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- Committer: Teddy Hogeborn
- Date: 2012-06-16 22:38:54 UTC
- Revision ID: teddy@recompile.se-20120616223854-mfxkg6fgqr56sma5
* plugins.d/mandos-client (mandos_context): Removed "simple_poll"
member.
(simple_poll): New global variable. All users changed.
member.
(simple_poll): New global variable. All users changed.
- 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() */
164
161
const char *priority;
165
162
gpgme_ctx_t ctx;
166
163
server *current_server;
167
char *interfaces;
168
size_t interfaces_size;
169
164
} mandos_context;
170
165
171
166
/* global so signal handler can reach it*/
172
167
AvahiSimplePoll *simple_poll;
168
mandos_context mc = { .server = NULL, .dh_bits = 1024,
169
.priority = "SECURE256:!CTYPE-X.509:"
170
"+CTYPE-OPENPGP", .current_server = NULL };
173
171
174
172
sig_atomic_t quit_now = 0;
175
173
int signal_received = 0;
183
181
perror(print_text);
184
182
}
185
183
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
184
__attribute__((format (gnu_printf, 2, 3)))
187
185
int fprintf_plus(FILE *stream, const char *format, ...){
188
186
va_list ap;
189
187
va_start (ap, format);
190
188
191
189
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
192
190
program_invocation_short_name));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
194
192
}
195
193
196
194
/*
198
196
* bytes. "buffer_capacity" is how much is currently allocated,
199
197
* "buffer_length" is how much is already used.
200
198
*/
201
__attribute__((nonnull, warn_unused_result))
202
199
size_t incbuffer(char **buffer, size_t buffer_length,
203
200
size_t buffer_capacity){
204
201
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;
202
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
203
if(buffer == NULL){
211
204
return 0;
212
205
}
213
*buffer = new_buf;
214
206
buffer_capacity += BUFFER_SIZE;
215
207
}
216
208
return buffer_capacity;
217
209
}
218
210
219
211
/* Add server to set of servers to retry periodically */
220
__attribute__((nonnull, warn_unused_result))
221
212
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
222
int af, server **current_server){
213
int af){
223
214
int ret;
224
215
server *new_server = malloc(sizeof(server));
225
216
if(new_server == NULL){
234
225
perror_plus("strdup");
235
226
return false;
236
227
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
242
228
/* Special case of first server */
243
if(*current_server == NULL){
229
if (mc.current_server == NULL){
244
230
new_server->next = new_server;
245
231
new_server->prev = new_server;
246
*current_server = new_server;
232
mc.current_server = new_server;
233
/* Place the new server last in the list */
247
234
} else {
248
/* Place the new server last in the list */
249
new_server->next = *current_server;
250
new_server->prev = (*current_server)->prev;
235
new_server->next = mc.current_server;
236
new_server->prev = mc.current_server->prev;
251
237
new_server->prev->next = new_server;
252
(*current_server)->prev = new_server;
238
mc.current_server->prev = new_server;
239
}
240
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
241
if(ret == -1){
242
perror_plus("clock_gettime");
243
return false;
253
244
}
254
245
return true;
255
246
}
257
248
/*
258
249
* Initialize GPGME.
259
250
*/
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){
251
static bool init_gpgme(const char *seckey, const char *pubkey,
252
const char *tempdir){
265
253
gpgme_error_t rc;
266
254
gpgme_engine_info_t engine_info;
267
255
268
256
/*
269
257
* Helper function to insert pub and seckey to the engine keyring.
270
258
*/
271
bool import_key(const char * const filename){
259
bool import_key(const char *filename){
272
260
int ret;
273
261
int fd;
274
262
gpgme_data_t pgp_data;
286
274
return false;
287
275
}
288
276
289
rc = gpgme_op_import(mc->ctx, pgp_data);
277
rc = gpgme_op_import(mc.ctx, pgp_data);
290
278
if(rc != GPG_ERR_NO_ERROR){
291
279
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
292
280
gpgme_strsource(rc), gpgme_strerror(rc));
336
324
}
337
325
338
326
/* Create new GPGME "context" */
339
rc = gpgme_new(&(mc->ctx));
327
rc = gpgme_new(&(mc.ctx));
340
328
if(rc != GPG_ERR_NO_ERROR){
341
329
fprintf_plus(stderr, "Mandos plugin mandos-client: "
342
330
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
355
343
* Decrypt OpenPGP data.
