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- Committer: Teddy Hogeborn
- Date: 2012-06-16 19:30:08 UTC
- mto: (301.1.1 release) (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 302.
- Revision ID: teddy@recompile.se-20120616193008-2erbfaw5a5y3yay1
* debian/mandos-client.README.Debian: Update documentation for using
multiple interfaces.
multiple interfaces.
- files removed:
- debian/upstream
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect(),
59
getnameinfo() */
58
inet_pton(), connect() */
60
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
92
91
argz_delete(), argz_append(),
93
92
argz_stringify(), argz_add(),
94
93
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
97
94
98
95
#ifdef __linux__
99
96
#include <sys/klog.h> /* klogctl() */
157
154
158
155
/* Used for passing in values through the Avahi callback functions */
159
156
typedef struct {
157
AvahiSimplePoll *simple_poll;
160
158
AvahiServer *server;
161
159
gnutls_certificate_credentials_t cred;
162
160
unsigned int dh_bits;
164
162
const char *priority;
165
163
gpgme_ctx_t ctx;
166
164
server *current_server;
167
char *interfaces;
168
size_t interfaces_size;
169
165
} mandos_context;
170
166
171
/* global so signal handler can reach it*/
172
AvahiSimplePoll *simple_poll;
167
/* global context so signal handler can reach it*/
168
mandos_context mc = { .simple_poll = NULL, .server = NULL,
169
.dh_bits = 1024, .priority = "SECURE256"
170
":!CTYPE-X.509:+CTYPE-OPENPGP",
171
.current_server = NULL };
173
172
174
173
sig_atomic_t quit_now = 0;
175
174
int signal_received = 0;
183
182
perror(print_text);
184
183
}
185
184
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
185
__attribute__((format (gnu_printf, 2, 3)))
187
186
int fprintf_plus(FILE *stream, const char *format, ...){
188
187
va_list ap;
189
188
va_start (ap, format);
190
189
191
190
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
192
191
program_invocation_short_name));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
192
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
194
193
}
195
194
196
195
/*
198
197
* bytes. "buffer_capacity" is how much is currently allocated,
199
198
* "buffer_length" is how much is already used.
200
199
*/
201
__attribute__((nonnull, warn_unused_result))
202
200
size_t incbuffer(char **buffer, size_t buffer_length,
203
201
size_t buffer_capacity){
204
202
if(buffer_length + BUFFER_SIZE > buffer_capacity){
205
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
206
if(new_buf == NULL){
207
int old_errno = errno;
208
free(*buffer);
209
errno = old_errno;
210
*buffer = NULL;
203
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
204
if(buffer == NULL){
211
205
return 0;
212
206
}
213
*buffer = new_buf;
214
207
buffer_capacity += BUFFER_SIZE;
215
208
}
216
209
return buffer_capacity;
217
210
}
218
211
219
212
/* Add server to set of servers to retry periodically */
220
__attribute__((nonnull, warn_unused_result))
221
213
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
222
int af, server **current_server){
214
int af){
223
215
int ret;
224
216
server *new_server = malloc(sizeof(server));
225
217
if(new_server == NULL){
234
226
perror_plus("strdup");
235
227
return false;
236
228
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
242
229
/* Special case of first server */
243
if(*current_server == NULL){
230
if (mc.current_server == NULL){
244
231
new_server->next = new_server;
245
232
new_server->prev = new_server;
246
*current_server = new_server;
233
mc.current_server = new_server;
234
/* Place the new server last in the list */
247
235
} else {
248
/* Place the new server last in the list */
249
new_server->next = *current_server;
250
new_server->prev = (*current_server)->prev;
236
new_server->next = mc.current_server;
237
new_server->prev = mc.current_server->prev;
251
238
new_server->prev->next = new_server;
252
(*current_server)->prev = new_server;
239
mc.current_server->prev = new_server;
240
}
241
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
242
if(ret == -1){
243
perror_plus("clock_gettime");
244
return false;
253
245
}
254
246
return true;
255
247
}
257
249
/*
258
250
* Initialize GPGME.
259
251
*/
260
__attribute__((nonnull, warn_unused_result))
261
static bool init_gpgme(const char * const seckey,
262
const char * const pubkey,
263
const char * const tempdir,
264
mandos_context *mc){
252
static bool init_gpgme(const char *seckey, const char *pubkey,
253
const char *tempdir){
265
254
gpgme_error_t rc;
266
255
gpgme_engine_info_t engine_info;
267
256
257
268
258
/*
269
259
* Helper function to insert pub and seckey to the engine keyring.
270
260
*/
271
bool import_key(const char * const filename){
261
bool import_key(const char *filename){
272
262
int ret;
273
263
int fd;
274
264
gpgme_data_t pgp_data;
286
276
return false;
287
277
}
288
278
289
rc = gpgme_op_import(mc->ctx, pgp_data);
279
rc = gpgme_op_import(mc.ctx, pgp_data);
290
280
if(rc != GPG_ERR_NO_ERROR){
291
281
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
292
282
gpgme_strsource(rc), gpgme_strerror(rc));
336
326
}
337
327
338
328
/* Create new GPGME "context" */
339
rc = gpgme_new(&(mc->ctx));
329
rc = gpgme_new(&(mc.ctx));
340
330
if(rc != GPG_ERR_NO_ERROR){
341
331
fprintf_plus(stderr, "Mandos plugin mandos-client: "
342
332
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
355
345
* Decrypt OpenPGP data.
