To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 342
- compare with another revision
- download diff
- download tarball
- view history from revision 342
- Committer: Teddy Hogeborn
- Date: 2009-04-17 08:26:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20090417082617-eltetak5lzjyz55o
* initramfs-tools-hook: Bug fix: Add "--userid" and "--groupid" to
start of "plugin-runner.conf" file instead of
appending, to allow any preexisting options to
override.
* plugin-runner.conf: Improved wording.
start of "plugin-runner.conf" file instead of
appending, to allow any preexisting options to
override.
* plugin-runner.conf: Improved wording.
- 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() */
45
#include <stdbool.h> /* bool, true */
47
srand(), strtof() */
48
#include <stdbool.h> /* bool, false, true */
46
49
#include <string.h> /* memset(), strcmp(), strlen(),
47
50
strerror(), asprintf(), strcpy() */
48
#include <sys/ioctl.h> /* ioctl */
51
#include <sys/ioctl.h> /* ioctl */
49
52
#include <sys/types.h> /* socket(), inet_pton(), sockaddr,
50
53
sockaddr_in6, PF_INET6,
51
SOCK_STREAM, INET6_ADDRSTRLEN,
52
uid_t, gid_t, open(), opendir(),
53
DIR */
54
SOCK_STREAM, uid_t, gid_t, open(),
55
opendir(), DIR */
54
56
#include <sys/stat.h> /* open() */
55
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
56
struct in6_addr, inet_pton(),
57
connect() */
58
inet_pton(), connect() */
58
59
#include <fcntl.h> /* open() */
59
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
60
61
*/
61
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
strtoimax() */
62
64
#include <assert.h> /* assert() */
63
65
#include <errno.h> /* perror(), errno */
64
66
#include <time.h> /* nanosleep(), time() */
65
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
66
68
SIOCSIFFLAGS, if_indextoname(),
67
69
if_nametoindex(), IF_NAMESIZE */
68
#include <netinet/in.h>
70
#include <netinet/in.h> /* IN6_IS_ADDR_LINKLOCAL,
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
*/
69
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
74
getuid(), getgid(), setuid(),
71
75
setgid() */
72
76
#include <arpa/inet.h> /* inet_pton(), htons */
73
#include <iso646.h> /* not, and, or */
77
#include <iso646.h> /* not, or, and */
74
78
#include <argp.h> /* struct argp_option, error_t, struct
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, sigaction,
84
sig_atomic_t */
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));
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 {
382
394
fprintf(stderr, "GnuTLS: %s", string);
383
395
}
384
396
385
static int init_gnutls_global(mandos_context *mc,
386
const char *pubkeyfilename,
397
static int init_gnutls_global(const char *pubkeyfilename,
387
398
const char *seckeyfilename){
388
399
int ret;
389
400
407
418
}
408
419
409
420
/* OpenPGP credentials */
410
gnutls_certificate_allocate_credentials(&mc->cred);
421
gnutls_certificate_allocate_credentials(&mc.cred);
411
422
if(ret != GNUTLS_E_SUCCESS){
412
423
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
413
* from
414
* -Wunreachable-code
415
*/
424
from
425
-Wunreachable-code
426
*/
416
427
safer_gnutls_strerror(ret));
417
428
gnutls_global_deinit();
418
429
return -1;
425
436
}
426
437
427
438
ret = gnutls_certificate_set_openpgp_key_file
428
(mc->cred, pubkeyfilename, seckeyfilename,
439
(mc.cred, pubkeyfilename, seckeyfilename,
429
440
GNUTLS_OPENPGP_FMT_BASE64);
430
441
if(ret != GNUTLS_E_SUCCESS){
431
442
fprintf(stderr,
437
448
}
438
449
439
450
/* GnuTLS server initialization */
440
ret = gnutls_dh_params_init(&mc->dh_params);
451
ret = gnutls_dh_params_init(&mc.dh_params);
441
452