356
344
* Returns -1 on error
357
345
*/
358
__attribute__((nonnull, warn_unused_result))
359
346
static ssize_t pgp_packet_decrypt(const char *cryptotext,
360
347
size_t crypto_size,
361
char **plaintext,
362
mandos_context *mc){
348
char **plaintext){
363
349
gpgme_data_t dh_crypto, dh_plain;
364
350
gpgme_error_t rc;
365
351
ssize_t ret;
391
377
392
378
/* Decrypt data from the cryptotext data buffer to the plaintext
393
379
data buffer */
394
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
380
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
395
381
if(rc != GPG_ERR_NO_ERROR){
396
382
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
397
383
gpgme_strsource(rc), gpgme_strerror(rc));
398
384
plaintext_length = -1;
399
385
if(debug){
400
386
gpgme_decrypt_result_t result;
401
result = gpgme_op_decrypt_result(mc->ctx);
387
result = gpgme_op_decrypt_result(mc.ctx);
402
388
if(result == NULL){
403
389
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
404
390
} else {
481
467
return plaintext_length;
482
468
}
483
469
484
__attribute__((warn_unused_result))
485
static const char *safer_gnutls_strerror(int value){
470
static const char * safer_gnutls_strerror(int value){
486
471
const char *ret = gnutls_strerror(value);
487
472
if(ret == NULL)
488
473
ret = "(unknown)";
490
475
}
491
476
492
477
/* GnuTLS log function callback */
493
__attribute__((nonnull))
494
478
static void debuggnutls(__attribute__((unused)) int level,
495
479
const char* string){
496
480
fprintf_plus(stderr, "GnuTLS: %s", string);
497
481
}
498
482
499
__attribute__((nonnull, warn_unused_result))
500
483
static int init_gnutls_global(const char *pubkeyfilename,
501
const char *seckeyfilename,
502
mandos_context *mc){
484
const char *seckeyfilename){
503
485
int ret;
504
486
505
487
if(debug){
522
504
}
523
505
524
506
/* OpenPGP credentials */
525
ret = gnutls_certificate_allocate_credentials(&mc->cred);
507
ret = gnutls_certificate_allocate_credentials(&mc.cred);
526
508
if(ret != GNUTLS_E_SUCCESS){
527
509
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
528
510
safer_gnutls_strerror(ret));
538
520
}
539
521
540
522
ret = gnutls_certificate_set_openpgp_key_file
541
(mc->cred, pubkeyfilename, seckeyfilename,
523
(mc.cred, pubkeyfilename, seckeyfilename,
542
524
GNUTLS_OPENPGP_FMT_BASE64);
543
525
if(ret != GNUTLS_E_SUCCESS){
544
526
fprintf_plus(stderr,
550
532
}
551
533
552
534
/* GnuTLS server initialization */
553
ret = gnutls_dh_params_init(&mc->dh_params);
535
ret = gnutls_dh_params_init(&mc.dh_params);
554
536
if(ret != GNUTLS_E_SUCCESS){
555
537
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
556
538
" initialization: %s\n",
557
539
safer_gnutls_strerror(ret));
558
540
goto globalfail;
559
541
}
560
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
542
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
561
543
if(ret != GNUTLS_E_SUCCESS){
562
544
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
563
545
safer_gnutls_strerror(ret));
564
546
goto globalfail;
565
547
}
566
548
567
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
549
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
568
550
569
551
return 0;
570
552
571
553
globalfail:
572
554
573
gnutls_certificate_free_credentials(mc->cred);
555
gnutls_certificate_free_credentials(mc.cred);
574
556
gnutls_global_deinit();
575
gnutls_dh_params_deinit(mc->dh_params);
557
gnutls_dh_params_deinit(mc.dh_params);
576
558
return -1;
577
559
}
578
560
579
__attribute__((nonnull, warn_unused_result))
580
static int init_gnutls_session(gnutls_session_t *session,
581
mandos_context *mc){
561
static int init_gnutls_session(gnutls_session_t *session){
582
562
int ret;
583
563
/* GnuTLS session creation */
584
564
do {
596
576
{
597
577
const char *err;
598
578
do {
599
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
579
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
