleeptime = { .tv_nsec = 250000000 };
1158
ret = nanosleep(&sleeptime, NULL);
1159
if(ret == -1 and errno != EINTR){
1160
perror("nanosleep");
1161
}
1162
}
1163
if(not take_down_interface){
1164
/* We won't need the socket anymore */
941
exitcode = EXIT_FAILURE;
942
goto end;
943
}
944
if((network.ifr_flags & IFF_UP) == 0){
945
network.ifr_flags |= IFF_UP;
946
ret = ioctl(sd, SIOCSIFFLAGS, &network);
947
if(ret == -1){
948
perror("ioctl SIOCSIFFLAGS");
949
exitcode = EXIT_FAILURE;
950
goto end;
951
}
952
}
1165
953
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1166
954
if(ret == -1){
1167
955
perror("close");
1168
956
}
1169
957
}
1170
#ifdef __linux__
1171
if(restore_loglevel){
1172
/* Restores kernel loglevel to default */
1173
ret = klogctl(7, NULL, 0);
1174
if(ret == -1){
1175
perror("klogctl");
1176
}
1177
}
1178
#endif /* __linux__ */
1179
}
1180
1181
if(quit_now){
1182
goto end;
1183
}
1184
1185
uid = getuid();
1186
gid = getgid();
1187
1188
errno = 0;
1189
setgid(gid);
1190
if(ret == -1){
1191
perror("setgid");
1192
}
1193
1194
ret = setuid(uid);
1195
if(ret == -1){
1196
perror("setuid");
1197
}
1198
1199
if(quit_now){
1200
goto end;
1201
}
1202
1203
ret = init_gnutls_global(pubkey, seckey);
1204
if(ret == -1){
1205
fprintf(stderr, "init_gnutls_global failed\n");
1206
exitcode = EXIT_FAILURE;
1207
goto end;
1208
} else {
1209
gnutls_initialized = true;
1210
}
1211
1212
if(quit_now){
1213
goto end;
1214
}
1215
1216
tempdir_created = true;
1217
if(mkdtemp(tempdir) == NULL){
1218
tempdir_created = false;
1219
perror("mkdtemp");
1220
goto end;
1221
}
1222
1223
if(quit_now){
1224
goto end;
1225
}
1226
1227
if(not init_gpgme(pubkey, seckey, tempdir)){
1228
fprintf(stderr, "init_gpgme failed\n");
1229
exitcode = EXIT_FAILURE;
1230
goto end;
1231
} else {
1232
gpgme_initialized = true;
1233
}
1234
1235
if(quit_now){
1236
goto end;
1237
}
1238
1239
if(connect_to != NULL){
1240
/* Connect directly, do not use Zeroconf */
1241
/* (Mainly meant for debugging) */
1242
char *address = strrchr(connect_to, ':');
1243
if(address == NULL){
1244
fprintf(stderr, "No colon in address\n");
1245
exitcode = EXIT_FAILURE;
1246
goto end;
1247
}
1248
1249
if(quit_now){
1250
goto end;
1251
}
1252
1253
uint16_t port;
1254
errno = 0;
1255
tmpmax = strtoimax(address+1, &tmp, 10);
1256
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1257
or tmpmax != (uint16_t)tmpmax){
1258
fprintf(stderr, "Bad port number\n");
1259
exitcode = EXIT_FAILURE;
1260
goto end;
1261
}
1262
1263
if(quit_now){
1264
goto end;
1265
}
1266
1267
port = (uint16_t)tmpmax;
1268
*address = '\0';
1269
address = connect_to;
1270
/* Colon in address indicates IPv6 */
1271
int af;
1272
if(strchr(address, ':') != NULL){
1273
af = AF_INET6;
1274
} else {
1275
af = AF_INET;
1276
}
1277
1278
if(quit_now){
1279
goto end;
1280
}
1281
1282
ret = start_mandos_communication(address, port, if_index, af);
1283
if(ret < 0){
1284
exitcode = EXIT_FAILURE;
1285
} else {
1286
exitcode = EXIT_SUCCESS;
1287
}
1288
goto end;
1289
}
1290
1291
if(quit_now){
1292
goto end;
1293
}
1294
1295
{
1296
AvahiServerConfig config;
1297
/* Do not publish any local Zeroconf records */
1298
avahi_server_config_init(&config);
1299
config.publish_hinfo = 0;
1300
config.publish_addresses = 0;
1301
config.publish_workstation = 0;
1302
config.publish_domain = 0;
1303
1304
/* Allocate a new server */
1305
mc.server = avahi_server_new(avahi_simple_poll_get
1306
(mc.simple_poll), &config, NULL,
1307
NULL, &error);
1308
1309
/* Free the Avahi configuration data */
1310
avahi_server_config_free(&config);
1311
}
1312
1313
/* Check if creating the Avahi server object succeeded */
1314
if(mc.server == NULL){
1315
fprintf(stderr, "Failed to create Avahi server: %s\n",
1316
avahi_strerror(error));
1317
exitcode = EXIT_FAILURE;
1318
goto end;
1319
}
1320
1321
if(quit_now){
1322
goto end;
1323
}
1324
1325
