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- Committer: Teddy Hogeborn
- Date: 2009-01-31 10:33:17 UTC
- mfrom: (24.1.129 mandos)
- Revision ID: teddy@fukt.bsnet.se-20090131103317-wzqvyr532sjcjt7u
Merge from Björn:
* mandos-ctl: New option "--remove-client". Only default to listing
clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
network interface. New option "--delay"
to control the maximum delay to wait for
running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
"--delay".
* mandos-ctl: New option "--remove-client". Only default to listing
clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
network interface. New option "--delay"
to control the maximum delay to wait for
running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
"--delay".
- 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(),
40
remove() */
44
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
44
srand() */
45
#include <stdbool.h> /* bool, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
51
#include <sys/ioctl.h> /* ioctl */
48
#include <sys/ioctl.h> /* ioctl */
52
49
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
53
50
sockaddr_in6, PF_INET6,
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
56
54
#include <sys/stat.h> /* open() */
57
55
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
56
struct in6_addr, inet_pton(),
57
connect() */
59
58
#include <fcntl.h> /* open() */
60
59
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
60
*/
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
64
62
#include <assert.h> /* assert() */
65
63
#include <errno.h> /* perror(), errno */
66
64
#include <time.h> /* nanosleep(), time() */
67
65
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
66
SIOCSIFFLAGS, if_indextoname(),
69
67
if_nametoindex(), IF_NAMESIZE */
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
68
#include <netinet/in.h>
73
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
70
getuid(), getgid(), setuid(),
75
71
setgid() */
76
72
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <iso646.h> /* not, or, and */
73
#include <iso646.h> /* not, and, or */
78
74
#include <argp.h> /* struct argp_option, error_t, struct
79
75
argp_state, struct argp,
80
76
argp_parse(), ARGP_KEY_ARG,
81
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
sigaction(), SIGTERM, sigaction,
84
sig_atomic_t */
85
86
#ifdef __linux__
87
78
#include <sys/klog.h> /* klogctl() */
88
#endif /* __linux__ */
89
79
90
80
/* Avahi */
91
81
/* All Avahi types, constants and functions
137
127
gpgme_ctx_t ctx;
138
128
} mandos_context;
139
129
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
130
/*
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
* bytes. "buffer_capacity" is how much is currently allocated,
131
* Make room in "buffer" for at least BUFFER_SIZE additional bytes.
132
* "buffer_capacity" is how much is currently allocated,
148
133
* "buffer_length" is how much is already used.
149
134
*/
150
size_t incbuffer(char **buffer, size_t buffer_length,
135
size_t adjustbuffer(char **buffer, size_t buffer_length,
151
136
size_t buffer_capacity){
152
137
if(buffer_length + BUFFER_SIZE > buffer_capacity){
153
138
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
162
147
/*
163
148
* Initialize GPGME.
164
149
*/
165
static bool init_gpgme(const char *seckey,
150
static bool init_gpgme(mandos_context *mc, const char *seckey,
166
151
const char *pubkey, const char *tempdir){
167
152
int ret;
168
153
gpgme_error_t rc;
189
174
return false;
190
175
}
191
176
192
rc = gpgme_op_import(mc.ctx, pgp_data);
177
rc = gpgme_op_import(mc->ctx, pgp_data);
193
178
if(rc != GPG_ERR_NO_ERROR){
194
179
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
195
180
gpgme_strsource(rc), gpgme_strerror(rc));
205
190
}
206
191
207
192
if(debug){
208
fprintf(stderr, "Initializing GPGME\n");
193
fprintf(stderr, "Initialize gpgme\n");
209
194
}
210
195
211
196
/* Init GPGME */
238
223
}
239
224
240
225
/* Create new GPGME "context" */
241
rc = gpgme_new(&(mc.ctx));
226
rc = gpgme_new(&(mc->ctx));
242
227
if(rc != GPG_ERR_NO_ERROR){
243
228
fprintf(stderr, "bad gpgme_new: %s: %s\n",
244
229
gpgme_strsource(rc), gpgme_strerror(rc));
256
241
* Decrypt OpenPGP data.
257
242
* Returns -1 on error
258
243
*/
259
static ssize_t pgp_packet_decrypt(const char *cryptotext,
244
static ssize_t pgp_packet_decrypt(const mandos_context *mc,
245
const char *cryptotext,
260
246
size_t crypto_size,
261
247
char **plaintext){
262
248
gpgme_data_t dh_crypto, dh_plain;
289
275
290
276
/* Decrypt data from the cryptotext data buffer to the plaintext
291
277
data buffer */
292
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
278
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
293
279
if(rc != GPG_ERR_NO_ERROR){
294
280
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
295
281
gpgme_strsource(rc), gpgme_strerror(rc));
296
282
plaintext_length = -1;
297
283
if(debug){
298
284
gpgme_decrypt_result_t result;
299
result = gpgme_op_decrypt_result(mc.ctx);
285
result = gpgme_op_decrypt_result(mc->ctx);
300
286
if(result == NULL){
301
287
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
302
288
} else {
309
295
}
310