600
580
if(quit_now){
601
581
gnutls_deinit(*session);
602
582
return -1;
613
593
614
594
do {
615
595
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
616
mc->cred);
596
mc.cred);
617
597
if(quit_now){
618
598
gnutls_deinit(*session);
619
599
return -1;
629
609
/* ignore client certificate if any. */
630
610
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
631
611
632
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
612
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
633
613
634
614
return 0;
635
615
}
639
619
__attribute__((unused)) const char *txt){}
640
620
641
621
/* Called when a Mandos server is found */
642
__attribute__((nonnull, warn_unused_result))
643
622
static int start_mandos_communication(const char *ip, in_port_t port,
644
623
AvahiIfIndex if_index,
645
int af, mandos_context *mc){
624
int af){
646
625
int ret, tcp_sd = -1;
647
626
ssize_t sret;
648
struct sockaddr_storage to;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
649
631
char *buffer = NULL;
650
632
char *decrypted_buffer = NULL;
651
633
size_t buffer_length = 0;
675
657
return -1;
676
658
}
677
659
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);
660
ret = init_gnutls_session(&session);
711
661
if(ret != 0){
712
662
return -1;
713
663
}
732
682
733
683
memset(&to, 0, sizeof(to));
734
684
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);
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
737
687
} 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);
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
740
690
}
741
691
if(ret < 0 ){
742
692
int e = errno;
751
701
goto mandos_end;
752
702
}
753
703
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)){
704
to.in6.sin6_port = htons(port);
705
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
-Wunreachable-code*/
757
708
if(if_index == AVAHI_IF_UNSPEC){
758
709
fprintf_plus(stderr, "An IPv6 link-local address is"
759
710
" incomplete without a network interface\n");
761
712
goto mandos_end;
762
713
}
763
714
/* Set the network interface number as scope */
764
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
715
to.in6.sin6_scope_id = (uint32_t)if_index;
765
716
}
766
717
} else {
767
((struct sockaddr_in *)&to)->sin_port = htons(port);
718
to.in.sin_port = htons(port); /* Spurious warnings from
719
-Wconversion and
720
-Wunreachable-code */
768
721
}
769
722
770
723
if(quit_now){
787
740
}
788
741
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
789
742
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
790
744
if(af == AF_INET6){
791
ret = getnameinfo((struct sockaddr *)&to,
792
sizeof(struct sockaddr_in6),
793
addrstr, sizeof(addrstr), NULL, 0,
794
NI_NUMERICHOST);
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
795
747
} else {
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
800
750
}
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);
751
if(pcret == NULL){
752
perror_plus("inet_ntop");
753
} else {
754
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
756
}
807
757
}
808
758
}
809
759
813
763
}
814
764
815
765
if(af == AF_INET6){
816
ret = connect(tcp_sd, (struct sockaddr *)&to,
817
sizeof(struct sockaddr_in6));
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
818
767
} else {
819
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
820
sizeof(struct sockaddr_in));
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
821
769
}
822
770
if(ret < 0){
823
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
824
772
int e = errno;
825
773
perror_plus("connect");
826
774
errno = e;
987
935
if(buffer_length > 0){
988
936
ssize_t decrypted_buffer_size;
989
937
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
990
&decrypted_buffer, mc);
938
&decrypted_buffer);
991
939
if(decrypted_buffer_size >= 0){
992
940
993
941
written = 0;
1041
989
return retval;
1042
990
}
1043
991
1044
__attribute__((nonnull))
1045
992
