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- Committer: Teddy Hogeborn
- Date: 2012-06-16 19:30:08 UTC
- Revision ID: teddy@recompile.se-20120616193008-2erbfaw5a5y3yay1
* debian/mandos-client.README.Debian: Update documentation for using
multiple interfaces.
multiple interfaces.
- files removed:
- debian/upstream-signing-key.pgp
- 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 © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 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
252
static bool init_gpgme(const char *seckey, const char *pubkey,
262
const char *tempdir, mandos_context *mc){
253
const char *tempdir){
263
254
gpgme_error_t rc;
264
255
gpgme_engine_info_t engine_info;
265
256
257
266
258
/*
267
259
* Helper function to insert pub and seckey to the engine keyring.
268
260
*/
284
276
return false;
285
277
}
286
278
287
rc = gpgme_op_import(mc->ctx, pgp_data);
279
rc = gpgme_op_import(mc.ctx, pgp_data);
288
280
if(rc != GPG_ERR_NO_ERROR){
289
281
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
290
282
gpgme_strsource(rc), gpgme_strerror(rc));
334
326
}
335
327
336
328
/* Create new GPGME "context" */
337
rc = gpgme_new(&(mc->ctx));
329
rc = gpgme_new(&(mc.ctx));
338
330
if(rc != GPG_ERR_NO_ERROR){
339
331
fprintf_plus(stderr, "Mandos plugin mandos-client: "
340
332
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
353
345
* Decrypt OpenPGP data.
354
346
* Returns -1 on error
355
347
*/
356
__attribute__((nonnull, warn_unused_result))
357
348
static ssize_t pgp_packet_decrypt(const char *cryptotext,
358
349
size_t crypto_size,
359
char **plaintext,
360
mandos_context *mc){
350
char **plaintext){
361
351
gpgme_data_t dh_crypto, dh_plain;
362
352
gpgme_error_t rc;
363
353
ssize_t ret;
389
379
390
380
/* Decrypt data from the cryptotext data buffer to the plaintext
391
381
data buffer */
392
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
382
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
393
383
if(rc != GPG_ERR_NO_ERROR){
394
384
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
395
385
gpgme_strsource(rc), gpgme_strerror(rc));
396
386
plaintext_length = -1;
397
387
if(debug){
398
388
gpgme_decrypt_result_t result;
399
result = gpgme_op_decrypt_result(mc->ctx);
389
result = gpgme_op_decrypt_result(mc.ctx);
400
390
if(result == NULL){
401
391
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
402
392
} else {
479
469
return plaintext_length;
480
470
}
481
471
482
__attribute__((warn_unused_result))
483
static const char *safer_gnutls_strerror(int value){
472
static const char * safer_gnutls_strerror(int value){
484
473
const char *ret = gnutls_strerror(value);
485
474
if(ret == NULL)
486
475
ret = "(unknown)";
488
477
}
489
478
490
479
/* GnuTLS log function callback */
491
__attribute__((nonnull))
492
480
static void debuggnutls(__attribute__((unused)) int level,
493
481
const char* string){
494
482
fprintf_plus(stderr, "GnuTLS: %s", string);
495
483
}
496
484
497
__attribute__((nonnull, warn_unused_result))
498
485
static int init_gnutls_global(const char *pubkeyfilename,
499
const char *seckeyfilename,
500
mandos_context *mc){
486
const char *seckeyfilename){
501
487
int ret;
502
488
503
489
if(debug){
520
506
}
521
507
522
508
/* OpenPGP credentials */
523
ret = gnutls_certificate_allocate_credentials(&mc->cred);
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
524
510
if(ret != GNUTLS_E_SUCCESS){
525
511
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
526
512
safer_gnutls_strerror(ret));
536
522
}
537
523
538
524
ret = gnutls_certificate_set_openpgp_key_file
539
(mc->cred, pubkeyfilename, seckeyfilename,
525
(mc.cred, pubkeyfilename, seckeyfilename,
540
526
GNUTLS_OPENPGP_FMT_BASE64);
541
527
if(ret != GNUTLS_E_SUCCESS){
542
528
fprintf_plus(stderr,
548
534
}
549
535
550
536
/* GnuTLS server initialization */
551
ret = gnutls_dh_params_init(&mc->dh_params);
537
ret = gnutls_dh_params_init(&mc.dh_params);
552
538
if(ret != GNUTLS_E_SUCCESS){
553
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
554
540
" initialization: %s\n",
555
541
safer_gnutls_strerror(ret));
556
542
goto globalfail;
557
543
}
558
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
559
545
if(ret != GNUTLS_E_SUCCESS){
560
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
561
547
safer_gnutls_strerror(ret));
562
548
goto globalfail;
563
549
}
564
550
565
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
566
552
567
553
return 0;
568
554
569
555
globalfail:
570
556
571
gnutls_certificate_free_credentials(mc->cred);
557
gnutls_certificate_free_credentials(mc.cred);
572
558
gnutls_global_deinit();
573
gnutls_dh_params_deinit(mc->dh_params);
559
gnutls_dh_params_deinit(mc.dh_params);
574
560
return -1;
575
561
}
576
562
577
__attribute__((nonnull, warn_unused_result))
578