296
gpgme_recipient_t recipient;
311
297
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;
298
if(recipient){
299
while(recipient != NULL){
300
fprintf(stderr, "Public key algorithm: %s\n",
301
gpgme_pubkey_algo_name(recipient->pubkey_algo));
302
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
303
fprintf(stderr, "Secret key available: %s\n",
304
recipient->status == GPG_ERR_NO_SECKEY
305
? "No" : "Yes");
306
recipient = recipient->next;
307
}
320
308
}
321
309
}
322
310
}
336
324
337
325
*plaintext = NULL;
338
326
while(true){
339
plaintext_capacity = incbuffer(plaintext,
327
plaintext_capacity = adjustbuffer(plaintext,
340
328
(size_t)plaintext_length,
341
329
plaintext_capacity);
342
330
if(plaintext_capacity == 0){
343
perror("incbuffer");
331
perror("adjustbuffer");
344
332
plaintext_length = -1;
345
333
goto decrypt_end;
346
334
}
378
366
return plaintext_length;
379
367
}
380
368
381
static const char * safer_gnutls_strerror(int value){
369
static const char * safer_gnutls_strerror(int value) {
382
370
const char *ret = gnutls_strerror(value); /* Spurious warning from
383
371
-Wunreachable-code */
384
372
if(ret == NULL)
392
380
fprintf(stderr, "GnuTLS: %s", string);
393
381
}
394
382
395
static int init_gnutls_global(const char *pubkeyfilename,
383
static int init_gnutls_global(mandos_context *mc,
384
const char *pubkeyfilename,
396
385
const char *seckeyfilename){
397
386
int ret;
398
387
401
390
}
402
391
403
392
ret = gnutls_global_init();
404
if(ret != GNUTLS_E_SUCCESS){
393
if(ret != GNUTLS_E_SUCCESS) {
405
394
fprintf(stderr, "GnuTLS global_init: %s\n",
406
395
safer_gnutls_strerror(ret));
407
396
return -1;
416
405
}
417
406
418
407
/* OpenPGP credentials */
419
gnutls_certificate_allocate_credentials(&mc.cred);
408
gnutls_certificate_allocate_credentials(&mc->cred);
420
409
if(ret != GNUTLS_E_SUCCESS){
421
410
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
411
* from
412
* -Wunreachable-code
413
*/
425
414
safer_gnutls_strerror(ret));
426
415
gnutls_global_deinit();
427
416
return -1;
434
423
}
435
424
436
425
ret = gnutls_certificate_set_openpgp_key_file
437
(mc.cred, pubkeyfilename, seckeyfilename,
426
(mc->cred, pubkeyfilename, seckeyfilename,
438
427
GNUTLS_OPENPGP_FMT_BASE64);
439
if(ret != GNUTLS_E_SUCCESS){
428
if(ret != GNUTLS_E_SUCCESS) {
440
429
fprintf(stderr,
441
430
"Error[%d] while reading the OpenPGP key pair ('%s',"
442
431
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
446
435
}
447
436
448
437
/* GnuTLS server initialization */
449
ret = gnutls_dh_params_init(&mc.dh_params);
450
if(ret != GNUTLS_E_SUCCESS){
438
ret = gnutls_dh_params_init(&mc->dh_params);
439
if(ret != GNUTLS_E_SUCCESS) {
451
440
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
452
441
" %s\n", safer_gnutls_strerror(ret));
453
442
goto globalfail;
454
443
}
455
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
456
if(ret != GNUTLS_E_SUCCESS){
444
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
445
if(ret != GNUTLS_E_SUCCESS) {
457
446
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
458
447
safer_gnutls_strerror(ret));
459
448
goto globalfail;
460
449
}
461
450
462
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
451
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
463
452
464
453
return 0;
465
454
466
455
globalfail:
467
456
468
gnutls_certificate_free_credentials(mc.cred);
457
gnutls_certificate_free_credentials(mc->cred);
469
458
gnutls_global_deinit();
470
gnutls_dh_params_deinit(mc.dh_params);
459
gnutls_dh_params_deinit(mc->dh_params);
471
460
return -1;
472
461
}
473
462
474
static int init_gnutls_session(gnutls_session_t *session){
463
static int init_gnutls_session(mandos_context *mc,
464
gnutls_session_t *session){
475
465
int ret;
476
466
/* GnuTLS session creation */
477
467
ret = gnutls_init(session, GNUTLS_SERVER);
482
472
483
473
{
484
474
const char *err;
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
486
if(ret != GNUTLS_E_SUCCESS){
475
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
476
if(ret != GNUTLS_E_SUCCESS) {
487
477
fprintf(stderr, "Syntax error at: %s\n", err);
488
478
fprintf(stderr, "GnuTLS error: %s\n",
489
479
safer_gnutls_strerror(ret));
493
483
}
494
484
495
485
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
497
if(ret != GNUTLS_E_SUCCESS){
486
mc->cred);
487
if(ret != GNUTLS_E_SUCCESS) {
498
488
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
489
safer_gnutls_strerror(ret));
500
490
gnutls_deinit(*session);
505
495
gnutls_certificate_server_set_request(*session,
506
496
GNUTLS_CERT_IGNORE);
507
497
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
498
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
509
499
510
500
return 0;
511
501
}
517
507
/* Called when a Mandos server is found */
518
508
static int start_mandos_communication(const char *ip, uint16_t port,
519
509
AvahiIfIndex if_index,
520
int af){
510
mandos_context *mc){
521
511
int ret, tcp_sd;
522
512
ssize_t sret;
523
union {
524
struct sockaddr_in in;
525
struct sockaddr_in6 in6;
526
} to;
513
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
527
514
char *buffer = NULL;
528
515
char *decrypted_buffer;
529
516