static void resolve_callback(AvahiSServiceResolver *r,
1046
993
AvahiIfIndex interface,
1047
994
AvahiProtocol proto,
1055
1002
AVAHI_GCC_UNUSED AvahiStringList *txt,
1056
1003
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1057
1004
flags,
1058
void *mc){
1005
AVAHI_GCC_UNUSED void* userdata){
1059
1006
if(r == NULL){
1060
1007
return;
1061
1008
}
1073
1020
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1074
1021
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1075
1022
domain,
1076
avahi_strerror(avahi_server_errno
1077
(((mandos_context*)mc)->server)));
1023
avahi_strerror(avahi_server_errno(mc.server)));
1078
1024
break;
1079
1025
1080
1026
case AVAHI_RESOLVER_FOUND:
1088
1034
}
1089
1035
int ret = start_mandos_communication(ip, (in_port_t)port,
1090
1036
interface,
1091
avahi_proto_to_af(proto),
1092
mc);
1037
avahi_proto_to_af(proto));
1093
1038
if(ret == 0){
1094
1039
avahi_simple_poll_quit(simple_poll);
1095
1040
} else {
1096
1041
if(not add_server(ip, (in_port_t)port, interface,
1097
avahi_proto_to_af(proto),
1098
&((mandos_context*)mc)->current_server)){
1042
avahi_proto_to_af(proto))){
1099
1043
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1100
1044
" list\n", name);
1101
1045
}
1114
1058
const char *domain,
1115
1059
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1116
1060
flags,
1117
void *mc){
1061
AVAHI_GCC_UNUSED void* userdata){
1118
1062
if(b == NULL){
1119
1063
return;
1120
1064
}
1131
1075
case AVAHI_BROWSER_FAILURE:
1132
1076
1133
1077
fprintf_plus(stderr, "(Avahi browser) %s\n",
1134
avahi_strerror(avahi_server_errno
1135
(((mandos_context*)mc)->server)));
1078
avahi_strerror(avahi_server_errno(mc.server)));
1136
1079
avahi_simple_poll_quit(simple_poll);
1137
1080
return;
1138
1081
1142
1085
the callback function is called the Avahi server will free the
1143
1086
resolver for us. */
1144
1087
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)
1088
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1089
name, type, domain, protocol, 0,
1090
resolve_callback, NULL) == NULL)
1149
1091
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1150
1092
" %s\n", name,
1151
avahi_strerror(avahi_server_errno
1152
(((mandos_context*)mc)->server)));
1093
avahi_strerror(avahi_server_errno(mc.server)));
1153
1094
break;
1154
1095
1155
1096
case AVAHI_BROWSER_REMOVE:
1180
1121
errno = old_errno;
1181
1122
}
1182
1123
1183
__attribute__((nonnull, warn_unused_result))
1184
1124
bool get_flags(const char *ifname, struct ifreq *ifr){
1185
1125
int ret;
1186
1126
error_t ret_errno;
1205
1145
return true;
1206
1146
}
1207
1147
1208
__attribute__((nonnull, warn_unused_result))
1209
1148
bool good_flags(const char *ifname, const struct ifreq *ifr){
1210
1149
1211
1150
/* Reject the loopback device */
1253
1192
* corresponds to an acceptable network device.
1254
1193
* (This function is passed to scandir(3) as a filter function.)
1255
1194
*/
1256
__attribute__((nonnull, warn_unused_result))
1257
1195
int good_interface(const struct dirent *if_entry){
1258
1196
if(if_entry->d_name[0] == '.'){
1259
1197
return 0;
1277
1215
/*
1278
1216
* This function determines if a network interface is up.
1279
1217
*/
1280
__attribute__((nonnull, warn_unused_result))
1281
1218
bool interface_is_up(const char *interface){
1282
1219
struct ifreq ifr;
1283
1220
if(not get_flags(interface, &ifr)){
1294
1231
/*
1295
1232
* This function determines if a network interface is running
1296
1233
*/
1297
__attribute__((nonnull, warn_unused_result))
1298
1234
bool interface_is_running(const char *interface){
1299
1235
struct ifreq ifr;
1300
1236
if(not get_flags(interface, &ifr)){
1308
1244
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1309
1245
}
1310
1246
1311
__attribute__((nonnull, pure, warn_unused_result))
1312
1247
int notdotentries(const struct dirent *direntry){
1313
1248
/* Skip "." and ".." */
1314
1249
if(direntry->d_name[0] == '.'