static int init_gnutls_session(gnutls_session_t *session,
579
mandos_context *mc){
563
static int init_gnutls_session(gnutls_session_t *session){
580
564
int ret;
581
565
/* GnuTLS session creation */
582
566
do {
594
578
{
595
579
const char *err;
596
580
do {
597
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
581
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
598
582
if(quit_now){
599
583
gnutls_deinit(*session);
600
584
return -1;
611
595
612
596
do {
613
597
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
614
mc->cred);
598
mc.cred);
615
599
if(quit_now){
616
600
gnutls_deinit(*session);
617
601
return -1;
627
611
/* ignore client certificate if any. */
628
612
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
629
613
630
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
614
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
631
615
632
616
return 0;
633
617
}
637
621
__attribute__((unused)) const char *txt){}
638
622
639
623
/* Called when a Mandos server is found */
640
__attribute__((nonnull, warn_unused_result))
641
624
static int start_mandos_communication(const char *ip, in_port_t port,
642
625
AvahiIfIndex if_index,
643
int af, mandos_context *mc){
626
int af){
644
627
int ret, tcp_sd = -1;
645
628
ssize_t sret;
646
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
647
633
char *buffer = NULL;
648
634
char *decrypted_buffer = NULL;
649
635
size_t buffer_length = 0;
673
659
return -1;
674
660
}
675
661
676
/* If the interface is specified and we have a list of interfaces */
677
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
678
/* Check if the interface is one of the interfaces we are using */
679
bool match = false;
680
{
681
char *interface = NULL;
682
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
683
interface))){
684
if(if_nametoindex(interface) == (unsigned int)if_index){
685
match = true;
686
break;
687
}
688
}
689
}
690
if(not match){
691
/* This interface does not match any in the list, so we don't
692
connect to the server */
693
if(debug){
694
char interface[IF_NAMESIZE];
695
if(if_indextoname((unsigned int)if_index, interface) == NULL){
696
perror_plus("if_indextoname");
697
} else {
698
fprintf_plus(stderr, "Skipping server on non-used interface"
699
" \"%s\"\n",
700
if_indextoname((unsigned int)if_index,
701
interface));
702
}
703
}
704
return -1;
705
}
706
}
707
708
ret = init_gnutls_session(&session, mc);
662
ret = init_gnutls_session(&session);
709
663
if(ret != 0){
710
664
return -1;
711
665
}
730
684
731
685
memset(&to, 0, sizeof(to));
732
686
if(af == AF_INET6){
733
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
734
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);
735
689
} else { /* IPv4 */
736
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
737
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);
738
692
}
739
693
if(ret < 0 ){
740
694
int e = errno;
749
703
goto mandos_end;
750
704
}
751
705
if(af == AF_INET6){
752
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
753
if(IN6_IS_ADDR_LINKLOCAL
754
(&((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*/
755
710
if(if_index == AVAHI_IF_UNSPEC){
756
711
fprintf_plus(stderr, "An IPv6 link-local address is"
757
712
" incomplete without a network interface\n");
759
714
goto mandos_end;
760
715
}
761
716
/* Set the network interface number as scope */
762
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
717
to.in6.sin6_scope_id = (uint32_t)if_index;
763
718
}
764
719
} else {
765
((struct sockaddr_in *)&to)->sin_port = htons(port);
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
766
723
}
767
724
768
725
if(quit_now){
785
742
}
786
743
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
787
744
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
788
746
if(af == AF_INET6){
789
ret = getnameinfo((struct sockaddr *)&to,
790
sizeof(struct sockaddr_in6),
791
addrstr, sizeof(addrstr), NULL, 0,
792
NI_NUMERICHOST);
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
793
749
} else {
794
ret = getnameinfo((struct sockaddr *)&to,
795
sizeof(struct sockaddr_in),
796
addrstr, sizeof(addrstr), NULL, 0,
797
NI_NUMERICHOST);
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
798
752
}
799
if(ret == EAI_SYSTEM){
800
perror_plus("getnameinfo");
801
} else if(ret != 0) {
802
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
803
} else if(strcmp(addrstr, ip) != 0){
804
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
}
805
759
}
806
760
}
807
761
811
765
}
812
766
813
767
if(af == AF_INET6){
814
ret = connect(tcp_sd, (struct sockaddr *)&to,
815
sizeof(struct sockaddr_in6));
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
816
769
} else {
817
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
818
sizeof(struct sockaddr_in));