size_t buffer_length = 0;
531
518
ssize_t decrypted_buffer_size;
532
519
size_t written;
533
520
int retval = 0;
521
char interface[IF_NAMESIZE];
534
522
gnutls_session_t session;
535
int pf; /* Protocol family */
536
537
switch(af){
538
case AF_INET6:
539
pf = PF_INET6;
540
break;
541
case AF_INET:
542
pf = PF_INET;
543
break;
544
default:
545
fprintf(stderr, "Bad address family: %d\n", af);
546
return -1;
547
}
548
549
ret = init_gnutls_session(&session);
523
524
ret = init_gnutls_session(mc, &session);
550
525
if(ret != 0){
551
526
return -1;
552
527
}
553
528
554
529
if(debug){
555
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
530
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
556
531
"\n", ip, port);
557
532
}
558
533
559
tcp_sd = socket(pf, SOCK_STREAM, 0);
560
if(tcp_sd < 0){
534
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
535
if(tcp_sd < 0) {
561
536
perror("socket");
562
537
return -1;
563
538
}
564
539
540
if(debug){
541
if(if_indextoname((unsigned int)if_index, interface) == NULL){
542
perror("if_indextoname");
543
return -1;
544
}
545
fprintf(stderr, "Binding to interface %s\n", interface);
546
}
547
565
548
memset(&to, 0, sizeof(to));
566
if(af == AF_INET6){
567
to.in6.sin6_family = (sa_family_t)af;
568
ret = inet_pton(af, ip, &to.in6.sin6_addr);
569
} else { /* IPv4 */
570
to.in.sin_family = (sa_family_t)af;
571
ret = inet_pton(af, ip, &to.in.sin_addr);
572
}
549
to.in6.sin6_family = AF_INET6;
550
/* It would be nice to have a way to detect if we were passed an
551
IPv4 address here. Now we assume an IPv6 address. */
552
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
573
553
if(ret < 0 ){
574
554
perror("inet_pton");
575
555
return -1;
578
558
fprintf(stderr, "Bad address: %s\n", ip);
579
559
return -1;
580
560
}
581
if(af == AF_INET6){
582
to.in6.sin6_port = htons(port); /* Spurious warnings from
583
-Wconversion and
584
-Wunreachable-code */
585
586
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
587
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
588
-Wunreachable-code*/
589
if(if_index == AVAHI_IF_UNSPEC){
590
fprintf(stderr, "An IPv6 link-local address is incomplete"
591
" without a network interface\n");
592
return -1;
593
}
594
/* Set the network interface number as scope */
595
to.in6.sin6_scope_id = (uint32_t)if_index;
596
}
597
} else {
598
to.in.sin_port = htons(port); /* Spurious warnings from
561
to.in6.sin6_port = htons(port); /* Spurious warnings from
599
562
-Wconversion and
600
563
-Wunreachable-code */
601
}
564
565
to.in6.sin6_scope_id = (uint32_t)if_index;
602
566
603
567
if(debug){
604
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
605
char interface[IF_NAMESIZE];
606
if(if_indextoname((unsigned int)if_index, interface) == NULL){
607
perror("if_indextoname");
608
} else {
609
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
610
ip, interface, port);
611
}
612
} else {
613
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
614
port);
615
}
616
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
617
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
618
const char *pcret;
619
if(af == AF_INET6){
620
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
621
sizeof(addrstr));
622
} else {
623
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
624
sizeof(addrstr));
625
}
626
if(pcret == NULL){
568
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
569
port);
570
char addrstr[INET6_ADDRSTRLEN] = "";
571
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
572
sizeof(addrstr)) == NULL){
627
573
perror("inet_ntop");
628
574
} else {
629
575
if(strcmp(addrstr, ip) != 0){
632
578
}
633
579
}
634
580
635
if(af == AF_INET6){
636
ret = connect(tcp_sd, &to.in6, sizeof(to));
637
} else {
638
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
639
}
581
ret = connect(tcp_sd, &to.in, sizeof(to));
640
582
if(ret < 0){
641
583
perror("connect");
642
584
return -1;
688
630
/* Read OpenPGP packet that contains the wanted password */
689
631
690
632
if(debug){
691
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
633
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
692
634
ip);
693
635
}
694
636
695
637
while(true){
696
buffer_capacity = incbuffer(&buffer, buffer_length,
638
buffer_capacity = adjustbuffer(&buffer, buffer_length,
697
639
buffer_capacity);
698
640
if(buffer_capacity == 0){
699
perror("incbuffer");
641
perror("adjustbuffer");
700
642
retval = -1;
701
643
goto mandos_end;
702
644
}
741
683
gnutls_bye(session, GNUTLS_SHUT_RDWR);
742
684
743
685
if(buffer_length > 0){
744
decrypted_buffer_size = pgp_packet_decrypt(buffer,
686
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
745
687
buffer_length,
746
688
&decrypted_buffer);
747
689
if(decrypted_buffer_size >= 0){
780
722
return retval;
781
723
}
782
724
783
sig_atomic_t quit_now = 0;
784
785
725
static void resolve_callback(AvahiSServiceResolver *r,
786
726
AvahiIfIndex interface,
787
AvahiProtocol proto,
727
AVAHI_GCC_UNUSED AvahiProtocol protocol,
788
728
AvahiResolverEvent event,
789
729
const char *name,
790
730
const char *type,
795
735
AVAHI_GCC_UNUSED AvahiStringList *txt,
796
736
AVAHI_GCC_UNUSED AvahiLookupResultFlags
797
737
flags,
798