1321
1256
}
1322
1257
1323
1258
/* Is this directory entry a runnable program? */
1324
__attribute__((nonnull, warn_unused_result))
1325
1259
int runnable_hook(const struct dirent *direntry){
1326
1260
int ret;
1327
1261
size_t sret;
1335
1269
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1336
1270
"abcdefghijklmnopqrstuvwxyz"
1337
1271
"0123456789"
1338
"_.-");
1272
"_-");
1339
1273
if((direntry->d_name)[sret] != '\0'){
1340
1274
/* Contains non-allowed characters */
1341
1275
if(debug){
1359
1293
}
1360
1294
return 0;
1361
1295
}
1362
free(fullname);
1363
1296
if(not (S_ISREG(st.st_mode))){
1364
1297
/* Not a regular file */
1365
1298
if(debug){
1383
1316
return 1;
1384
1317
}
1385
1318
1386
__attribute__((nonnull, warn_unused_result))
1387
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1388
mandos_context *mc){
1319
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1389
1320
int ret;
1390
1321
struct timespec now;
1391
1322
struct timespec waited_time;
1392
1323
intmax_t block_time;
1393
1324
1394
1325
while(true){
1395
if(mc->current_server == NULL){
1396
if(debug){
1326
if(mc.current_server == NULL){
1327
if (debug){
1397
1328
fprintf_plus(stderr, "Wait until first server is found."
1398
1329
" No timeout!\n");
1399
1330
}
1400
1331
ret = avahi_simple_poll_iterate(s, -1);
1401
1332
} else {
1402
if(debug){
1333
if (debug){
1403
1334
fprintf_plus(stderr, "Check current_server if we should run"
1404
1335
" it, or wait\n");
1405
1336
}
1412
1343
/* Calculating in ms how long time between now and server
1413
1344
who we visted longest time ago. Now - last seen. */
1414
1345
waited_time.tv_sec = (now.tv_sec
1415
- mc->current_server->last_seen.tv_sec);
1346
- mc.current_server->last_seen.tv_sec);
1416
1347
waited_time.tv_nsec = (now.tv_nsec
1417
- mc->current_server->last_seen.tv_nsec);
1348
- mc.current_server->last_seen.tv_nsec);
1418
1349
/* total time is 10s/10,000ms.
1419
1350
Converting to s from ms by dividing by 1,000,
1420
1351
and ns to ms by dividing by 1,000,000. */
1422
1353
- ((intmax_t)waited_time.tv_sec * 1000))
1423
1354
- ((intmax_t)waited_time.tv_nsec / 1000000));
1424
1355
1425
if(debug){
1356
if (debug){
1426
1357
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1427
1358
block_time);
1428
1359
}
1429
1360
1430
1361
if(block_time <= 0){
1431
ret = start_mandos_communication(mc->current_server->ip,
1432
mc->current_server->port,
1433
mc->current_server->if_index,
1434
mc->current_server->af, mc);
1362
ret = start_mandos_communication(mc.current_server->ip,
1363
mc.current_server->port,
1364
mc.current_server->if_index,
1365
mc.current_server->af);
1435
1366
if(ret == 0){
1436
avahi_simple_poll_quit(s);
1367
avahi_simple_poll_quit(simple_poll);
1437
1368
return 0;
1438
1369
}
1439
1370
ret = clock_gettime(CLOCK_MONOTONIC,
1440
&mc->current_server->last_seen);
1371
&mc.current_server->last_seen);
1441
1372
if(ret == -1){
1442
1373
perror_plus("clock_gettime");
1443
1374
return -1;
1444
1375
}
1445
mc->current_server = mc->current_server->next;
1376
mc.current_server = mc.current_server->next;
1446
1377
block_time = 0; /* Call avahi to find new Mandos
1447
1378
servers, but don't block */
1448
1379
}
1450
1381
ret = avahi_simple_poll_iterate(s, (int)block_time);
1451
1382
}
1452
1383
if(ret != 0){
1453
if(ret > 0 or errno != EINTR){
1384
if (ret > 0 or errno != EINTR){
1454
1385
return (ret != 1) ? ret : 0;
1455
1386
}
1456
1387
}
1458
1389
}
1459
1390
1460
1391
/* Set effective uid to 0, return errno */
1461
__attribute__((warn_unused_result))
1462
1392
error_t raise_privileges(void){
1463
1393
error_t old_errno = errno;
1464
1394
error_t ret_errno = 0;
1471
1401
}
1472
1402
1473
1403
/* Set effective and real user ID to 0. Return errno. */
1474
__attribute__((warn_unused_result))
1475