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
819
771
}
820
772
if(ret < 0){
821
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
822
774
int e = errno;
823
775
perror_plus("connect");
824
776
errno = e;
985
937
if(buffer_length > 0){
986
938
ssize_t decrypted_buffer_size;
987
939
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
988
&decrypted_buffer, mc);
940
&decrypted_buffer);
989
941
if(decrypted_buffer_size >= 0){
990
942
991
943
written = 0;
1039
991
return retval;
1040
992
}
1041
993
1042
__attribute__((nonnull))
1043
994
static void resolve_callback(AvahiSServiceResolver *r,
1044
995
AvahiIfIndex interface,
1045
996
AvahiProtocol proto,
1053
1004
AVAHI_GCC_UNUSED AvahiStringList *txt,
1054
1005
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1055
1006
flags,
1056
void *mc){
1007
AVAHI_GCC_UNUSED void* userdata){
1057
1008
if(r == NULL){
1058
1009
return;
1059
1010
}
1071
1022
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1072
1023
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1073
1024
domain,
1074
avahi_strerror(avahi_server_errno
1075
(((mandos_context*)mc)->server)));
1025
avahi_strerror(avahi_server_errno(mc.server)));
1076
1026
break;
1077
1027
1078
1028
case AVAHI_RESOLVER_FOUND:
1086
1036
}
1087
1037
int ret = start_mandos_communication(ip, (in_port_t)port,
1088
1038
interface,
1089
avahi_proto_to_af(proto),
1090
mc);
1039
avahi_proto_to_af(proto));
1091
1040
if(ret == 0){
1092
avahi_simple_poll_quit(simple_poll);
1041
avahi_simple_poll_quit(mc.simple_poll);
1093
1042
} else {
1094
1043
if(not add_server(ip, (in_port_t)port, interface,
1095
avahi_proto_to_af(proto),
1096
&((mandos_context*)mc)->current_server)){
1044
avahi_proto_to_af(proto))){
1097
1045
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1098
1046
" list\n", name);
1099
1047
}
1112
1060
const char *domain,
1113
1061
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1114
1062
flags,
1115
void *mc){
1063
AVAHI_GCC_UNUSED void* userdata){
1116
1064
if(b == NULL){
1117
1065
return;
1118
1066
}
1129
1077
case AVAHI_BROWSER_FAILURE:
1130
1078
1131
1079
fprintf_plus(stderr, "(Avahi browser) %s\n",
1132
avahi_strerror(avahi_server_errno
1133
(((mandos_context*)mc)->server)));
1134
avahi_simple_poll_quit(simple_poll);
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1135
1082
return;
1136
1083
1137
1084
case AVAHI_BROWSER_NEW:
1140
1087
the callback function is called the Avahi server will free the
1141
1088
resolver for us. */
1142
1089
1143
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1144
interface, protocol, name, type,
1145
domain, protocol, 0,
1146
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)
1147
1093
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1148
1094
" %s\n", name,
1149
avahi_strerror(avahi_server_errno
1150
(((mandos_context*)mc)->server)));
1095
avahi_strerror(avahi_server_errno(mc.server)));
1151
1096
break;
1152
1097
1153
1098
case AVAHI_BROWSER_REMOVE:
1172
1117
signal_received = sig;
1173
1118
int old_errno = errno;
1174
1119
/* set main loop to exit */
1175
if(simple_poll != NULL){
1176
avahi_simple_poll_quit(simple_poll);
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1177
1122
}
1178
1123
errno = old_errno;
1179
1124
}
1180
1125
1181
__attribute__((nonnull, warn_unused_result))
1182
1126
bool get_flags(const char *ifname, struct ifreq *ifr){
1183
1127
int ret;
1184
1128
error_t ret_errno;
1203
1147
return true;
1204
1148
}
1205
1149
1206
__attribute__((nonnull, warn_unused_result))
1207
1150
bool good_flags(const char *ifname, const struct ifreq *ifr){
1208
1151
1209
1152
/* Reject the loopback device */
1251
1194
* corresponds to an acceptable network device.
1252
1195
* (This function is passed to scandir(3) as a filter function.)
1253
1196
*/
1254
__attribute__((nonnull, warn_unused_result))
1255
1197
int good_interface(const struct dirent *if_entry){
1256
1198
if(if_entry->d_name[0] == '.'){
1257
1199
return 0;
1275
1217
/*
1276
1218
* This function determines if a network interface is up.
1277
1219
*/
1278
__attribute__((nonnull, warn_unused_result))
1279
1220
bool interface_is_up(const char *interface){
1280
1221
struct ifreq ifr;
1281
1222
if(not get_flags(interface, &ifr)){
1292
1233
/*
1293
1234
* This function determines if a network interface is running
1294
1235
*/
1295
__attribute__((nonnull, warn_unused_result))
1296
1236
bool interface_is_running(const char *interface){
1297
1237
struct ifreq ifr;
1298
1238
if(not get_flags(interface, &ifr)){
1306
1246
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1307
1247
}
1308
1248
1309
__attribute__((nonnull, pure, warn_unused_result))
1310
1249
int notdotentries(const struct dirent *direntry){
1311
1250
/* Skip "." and ".." */
1312
1251
if(direntry->d_name[0] == '.'