356
346
* Returns -1 on error
357
347
*/
358
__attribute__((nonnull, warn_unused_result))
359
348
static ssize_t pgp_packet_decrypt(const char *cryptotext,
360
349
size_t crypto_size,
361
char **plaintext,
362
mandos_context *mc){
350
char **plaintext){
363
351
gpgme_data_t dh_crypto, dh_plain;
364
352
gpgme_error_t rc;
365
353
ssize_t ret;
391
379
392
380
/* Decrypt data from the cryptotext data buffer to the plaintext
393
381
data buffer */
394
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
382
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
395
383
if(rc != GPG_ERR_NO_ERROR){
396
384
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
397
385
gpgme_strsource(rc), gpgme_strerror(rc));
398
386
plaintext_length = -1;
399
387
if(debug){
400
388
gpgme_decrypt_result_t result;
401
result = gpgme_op_decrypt_result(mc->ctx);
389
result = gpgme_op_decrypt_result(mc.ctx);
402
390
if(result == NULL){
403
391
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
404
392
} else {
481
469
return plaintext_length;
482
470
}
483
471
484
__attribute__((warn_unused_result))
485
static const char *safer_gnutls_strerror(int value){
472
static const char * safer_gnutls_strerror(int value){
486
473
const char *ret = gnutls_strerror(value);
487
474
if(ret == NULL)
488
475
ret = "(unknown)";
490
477
}
491
478
492
479
/* GnuTLS log function callback */
493
__attribute__((nonnull))
494
480
static void debuggnutls(__attribute__((unused)) int level,
495
481
const char* string){
496
482
fprintf_plus(stderr, "GnuTLS: %s", string);
497
483
}
498
484
499
__attribute__((nonnull, warn_unused_result))
500
485
static int init_gnutls_global(const char *pubkeyfilename,
501
const char *seckeyfilename,
502
mandos_context *mc){
486
const char *seckeyfilename){
503
487
int ret;
504
488
505
489
if(debug){
522
506
}
523
507
524
508
/* OpenPGP credentials */
525
ret = gnutls_certificate_allocate_credentials(&mc->cred);
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
526
510
if(ret != GNUTLS_E_SUCCESS){
527
511
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
528
512
safer_gnutls_strerror(ret));
538
522
}
539
523
540
524
ret = gnutls_certificate_set_openpgp_key_file
541
(mc->cred, pubkeyfilename, seckeyfilename,
525
(mc.cred, pubkeyfilename, seckeyfilename,
542
526
GNUTLS_OPENPGP_FMT_BASE64);
543
527
if(ret != GNUTLS_E_SUCCESS){
544
528
fprintf_plus(stderr,
550
534
}
551
535
552
536
/* GnuTLS server initialization */
553
ret = gnutls_dh_params_init(&mc->dh_params);
537
ret = gnutls_dh_params_init(&mc.dh_params);
554
538
if(ret != GNUTLS_E_SUCCESS){
555
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
556
540
" initialization: %s\n",
557
541
safer_gnutls_strerror(ret));
558
542
goto globalfail;
559
543
}
560
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
561
545
if(ret != GNUTLS_E_SUCCESS){
562
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
563
547
safer_gnutls_strerror(ret));
564
548
goto globalfail;
565
549
}
566
550
567
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
568
552
569
553
return 0;
570
554
571
555
globalfail:
572
556
573
gnutls_certificate_free_credentials(mc->cred);
557
gnutls_certificate_free_credentials(mc.cred);
574
558
gnutls_global_deinit();
575
gnutls_dh_params_deinit(mc->dh_params);
559
gnutls_dh_params_deinit(mc.dh_params);
576
560
return -1;
577
561
}
578
562
579
__attribute__((nonnull, warn_unused_result))
580
static int init_gnutls_session(gnutls_session_t *session,
581
mandos_context *mc){
563
static int init_gnutls_session(gnutls_session_t *session){
582
564
int ret;
583
565
/* GnuTLS session creation */
584
566
do {
596
578
{
597
579
const char *err;
598
580
do {
599
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
581
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
600
582
if(quit_now){
601
583
gnutls_deinit(*session);
602
584
return -1;
613
595
614
596
do {
615
597
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
616
mc->cred);
598
mc.cred);
617
599
if(quit_now){
618
600
gnutls_deinit(*session);
619
601
return -1;
629
611
/* ignore client certificate if any. */
630
612
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
631
613
632
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
614
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
633
615
634
616
return 0;
635
617
}
639
621
__attribute__((unused)) const char *txt){}
640
622
641
623
/* Called when a Mandos server is found */
642
__attribute__((nonnull, warn_unused_result))
643
624
static int start_mandos_communication(const char *ip, in_port_t port,
644
625
AvahiIfIndex if_index,
645
int af, mandos_context *mc){
626
int af){
646
627
int ret, tcp_sd = -1;
647
628
ssize_t sret;
648
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
649
633
char *buffer = NULL;
650
634
char *decrypted_buffer = NULL;
651
635
size_t buffer_length = 0;
675
659
return -1;
676
660
}
677
661
678
/* If the interface is specified and we have a list of interfaces */
679
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
680
/* Check if the interface is one of the interfaces we are using */
681
bool match = false;
682
{
683
char *interface = NULL;
684
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
685
interface))){
686
if(if_nametoindex(interface) == (unsigned int)if_index){
687
match = true;
688
break;
689
}
690
}
691
}
692
if(not match){
693
/* This interface does not match any in the list, so we don't
694
connect to the server */
695
if(debug){
696
char interface[IF_NAMESIZE];
697
if(if_indextoname((unsigned int)if_index, interface) == NULL){
698
perror_plus("if_indextoname");
699
} else {
700
fprintf_plus(stderr, "Skipping server on non-used interface"
701
" \"%s\"\n",
702
if_indextoname((unsigned int)if_index,
703
interface));
704
}
705
}
706
return -1;
707
}
708
}
709
710
ret = init_gnutls_session(&session, mc);
662
ret = init_gnutls_session(&session);
711
663
if(ret != 0){
712
664
return -1;
713
665
}
732
684
733
685
memset(&to, 0, sizeof(to));
734
686
if(af == AF_INET6){
735
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
736
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
687
to.in6.sin6_family = (sa_family_t)af;