if(ret != GNUTLS_E_SUCCESS){
442
453
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
443
454
" %s\n", safer_gnutls_strerror(ret));
444
455
goto globalfail;
445
456
}
446
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
457
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
447
458
if(ret != GNUTLS_E_SUCCESS){
448
459
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
449
460
safer_gnutls_strerror(ret));
450
461
goto globalfail;
451
462
}
452
463
453
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
464
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
454
465
455
466
return 0;
456
467
457
468
globalfail:
458
469
459
gnutls_certificate_free_credentials(mc->cred);
470
gnutls_certificate_free_credentials(mc.cred);
460
471
gnutls_global_deinit();
461
gnutls_dh_params_deinit(mc->dh_params);
472
gnutls_dh_params_deinit(mc.dh_params);
462
473
return -1;
463
474
}
464
475
465
static int init_gnutls_session(mandos_context *mc,
466
gnutls_session_t *session){
476
static int init_gnutls_session(gnutls_session_t *session){
467
477
int ret;
468
478
/* GnuTLS session creation */
469
479
ret = gnutls_init(session, GNUTLS_SERVER);
474
484
475
485
{
476
486
const char *err;
477
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
487
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
478
488
if(ret != GNUTLS_E_SUCCESS){
479
489
fprintf(stderr, "Syntax error at: %s\n", err);
480
490
fprintf(stderr, "GnuTLS error: %s\n",
485
495
}
486
496
487
497
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
488
mc->cred);
498
mc.cred);
489
499
if(ret != GNUTLS_E_SUCCESS){
490
500
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
491
501
safer_gnutls_strerror(ret));
497
507
gnutls_certificate_server_set_request(*session,
498
508
GNUTLS_CERT_IGNORE);
499
509
500
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
510
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
501
511
502
512
return 0;
503
513
}
509
519
/* Called when a Mandos server is found */
510
520
static int start_mandos_communication(const char *ip, uint16_t port,
511
521
AvahiIfIndex if_index,
512
mandos_context *mc){
522
int af){
513
523
int ret, tcp_sd;
514
524
ssize_t sret;
515
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
525
union {
526
struct sockaddr_in in;
527
struct sockaddr_in6 in6;
528
} to;
516
529
char *buffer = NULL;
517
530
char *decrypted_buffer;
518
531
size_t buffer_length = 0;
520
533
ssize_t decrypted_buffer_size;
521
534
size_t written;
522
535
int retval = 0;
523
char interface[IF_NAMESIZE];
524
536
gnutls_session_t session;
525
526
ret = init_gnutls_session(mc, &session);
537
int pf; /* Protocol family */
538
539
switch(af){
540
case AF_INET6:
541
pf = PF_INET6;
542
break;
543
case AF_INET:
544
pf = PF_INET;
545
break;
546
default:
547
fprintf(stderr, "Bad address family: %d\n", af);
548
return -1;
549
}
550
551
ret = init_gnutls_session(&session);
527
552
if(ret != 0){
528
553
return -1;
529
554
}
530
555
531
556
if(debug){
532
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
557
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
533
558
"\n", ip, port);
534
559
}
535
560
536
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
561
tcp_sd = socket(pf, SOCK_STREAM, 0);
537
562
if(tcp_sd < 0){
538
563
perror("socket");
539
564
return -1;
540
565
}
541
566
542
if(debug){
543
if(if_indextoname((unsigned int)if_index, interface) == NULL){
544
perror("if_indextoname");
545
return -1;
546
}
547
fprintf(stderr, "Binding to interface %s\n", interface);
548
}
549
550
567
memset(&to, 0, sizeof(to));
551
to.in6.sin6_family = AF_INET6;
552