1319
1258
}
1320
1259
1321
1260
/* Is this directory entry a runnable program? */
1322
__attribute__((nonnull, warn_unused_result))
1323
1261
int runnable_hook(const struct dirent *direntry){
1324
1262
int ret;
1325
1263
size_t sret;
1380
1318
return 1;
1381
1319
}
1382
1320
1383
__attribute__((nonnull, warn_unused_result))
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1385
mandos_context *mc){
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1386
1322
int ret;
1387
1323
struct timespec now;
1388
1324
struct timespec waited_time;
1389
1325
intmax_t block_time;
1390
1326
1391
1327
while(true){
1392
if(mc->current_server == NULL){
1393
if(debug){
1328
if(mc.current_server == NULL){
1329
if (debug){
1394
1330
fprintf_plus(stderr, "Wait until first server is found."
1395
1331
" No timeout!\n");
1396
1332
}
1397
1333
ret = avahi_simple_poll_iterate(s, -1);
1398
1334
} else {
1399
if(debug){
1335
if (debug){
1400
1336
fprintf_plus(stderr, "Check current_server if we should run"
1401
1337
" it, or wait\n");
1402
1338
}
1409
1345
/* Calculating in ms how long time between now and server
1410
1346
who we visted longest time ago. Now - last seen. */
1411
1347
waited_time.tv_sec = (now.tv_sec
1412
- mc->current_server->last_seen.tv_sec);
1348
- mc.current_server->last_seen.tv_sec);
1413
1349
waited_time.tv_nsec = (now.tv_nsec
1414
- mc->current_server->last_seen.tv_nsec);
1350
- mc.current_server->last_seen.tv_nsec);
1415
1351
/* total time is 10s/10,000ms.
1416
1352
Converting to s from ms by dividing by 1,000,
1417
1353
and ns to ms by dividing by 1,000,000. */
1419
1355
- ((intmax_t)waited_time.tv_sec * 1000))
1420
1356
- ((intmax_t)waited_time.tv_nsec / 1000000));
1421
1357
1422
if(debug){
1358
if (debug){
1423
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1424
1360
block_time);
1425
1361
}
1426
1362
1427
1363
if(block_time <= 0){
1428
ret = start_mandos_communication(mc->current_server->ip,
1429
mc->current_server->port,
1430
mc->current_server->if_index,
1431
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);
1432
1368
if(ret == 0){
1433
avahi_simple_poll_quit(s);
1369
avahi_simple_poll_quit(mc.simple_poll);
1434
1370
return 0;
1435
1371
}
1436
1372
ret = clock_gettime(CLOCK_MONOTONIC,
1437
&mc->current_server->last_seen);
1373
&mc.current_server->last_seen);
1438
1374
if(ret == -1){
1439
1375
perror_plus("clock_gettime");
1440
1376
return -1;
1441
1377
}
1442
mc->current_server = mc->current_server->next;
1378
mc.current_server = mc.current_server->next;
1443
1379
block_time = 0; /* Call avahi to find new Mandos
1444
1380
servers, but don't block */
1445
1381
}
1447
1383
ret = avahi_simple_poll_iterate(s, (int)block_time);
1448
1384
}
1449
1385
if(ret != 0){
1450
if(ret > 0 or errno != EINTR){
1386
if (ret > 0 or errno != EINTR){
1451
1387
return (ret != 1) ? ret : 0;
1452
1388
}
1453
1389
}
1455
1391
}
1456
1392
1457
1393
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
1394
error_t raise_privileges(void){
1460
1395
error_t old_errno = errno;
1461
1396
error_t ret_errno = 0;
1468
1403
}
1469
1404
1470
1405
/* Set effective and real user ID to 0. Return errno. */
1471
__attribute__((warn_unused_result))
1472
1406
error_t raise_privileges_permanently(void){
1473
1407
error_t old_errno = errno;
1474
1408
error_t ret_errno = raise_privileges();
1485
1419
}
1486
1420
1487
1421
/* Set effective user ID to unprivileged saved user ID */
1488
__attribute__((warn_unused_result))
1489
1422
error_t lower_privileges(void){
1490
1423
error_t old_errno = errno;
1491
1424
error_t ret_errno = 0;
1498
1431
}
1499
1432
1500
1433
/* Lower privileges permanently */
1501
__attribute__((warn_unused_result))
1502
1434
error_t lower_privileges_permanently(void){
1503
1435
error_t old_errno = errno;
1504
1436
error_t ret_errno = 0;
1510
1442
return ret_errno;
1511
1443
}
1512
1444
1513
__attribute__((nonnull))
1514
void run_network_hooks(const char *mode, const char *interface,
1445
bool run_network_hooks(const char *mode, const char *interface,
1515
1446
const float delay){
1516
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1449
int ret;
1517
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1518
1451
alphasort);
1519
1452
if(numhooks == -1){
1526
1459
perror_plus("scandir");
1527
1460
}
1528
1461
} else {
1529
struct dirent *direntry;
1530
int ret;
1531
1462
int devnull = open("/dev/null", O_RDONLY);
1532
1463
for(int i = 0; i < numhooks; i++){
1533
1464
direntry = direntries[i];
1545
1476
if(hook_pid == 0){
1546
1477
/* Child */
1547
1478
/* Raise privileges */
1548
if(raise_privileges_permanently() != 0){
1549
perror_plus("Failed to raise privileges");
1550
_exit(EX_NOPERM);
1551
}
1479
raise_privileges_permanently();
1552
1480
/* Set group */
1553
1481
errno = 0;
1554
1482
ret = setgid(0);
1555