AVAHI_GCC_UNUSED void* userdata){
738
void* userdata) {
739
mandos_context *mc = userdata;
799
740
assert(r);
800
741
801
742
/* Called whenever a service has been resolved successfully or
802
743
timed out */
803
744
804
if(quit_now){
805
return;
806
}
807
808
switch(event){
745
switch(event) {
809
746
default:
810
747
case AVAHI_RESOLVER_FAILURE:
811
748
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
812
749
" of type '%s' in domain '%s': %s\n", name, type, domain,
813
avahi_strerror(avahi_server_errno(mc.server)));
750
avahi_strerror(avahi_server_errno(mc->server)));
814
751
break;
815
752
816
753
case AVAHI_RESOLVER_FOUND:
822
759
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
823
760
ip, (intmax_t)interface, port);
824
761
}
825
int ret = start_mandos_communication(ip, port, interface,
826
avahi_proto_to_af(proto));
762
int ret = start_mandos_communication(ip, port, interface, mc);
827
763
if(ret == 0){
828
avahi_simple_poll_quit(mc.simple_poll);
764
avahi_simple_poll_quit(mc->simple_poll);
829
765
}
830
766
}
831
767
}
832
768
avahi_s_service_resolver_free(r);
833
769
}
834
770
835
static void browse_callback(AvahiSServiceBrowser *b,
836
AvahiIfIndex interface,
837
AvahiProtocol protocol,
838
AvahiBrowserEvent event,
839
const char *name,
840
const char *type,
841
const char *domain,
842
AVAHI_GCC_UNUSED AvahiLookupResultFlags
843
flags,
844
AVAHI_GCC_UNUSED void* userdata){
771
static void browse_callback( AvahiSServiceBrowser *b,
772
AvahiIfIndex interface,
773
AvahiProtocol protocol,
774
AvahiBrowserEvent event,
775
const char *name,
776
const char *type,
777
const char *domain,
778
AVAHI_GCC_UNUSED AvahiLookupResultFlags
779
flags,
780
void* userdata) {
781
mandos_context *mc = userdata;
845
782
assert(b);
846
783
847
784
/* Called whenever a new services becomes available on the LAN or
848
785
is removed from the LAN */
849
786
850
switch(event){
787
switch(event) {
851
788
default:
852
789
case AVAHI_BROWSER_FAILURE:
853
790
854
791
fprintf(stderr, "(Avahi browser) %s\n",
855
avahi_strerror(avahi_server_errno(mc.server)));
856
avahi_simple_poll_quit(mc.simple_poll);
792
avahi_strerror(avahi_server_errno(mc->server)));
793
avahi_simple_poll_quit(mc->simple_poll);
857
794
return;
858
795
859
796
case AVAHI_BROWSER_NEW:
862
799
the callback function is called the Avahi server will free the
863
800
resolver for us. */
864
801
865
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
866
name, type, domain, protocol, 0,
867
resolve_callback, NULL) == NULL)
802
if(!(avahi_s_service_resolver_new(mc->server, interface,
803
protocol, name, type, domain,
804
AVAHI_PROTO_INET6, 0,
805
resolve_callback, mc)))
868
806
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
869
name, avahi_strerror(avahi_server_errno(mc.server)));
807
name, avahi_strerror(avahi_server_errno(mc->server)));
870
808
break;
871
809
872
810
case AVAHI_BROWSER_REMOVE:
881
819
}
882
820
}
883
821
884
/* stop main loop after sigterm has been called */
885
static void handle_sigterm(__attribute__((unused)) int sig){
886
if(quit_now){
887
return;
888
}
889
quit_now = 1;
890
int old_errno = errno;
891
if(mc.simple_poll != NULL){
892
avahi_simple_poll_quit(mc.simple_poll);
893
}
894
errno = old_errno;
895
}
896
897
822
int main(int argc, char *argv[]){
898
AvahiSServiceBrowser *sb = NULL;
899
int error;
900
int ret;
901
intmax_t tmpmax;
902
char *tmp;
903
int exitcode = EXIT_SUCCESS;
904
const char *interface = "eth0";
905
struct ifreq network;
906
int sd = -1;
907
bool take_down_interface = false;
908
uid_t uid;
909
gid_t gid;
910
char *connect_to = NULL;
911
char tempdir[] = "/tmp/mandosXXXXXX";
912
bool tempdir_created = false;
913
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
914
const char *seckey = PATHDIR "/" SECKEY;
915
const char *pubkey = PATHDIR "/" PUBKEY;
916
917
bool gnutls_initialized = false;
918
bool gpgme_initialized = false;
919
float delay = 2.5f;
920
921
struct sigaction old_sigterm_action;
922
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
923
924
{
925
struct argp_option options[] = {
926
{ .name = "debug", .key = 128,
927
.doc = "Debug mode", .group = 3 },
928
{ .name = "connect", .key = 'c',
929
.arg = "ADDRESS:PORT",
930
.doc = "Connect directly to a specific Mandos server",
931
.group = 1 },
932
{ .name = "interface", .key = 'i',
933
.arg = "NAME",
934
.doc = "Network interface that will be used to search for"
935
" Mandos servers",
936
.group = 1 },
937
{ .name = "seckey", .key = 's',
938
.arg = "FILE",
939
.doc = "OpenPGP secret key file base name",
940
.group = 1 },
941
{ .name = "pubkey", .key = 'p',
942
.arg = "FILE",
943
.doc = "OpenPGP public key file base name",
944
.group = 2 },
945
{ .name = "dh-bits", .key = 129,
946
.arg = "BITS",
947
.doc = "Bit length of the prime number used in the"
948
" Diffie-Hellman key exchange",
949
.group = 2 },
950
{ .name = "priority", .key = 130,
951
.arg = "STRING",
952
.doc = "GnuTLS priority string for the TLS handshake",
953
.group = 1 },
954
{ .name = "delay", .key = 131,
955
.arg = "SECONDS",
956
.doc = "Maximum delay to wait for interface startup",
957
.group = 2 },
958
{ .name = NULL }
959
};
960
961
error_t parse_opt(int key, char *arg,