688
ret = inet_pton(af, ip, &to.in6.sin6_addr);
737
689
} else { /* IPv4 */
738
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
739
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
690
to.in.sin_family = (sa_family_t)af;
691
ret = inet_pton(af, ip, &to.in.sin_addr);
740
692
}
741
693
if(ret < 0 ){
742
694
int e = errno;
751
703
goto mandos_end;
752
704
}
753
705
if(af == AF_INET6){
754
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
755
if(IN6_IS_ADDR_LINKLOCAL
756
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
706
to.in6.sin6_port = htons(port);
707
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
-Wunreachable-code*/
757
710
if(if_index == AVAHI_IF_UNSPEC){
758
711
fprintf_plus(stderr, "An IPv6 link-local address is"
759
712
" incomplete without a network interface\n");
761
714
goto mandos_end;
762
715
}
763
716
/* Set the network interface number as scope */
764
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
717
to.in6.sin6_scope_id = (uint32_t)if_index;
765
718
}
766
719
} else {
767
((struct sockaddr_in *)&to)->sin_port = htons(port);
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
768
723
}
769
724
770
725
if(quit_now){
787
742
}
788
743
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
789
744
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
790
746
if(af == AF_INET6){
791
ret = getnameinfo((struct sockaddr *)&to,
792
sizeof(struct sockaddr_in6),
793
addrstr, sizeof(addrstr), NULL, 0,
794
NI_NUMERICHOST);
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
795
749
} else {
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
800
752
}
801
if(ret == EAI_SYSTEM){
802
perror_plus("getnameinfo");
803
} else if(ret != 0) {
804
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
805
} else if(strcmp(addrstr, ip) != 0){
806
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
753
if(pcret == NULL){
754
perror_plus("inet_ntop");
755
} else {
756
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
758
}
807
759
}
808
760
}
809
761
813
765
}
814
766
815
767
if(af == AF_INET6){
816
ret = connect(tcp_sd, (struct sockaddr *)&to,
817
sizeof(struct sockaddr_in6));
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
818
769
} else {
819
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
820
sizeof(struct sockaddr_in));
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
821
771
}
822
772
if(ret < 0){
823
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
824
774
int e = errno;
825
775
perror_plus("connect");
826
776
errno = e;
987
937
if(buffer_length > 0){
988
938
ssize_t decrypted_buffer_size;
989
939
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
990
&decrypted_buffer, mc);
940
&decrypted_buffer);
991
941
if(decrypted_buffer_size >= 0){
992
942
993
943
written = 0;
1041
991
return retval;
1042
992
}
1043
993
1044
__attribute__((nonnull))
1045
994
static void resolve_callback(AvahiSServiceResolver *r,
1046
995
AvahiIfIndex interface,
1047
996
AvahiProtocol proto,
1055
1004
AVAHI_GCC_UNUSED AvahiStringList *txt,
1056
1005
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1057
1006
flags,
1058
void *mc){
1007
AVAHI_GCC_UNUSED void* userdata){
1059
1008
if(r == NULL){
1060
1009
return;
1061
1010
}
1073
1022
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1074
1023
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1075
1024
domain,
1076
avahi_strerror(avahi_server_errno
1077
(((mandos_context*)mc)->server)));
1025
avahi_strerror(avahi_server_errno(mc.server)));
1078
1026
break;
1079
1027
1080
1028
case AVAHI_RESOLVER_FOUND:
1088
1036
}
1089
1037
int ret = start_mandos_communication(ip, (in_port_t)port,
1090
1038
interface,
1091
avahi_proto_to_af(proto),
1092
mc);
1039
avahi_proto_to_af(proto));
1093
1040
if(ret == 0){
1094
avahi_simple_poll_quit(simple_poll);
1041
avahi_simple_poll_quit(mc.simple_poll);
1095
1042
} else {
1096
1043
if(not add_server(ip, (in_port_t)port, interface,
1097
avahi_proto_to_af(proto),
1098
&((mandos_context*)mc)->current_server)){
1044
avahi_proto_to_af(proto))){
1099
1045
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1100
1046
" list\n", name);
1101
1047
}
1114
1060
const char *domain,
1115
1061
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1116
1062
flags,
1117
void *mc){
1063
AVAHI_GCC_UNUSED void* userdata){
1118
1064
if(b == NULL){
1119
1065
return;
1120
1066
}
1131
1077
case AVAHI_BROWSER_FAILURE:
1132
1078
1133
1079
fprintf_plus(stderr, "(Avahi browser) %s\n",
1134
avahi_strerror(avahi_server_errno
1135
(((mandos_context*)mc)->server)));
1136
avahi_simple_poll_quit(simple_poll);
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1137
1082
return;
1138
1083
1139
1084
case AVAHI_BROWSER_NEW:
1142
1087
the callback function is called the Avahi server will free the
1143
1088
resolver for us. */
1144
1089
1145
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1146
interface, protocol, name, type,
1147
domain, protocol, 0,
1148
resolve_callback, mc) == NULL)
1090
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
name, type, domain, protocol, 0,
1092
resolve_callback, NULL) == NULL)
1149
1093
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1150
1094
" %s\n", name,
1151
avahi_strerror(avahi_server_errno
1152
(((mandos_context*)mc)->server)));
1095
avahi_strerror(avahi_server_errno(mc.server)));
1153
1096
break;
1154
1097
1155
1098
case AVAHI_BROWSER_REMOVE:
1174
1117
signal_received = sig;
1175
1118
int old_errno = errno;
1176
1119
/* set main loop to exit */
1177
if(simple_poll != NULL){
1178
avahi_simple_poll_quit(simple_poll);
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1179
1122
}
1180
1123
errno = old_errno;
1181
1124
}
1182
1125
1183
__attribute__((nonnull, warn_unused_result))
1184
1126
bool get_flags(const char *ifname, struct ifreq *ifr){
1185
1127
int ret;
1186
1128
error_t ret_errno;
1205
1147
return true;
1206
1148
}
1207
1149
1208
__attribute__((nonnull, warn_unused_result))
1209
1150
bool good_flags(const char *ifname, const struct ifreq *ifr){
1210
1151
1211
1152
/* Reject the loopback device */
1253
1194
* corresponds to an acceptable network device.