1483
if(ret == -1){
1556
1484
perror_plus("setgid");
1557
_exit(EX_NOPERM);
1558
1485
}
1559
1486
/* Reset supplementary groups */
1560
1487
errno = 0;
1561
1488
ret = setgroups(0, NULL);
1562
1489
if(ret == -1){
1563
1490
perror_plus("setgroups");
1564
_exit(EX_NOPERM);
1565
}
1566
ret = dup2(devnull, STDIN_FILENO);
1567
if(ret == -1){
1568
perror_plus("dup2(devnull, STDIN_FILENO)");
1569
_exit(EX_OSERR);
1570
}
1571
ret = close(devnull);
1572
if(ret == -1){
1573
perror_plus("close");
1574
_exit(EX_OSERR);
1575
}
1576
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1577
if(ret == -1){
1578
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1579
_exit(EX_OSERR);
1580
}
1491
}
1492
dup2(devnull, STDIN_FILENO);
1493
close(devnull);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1581
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1582
1496
if(ret == -1){
1583
1497
perror_plus("setenv");
1599
1513
_exit(EX_OSERR);
1600
1514
}
1601
1515
char *delaystring;
1602
ret = asprintf(&delaystring, "%f", (double)delay);
1516
ret = asprintf(&delaystring, "%f", delay);
1603
1517
if(ret == -1){
1604
1518
perror_plus("asprintf");
1605
1519
_exit(EX_OSERR);
1658
1572
}
1659
1573
close(devnull);
1660
1574
}
1575
return true;
1661
1576
}
1662
1577
1663
__attribute__((nonnull, warn_unused_result))
1664
1578
error_t bring_up_interface(const char *const interface,
1665
1579
const float delay){
1580
int sd = -1;
1666
1581
error_t old_errno = errno;
1667
int ret;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1668
1584
struct ifreq network;
1669
1585
unsigned int if_index = if_nametoindex(interface);
1670
1586
if(if_index == 0){
1679
1595
}
1680
1596
1681
1597
if(not interface_is_up(interface)){
1682
error_t ret_errno = 0, ioctl_errno = 0;
1683
if(not get_flags(interface, &network)){
1598
if(not get_flags(interface, &network) and debug){
1684
1599
ret_errno = errno;
1685
1600
fprintf_plus(stderr, "Failed to get flags for interface "
1686
1601
"\"%s\"\n", interface);
1687
errno = old_errno;
1688
1602
return ret_errno;
1689
1603
}
1690
network.ifr_flags |= IFF_UP; /* set flag */
1604
network.ifr_flags |= IFF_UP;
1691
1605
1692
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1693
if(sd == -1){
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1694
1608
ret_errno = errno;
1695
1609
perror_plus("socket");
1696
1610
errno = old_errno;
1697
1611
return ret_errno;
1698
1612
}
1699
1613
1700
1614
if(quit_now){
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1702
if(ret == -1){
1703
perror_plus("close");
1704
}
1615
close(sd);
1705
1616
errno = old_errno;
1706
1617
return EINTR;
1707
1618
}
1711
1622
interface);
1712
1623
}
1713
1624
1714
/* Raise privileges */
1715
ret_errno = raise_privileges();
1716
bool restore_loglevel = false;
1717
if(ret_errno != 0){
1718
perror_plus("Failed to raise privileges");
1719
}
1625
/* Raise priviliges */
1626
raise_privileges();
1627
1720
1628
#ifdef __linux__
1721
int ret_linux;
1722
if(ret_errno == 0){
1723
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1724
messages about the network interface to mess up the prompt */
1725
ret_linux = klogctl(8, NULL, 5);
1726
if(ret_linux == -1){
1727
perror_plus("klogctl");
1728
} else {
1729
restore_loglevel = true;
1730
}
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");
1731
1636
}
1732
1637
#endif /* __linux__ */
1733
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1734
ioctl_errno = errno;
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1735
1640
#ifdef __linux__
1736
1641
if(restore_loglevel){
1737
1642
ret_linux = klogctl(7, NULL, 0);
1741
1646
}
1742
1647
#endif /* __linux__ */
1743
1648
1744
/* If raise_privileges() succeeded above */
1745
if(ret_errno == 0){
1746
/* Lower privileges */
1747
ret_errno = lower_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to lower privileges");
1751
}
1752
}
1649
/* Lower privileges */
1650
lower_privileges();
1753
1651
1754
1652
/* Close the socket */
1755
1653
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1758
1656
}
1759
1657
1760
1658
if(ret_setflags == -1){
1761
errno = ioctl_errno;
1659
errno = ret_errno;
1762
1660
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1763
1661
errno = old_errno;
1764
return ioctl_errno;
1662
return ret_errno;
1765
1663
}
1766
1664
} else if(debug){
1767
1665
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1785
1683
return 0;
1786
1684
}
1787
1685
1788
__attribute__((nonnull, warn_unused_result))
1789
1686
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1790
1688
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1791
1691
struct ifreq network;
1792
1692
unsigned int if_index = if_nametoindex(interface);
1793
1693
if(if_index == 0){
1796
1696
return ENXIO;
1797
1697
}
1798
1698
if(interface_is_up(interface)){