/* Create the Avahi service browser */
1326
sb = avahi_s_service_browser_new(mc.server, if_index,
1327
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1328
NULL, 0, browse_callback, NULL);
1329
if(sb == NULL){
1330
fprintf(stderr, "Failed to create service browser: %s\n",
1331
avahi_strerror(avahi_server_errno(mc.server)));
1332
exitcode = EXIT_FAILURE;
1333
goto end;
1334
}
1335
1336
if(quit_now){
1337
goto end;
1338
}
1339
1340
/* Run the main loop */
1341
1342
if(debug){
1343
fprintf(stderr, "Starting Avahi loop search\n");
1344
}
1345
1346
avahi_simple_poll_loop(mc.simple_poll);
1347
958
959
uid = getuid();
960
gid = getgid();
961
962
ret = setuid(uid);
963
if(ret == -1){
964
perror("setuid");
965
}
966
967
setgid(gid);
968
if(ret == -1){
969
perror("setgid");
970
}
971
972
ret = init_gnutls_global(&mc, pubkey, seckey);
973
if(ret == -1){
974
fprintf(stderr, "init_gnutls_global failed\n");
975
exitcode = EXIT_FAILURE;
976
goto end;
977
} else {
978
gnutls_initialized = true;
979
}
980
981
if(mkdtemp(tempdir) == NULL){
982
perror("mkdtemp");
983
tempdir[0] = '\0';
984
goto end;
985
}
986
987
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
988
fprintf(stderr, "init_gpgme failed\n");
989
exitcode = EXIT_FAILURE;
990
goto end;
991
} else {
992
gpgme_initialized = true;
993
}
994
995
if_index = (AvahiIfIndex) if_nametoindex(interface);
996
if(if_index == 0){
997
fprintf(stderr, "No such interface: \"%s\"\n", interface);
998
exit(EXIT_FAILURE);
999
}
1000
1001
if(connect_to != NULL){
1002
/* Connect directly, do not use Zeroconf */
1003
/* (Mainly meant for debugging) */
1004
char *address = strrchr(connect_to, ':');
1005
if(address == NULL){
1006
fprintf(stderr, "No colon in address\n");
1007
exitcode = EXIT_FAILURE;
1008
goto end;
1009
}
1010
uint16_t port;
1011
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1012
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1013
or address[numchars+1] != '\0'){
1014
fprintf(stderr, "Bad port number\n");
1015
exitcode = EXIT_FAILURE;
1016
goto end;
1017
}
1018
port = (uint16_t)tmpmax;
1019
*address = '\0';
1020
address = connect_to;
1021
ret = start_mandos_communication(address, port, if_index, &mc);
1022
if(ret < 0){
1023
exitcode = EXIT_FAILURE;
1024
} else {
1025
exitcode = EXIT_SUCCESS;
1026
}
1027
goto end;
1028
}
1029
1030
if(not debug){
1031
avahi_set_log_function(empty_log);
1032
}
1033
1034
/* Initialize the pseudo-RNG for Avahi */
1035
srand((unsigned int) time(NULL));
1036
1037
/* Allocate main Avahi loop object */
1038
mc.simple_poll = avahi_simple_poll_new();
1039
if(mc.simple_poll == NULL) {
1040
fprintf(stderr, "Avahi: Failed to create simple poll"
1041
" object.\n");
1042
exitcode = EXIT_FAILURE;
1043
goto end;
1044
}
1045
1046
{
1047
AvahiServerConfig config;
1048
/* Do not publish any local Zeroconf records */
1049
avahi_server_config_init(&config);
1050
config.publish_hinfo = 0;
1051
config.publish_addresses = 0;
1052
config.publish_workstation = 0;
1053
config.publish_domain = 0;
1054
1055
/* Allocate a new server */
1056
mc.server = avahi_server_new(avahi_simple_poll_get
1057
(mc.simple_poll), &config, NULL,
1058
NULL, &error);
1059
1060
/* Free the Avahi configuration data */
1061
avahi_server_config_free(&config);
1062
}
1063
1064
/* Check if creating the Avahi server object succeeded */
1065
if(mc.server == NULL) {
1066
fprintf(stderr, "Failed to create Avahi server: %s\n",
1067
avahi_strerror(error));
1068
exitcode = EXIT_FAILURE;
1069
goto end;
1070
}
1071
1072
/* Create the Avahi service browser */
1073
sb = avahi_s_service_browser_new(mc.server, if_index,
1074
AVAHI_PROTO_INET6,
1075
"_mandos._tcp", NULL, 0,
1076
browse_callback, &mc);
1077
if(sb == NULL) {
1078
fprintf(stderr, "Failed to create service browser: %s\n",
1079
avahi_strerror(avahi_server_errno(mc.server)));
1080
exitcode = EXIT_FAILURE;
1081
goto end;
1082
}
1083
1084
/* Run the main loop */