1254
1195
* (This function is passed to scandir(3) as a filter function.)
1255
1196
*/
1256
__attribute__((nonnull, warn_unused_result))
1257
1197
int good_interface(const struct dirent *if_entry){
1258
1198
if(if_entry->d_name[0] == '.'){
1259
1199
return 0;
1277
1217
/*
1278
1218
* This function determines if a network interface is up.
1279
1219
*/
1280
__attribute__((nonnull, warn_unused_result))
1281
1220
bool interface_is_up(const char *interface){
1282
1221
struct ifreq ifr;
1283
1222
if(not get_flags(interface, &ifr)){
1294
1233
/*
1295
1234
* This function determines if a network interface is running
1296
1235
*/
1297
__attribute__((nonnull, warn_unused_result))
1298
1236
bool interface_is_running(const char *interface){
1299
1237
struct ifreq ifr;
1300
1238
if(not get_flags(interface, &ifr)){
1308
1246
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1309
1247
}
1310
1248
1311
__attribute__((nonnull, pure, warn_unused_result))
1312
1249
int notdotentries(const struct dirent *direntry){
1313
1250
/* Skip "." and ".." */
1314
1251
if(direntry->d_name[0] == '.'
1321
1258
}
1322
1259
1323
1260
/* Is this directory entry a runnable program? */
1324
__attribute__((nonnull, warn_unused_result))
1325
1261
int runnable_hook(const struct dirent *direntry){
1326
1262
int ret;
1327
1263
size_t sret;
1382
1318
return 1;
1383
1319
}
1384
1320
1385
__attribute__((nonnull, warn_unused_result))
1386
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1387
mandos_context *mc){
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1388
1322
int ret;
1389
1323
struct timespec now;
1390
1324
struct timespec waited_time;
1391
1325
intmax_t block_time;
1392
1326
1393
1327
while(true){
1394
if(mc->current_server == NULL){
1395
if(debug){
1328
if(mc.current_server == NULL){
1329
if (debug){
1396
1330
fprintf_plus(stderr, "Wait until first server is found."
1397
1331
" No timeout!\n");
1398
1332
}
1399
1333
ret = avahi_simple_poll_iterate(s, -1);
1400
1334
} else {
1401
if(debug){
1335
if (debug){
1402
1336
fprintf_plus(stderr, "Check current_server if we should run"
1403
1337
" it, or wait\n");
1404
1338
}
1411
1345
/* Calculating in ms how long time between now and server
1412
1346
who we visted longest time ago. Now - last seen. */
1413
1347
waited_time.tv_sec = (now.tv_sec
1414
- mc->current_server->last_seen.tv_sec);
1348
- mc.current_server->last_seen.tv_sec);
1415
1349
waited_time.tv_nsec = (now.tv_nsec
1416
- mc->current_server->last_seen.tv_nsec);
1350
- mc.current_server->last_seen.tv_nsec);
1417
1351
/* total time is 10s/10,000ms.
1418
1352
Converting to s from ms by dividing by 1,000,
1419
1353
and ns to ms by dividing by 1,000,000. */
1421
1355
- ((intmax_t)waited_time.tv_sec * 1000))
1422
1356
- ((intmax_t)waited_time.tv_nsec / 1000000));
1423
1357
1424
if(debug){
1358
if (debug){
1425
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1426
1360
block_time);
1427
1361
}
1428
1362
1429
1363
if(block_time <= 0){
1430
ret = start_mandos_communication(mc->current_server->ip,
1431
mc->current_server->port,
1432
mc->current_server->if_index,
1433
mc->current_server->af, mc);
1364
ret = start_mandos_communication(mc.current_server->ip,
1365
mc.current_server->port,
1366
mc.current_server->if_index,
1367
mc.current_server->af);
1434
1368
if(ret == 0){
1435
avahi_simple_poll_quit(s);
1369
avahi_simple_poll_quit(mc.simple_poll);
1436
1370
return 0;
1437
1371
}
1438
1372
ret = clock_gettime(CLOCK_MONOTONIC,
1439
&mc->current_server->last_seen);
1373
&mc.current_server->last_seen);
1440
1374
if(ret == -1){
1441
1375
perror_plus("clock_gettime");
1442
1376
return -1;
1443
1377
}
1444
mc->current_server = mc->current_server->next;
1378
mc.current_server = mc.current_server->next;
1445
1379
block_time = 0; /* Call avahi to find new Mandos
1446
1380
servers, but don't block */
1447
1381
}
1449
1383
ret = avahi_simple_poll_iterate(s, (int)block_time);
1450
1384
}
1451
1385
if(ret != 0){
1452
if(ret > 0 or errno != EINTR){
1386
if (ret > 0 or errno != EINTR){
1453
1387
return (ret != 1) ? ret : 0;
1454
1388
}
1455
1389
}
1457
1391
}
1458
1392
1459
1393
/* Set effective uid to 0, return errno */
1460
__attribute__((warn_unused_result))
1461
1394
error_t raise_privileges(void){
1462
1395
error_t old_errno = errno;
1463
1396
error_t ret_errno = 0;
1470
1403
}
1471
1404
1472
1405
/* Set effective and real user ID to 0. Return errno. */
1473
__attribute__((warn_unused_result))
1474
1406
error_t raise_privileges_permanently(void){
1475
1407
error_t old_errno = errno;
1476
1408
error_t ret_errno = raise_privileges();
1487
1419
}
1488
1420
1489
1421
/* Set effective user ID to unprivileged saved user ID */
1490
__attribute__((warn_unused_result))
1491
1422
error_t lower_privileges(void){
1492
1423
error_t old_errno = errno;
1493
1424
error_t ret_errno = 0;
1500
1431
}
1501
1432
1502
1433
/* Lower privileges permanently */
1503
__attribute__((warn_unused_result))
1504
1434
error_t lower_privileges_permanently(void){
1505
1435
error_t old_errno = errno;
1506
1436
error_t ret_errno = 0;
1512
1442
return ret_errno;
1513
1443
}
1514
1444
1515
__attribute__((nonnull))
1516
void run_network_hooks(const char *mode, const char *interface,
1445
bool run_network_hooks(const char *mode, const char *interface,
1517
1446
const float delay){
1518
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1449
int ret;
1519
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1520