1799
error_t ret_errno = 0, ioctl_errno = 0;
1800
1699
if(not get_flags(interface, &network) and debug){
1801
1700
ret_errno = errno;
1802
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1803
1702
"\"%s\"\n", interface);
1804
errno = old_errno;
1805
1703
return ret_errno;
1806
1704
}
1807
1705
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1808
1706
1809
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1810
if(sd == -1){
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1811
1709
ret_errno = errno;
1812
1710
perror_plus("socket");
1813
1711
errno = old_errno;
1819
1717
interface);
1820
1718
}
1821
1719
1822
/* Raise privileges */
1823
ret_errno = raise_privileges();
1824
if(ret_errno != 0){
1825
perror_plus("Failed to raise privileges");
1826
}
1827
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1828
ioctl_errno = errno;
1829
1830
/* If raise_privileges() succeeded above */
1831
if(ret_errno == 0){
1832
/* Lower privileges */
1833
ret_errno = lower_privileges();
1834
if(ret_errno != 0){
1835
errno = ret_errno;
1836
perror_plus("Failed to lower privileges");
1837
}
1838
}
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();
1839
1728
1840
1729
/* Close the socket */
1841
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1842
1731
if(ret == -1){
1843
1732
perror_plus("close");
1844
1733
}
1845
1734
1846
1735
if(ret_setflags == -1){
1847
errno = ioctl_errno;
1736
errno = ret_errno;
1848
1737
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1849
1738
errno = old_errno;
1850
return ioctl_errno;
1739
return ret_errno;
1851
1740
}
1852
1741
} else if(debug){
1853
1742
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1859
1748
}
1860
1749
1861
1750
int main(int argc, char *argv[]){
1862
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1863
.priority = "SECURE256:!CTYPE-X.509:"
1864
"+CTYPE-OPENPGP", .current_server = NULL,
1865
.interfaces = NULL, .interfaces_size = 0 };
1866
1751
AvahiSServiceBrowser *sb = NULL;
1867
1752
error_t ret_errno;
1868
1753
int ret;
1869
1754
intmax_t tmpmax;
1870
1755
char *tmp;
1871
1756
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1872
1759
char *interfaces_to_take_down = NULL;
1873
1760
size_t interfaces_to_take_down_size = 0;
1874
1761
char tempdir[] = "/tmp/mandosXXXXXX";
1877
1764
const char *seckey = PATHDIR "/" SECKEY;
1878
1765
const char *pubkey = PATHDIR "/" PUBKEY;
1879
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1880
1768
1881
1769
bool gnutls_initialized = false;
1882
1770
bool gpgme_initialized = false;
1973
1861
connect_to = arg;
1974
1862
break;
1975
1863
case 'i': /* --interface */
1976
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1977
arg, (int)',');
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
1978
1866
if(ret_errno != 0){
1979
1867
argp_error(state, "%s", strerror(ret_errno));
1980
1868
}
2060
1948
/* Work around Debian bug #633582:
2061
1949
<http://bugs.debian.org/633582> */
2062
1950
2063
/* Re-raise privileges */
2064
ret_errno = raise_privileges();
2065
if(ret_errno != 0){
2066
errno = ret_errno;
2067
perror_plus("Failed to raise privileges");
2068
} else {
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
2069
1953
struct stat st;
2070
1954
2071
1955
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2111
1995
}
2112
1996
2113
1997
/* Lower privileges */
2114
ret_errno = lower_privileges();
2115
if(ret_errno != 0){
2116
errno = ret_errno;
2117
perror_plus("Failed to lower privileges");
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2118
2002
}
2119
2003
}
2120
2004
}
2121
2005
2122
/* Remove invalid interface names (except "none") */
2006
/* Remove empty interface names */
2123
2007
{
2124
2008
char *interface = NULL;
2125
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2009
while((interface = argz_next(interfaces, interfaces_size,
2126
2010
interface))){
2127
if(strcmp(interface, "none") != 0
2128
and if_nametoindex(interface) == 0){
2129
if(interface[0] != '\0'){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2130
2013
fprintf_plus(stderr, "Not using nonexisting interface"
2131
2014
" \"%s\"\n", interface);
2132
2015
}
2133
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2016
argz_delete(&interfaces, &interfaces_size, interface);
2134
2017
interface = NULL;
2135
2018
}
2136
2019
}
2138
2021
2139
2022
/* Run network hooks */
2140
2023
{
2141
if(mc.interfaces != NULL){
2142
interfaces_hooks = malloc(mc.interfaces_size);
2024
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2143
2027
if(interfaces_hooks == NULL){
2144
2028
perror_plus("malloc");
2145
2029
goto end;
2146
2030
}
2147
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2148
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2149
}
2150
run_network_hooks("start", interfaces_hooks != NULL ?