/* It would be nice to have a way to detect if we were passed an
553
IPv4 address here. Now we assume an IPv6 address. */
554
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
568
if(af == AF_INET6){
569
to.in6.sin6_family = (sa_family_t)af;
570
ret = inet_pton(af, ip, &to.in6.sin6_addr);
571
} else { /* IPv4 */
572
to.in.sin_family = (sa_family_t)af;
573
ret = inet_pton(af, ip, &to.in.sin_addr);
574
}
555
575
if(ret < 0 ){
556
576
perror("inet_pton");
557
577
return -1;
560
580
fprintf(stderr, "Bad address: %s\n", ip);
561
581
return -1;
562
582
}
563
to.in6.sin6_port = htons(port); /* Spurious warnings from
583
if(af == AF_INET6){
584
to.in6.sin6_port = htons(port); /* Spurious warnings from
585
-Wconversion and
586
-Wunreachable-code */
587
588
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
589
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
590
-Wunreachable-code*/
591
if(if_index == AVAHI_IF_UNSPEC){
592
fprintf(stderr, "An IPv6 link-local address is incomplete"
593
" without a network interface\n");
594
return -1;
595
}
596
/* Set the network interface number as scope */
597
to.in6.sin6_scope_id = (uint32_t)if_index;
598
}
599
} else {
600
to.in.sin_port = htons(port); /* Spurious warnings from
564
601
-Wconversion and
565
602
-Wunreachable-code */
566
567
to.in6.sin6_scope_id = (uint32_t)if_index;
603
}
568
604
569
605
if(debug){
570
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
571
port);
572
char addrstr[INET6_ADDRSTRLEN] = "";
573
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
574
sizeof(addrstr)) == NULL){
606
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
607
char interface[IF_NAMESIZE];
608
if(if_indextoname((unsigned int)if_index, interface) == NULL){
609
perror("if_indextoname");
610
} else {
611
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
612
ip, interface, port);
613
}
614
} else {
615
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
616
port);
617
}
618
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
619
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
620
const char *pcret;
621
if(af == AF_INET6){
622
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
623
sizeof(addrstr));
624
} else {
625
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
626
sizeof(addrstr));
627
}
628
if(pcret == NULL){
575
629
perror("inet_ntop");
576
630
} else {
577
631
if(strcmp(addrstr, ip) != 0){
580
634
}
581
635
}
582
636
583
ret = connect(tcp_sd, &to.in, sizeof(to));
637
if(af == AF_INET6){
638
ret = connect(tcp_sd, &to.in6, sizeof(to));
639
} else {
640
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
641
}
584
642
if(ret < 0){
585
643
perror("connect");
586
644
return -1;
632
690
/* Read OpenPGP packet that contains the wanted password */
633
691
634
692
if(debug){
635
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
693
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
636
694
ip);
637
695
}
638
696
685
743
gnutls_bye(session, GNUTLS_SHUT_RDWR);
686
744
687
745
if(buffer_length > 0){
688
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
746
decrypted_buffer_size = pgp_packet_decrypt(buffer,
689
747
buffer_length,
690
748
&decrypted_buffer);
691
749
if(decrypted_buffer_size >= 0){
726
784
727
785
static void resolve_callback(AvahiSServiceResolver *r,
728
786
AvahiIfIndex interface,
729
AVAHI_GCC_UNUSED AvahiProtocol protocol,
787
AvahiProtocol proto,
730
788
AvahiResolverEvent event,
731
789
const char *name,
732
790
const char *type,
737
795
AVAHI_GCC_UNUSED AvahiStringList *txt,
738
796
AVAHI_GCC_UNUSED AvahiLookupResultFlags
739
797
flags,
740
void* userdata){
741
mandos_context *mc = userdata;
798