1451
alphasort);
1521
1452
if(numhooks == -1){
1528
1459
perror_plus("scandir");
1529
1460
}
1530
1461
} else {
1531
struct dirent *direntry;
1532
int ret;
1533
1462
int devnull = open("/dev/null", O_RDONLY);
1534
1463
for(int i = 0; i < numhooks; i++){
1535
1464
direntry = direntries[i];
1547
1476
if(hook_pid == 0){
1548
1477
/* Child */
1549
1478
/* Raise privileges */
1550
if(raise_privileges_permanently() != 0){
1551
perror_plus("Failed to raise privileges");
1552
_exit(EX_NOPERM);
1553
}
1479
raise_privileges_permanently();
1554
1480
/* Set group */
1555
1481
errno = 0;
1556
1482
ret = setgid(0);
1557
1483
if(ret == -1){
1558
1484
perror_plus("setgid");
1559
_exit(EX_NOPERM);
1560
1485
}
1561
1486
/* Reset supplementary groups */
1562
1487
errno = 0;
1563
1488
ret = setgroups(0, NULL);
1564
1489
if(ret == -1){
1565
1490
perror_plus("setgroups");
1566
_exit(EX_NOPERM);
1567
}
1568
ret = dup2(devnull, STDIN_FILENO);
1569
if(ret == -1){
1570
perror_plus("dup2(devnull, STDIN_FILENO)");
1571
_exit(EX_OSERR);
1572
}
1573
ret = close(devnull);
1574
if(ret == -1){
1575
perror_plus("close");
1576
_exit(EX_OSERR);
1577
}
1578
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1579
if(ret == -1){
1580
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1581
_exit(EX_OSERR);
1582
}
1491
}
1492
dup2(devnull, STDIN_FILENO);
1493
close(devnull);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1583
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1584
1496
if(ret == -1){
1585
1497
perror_plus("setenv");
1601
1513
_exit(EX_OSERR);
1602
1514
}
1603
1515
char *delaystring;
1604
ret = asprintf(&delaystring, "%f", (double)delay);
1516
ret = asprintf(&delaystring, "%f", delay);
1605
1517
if(ret == -1){
1606
1518
perror_plus("asprintf");
1607
1519
_exit(EX_OSERR);
1660
1572
}
1661
1573
close(devnull);
1662
1574
}
1575
return true;
1663
1576
}
1664
1577
1665
__attribute__((nonnull, warn_unused_result))
1666
1578
error_t bring_up_interface(const char *const interface,
1667
1579
const float delay){
1580
int sd = -1;
1668
1581
error_t old_errno = errno;
1669
int ret;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1670
1584
struct ifreq network;
1671
1585
unsigned int if_index = if_nametoindex(interface);
1672
1586
if(if_index == 0){
1681
1595
}
1682
1596
1683
1597
if(not interface_is_up(interface)){
1684
error_t ret_errno = 0, ioctl_errno = 0;
1685
if(not get_flags(interface, &network)){
1598
if(not get_flags(interface, &network) and debug){
1686
1599
ret_errno = errno;
1687
1600
fprintf_plus(stderr, "Failed to get flags for interface "
1688
1601
"\"%s\"\n", interface);
1689
errno = old_errno;
1690
1602
return ret_errno;
1691
1603
}
1692
network.ifr_flags |= IFF_UP; /* set flag */
1604
network.ifr_flags |= IFF_UP;
1693
1605
1694
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1695
if(sd == -1){
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1696
1608
ret_errno = errno;
1697
1609
perror_plus("socket");
1698
1610
errno = old_errno;
1699
1611
return ret_errno;
1700
1612
}
1701
1613
1702
1614
if(quit_now){
1703
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1704
if(ret == -1){
1705
perror_plus("close");
1706
}
1615
close(sd);
1707
1616
errno = old_errno;
1708
1617
return EINTR;
1709
1618
}
1713
1622
interface);
1714
1623
}
1715
1624
1716
/* Raise privileges */
1717
ret_errno = raise_privileges();
1718
if(ret_errno != 0){
1719
perror_plus("Failed to raise privileges");
1720
}
1625
/* Raise priviliges */
1626
raise_privileges();
1721
1627
1722
1628
#ifdef __linux__
1723
int ret_linux;
1724
bool restore_loglevel = false;
1725
if(ret_errno == 0){
1726
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1727
messages about the network interface to mess up the prompt */
1728
ret_linux = klogctl(8, NULL, 5);
1729
if(ret_linux == -1){
1730
perror_plus("klogctl");
1731
} else {
1732
restore_loglevel = true;
1733
}
1629
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1630
messages about the network interface to mess up the prompt */
1631
int ret_linux = klogctl(8, NULL, 5);
1632
bool restore_loglevel = true;
1633
if(ret_linux == -1){
1634
restore_loglevel = false;
1635
perror_plus("klogctl");
1734
1636
}
1735
1637
#endif /* __linux__ */
1736
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1737
ioctl_errno = errno;
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1738
1640
#ifdef __linux__
1739
1641
if(restore_loglevel){
1740
1642
ret_linux = klogctl(7, NULL, 0);
1744
1646
}
1745
1647
#endif /* __linux__ */
1746
1648
1747
/* If raise_privileges() succeeded above */
1748
if(ret_errno == 0){
1749
/* Lower privileges */
1750
ret_errno = lower_privileges();
1751
if(ret_errno != 0){
1752
errno = ret_errno;
1753
perror_plus("Failed to lower privileges");
1754
}
1755
}
1649
/* Lower privileges */
1650
lower_privileges();
1756
1651
1757
1652
/* Close the socket */
1758
1653
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1761
1656
}
1762
1657
1763
1658
if(ret_setflags == -1){
1764
errno = ioctl_errno;
1659
errno = ret_errno;
1765
1660
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1766
1661
errno = old_errno;
1767
return ioctl_errno;
1662
return ret_errno;
1768
1663
}
1769
1664
} else if(debug){
1770
1665
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1788
1683
return 0;
1789
1684
}
1790
1685
1791
__attribute__((nonnull, warn_unused_result))
1792
1686
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1793