2151
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
}
2152
2040
}
2153
2041
2154
2042
if(not debug){
2159
2047
from the signal handler */
2160
2048
/* Initialize the pseudo-RNG for Avahi */
2161
2049
srand((unsigned int) time(NULL));
2162
simple_poll = avahi_simple_poll_new();
2163
if(simple_poll == NULL){
2050
mc.simple_poll = avahi_simple_poll_new();
2051
if(mc.simple_poll == NULL){
2164
2052
fprintf_plus(stderr,
2165
2053
"Avahi: Failed to create simple poll object.\n");
2166
2054
exitcode = EX_UNAVAILABLE;
2231
2119
}
2232
2120
2233
2121
/* If no interfaces were specified, make a list */
2234
if(mc.interfaces == NULL){
2122
if(interfaces == NULL){
2235
2123
struct dirent **direntries;
2236
2124
/* Look for any good interfaces */
2237
2125
ret = scandir(sys_class_net, &direntries, good_interface,
2239
2127
if(ret >= 1){
2240
2128
/* Add all found interfaces to interfaces list */
2241
2129
for(int i = 0; i < ret; ++i){
2242
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2243
2131
direntries[i]->d_name);
2244
2132
if(ret_errno != 0){
2245
errno = ret_errno;
2246
2133
perror_plus("argz_add");
2247
2134
continue;
2248
2135
}
2260
2147
}
2261
2148
}
2262
2149
2263
/* Bring up interfaces which are down, and remove any "none"s */
2264
{
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)){
2265
2162
char *interface = NULL;
2266
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2163
while((interface = argz_next(interfaces, interfaces_size,
2267
2164
interface))){
2268
/* If interface name is "none", stop bringing up interfaces.
2269
Also remove all instances of "none" from the list */
2270
if(strcmp(interface, "none") == 0){
2271
argz_delete(&mc.interfaces, &mc.interfaces_size,
2272
interface);
2273
interface = NULL;
2274
while((interface = argz_next(mc.interfaces,
2275
mc.interfaces_size, interface))){
2276
if(strcmp(interface, "none") == 0){
2277
argz_delete(&mc.interfaces, &mc.interfaces_size,
2278
interface);
2279
interface = NULL;
2280
}
2281
}
2282
break;
2283
}
2284
2165
bool interface_was_up = interface_is_up(interface);
2285
errno = bring_up_interface(interface, delay);
2166
ret = bring_up_interface(interface, delay);
2286
2167
if(not interface_was_up){
2287
if(errno != 0){
2168
if(ret != 0){
2169
errno = ret;
2288
2170
perror_plus("Failed to bring up interface");
2289
2171
} else {
2290
errno = argz_add(&interfaces_to_take_down,
2291
&interfaces_to_take_down_size,
2292
interface);
2293
if(errno != 0){
2294
perror_plus("argz_add");
2295
}
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2174
interface);
2296
2175
}
2297
2176
}
2298
2177
}
2178
free(interfaces);
2179
interfaces = NULL;
2180
interfaces_size = 0;
2299
2181
if(debug and (interfaces_to_take_down == NULL)){
2300
2182
fprintf_plus(stderr, "No interfaces were brought up\n");
2301
2183
}
2302
2184
}
2303
2185
2304
/* If we only got one interface, explicitly use only that one */
2305
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2306
if(debug){
2307
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2308
mc.interfaces);
2309
}
2310
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2311
}
2312
2313
2186
if(quit_now){
2314
2187
goto end;
2315
2188
}
2316
2189
2317
ret = init_gnutls_global(pubkey, seckey, &mc);
2190
ret = init_gnutls_global(pubkey, seckey);
2318
2191
if(ret == -1){
2319
2192
fprintf_plus(stderr, "init_gnutls_global failed\n");
2320
2193
exitcode = EX_UNAVAILABLE;
2337
2210
goto end;
2338
2211
}
2339
2212
2340
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2213
if(not init_gpgme(pubkey, seckey, tempdir)){
2341
2214
fprintf_plus(stderr, "init_gpgme failed\n");
2342
2215
exitcode = EX_UNAVAILABLE;
2343
2216
goto end;
2373
2246
exitcode = EX_USAGE;
2374
2247
goto end;
2375
2248
}
2376
2249
2377
2250
if(quit_now){
2378
2251
goto end;
2379
2252
}
2400
2273
}
2401
2274
2402
2275
while(not quit_now){