AVAHI_GCC_UNUSED void* userdata){
742
799
assert(r);
743
800
744
801
/* Called whenever a service has been resolved successfully or
749
806
case AVAHI_RESOLVER_FAILURE:
750
807
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
751
808
" of type '%s' in domain '%s': %s\n", name, type, domain,
752
avahi_strerror(avahi_server_errno(mc->server)));
809
avahi_strerror(avahi_server_errno(mc.server)));
753
810
break;
754
811
755
812
case AVAHI_RESOLVER_FOUND:
761
818
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
762
819
ip, (intmax_t)interface, port);
763
820
}
764
int ret = start_mandos_communication(ip, port, interface, mc);
821
int ret = start_mandos_communication(ip, port, interface,
822
avahi_proto_to_af(proto));
765
823
if(ret == 0){
766
avahi_simple_poll_quit(mc->simple_poll);
824
avahi_simple_poll_quit(mc.simple_poll);
767
825
}
768
826
}
769
827
}
779
837
const char *domain,
780
838
AVAHI_GCC_UNUSED AvahiLookupResultFlags
781
839
flags,
782
void* userdata){
783
mandos_context *mc = userdata;
840
AVAHI_GCC_UNUSED void* userdata){
784
841
assert(b);
785
842
786
843
/* Called whenever a new services becomes available on the LAN or
791
848
case AVAHI_BROWSER_FAILURE:
792
849
793
850
fprintf(stderr, "(Avahi browser) %s\n",
794
avahi_strerror(avahi_server_errno(mc->server)));
795
avahi_simple_poll_quit(mc->simple_poll);
851
avahi_strerror(avahi_server_errno(mc.server)));
852
avahi_simple_poll_quit(mc.simple_poll);
796
853
return;
797
854
798
855
case AVAHI_BROWSER_NEW:
801
858
the callback function is called the Avahi server will free the
802
859
resolver for us. */
803
860
804
if(!(avahi_s_service_resolver_new(mc->server, interface,
805
protocol, name, type, domain,
806
AVAHI_PROTO_INET6, 0,
807
resolve_callback, mc)))
861
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
862
name, type, domain, protocol, 0,
863
resolve_callback, NULL) == NULL)
808
864
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
809
name, avahi_strerror(avahi_server_errno(mc->server)));
865
name, avahi_strerror(avahi_server_errno(mc.server)));
810
866
break;
811
867
812
868
case AVAHI_BROWSER_REMOVE:
821
877
}
822
878
}
823
879
880
sig_atomic_t quit_now = 0;
881
882
/* stop main loop after sigterm has been called */
883
static void handle_sigterm(__attribute__((unused)) int sig){
884
if(quit_now){
885
return;
886
}
887
quit_now = 1;
888
int old_errno = errno;
889
if(mc.simple_poll != NULL){
890
avahi_simple_poll_quit(mc.simple_poll);
891
}
892
errno = old_errno;
893
}
894
824
895
int main(int argc, char *argv[]){
825
896
AvahiSServiceBrowser *sb = NULL;
826
897
int error;
827
898
int ret;
828
899
intmax_t tmpmax;
829
int numchars;
900
char *tmp;
830
901
int exitcode = EXIT_SUCCESS;
831
902
const char *interface = "eth0";
832
903
struct ifreq network;
840
911
const char *seckey = PATHDIR "/" SECKEY;
841
912
const char *pubkey = PATHDIR "/" PUBKEY;
842
913
843
mandos_context mc = { .simple_poll = NULL, .server = NULL,
844
.dh_bits = 1024, .priority = "SECURE256"
845
":!CTYPE-X.509:+CTYPE-OPENPGP" };
846
914
bool gnutls_initialized = false;
847
915
bool gpgme_initialized = false;
848
double delay = 2.5;
916
float delay = 2.5f;
917
918
struct sigaction old_sigterm_action;
919
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
849
920
850
921
{
851
922
struct argp_option options[] = {
857
928
.group = 1 },
858
929
{ .name = "interface", .key = 'i',
859
930
.arg = "NAME",
860
.doc = "Interface that will be used to search for Mandos"
861
" servers",
931
.doc = "Network interface that will be used to search for"
932
" Mandos servers",
862
933
.group = 1 },
863
934
{ .name = "seckey", .key = 's',