1688
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1794
1691
struct ifreq network;
1795
1692
unsigned int if_index = if_nametoindex(interface);
1796
1693
if(if_index == 0){
1799
1696
return ENXIO;
1800
1697
}
1801
1698
if(interface_is_up(interface)){
1802
error_t ret_errno = 0, ioctl_errno = 0;
1803
1699
if(not get_flags(interface, &network) and debug){
1804
1700
ret_errno = errno;
1805
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1806
1702
"\"%s\"\n", interface);
1807
errno = old_errno;
1808
1703
return ret_errno;
1809
1704
}
1810
1705
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1811
1706
1812
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1813
if(sd == -1){
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1814
1709
ret_errno = errno;
1815
1710
perror_plus("socket");
1816
1711
errno = old_errno;
1822
1717
interface);
1823
1718
}
1824
1719
1825
/* Raise privileges */
1826
ret_errno = raise_privileges();
1827
if(ret_errno != 0){
1828
perror_plus("Failed to raise privileges");
1829
}
1830
1831
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1832
ioctl_errno = errno;
1833
1834
/* If raise_privileges() succeeded above */
1835
if(ret_errno == 0){
1836
/* Lower privileges */
1837
ret_errno = lower_privileges();
1838
if(ret_errno != 0){
1839
errno = ret_errno;
1840
perror_plus("Failed to lower privileges");
1841
}
1842
}
1720
/* Raise priviliges */
1721
raise_privileges();
1722
1723
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1724
ret_errno = errno;
1725
1726
/* Lower privileges */
1727
lower_privileges();
1843
1728
1844
1729
/* Close the socket */
1845
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1846
1731
if(ret == -1){
1847
1732
perror_plus("close");
1848
1733
}
1849
1734
1850
1735
if(ret_setflags == -1){
1851
errno = ioctl_errno;
1736
errno = ret_errno;
1852
1737
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1853
1738
errno = old_errno;
1854
return ioctl_errno;
1739
return ret_errno;
1855
1740
}
1856
1741
} else if(debug){
1857
1742
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1863
1748
}
1864
1749
1865
1750
int main(int argc, char *argv[]){
1866
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1867
.priority = "SECURE256:!CTYPE-X.509:"
1868
"+CTYPE-OPENPGP", .current_server = NULL,
1869
.interfaces = NULL, .interfaces_size = 0 };
1870
1751
AvahiSServiceBrowser *sb = NULL;
1871
1752
error_t ret_errno;
1872
1753
int ret;
1873
1754
intmax_t tmpmax;
1874
1755
char *tmp;
1875
1756
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1876
1759
char *interfaces_to_take_down = NULL;
1877
1760
size_t interfaces_to_take_down_size = 0;
1878
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1879
char old_tempdir[] = "/tmp/mandosXXXXXX";
1880
char *tempdir = NULL;
1761
char tempdir[] = "/tmp/mandosXXXXXX";
1762
bool tempdir_created = false;
1881
1763
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1882
1764
const char *seckey = PATHDIR "/" SECKEY;
1883
1765
const char *pubkey = PATHDIR "/" PUBKEY;
1884
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1885
1768
1886
1769
bool gnutls_initialized = false;
1887
1770
bool gpgme_initialized = false;
1978
1861
connect_to = arg;
1979
1862
break;
1980
1863
case 'i': /* --interface */
1981
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1982
arg, (int)',');
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
1983
1866
if(ret_errno != 0){
1984
1867
argp_error(state, "%s", strerror(ret_errno));
1985
1868
}
2065
1948
/* Work around Debian bug #633582:
2066
1949
<http://bugs.debian.org/633582> */
2067
1950
2068
/* Re-raise privileges */
2069
ret_errno = raise_privileges();
2070
if(ret_errno != 0){
2071
errno = ret_errno;
2072
perror_plus("Failed to raise privileges");
2073
} else {
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
2074
1953
struct stat st;
2075
1954
2076
1955
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2116
1995
}
2117
1996
2118
1997
/* Lower privileges */
2119
ret_errno = lower_privileges();
2120
if(ret_errno != 0){
2121
errno = ret_errno;
2122
perror_plus("Failed to lower privileges");
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2123
2002
}
2124
2003
}
2125
2004
}
2126
2005
2127
/* Remove invalid interface names (except "none") */
2006
/* Remove empty interface names */
2128
2007
{
2129
2008
char *interface = NULL;
2130
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2009
while((interface = argz_next(interfaces, interfaces_size,
2131
2010
interface))){
2132
if(strcmp(interface, "none") != 0
2133
and if_nametoindex(interface) == 0){
2134
if(interface[0] != '\0'){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2135
2013
fprintf_plus(stderr, "Not using nonexisting interface"
2136
2014
" \"%s\"\n", interface);
2137
2015
}
2138
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2016
argz_delete(&interfaces, &interfaces_size, interface);
2139
2017
interface = NULL;
2140
2018
}
2141
2019
}
2143
2021
2144
2022
/* Run network hooks */
2145
2023
{
2146
if(mc.interfaces != NULL){
2147
interfaces_hooks = malloc(mc.interfaces_size);
2024
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2148
2027
if(interfaces_hooks == NULL){
2149
2028
perror_plus("malloc");
2150
2029
goto end;
2151
2030
}
2152
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2153
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2154
}
2155
run_network_hooks("start", interfaces_hooks != NULL ?