1404
error_t raise_privileges_permanently(void){
1476
1405
error_t old_errno = errno;
1477
1406
error_t ret_errno = raise_privileges();
1488
1417
}
1489
1418
1490
1419
/* Set effective user ID to unprivileged saved user ID */
1491
__attribute__((warn_unused_result))
1492
1420
error_t lower_privileges(void){
1493
1421
error_t old_errno = errno;
1494
1422
error_t ret_errno = 0;
1501
1429
}
1502
1430
1503
1431
/* Lower privileges permanently */
1504
__attribute__((warn_unused_result))
1505
1432
error_t lower_privileges_permanently(void){
1506
1433
error_t old_errno = errno;
1507
1434
error_t ret_errno = 0;
1513
1440
return ret_errno;
1514
1441
}
1515
1442
1516
__attribute__((nonnull))
1517
void run_network_hooks(const char *mode, const char *interface,
1443
bool run_network_hooks(const char *mode, const char *interface,
1518
1444
const float delay){
1519
1445
struct dirent **direntries;
1446
struct dirent *direntry;
1447
int ret;
1520
1448
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1521
1449
alphasort);
1522
1450
if(numhooks == -1){
1529
1457
perror_plus("scandir");
1530
1458
}
1531
1459
} else {
1532
struct dirent *direntry;
1533
int ret;
1534
1460
int devnull = open("/dev/null", O_RDONLY);
1535
1461
for(int i = 0; i < numhooks; i++){
1536
1462
direntry = direntries[i];
1548
1474
if(hook_pid == 0){
1549
1475
/* Child */
1550
1476
/* Raise privileges */
1551
if(raise_privileges_permanently() != 0){
1552
perror_plus("Failed to raise privileges");
1553
_exit(EX_NOPERM);
1554
}
1477
raise_privileges_permanently();
1555
1478
/* Set group */
1556
1479
errno = 0;
1557
1480
ret = setgid(0);
1558
1481
if(ret == -1){
1559
1482
perror_plus("setgid");
1560
_exit(EX_NOPERM);
1561
1483
}
1562
1484
/* Reset supplementary groups */
1563
1485
errno = 0;
1564
1486
ret = setgroups(0, NULL);
1565
1487
if(ret == -1){
1566
1488
perror_plus("setgroups");
1567
_exit(EX_NOPERM);
1568
}
1569
ret = dup2(devnull, STDIN_FILENO);
1570
if(ret == -1){
1571
perror_plus("dup2(devnull, STDIN_FILENO)");
1572
_exit(EX_OSERR);
1573
}
1574
ret = close(devnull);
1575
if(ret == -1){
1576
perror_plus("close");
1577
_exit(EX_OSERR);
1578
}
1579
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1580
if(ret == -1){
1581
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1582
_exit(EX_OSERR);
1583
}
1489
}
1490
dup2(devnull, STDIN_FILENO);
1491
close(devnull);
1492
dup2(STDERR_FILENO, STDOUT_FILENO);
1584
1493
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1585
1494
if(ret == -1){
1586
1495
perror_plus("setenv");
1602
1511
_exit(EX_OSERR);
1603
1512
}
1604
1513
char *delaystring;
1605
ret = asprintf(&delaystring, "%f", (double)delay);
1514
ret = asprintf(&delaystring, "%f", delay);
1606
1515
if(ret == -1){
1607
1516
perror_plus("asprintf");
1608
1517
_exit(EX_OSERR);
1661
1570
}
1662
1571
close(devnull);
1663
1572
}
1573
return true;
1664
1574
}
1665
1575
1666
__attribute__((nonnull, warn_unused_result))
1667
1576
error_t bring_up_interface(const char *const interface,
1668
1577
const float delay){
1578
int sd = -1;
1669
1579
error_t old_errno = errno;
1670
int ret;
1580
error_t ret_errno = 0;
1581
int ret, ret_setflags;
1671
1582
struct ifreq network;
1672
1583
unsigned int if_index = if_nametoindex(interface);
1673
1584
if(if_index == 0){
1682
1593
}
1683
1594
1684
1595
if(not interface_is_up(interface)){
1685
error_t ret_errno = 0, ioctl_errno = 0;
1686
if(not get_flags(interface, &network)){
1596
if(not get_flags(interface, &network) and debug){
1687
1597
ret_errno = errno;
1688
1598
fprintf_plus(stderr, "Failed to get flags for interface "
1689
1599
"\"%s\"\n", interface);
1690
errno = old_errno;
1691
1600
return ret_errno;
1692
1601
}
1693
network.ifr_flags |= IFF_UP; /* set flag */
1602
network.ifr_flags |= IFF_UP;