864
935
.arg = "FILE",
903
974
pubkey = arg;
904
975
break;
905
976
case 129: /* --dh-bits */
906
ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);
907
if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax
908
or arg[numchars] != '\0'){
977
errno = 0;
978
tmpmax = strtoimax(arg, &tmp, 10);
979
if(errno != 0 or tmp == arg or *tmp != '\0'
980
or tmpmax != (typeof(mc.dh_bits))tmpmax){
909
981
fprintf(stderr, "Bad number of DH bits\n");
910
982
exit(EXIT_FAILURE);
911
983
}
915
987
mc.priority = arg;
916
988
break;
917
989
case 131: /* --delay */
918
ret = sscanf(arg, "%lf%n", &delay, &numchars);
919
if(ret < 1 or arg[numchars] != '\0'){
990
errno = 0;
991
delay = strtof(arg, &tmp);
992
if(errno != 0 or tmp == arg or *tmp != '\0'){
920
993
fprintf(stderr, "Bad delay\n");
921
994
exit(EXIT_FAILURE);
922
995
}
943
1016
}
944
1017
}
945
1018
1019
if(not debug){
1020
avahi_set_log_function(empty_log);
1021
}
1022
1023
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1024
from the signal handler */
1025
/* Initialize the pseudo-RNG for Avahi */
1026
srand((unsigned int) time(NULL));
1027
mc.simple_poll = avahi_simple_poll_new();
1028
if(mc.simple_poll == NULL){
1029
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1030
exitcode = EXIT_FAILURE;
1031
goto end;
1032
}
1033
1034
sigemptyset(&sigterm_action.sa_mask);
1035
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1036
if(ret == -1){
1037
perror("sigaddset");
1038
exitcode = EXIT_FAILURE;
1039
goto end;
1040
}
1041
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1042
if(ret == -1){
1043
perror("sigaddset");
1044
exitcode = EXIT_FAILURE;
1045
goto end;
1046
}
1047
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1048
if(ret == -1){
1049
perror("sigaddset");
1050
exitcode = EXIT_FAILURE;
1051
goto end;
1052
}
1053
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1054
if(ret == -1){
1055
perror("sigaction");
1056
exitcode = EXIT_FAILURE;
1057
goto end;
1058
}
1059
946
1060
/* If the interface is down, bring it up */
947
{
1061
if(interface[0] != '\0'){
948
1062
#ifdef __linux__
949
1063
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
950
1064
messages to mess up the prompt */
951
1065
ret = klogctl(8, NULL, 5);
1066
bool restore_loglevel = true;
952
1067
if(ret == -1){
1068
restore_loglevel = false;
953
1069
perror("klogctl");
954
1070
}
955
#endif
1071
#endif /* __linux__ */
956
1072
957
1073
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
958
1074
if(sd < 0){
959
1075
perror("socket");
960
1076
exitcode = EXIT_FAILURE;
961
1077
#ifdef __linux__
962
ret = klogctl(7, NULL, 0);
963
if(ret == -1){
964
perror("klogctl");
1078
if(restore_loglevel){
1079
ret = klogctl(7, NULL, 0);
1080
if(ret == -1){
1081
perror("klogctl");
1082
}
965
1083
}
966
#endif
1084
#endif /* __linux__ */
967
1085
goto end;
968
1086
}
969
1087
strcpy(network.ifr_name, interface);
971
1089
if(ret == -1){
972
1090
perror("ioctl SIOCGIFFLAGS");
973
1091
#ifdef __linux__
974
ret = klogctl(7, NULL, 0);
975
if(ret == -1){
976
perror("klogctl");
1092
if(restore_loglevel){
1093
ret = klogctl(7, NULL, 0);
1094
if(ret == -1){
1095
perror("klogctl");
1096
}
977
1097
}
978
#endif
1098
#endif /* __linux__ */
979
1099
exitcode = EXIT_FAILURE;
980
1100
goto end;
981
1101
}
986
1106
perror("ioctl SIOCSIFFLAGS");
987
1107
exitcode = EXIT_FAILURE;
988
1108
#ifdef __linux__
989
ret = klogctl(7, NULL, 0);
990
if(ret == -1){
991
perror("klogctl");
1109
if(restore_loglevel){
1110
ret = klogctl(7, NULL, 0);
1111
if(ret == -1){
1112
perror("klogctl");
1113
}
992
1114
}
993
#endif
1115
#endif /* __linux__ */
994
1116
goto end;
995
1117
}
996