962
struct argp_state *state){
963
switch(key){
964
case 128: /* --debug */
965
debug = true;
966
break;
967
case 'c': /* --connect */
968
connect_to = arg;
969
break;
970
case 'i': /* --interface */
971
interface = arg;
972
break;
973
case 's': /* --seckey */
974
seckey = arg;
975
break;
976
case 'p': /* --pubkey */
977
pubkey = arg;
978
break;
979
case 129: /* --dh-bits */
980
errno = 0;
981
tmpmax = strtoimax(arg, &tmp, 10);
982
if(errno != 0 or tmp == arg or *tmp != '\0'
983
or tmpmax != (typeof(mc.dh_bits))tmpmax){
984
fprintf(stderr, "Bad number of DH bits\n");
985
exit(EXIT_FAILURE);
986
}
987
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
988
break;
989
case 130: /* --priority */
990
mc.priority = arg;
991
break;
992
case 131: /* --delay */
993
errno = 0;
994
delay = strtof(arg, &tmp);
995
if(errno != 0 or tmp == arg or *tmp != '\0'){
996
fprintf(stderr, "Bad delay\n");
997
exit(EXIT_FAILURE);
998
}
999
break;
1000
case ARGP_KEY_ARG:
1001
argp_usage(state);
1002
case ARGP_KEY_END:
1003
break;
1004
default:
1005
return ARGP_ERR_UNKNOWN;
1006
}
1007
return 0;
1008
}
1009
1010
struct argp argp = { .options = options, .parser = parse_opt,
1011
.args_doc = "",
1012
.doc = "Mandos client -- Get and decrypt"
1013
" passwords from a Mandos server" };
1014
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1015
if(ret == ARGP_ERR_UNKNOWN){
1016
fprintf(stderr, "Unknown error while parsing arguments\n");
1017
exitcode = EXIT_FAILURE;
1018
goto end;
1019
}
1020
}
1021
1022
if(not debug){
1023
avahi_set_log_function(empty_log);
1024
}
1025
1026
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1027
from the signal handler */
1028
/* Initialize the pseudo-RNG for Avahi */
1029
srand((unsigned int) time(NULL));
1030
mc.simple_poll = avahi_simple_poll_new();
1031
if(mc.simple_poll == NULL){
1032
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1033
exitcode = EXIT_FAILURE;
1034
goto end;
1035
}
1036
1037
sigemptyset(&sigterm_action.sa_mask);
1038
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1039
if(ret == -1){
1040
perror("sigaddset");
1041
exitcode = EXIT_FAILURE;
1042
goto end;
1043
}
1044
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1045
if(ret == -1){
1046
perror("sigaddset");
1047
exitcode = EXIT_FAILURE;
1048
goto end;
1049
}
1050
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1051
if(ret == -1){
1052
perror("sigaddset");
1053
exitcode = EXIT_FAILURE;
1054
goto end;
1055
}
1056
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1057
if(ret == -1){
1058
perror("sigaction");
1059
exitcode = EXIT_FAILURE;
1060
goto end;
1061
}
1062
1063
/* If the interface is down, bring it up */
1064
if(interface[0] != '\0'){
1065
if_index = (AvahiIfIndex) if_nametoindex(interface);
1066
if(if_index == 0){
1067
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1068
exitcode = EXIT_FAILURE;
1069
goto end;
1070
}
1071
1072
if(quit_now){
1073
goto end;
1074
}
1075
1076
#ifdef __linux__
1077
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1078
messages to mess up the prompt */
1079
ret = klogctl(8, NULL, 5);
1080
bool restore_loglevel = true;
1081
if(ret == -1){
1082
restore_loglevel = false;
1083
perror("klogctl");
1084
}
1085
#endif /* __linux__ */
1086
1087
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1088
if(sd < 0){
1089
perror("socket");
1090
exitcode = EXIT_FAILURE;
1091
#ifdef __linux__
1092
if(restore_loglevel){
1093
ret = klogctl(7, NULL, 0);
1094
if(ret == -1){
1095
perror("klogctl");
1096
}
1097
}
1098
#endif /* __linux__ */
1099
goto end;
1100
}
1101
strcpy(network.ifr_name, interface);
1102
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1103
if(ret == -1){
1104
perror("ioctl SIOCGIFFLAGS");
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
exitcode = EXIT_FAILURE;
1114
goto end;
1115
}
1116
if((network.ifr_flags & IFF_UP) == 0){
1117
network.ifr_flags |= IFF_UP;
1118
take_down_interface = true;
1119
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1120
if(ret == -1){
1121
take_down_interface = false;
1122
perror("ioctl SIOCSIFFLAGS");
1123
exitcode = EXIT_FAILURE;
1124
#ifdef __linux__
1125
if(restore_loglevel){
823
AvahiSServiceBrowser *sb = NULL;
824
int error;
825
int ret;
826
intmax_t tmpmax;
827
int numchars;
828
int exitcode = EXIT_SUCCESS;
829
const char *interface = "eth0";
830
struct ifreq network;
831
int sd;
832
uid_t uid;
833
gid_t gid;
834
char *connect_to = NULL;
835
char tempdir[] = "/tmp/mandosXXXXXX";
836
bool tempdir_created = false;
837
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
838
const char *seckey = PATHDIR "/" SECKEY;
839
const char *pubkey = PATHDIR "/" PUBKEY;
840
841
mandos_context mc = { .simple_poll = NULL, .server = NULL,
842
.dh_bits = 1024, .priority = "SECURE256"
843
":!CTYPE-X.509:+CTYPE-OPENPGP" };
844
bool gnutls_initialized = false;
845
bool gpgme_initialized = false;
846
double delay = 2.5;
847
848
{
849
struct argp_option options[] = {
850
{ .name = "debug", .key = 128,
851
.doc = "Debug mode", .group = 3 },
852
{ .name = "connect", .key = 'c',
853
.arg = "ADDRESS:PORT",
854
.doc = "Connect directly to a specific Mandos server",
855
.group = 1 },
856
{ .name = "interface", .key = 'i',