1694
1603
1695
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1696
if(sd == -1){
1604
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1605
if(sd < 0){
1697
1606
ret_errno = errno;
1698
1607
perror_plus("socket");
1699
1608
errno = old_errno;
1700
1609
return ret_errno;
1701
1610
}
1702
1611
1703
1612
if(quit_now){
1704
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1705
if(ret == -1){
1706
perror_plus("close");
1707
}
1613
close(sd);
1708
1614
errno = old_errno;
1709
1615
return EINTR;
1710
1616
}
1714
1620
interface);
1715
1621
}
1716
1622
1717
/* Raise privileges */
1718
ret_errno = raise_privileges();
1719
if(ret_errno != 0){
1720
perror_plus("Failed to raise privileges");
1721
}
1623
/* Raise priviliges */
1624
raise_privileges();
1722
1625
1723
1626
#ifdef __linux__
1724
int ret_linux;
1725
bool restore_loglevel = false;
1726
if(ret_errno == 0){
1727
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1728
messages about the network interface to mess up the prompt */
1729
ret_linux = klogctl(8, NULL, 5);
1730
if(ret_linux == -1){
1731
perror_plus("klogctl");
1732
} else {
1733
restore_loglevel = true;
1734
}
1627
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1628
messages about the network interface to mess up the prompt */
1629
int ret_linux = klogctl(8, NULL, 5);
1630
bool restore_loglevel = true;
1631
if(ret_linux == -1){
1632
restore_loglevel = false;
1633
perror_plus("klogctl");
1735
1634
}
1736
1635
#endif /* __linux__ */
1737
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1738
ioctl_errno = errno;
1636
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1637
ret_errno = errno;
1739
1638
#ifdef __linux__
1740
1639
if(restore_loglevel){
1741
1640
ret_linux = klogctl(7, NULL, 0);
1745
1644
}
1746
1645
#endif /* __linux__ */
1747
1646
1748
/* If raise_privileges() succeeded above */
1749
if(ret_errno == 0){
1750
/* Lower privileges */
1751
ret_errno = lower_privileges();
1752
if(ret_errno != 0){
1753
errno = ret_errno;
1754
perror_plus("Failed to lower privileges");
1755
}
1756
}
1647
/* Lower privileges */
1648
lower_privileges();
1757
1649
1758
1650
/* Close the socket */
1759
1651
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1762
1654
}
1763
1655
1764
1656
if(ret_setflags == -1){
1765
errno = ioctl_errno;
1657
errno = ret_errno;
1766
1658
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1767
1659
errno = old_errno;
1768
return ioctl_errno;
1660
return ret_errno;
1769
1661
}
1770
1662
} else if(debug){
1771
1663
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1789
1681
return 0;
1790
1682
}
1791
1683
1792
__attribute__((nonnull, warn_unused_result))
1793
1684
error_t take_down_interface(const char *const interface){
1685
int sd = -1;
1794
1686
error_t old_errno = errno;
1687
error_t ret_errno = 0;
1688
int ret, ret_setflags;
1795
1689
struct ifreq network;
1796
1690
unsigned int if_index = if_nametoindex(interface);
1797
1691
if(if_index == 0){
1800
1694
return ENXIO;
1801
1695
}
1802
1696
if(interface_is_up(interface)){
1803
error_t ret_errno = 0, ioctl_errno = 0;
1804
1697
if(not get_flags(interface, &network) and debug){
1805
1698
ret_errno = errno;
1806
1699
fprintf_plus(stderr, "Failed to get flags for interface "
1807
1700
"\"%s\"\n", interface);
1808
errno = old_errno;
1809
1701
return ret_errno;
1810
1702
}
1811
1703
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1812
1704
1813
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1814
if(sd == -1){
1705
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1706
if(sd < 0){
1815
1707
ret_errno = errno;
1816
1708
perror_plus("socket");
1817
1709
errno = old_errno;
1823
1715
interface);
1824
1716
}
1825
1717
1826
/* Raise privileges */
1827
ret_errno = raise_privileges();
1828