2403
ret = start_mandos_communication(address, port, if_index, af,
2404
&mc);
2276
ret = start_mandos_communication(address, port, if_index, af);
2405
2277
if(quit_now or ret == 0){
2406
2278
break;
2407
2279
}
2409
2281
fprintf_plus(stderr, "Retrying in %d seconds\n",
2410
2282
(int)retry_interval);
2411
2283
}
2412
sleep((unsigned int)retry_interval);
2284
sleep((int)retry_interval);
2413
2285
}
2414
2286
2415
if(not quit_now){
2287
if (not quit_now){
2416
2288
exitcode = EXIT_SUCCESS;
2417
2289
}
2418
2290
2433
2305
config.publish_domain = 0;
2434
2306
2435
2307
/* Allocate a new server */
2436
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2437
&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);
2438
2311
2439
2312
/* Free the Avahi configuration data */
2440
2313
avahi_server_config_free(&config);
2455
2328
/* Create the Avahi service browser */
2456
2329
sb = avahi_s_service_browser_new(mc.server, if_index,
2457
2330
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2458
NULL, 0, browse_callback,
2459
(void *)&mc);
2331
NULL, 0, browse_callback, NULL);
2460
2332
if(sb == NULL){
2461
2333
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2462
2334
avahi_strerror(avahi_server_errno(mc.server)));
2474
2346
fprintf_plus(stderr, "Starting Avahi loop search\n");
2475
2347
}
2476
2348
2477
ret = avahi_loop_with_timeout(simple_poll,
2478
(int)(retry_interval * 1000), &mc);
2349
ret = avahi_loop_with_timeout(mc.simple_poll,
2350
(int)(retry_interval * 1000));
2479
2351
if(debug){
2480
2352
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2481
2353
(ret == 0) ? "successfully" : "with error");
2488
2360
}
2489
2361
2490
2362
/* Cleanup things */
2491
free(mc.interfaces);
2492
2493
2363
if(sb != NULL)
2494
2364
avahi_s_service_browser_free(sb);
2495
2365
2496
2366
if(mc.server != NULL)
2497
2367
avahi_server_free(mc.server);
2498
2368
2499
if(simple_poll != NULL)
2500
avahi_simple_poll_free(simple_poll);
2369
if(mc.simple_poll != NULL)
2370
avahi_simple_poll_free(mc.simple_poll);
2501
2371
2502
2372
if(gnutls_initialized){
2503
2373
gnutls_certificate_free_credentials(mc.cred);
2520
2390
}
2521
2391
}
2522
2392
2523
/* Re-raise privileges */
2393
/* Re-raise priviliges */
2524
2394
{
2525
ret_errno = raise_privileges();
2526
if(ret_errno != 0){
2527
perror_plus("Failed to raise privileges");
2528
} else {
2529
2530
/* Run network hooks */
2531
run_network_hooks("stop", interfaces_hooks != NULL ?
2532
interfaces_hooks : "", delay);
2533
2534
/* Take down the network interfaces which were brought up */
2535
{
2536
char *interface = NULL;
2537
while((interface=argz_next(interfaces_to_take_down,
2538
interfaces_to_take_down_size,
2539
interface))){
2540
ret_errno = take_down_interface(interface);
2541
if(ret_errno != 0){
2542
errno = ret_errno;
2543
perror_plus("Failed to take down interface");
2544
}
2545
}
2546
if(debug and (interfaces_to_take_down == NULL)){
2547
fprintf_plus(stderr, "No interfaces needed to be taken"
2548
" down\n");
2549
}
2550
}
2551
}
2552
ret_errno = lower_privileges_permanently();
2553
if(ret_errno != 0){
2554
perror_plus("Failed to lower privileges permanently");
2555
}
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();
2556
2420
}
2557
2421
2558
2422
free(interfaces_to_take_down);
2564
2428
struct dirent *direntry = NULL;
2565
2429
int numentries = scandir(tempdir, &direntries, notdotentries,
2566
2430
alphasort);
2567
if(numentries > 0){
2431
if (numentries > 0){
2568
2432
for(int i = 0; i < numentries; i++){
2569
2433
direntry = direntries[i];
2570
2434
char *fullname = NULL;
2585
2449
2586
2450
/* need to clean even if 0 because man page doesn't specify */
2587
2451
free(direntries);
2588
if(numentries == -1){
2452
if (numentries == -1){
2589
2453
perror_plus("scandir");
2590
2454
}
2591
2455
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0