857
.arg = "NAME",
858
.doc = "Interface that will be used to search for Mandos"
859
" servers",
860
.group = 1 },
861
{ .name = "seckey", .key = 's',
862
.arg = "FILE",
863
.doc = "OpenPGP secret key file base name",
864
.group = 1 },
865
{ .name = "pubkey", .key = 'p',
866
.arg = "FILE",
867
.doc = "OpenPGP public key file base name",
868
.group = 2 },
869
{ .name = "dh-bits", .key = 129,
870
.arg = "BITS",
871
.doc = "Bit length of the prime number used in the"
872
" Diffie-Hellman key exchange",
873
.group = 2 },
874
{ .name = "priority", .key = 130,
875
.arg = "STRING",
876
.doc = "GnuTLS priority string for the TLS handshake",
877
.group = 1 },
878
{ .name = "delay", .key = 131,
879
.arg = "SECONDS",
880
.doc = "Maximum delay to wait for interface startup",
881
.group = 2 },
882
{ .name = NULL }
883
};
884
885
error_t parse_opt(int key, char *arg,
886
struct argp_state *state) {
887
switch(key) {
888
case 128: /* --debug */
889
debug = true;
890
break;
891
case 'c': /* --connect */
892
connect_to = arg;
893
break;
894
case 'i': /* --interface */
895
interface = arg;
896
break;
897
case 's': /* --seckey */
898
seckey = arg;
899
break;
900
case 'p': /* --pubkey */
901
pubkey = arg;
902
break;
903
case 129: /* --dh-bits */
904
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
905
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
906
or arg[numchars] != '\0'){
907
fprintf(stderr, "Bad number of DH bits\n");
908
exit(EXIT_FAILURE);
909
}
910
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
911
break;
912
case 130: /* --priority */
913
mc.priority = arg;
914
break;
915
case 131: /* --delay */
916
ret = sscanf(arg, "%lf%n", &delay, &numchars);
917
if(ret < 1 or arg[numchars] != '\0'){
918
fprintf(stderr, "Bad delay\n");
919
exit(EXIT_FAILURE);
920
}
921
break;
922
case ARGP_KEY_ARG:
923
argp_usage(state);
924
case ARGP_KEY_END:
925
break;
926
default:
927
return ARGP_ERR_UNKNOWN;
928
}
929
return 0;
930
}
931
932
struct argp argp = { .options = options, .parser = parse_opt,
933
.args_doc = "",
934
.doc = "Mandos client -- Get and decrypt"
935
" passwords from a Mandos server" };
936
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
937
if(ret == ARGP_ERR_UNKNOWN){
938
fprintf(stderr, "Unknown error while parsing arguments\n");
939
exitcode = EXIT_FAILURE;
940
goto end;
941
}
942
}
943
944
/* If the interface is down, bring it up */
945
{
946
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
947
messages to mess up the prompt */
948
ret = klogctl(8, NULL, 5);
949
if(ret == -1){
950
perror("klogctl");
951
}
952
953
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
954
if(sd < 0) {
955
perror("socket");
956
exitcode = EXIT_FAILURE;
957
ret = klogctl(7, NULL, 0);
958
if(ret == -1){
959
perror("klogctl");
960
}
961
goto end;
962
}
963
strcpy(network.ifr_name, interface);
964
ret = ioctl(sd, SIOCGIFFLAGS, &network);
965
if(ret == -1){
966
perror("ioctl SIOCGIFFLAGS");
967
ret = klogctl(7, NULL, 0);
968
if(ret == -1){
969
perror("klogctl");
970
}
971
exitcode = EXIT_FAILURE;
972
goto end;
973
}
974
if((network.ifr_flags & IFF_UP) == 0){
975
network.ifr_flags |= IFF_UP;
976
ret = ioctl(sd, SIOCSIFFLAGS, &network);
977
if(ret == -1){
978
perror("ioctl SIOCSIFFLAGS");
979
exitcode = EXIT_FAILURE;
1126
980
ret = klogctl(7, NULL, 0);
1127
981
if(ret == -1){
1128
982
perror("klogctl");
1129
983
}
1130
}
1131
#endif /* __linux__ */
1132
goto end;
1133
}
1134
}
1135
/* sleep checking until interface is running */
1136
for(int i=0; i < delay * 4; i++){
1137
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1138
if(ret == -1){
1139
perror("ioctl SIOCGIFFLAGS");
1140
} else if(network.ifr_flags & IFF_RUNNING){
1141
break;
1142
}
1143
struct timespec sleeptime = { .tv_nsec = 250000000 };
1144
ret = nanosleep(&sleeptime, NULL);
1145
if(ret == -1 and errno != EINTR){
1146
perror("nanosleep");
1147
}
1148
}
1149
if(not take_down_interface){
1150
/* We won't need the socket anymore */
984
goto end;
985
}
986
}
987
/* sleep checking until interface is running */
988
for(int i=0; i < delay * 4; i++){
989
ret = ioctl(sd, SIOCGIFFLAGS, &network);
990
if(ret == -1){
991
perror("ioctl SIOCGIFFLAGS");
992
} else if(network.ifr_flags & IFF_RUNNING){
993
break;
994
}
995
struct timespec sleeptime = { .tv_nsec = 250000000 };
996
nanosleep(&sleeptime, NULL);
997
}
1151
998
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1152
999
if(ret == -1){
1153
1000
perror("close");
1154
1001
}
1155
}
1156
#ifdef __linux__
1157
if(restore_loglevel){
1158
1002
/* Restores kernel loglevel to default */
1159
1003
ret = klogctl(7, NULL, 0);
1160
1004
if(ret == -1){
1161
1005
perror("klogctl");
1162
1006
}
1163
1007
}
1164
#endif /* __linux__ */
1165
}
1166
1167
if(quit_now){
1168
goto end;
1169
}
1170
1171
uid = getuid();
1172
gid = getgid();
1173
1174
errno = 0;
1175
setgid(gid);
1176
if(ret == -1){
1177
perror("setgid");
1178
}
1179
1180
ret = setuid(uid);
1181
if(ret == -1){
1182
perror("setuid");
1183
}
1184
1185
if(quit_now){
1186
goto end;
1187
}
1188
1189
ret = init_gnutls_global(pubkey, seckey);
1190
if(ret == -1){
1191
fprintf(stderr, "init_gnutls_global failed\n");
1192
exitcode = EXIT_FAILURE;
1193
goto end;