2156
interfaces_hooks : "", delay);
2031
memcpy(interfaces_hooks, interfaces, interfaces_size);
2032
interfaces_hooks_size = interfaces_size;
2033
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2034
(int)',');
2035
}
2036
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2037
interfaces_hooks : "", delay)){
2038
goto end;
2039
}
2157
2040
}
2158
2041
2159
2042
if(not debug){
2164
2047
from the signal handler */
2165
2048
/* Initialize the pseudo-RNG for Avahi */
2166
2049
srand((unsigned int) time(NULL));
2167
simple_poll = avahi_simple_poll_new();
2168
if(simple_poll == NULL){
2050
mc.simple_poll = avahi_simple_poll_new();
2051
if(mc.simple_poll == NULL){
2169
2052
fprintf_plus(stderr,
2170
2053
"Avahi: Failed to create simple poll object.\n");
2171
2054
exitcode = EX_UNAVAILABLE;
2236
2119
}
2237
2120
2238
2121
/* If no interfaces were specified, make a list */
2239
if(mc.interfaces == NULL){
2122
if(interfaces == NULL){
2240
2123
struct dirent **direntries;
2241
2124
/* Look for any good interfaces */
2242
2125
ret = scandir(sys_class_net, &direntries, good_interface,
2244
2127
if(ret >= 1){
2245
2128
/* Add all found interfaces to interfaces list */
2246
2129
for(int i = 0; i < ret; ++i){
2247
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2248
2131
direntries[i]->d_name);
2249
2132
if(ret_errno != 0){
2250
errno = ret_errno;
2251
2133
perror_plus("argz_add");
2252
2134
continue;
2253
2135
}
2265
2147
}
2266
2148
}
2267
2149
2268
/* Bring up interfaces which are down, and remove any "none"s */
2269
{
2150
/* If we only got one interface, explicitly use only that one */
2151
if(argz_count(interfaces, interfaces_size) == 1){
2152
if(debug){
2153
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2154
interfaces);
2155
}
2156
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2157
}
2158
2159
/* Bring up interfaces which are down */
2160
if(not (argz_count(interfaces, interfaces_size) == 1
2161
and strcmp(interfaces, "none") == 0)){
2270
2162
char *interface = NULL;
2271
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2163
while((interface = argz_next(interfaces, interfaces_size,
2272
2164
interface))){
2273
/* If interface name is "none", stop bringing up interfaces.
2274
Also remove all instances of "none" from the list */
2275
if(strcmp(interface, "none") == 0){
2276
argz_delete(&mc.interfaces, &mc.interfaces_size,
2277
interface);
2278
interface = NULL;
2279
while((interface = argz_next(mc.interfaces,
2280
mc.interfaces_size, interface))){
2281
if(strcmp(interface, "none") == 0){
2282
argz_delete(&mc.interfaces, &mc.interfaces_size,
2283
interface);
2284
interface = NULL;
2285
}
2286
}
2287
break;
2288
}
2289
2165
bool interface_was_up = interface_is_up(interface);
2290
errno = bring_up_interface(interface, delay);
2166
ret = bring_up_interface(interface, delay);
2291
2167
if(not interface_was_up){
2292
if(errno != 0){
2168
if(ret != 0){
2169
errno = ret;
2293
2170
perror_plus("Failed to bring up interface");
2294
2171
} else {
2295
errno = argz_add(&interfaces_to_take_down,
2296
&interfaces_to_take_down_size,
2297
interface);
2298
if(errno != 0){
2299
perror_plus("argz_add");
2300
}
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2174
interface);
2301
2175
}
2302
2176
}
2303
2177
}
2178
free(interfaces);
2179
interfaces = NULL;
2180
interfaces_size = 0;
2304
2181
if(debug and (interfaces_to_take_down == NULL)){
2305
2182
fprintf_plus(stderr, "No interfaces were brought up\n");
2306
2183
}
2307
2184
}
2308
2185
2309
/* If we only got one interface, explicitly use only that one */
2310
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2311
if(debug){
2312
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2313
mc.interfaces);
2314
}
2315
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2316
}
2317
2318
2186
if(quit_now){
2319
2187
goto end;
2320
2188
}
2321
2189
2322
ret = init_gnutls_global(pubkey, seckey, &mc);
2190
ret = init_gnutls_global(pubkey, seckey);
2323
2191
if(ret == -1){
2324
2192
fprintf_plus(stderr, "init_gnutls_global failed\n");
2325
2193
exitcode = EX_UNAVAILABLE;
2332
2200
goto end;
2333
2201
}
2334
2202
2335
/* Try /run/tmp before /tmp */
2336
tempdir = mkdtemp(run_tempdir);
2337
if(tempdir == NULL and errno == ENOENT){
2338
if(debug){
2339
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2340
run_tempdir, old_tempdir);
2341
}
2342
tempdir = mkdtemp(old_tempdir);
2343
}
2344
if(tempdir == NULL){
2203
if(mkdtemp(tempdir) == NULL){
2345
2204
perror_plus("mkdtemp");
2346
2205
goto end;
2347
2206
}
2207
tempdir_created = true;
2348
2208
2349
2209
if(quit_now){
2350
2210
goto end;
2351
2211
}
2352
2212
2353
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2213
if(not init_gpgme(pubkey, seckey, tempdir)){
2354
2214
fprintf_plus(stderr, "init_gpgme failed\n");
2355
2215
exitcode = EX_UNAVAILABLE;
2356
2216
goto end;
2386
2246
exitcode = EX_USAGE;
2387
2247
goto end;
2388
2248
}
2389
2249
2390