1085
1086
if(debug){
1087
fprintf(stderr, "Starting Avahi loop search\n");
1088
}
1089
1090
avahi_simple_poll_loop(mc.simple_poll);
1091
1348
1092
end:
1349
1350
if(debug){
1351
fprintf(stderr, "%s exiting\n", argv[0]);
1352
}
1353
1354
/* Cleanup things */
1355
if(sb != NULL)
1356
avahi_s_service_browser_free(sb);
1357
1358
if(mc.server != NULL)
1359
avahi_server_free(mc.server);
1360
1361
if(mc.simple_poll != NULL)
1362
avahi_simple_poll_free(mc.simple_poll);
1363
1364
if(gnutls_initialized){
1365
gnutls_certificate_free_credentials(mc.cred);
1366
gnutls_global_deinit();
1367
gnutls_dh_params_deinit(mc.dh_params);
1368
}
1369
1370
if(gpgme_initialized){
1371
gpgme_release(mc.ctx);
1372
}
1373
1374
/* Take down the network interface */
1375
if(take_down_interface){
1376
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1377
if(ret == -1){
1378
perror("ioctl SIOCGIFFLAGS");
1379
} else if(network.ifr_flags & IFF_UP) {
1380
network.ifr_flags &= ~IFF_UP; /* clear flag */
1381
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1382
if(ret == -1){
1383
perror("ioctl SIOCSIFFLAGS");
1384
}
1385
}
1386
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1387
if(ret == -1){
1388
perror("close");
1389
}
1390
}
1391
1392
/* Removes the temp directory used by GPGME */
1393
if(tempdir_created){
1394
DIR *d;
1395
struct dirent *direntry;
1396
d = opendir(tempdir);
1397
if(d == NULL){
1398
if(errno != ENOENT){
1399
perror("opendir");
1400
}
1401
} else {
1402
while(true){
1403
direntry = readdir(d);
1404
if(direntry == NULL){
1405
break;
1406
}
1407
/* Skip "." and ".." */
1408
if(direntry->d_name[0] == '.'
1409
and (direntry->d_name[1] == '\0'
1410
or (direntry->d_name[1] == '.'
1411
and direntry->d_name[2] == '\0'))){
1412
continue;
1413
}
1414
char *fullname = NULL;
1415
ret = asprintf(&fullname, "%s/%s", tempdir,
1416
direntry->d_name);
1417
if(ret < 0){
1418
perror("asprintf");
1419
continue;
1420
}
1421
ret = remove(fullname);
1422
if(ret == -1){
1423
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1424
strerror(errno));
1425
}
1426
free(fullname);
1427
}
1428
closedir(d);
1429
}
1430
ret = rmdir(tempdir);
1431
if(ret == -1 and errno != ENOENT){
1432
perror("rmdir");
1433
}
1434
}
1435
1436
if(quit_now){
1437
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1438
if(ret == -1){
1439
perror("sigaction");
1440
}
1441
raise(signal_received);
1442
}
1443
1444
return exitcode;
1093
1094
if(debug){
1095
fprintf(stderr, "%s exiting\n", argv[0]);
1096
}
1097
1098
/* Cleanup things */
1099
if(sb != NULL)
1100
avahi_s_service_browser_free(sb);
1101
1102
if(mc.server != NULL)
1103
avahi_server_free(mc.server);
1104
1105
if(mc.simple_poll != NULL)
1106
avahi_simple_poll_free(mc.simple_poll);
1107
1108
if(gnutls_initialized){
1109
gnutls_certificate_free_credentials(mc.cred);
1110
gnutls_global_deinit();
1111
gnutls_dh_params_deinit(mc.dh_params);
1112
}
1113
1114
if(gpgme_initialized){
1115
gpgme_release(mc.ctx);
1116
}
1117
1118
/* Removes the temp directory used by GPGME */
1119
if(tempdir[0] != '\0'){
1120
DIR *d;
1121
struct dirent *direntry;
1122
d = opendir(tempdir);
1123
if(d == NULL){
1124
if(errno != ENOENT){
1125
perror("opendir");
1126
}
1127
} else {
1128
while(true){
1129
direntry = readdir(d);
1130
if(direntry == NULL){
1131
break;
1132
}
1133
if(direntry->d_type == DT_REG){
1134
char *fullname = NULL;
1135
ret = asprintf(&fullname, "%s/%s", tempdir,
1136
direntry->d_name);
1137
if(ret < 0){
1138
perror("asprintf");
1139
continue;
1140
}
1141
ret = unlink(fullname);
1142
if(ret == -1){
1143
fprintf(stderr, "unlink(\"%s\"): %s",
1144
fullname, strerror(errno));
1145
}
1146
free(fullname);
1147
}
1148
}
1149
closedir(d);
1150
}
1151
ret = rmdir(tempdir);
1152
if(ret == -1 and errno != ENOENT){
1153
perror("rmdir");
1154
}
1155
}
1156
1157
return exitcode;
1445
1158
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0