1194
} else {
1195
gnutls_initialized = true;
1196
}
1197
1198
if(quit_now){
1199
goto end;
1200
}
1201
1202
tempdir_created = true;
1203
if(mkdtemp(tempdir) == NULL){
1204
tempdir_created = false;
1205
perror("mkdtemp");
1206
goto end;
1207
}
1208
1209
if(quit_now){
1210
goto end;
1211
}
1212
1213
if(not init_gpgme(pubkey, seckey, tempdir)){
1214
fprintf(stderr, "init_gpgme failed\n");
1215
exitcode = EXIT_FAILURE;
1216
goto end;
1217
} else {
1218
gpgme_initialized = true;
1219
}
1220
1221
if(quit_now){
1222
goto end;
1223
}
1224
1225
if(connect_to != NULL){
1226
/* Connect directly, do not use Zeroconf */
1227
/* (Mainly meant for debugging) */
1228
char *address = strrchr(connect_to, ':');
1229
if(address == NULL){
1230
fprintf(stderr, "No colon in address\n");
1231
exitcode = EXIT_FAILURE;
1232
goto end;
1233
}
1234
1235
if(quit_now){
1236
goto end;
1237
}
1238
1239
uint16_t port;
1240
errno = 0;
1241
tmpmax = strtoimax(address+1, &tmp, 10);
1242
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1243
or tmpmax != (uint16_t)tmpmax){
1244
fprintf(stderr, "Bad port number\n");
1245
exitcode = EXIT_FAILURE;
1246
goto end;
1247
}
1248
1249
if(quit_now){
1250
goto end;
1251
}
1252
1253
port = (uint16_t)tmpmax;
1254
*address = '\0';
1255
address = connect_to;
1256
/* Colon in address indicates IPv6 */
1257
int af;
1258
if(strchr(address, ':') != NULL){
1259
af = AF_INET6;
1260
} else {
1261
af = AF_INET;
1262
}
1263
1264
if(quit_now){
1265
goto end;
1266
}
1267
1268
ret = start_mandos_communication(address, port, if_index, af);
1269
if(ret < 0){
1270
exitcode = EXIT_FAILURE;
1271
} else {
1272
exitcode = EXIT_SUCCESS;
1273
}
1274
goto end;
1275
}
1276
1277
if(quit_now){
1278
goto end;
1279
}
1280
1281
{
1282
AvahiServerConfig config;
1283
/* Do not publish any local Zeroconf records */
1284
avahi_server_config_init(&config);
1285
config.publish_hinfo = 0;
1286
config.publish_addresses = 0;
1287
config.publish_workstation = 0;
1288
config.publish_domain = 0;
1289
1290
/* Allocate a new server */
1291
mc.server = avahi_server_new(avahi_simple_poll_get
1292
(mc.simple_poll), &config, NULL,
1293
NULL, &error);
1294
1295
/* Free the Avahi configuration data */
1296
avahi_server_config_free(&config);
1297
}
1298
1299
/* Check if creating the Avahi server object succeeded */
1300
if(mc.server == NULL){
1301
fprintf(stderr, "Failed to create Avahi server: %s\n",
1302
avahi_strerror(error));
1303
exitcode = EXIT_FAILURE;
1304
goto end;
1305
}
1306
1307
if(quit_now){
1308
goto end;
1309
}
1310
1311
/* Create the Avahi service browser */
1312
sb = avahi_s_service_browser_new(mc.server, if_index,
1313
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1314
NULL, 0, browse_callback, NULL);
1315
if(sb == NULL){
1316
fprintf(stderr, "Failed to create service browser: %s\n",
1317
avahi_strerror(avahi_server_errno(mc.server)));
1318
exitcode = EXIT_FAILURE;
1319
goto end;
1320
}
1321
1322
if(quit_now){
1323
goto end;
1324
}
1325
1326
/* Run the main loop */
1327
1328
if(debug){
1329
fprintf(stderr, "Starting Avahi loop search\n");
1330
}
1331
1332
avahi_simple_poll_loop(mc.simple_poll);
1333
1008
1009
uid = getuid();
1010
gid = getgid();
1011
1012
setgid(gid);
1013
if(ret == -1){
1014
perror("setgid");
1015
}
1016
1017
ret = setuid(uid);
1018
if(ret == -1){
1019
perror("setuid");
1020
}
1021
1022
ret = init_gnutls_global(&mc, pubkey, seckey);
1023
if(ret == -1){
1024
fprintf(stderr, "init_gnutls_global failed\n");
1025
exitcode = EXIT_FAILURE;
1026
goto end;
1027
} else {
1028
gnutls_initialized = true;
1029
}
1030
1031
if(mkdtemp(tempdir) == NULL){
1032
perror("mkdtemp");
1033
goto end;
1034
}
1035
tempdir_created = true;
1036
1037
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1038
fprintf(stderr, "init_gpgme failed\n");
1039
exitcode = EXIT_FAILURE;
1040
goto end;
1041
} else {
1042
gpgme_initialized = true;
1043
}
1044
1045
if_index = (AvahiIfIndex) if_nametoindex(interface);
1046
if(if_index == 0){
1047
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1048
exitcode = EXIT_FAILURE;
1049
goto end;
1050
}
1051
1052
if(connect_to != NULL){
1053
/* Connect directly, do not use Zeroconf */
1054
/* (Mainly meant for debugging) */
1055
char *address = strrchr(connect_to, ':');
1056
if(address == NULL){
1057
fprintf(stderr, "No colon in address\n");
1058
exitcode = EXIT_FAILURE;
1059
goto end;
1060
}
1061
uint16_t port;
1062
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1063
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1064
or address[numchars+1] != '\0'){
1065
fprintf(stderr, "Bad port number\n");
1066
exitcode = EXIT_FAILURE;
1067
goto end;
1068
}
1069
port = (uint16_t)tmpmax;
1070
*address = '\0';
1071
address = connect_to;
1072
ret = start_mandos_communication(address, port, if_index, &mc);
1073
if(ret < 0){
1074
exitcode = EXIT_FAILURE;
1075
} else {
1076
exitcode = EXIT_SUCCESS;
1077
}
1078
goto end;
1079
}
1080
1081
if(not debug){
1082
avahi_set_log_function(empty_log);
1083
}
1084
1085
/* Initialize the pseudo-RNG for Avahi */
1086
srand((unsigned int) time(NULL));
1087
1088
/* Allocate main Avahi loop object */
1089
mc.simple_poll = avahi_simple_poll_new();
1090
if(mc.simple_poll == NULL) {