2250
if(quit_now){
2391
2251
goto end;
2392
2252
}
2413
2273
}
2414
2274
2415
2275
while(not quit_now){
2416
ret = start_mandos_communication(address, port, if_index, af,
2417
&mc);
2276
ret = start_mandos_communication(address, port, if_index, af);
2418
2277
if(quit_now or ret == 0){
2419
2278
break;
2420
2279
}
2422
2281
fprintf_plus(stderr, "Retrying in %d seconds\n",
2423
2282
(int)retry_interval);
2424
2283
}
2425
sleep((unsigned int)retry_interval);
2284
sleep((int)retry_interval);
2426
2285
}
2427
2286
2428
if(not quit_now){
2287
if (not quit_now){
2429
2288
exitcode = EXIT_SUCCESS;
2430
2289
}
2431
2290
2446
2305
config.publish_domain = 0;
2447
2306
2448
2307
/* Allocate a new server */
2449
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2450
&config, NULL, NULL, &ret_errno);
2308
mc.server = avahi_server_new(avahi_simple_poll_get
2309
(mc.simple_poll), &config, NULL,
2310
NULL, &ret_errno);
2451
2311
2452
2312
/* Free the Avahi configuration data */
2453
2313
avahi_server_config_free(&config);
2468
2328
/* Create the Avahi service browser */
2469
2329
sb = avahi_s_service_browser_new(mc.server, if_index,
2470
2330
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2471
NULL, 0, browse_callback,
2472
(void *)&mc);
2331
NULL, 0, browse_callback, NULL);
2473
2332
if(sb == NULL){
2474
2333
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2475
2334
avahi_strerror(avahi_server_errno(mc.server)));
2487
2346
fprintf_plus(stderr, "Starting Avahi loop search\n");
2488
2347
}
2489
2348
2490
ret = avahi_loop_with_timeout(simple_poll,
2491
(int)(retry_interval * 1000), &mc);
2349
ret = avahi_loop_with_timeout(mc.simple_poll,
2350
(int)(retry_interval * 1000));
2492
2351
if(debug){
2493
2352
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2494
2353
(ret == 0) ? "successfully" : "with error");
2501
2360
}
2502
2361
2503
2362
/* Cleanup things */
2504
free(mc.interfaces);
2505
2506
2363
if(sb != NULL)
2507
2364
avahi_s_service_browser_free(sb);
2508
2365
2509
2366
if(mc.server != NULL)
2510
2367
avahi_server_free(mc.server);
2511
2368
2512
if(simple_poll != NULL)
2513
avahi_simple_poll_free(simple_poll);
2369
if(mc.simple_poll != NULL)
2370
avahi_simple_poll_free(mc.simple_poll);
2514
2371
2515
2372
if(gnutls_initialized){
2516
2373
gnutls_certificate_free_credentials(mc.cred);
2533
2390
}
2534
2391
}
2535
2392
2536
/* Re-raise privileges */
2393
/* Re-raise priviliges */
2537
2394
{
2538
ret_errno = raise_privileges();
2539
if(ret_errno != 0){
2540
perror_plus("Failed to raise privileges");
2541
} else {
2542
2543
/* Run network hooks */
2544
run_network_hooks("stop", interfaces_hooks != NULL ?
2545
interfaces_hooks : "", delay);
2546
2547
/* Take down the network interfaces which were brought up */
2548
{
2549
char *interface = NULL;
2550
while((interface=argz_next(interfaces_to_take_down,
2551
interfaces_to_take_down_size,
2552
interface))){
2553
ret_errno = take_down_interface(interface);
2554
if(ret_errno != 0){
2555
errno = ret_errno;
2556
perror_plus("Failed to take down interface");
2557
}
2558
}
2559
if(debug and (interfaces_to_take_down == NULL)){
2560
fprintf_plus(stderr, "No interfaces needed to be taken"
2561
" down\n");
2562
}
2563
}
2564
}
2565
2566
ret_errno = lower_privileges_permanently();
2567
if(ret_errno != 0){
2568
perror_plus("Failed to lower privileges permanently");
2569
}
2395
raise_privileges();
2396
2397
/* Run network hooks */
2398
run_network_hooks("stop", interfaces_hooks != NULL ?
2399
interfaces_hooks : "", delay);
2400
2401
/* Take down the network interfaces which were brought up */
2402
{
2403
char *interface = NULL;
2404
while((interface=argz_next(interfaces_to_take_down,
2405
interfaces_to_take_down_size,
2406
interface))){
2407
ret_errno = take_down_interface(interface);
2408
if(ret_errno != 0){
2409
errno = ret_errno;
2410
perror_plus("Failed to take down interface");
2411
}
2412
}
2413
if(debug and (interfaces_to_take_down == NULL)){
2414
fprintf_plus(stderr, "No interfaces needed to be taken"
2415
" down\n");
2416
}
2417
}
2418
2419
lower_privileges_permanently();
2570
2420
}
2571
2421
2572
2422
free(interfaces_to_take_down);
2573
2423
free(interfaces_hooks);
2574
2424
2575
2425
/* Removes the GPGME temp directory and all files inside */
2576
if(tempdir != NULL){
2426
if(tempdir_created){
2577
2427
struct dirent **direntries = NULL;
2578
2428
struct dirent *direntry = NULL;
2579
2429
int numentries = scandir(tempdir, &direntries, notdotentries,
2580
2430
alphasort);
2581
if(numentries > 0){
2431
if (numentries > 0){
2582
2432
for(int i = 0; i < numentries; i++){
2583
2433
direntry = direntries[i];
2584
2434
char *fullname = NULL;
2599
2449
2600
2450
/* need to clean even if 0 because man page doesn't specify */
2601
2451
free(direntries);
2602
if(numentries == -1){
2452
if (numentries == -1){
2603
2453
perror_plus("scandir");
2604
2454
}
2605
2455
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0