1118
}
1013
1135
perror("close");
1014
1136
}
1015
1137
#ifdef __linux__
1016
/* Restores kernel loglevel to default */
1017
ret = klogctl(7, NULL, 0);
1018
if(ret == -1){
1019
perror("klogctl");
1138
if(restore_loglevel){
1139
/* Restores kernel loglevel to default */
1140
ret = klogctl(7, NULL, 0);
1141
if(ret == -1){
1142
perror("klogctl");
1143
}
1020
1144
}
1021
#endif
1145
#endif /* __linux__ */
1022
1146
}
1023
1147
1024
1148
uid = getuid();
1025
1149
gid = getgid();
1026
1150
1151
errno = 0;
1027
1152
setgid(gid);
1028
1153
if(ret == -1){
1029
1154
perror("setgid");
1034
1159
perror("setuid");
1035
1160
}
1036
1161
1037
ret = init_gnutls_global(&mc, pubkey, seckey);
1162
ret = init_gnutls_global(pubkey, seckey);
1038
1163
if(ret == -1){
1039
1164
fprintf(stderr, "init_gnutls_global failed\n");
1040
1165
exitcode = EXIT_FAILURE;
1049
1174
}
1050
1175
tempdir_created = true;
1051
1176
1052
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
1177
if(not init_gpgme(pubkey, seckey, tempdir)){
1053
1178
fprintf(stderr, "init_gpgme failed\n");
1054
1179
exitcode = EXIT_FAILURE;
1055
1180
goto end;
1057
1182
gpgme_initialized = true;
1058
1183
}
1059
1184
1060
if_index = (AvahiIfIndex) if_nametoindex(interface);
1061
if(if_index == 0){
1062
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1063
exitcode = EXIT_FAILURE;
1064
goto end;
1185
if(interface[0] != '\0'){
1186
if_index = (AvahiIfIndex) if_nametoindex(interface);
1187
if(if_index == 0){
1188
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1189
exitcode = EXIT_FAILURE;
1190
goto end;
1191
}
1065
1192
}
1066
1193
1067
1194
if(connect_to != NULL){
1074
1201
goto end;
1075
1202
}
1076
1203
uint16_t port;
1077
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1078
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1079
or address[numchars+1] != '\0'){
1204
errno = 0;
1205
tmpmax = strtoimax(address+1, &tmp, 10);
1206
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1207
or tmpmax != (uint16_t)tmpmax){
1080
1208
fprintf(stderr, "Bad port number\n");
1081
1209
exitcode = EXIT_FAILURE;
1082
1210
goto end;
1084
1212
port = (uint16_t)tmpmax;
1085
1213
*address = '\0';
1086
1214
address = connect_to;
1087
ret = start_mandos_communication(address, port, if_index, &mc);
1215
/* Colon in address indicates IPv6 */
1216
int af;
1217
if(strchr(address, ':') != NULL){
1218
af = AF_INET6;
1219
} else {
1220
af = AF_INET;
1221
}
1222
ret = start_mandos_communication(address, port, if_index, af);
1088
1223
if(ret < 0){
1089
1224
exitcode = EXIT_FAILURE;
1090
1225
} else {
1092
1227
}
1093
1228
goto end;
1094
1229
}
1095
1096
if(not debug){
1097
avahi_set_log_function(empty_log);
1098
}
1099
1100
/* Initialize the pseudo-RNG for Avahi */
1101
srand((unsigned int) time(NULL));
1102
1103
/* Allocate main Avahi loop object */
1104
mc.simple_poll = avahi_simple_poll_new();
1105
if(mc.simple_poll == NULL){
1106
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1107
exitcode = EXIT_FAILURE;
1108
goto end;
1109
}
1110
1230
1111
1231
{
1112
1232
AvahiServerConfig config;
1113
1233
/* Do not publish any local Zeroconf records */
1136
1256
1137
1257
/* Create the Avahi service browser */
1138
1258
sb = avahi_s_service_browser_new(mc.server, if_index,
1139
AVAHI_PROTO_INET6, "_mandos._tcp",
1140
NULL, 0, browse_callback, &mc);
1259
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1260
NULL, 0, browse_callback, NULL);
1141
1261
if(sb == NULL){
1142
1262
fprintf(stderr, "Failed to create service browser: %s\n",
1143
1263
avahi_strerror(avahi_server_errno(mc.server)));
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0