1091
fprintf(stderr, "Avahi: Failed to create simple poll"
1092
" object.\n");
1093
exitcode = EXIT_FAILURE;
1094
goto end;
1095
}
1096
1097
{
1098
AvahiServerConfig config;
1099
/* Do not publish any local Zeroconf records */
1100
avahi_server_config_init(&config);
1101
config.publish_hinfo = 0;
1102
config.publish_addresses = 0;
1103
config.publish_workstation = 0;
1104
config.publish_domain = 0;
1105
1106
/* Allocate a new server */
1107
mc.server = avahi_server_new(avahi_simple_poll_get
1108
(mc.simple_poll), &config, NULL,
1109
NULL, &error);
1110
1111
/* Free the Avahi configuration data */
1112
avahi_server_config_free(&config);
1113
}
1114
1115
/* Check if creating the Avahi server object succeeded */
1116
if(mc.server == NULL) {
1117
fprintf(stderr, "Failed to create Avahi server: %s\n",
1118
avahi_strerror(error));
1119
exitcode = EXIT_FAILURE;
1120
goto end;
1121
}
1122
1123
/* Create the Avahi service browser */
1124
sb = avahi_s_service_browser_new(mc.server, if_index,
1125
AVAHI_PROTO_INET6,
1126
"_mandos._tcp", NULL, 0,
1127
browse_callback, &mc);
1128
if(sb == NULL) {
1129
fprintf(stderr, "Failed to create service browser: %s\n",
1130
avahi_strerror(avahi_server_errno(mc.server)));
1131
exitcode = EXIT_FAILURE;
1132
goto end;
1133
}
1134
1135
/* Run the main loop */
1136
1137
if(debug){
1138
fprintf(stderr, "Starting Avahi loop search\n");
1139
}
1140
1141
avahi_simple_poll_loop(mc.simple_poll);
1142
1334
1143
end:
1335
1336
if(debug){
1337
fprintf(stderr, "%s exiting\n", argv[0]);
1338
}
1339
1340
/* Cleanup things */
1341
if(sb != NULL)
1342
avahi_s_service_browser_free(sb);
1343
1344
if(mc.server != NULL)
1345
avahi_server_free(mc.server);
1346
1347
if(mc.simple_poll != NULL)
1348
avahi_simple_poll_free(mc.simple_poll);
1349
1350
if(gnutls_initialized){
1351
gnutls_certificate_free_credentials(mc.cred);
1352
gnutls_global_deinit();
1353
gnutls_dh_params_deinit(mc.dh_params);
1354
}
1355
1356
if(gpgme_initialized){
1357
gpgme_release(mc.ctx);
1358
}
1359
1360
/* Take down the network interface */
1361
if(take_down_interface){
1362
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1363
if(ret == -1){
1364
perror("ioctl SIOCGIFFLAGS");
1365
} else if(network.ifr_flags & IFF_UP) {
1366
network.ifr_flags &= ~IFF_UP; /* clear flag */
1367
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1368
if(ret == -1){
1369
perror("ioctl SIOCSIFFLAGS");
1370
}
1371
}
1372
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1373
if(ret == -1){
1374
perror("close");
1375
}
1376
}
1377
1378
/* Removes the temp directory used by GPGME */
1379
if(tempdir_created){
1380
DIR *d;
1381
struct dirent *direntry;
1382
d = opendir(tempdir);
1383
if(d == NULL){
1384
if(errno != ENOENT){
1385
perror("opendir");
1386
}
1387
} else {
1388
while(true){
1389
direntry = readdir(d);
1390
if(direntry == NULL){
1391
break;
1392
}
1393
/* Skip "." and ".." */
1394
if(direntry->d_name[0] == '.'
1395
and (direntry->d_name[1] == '\0'
1396
or (direntry->d_name[1] == '.'
1397
and direntry->d_name[2] == '\0'))){
1398
continue;
1399
}
1400
char *fullname = NULL;
1401
ret = asprintf(&fullname, "%s/%s", tempdir,
1402
direntry->d_name);
1403
if(ret < 0){
1404
perror("asprintf");
1405
continue;
1406
}
1407
ret = remove(fullname);
1408
if(ret == -1){
1409
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1410
strerror(errno));
1411
}
1412
free(fullname);
1413
}
1414
closedir(d);
1415
}
1416
ret = rmdir(tempdir);
1417
if(ret == -1 and errno != ENOENT){
1418
perror("rmdir");
1419
}
1420
}
1421
1422
return exitcode;
1144
1145
if(debug){
1146
fprintf(stderr, "%s exiting\n", argv[0]);
1147
}
1148
1149
/* Cleanup things */
1150
if(sb != NULL)
1151
avahi_s_service_browser_free(sb);
1152
1153
if(mc.server != NULL)
1154
avahi_server_free(mc.server);
1155
1156
if(mc.simple_poll != NULL)
1157
avahi_simple_poll_free(mc.simple_poll);
1158
1159
if(gnutls_initialized){
1160
gnutls_certificate_free_credentials(mc.cred);
1161
gnutls_global_deinit();
1162
gnutls_dh_params_deinit(mc.dh_params);
1163
}
1164
1165
if(gpgme_initialized){
1166
gpgme_release(mc.ctx);
1167
}
1168
1169
/* Removes the temp directory used by GPGME */
1170
if(tempdir_created){
1171
DIR *d;
1172
struct dirent *direntry;
1173
d = opendir(tempdir);
1174
if(d == NULL){
1175
if(errno != ENOENT){
1176
perror("opendir");
1177
}
1178
} else {
1179
while(true){
1180
direntry = readdir(d);
1181
if(direntry == NULL){
1182
break;
1183
}
1184
/* Skip "." and ".." */
1185
if(direntry->d_name[0] == '.'
1186
and (direntry->d_name[1] == '\0'
1187
or (direntry->d_name[1] == '.'
1188
and direntry->d_name[2] == '\0'))){
1189
continue;
1190
}
1191
char *fullname = NULL;
1192
ret = asprintf(&fullname, "%s/%s", tempdir,
1193
direntry->d_name);
1194
if(ret < 0){
1195
perror("asprintf");
1196
continue;
1197
}
1198
ret = remove(fullname);
1199
if(ret == -1){
1200
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1201
strerror(errno));
1202
}
1203
free(fullname);
1204
}
1205
closedir(d);
1206
}
1207
ret = rmdir(tempdir);
1208
if(ret == -1 and errno != ENOENT){
1209
perror("rmdir");
1210
}
1211
}
1212
1213
return exitcode;
1423
1214
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0