if(ret_errno != 0){
1829
perror_plus("Failed to raise privileges");
1830
}
1831
1832
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1833
ioctl_errno = errno;
1834
1835
/* If raise_privileges() succeeded above */
1836
if(ret_errno == 0){
1837
/* Lower privileges */
1838
ret_errno = lower_privileges();
1839
if(ret_errno != 0){
1840
errno = ret_errno;
1841
perror_plus("Failed to lower privileges");
1842
}
1843
}
1718
/* Raise priviliges */
1719
raise_privileges();
1720
1721
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1722
ret_errno = errno;
1723
1724
/* Lower privileges */
1725
lower_privileges();
1844
1726
1845
1727
/* Close the socket */
1846
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1728
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1847
1729
if(ret == -1){
1848
1730
perror_plus("close");
1849
1731
}
1850
1732
1851
1733
if(ret_setflags == -1){
1852
errno = ioctl_errno;
1734
errno = ret_errno;
1853
1735
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1854
1736
errno = old_errno;
1855
return ioctl_errno;
1737
return ret_errno;
1856
1738
}
1857
1739
} else if(debug){
1858
1740
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1864
1746
}
1865
1747
1866
1748
int main(int argc, char *argv[]){
1867
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1868
.priority = "SECURE256:!CTYPE-X.509:"
1869
"+CTYPE-OPENPGP", .current_server = NULL,
1870
.interfaces = NULL, .interfaces_size = 0 };
1871
1749
AvahiSServiceBrowser *sb = NULL;
1872
1750
error_t ret_errno;
1873
1751
int ret;
1874
1752
intmax_t tmpmax;
1875
1753
char *tmp;
1876
1754
int exitcode = EXIT_SUCCESS;
1755
char *interfaces = NULL;
1756
size_t interfaces_size = 0;
1877
1757
char *interfaces_to_take_down = NULL;
1878
1758
size_t interfaces_to_take_down_size = 0;
1879
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1880
char old_tempdir[] = "/tmp/mandosXXXXXX";
1881
char *tempdir = NULL;
1759
char tempdir[] = "/tmp/mandosXXXXXX";
1760
bool tempdir_created = false;
1882
1761
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1883
1762
const char *seckey = PATHDIR "/" SECKEY;
1884
1763
const char *pubkey = PATHDIR "/" PUBKEY;
1885
1764
char *interfaces_hooks = NULL;
1765
size_t interfaces_hooks_size = 0;
1886
1766
1887
1767
bool gnutls_initialized = false;
1888
1768
bool gpgme_initialized = false;
1979
1859
connect_to = arg;
1980
1860
break;
1981
1861
case 'i': /* --interface */
1982
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1983
arg, (int)',');
1862
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1863
(int)',');
1984
1864
if(ret_errno != 0){
1985
1865
argp_error(state, "%s", strerror(ret_errno));
1986
1866
}
2066
1946
/* Work around Debian bug #633582:
2067
1947
<http://bugs.debian.org/633582> */
2068
1948
2069
/* Re-raise privileges */
2070
ret_errno = raise_privileges();
2071
if(ret_errno != 0){
2072
errno = ret_errno;
2073
perror_plus("Failed to raise privileges");
2074
} else {
1949
/* Re-raise priviliges */
1950
if(raise_privileges() == 0){
2075
1951
struct stat st;
2076
1952
2077
1953
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2117
1993
}
2118
1994
2119
1995
/* Lower privileges */
2120
ret_errno = lower_privileges();
2121
if(ret_errno != 0){
2122
errno = ret_errno;
2123
perror_plus("Failed to lower privileges");
1996
errno = 0;
1997
ret = seteuid(uid);
1998
if(ret == -1){
1999
perror_plus("seteuid");
2124
2000
}
2125
2001
}
2126
2002
}
2127
2003
2128
/* Remove invalid interface names (except "none") */
2004
/* Remove empty interface names */
2129
2005
{
2130
2006
char *interface = NULL;
2131
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2007
while((interface = argz_next(interfaces, interfaces_size,
2132
2008
interface))){
2133
if(strcmp(interface, "none") != 0
2134
and if_nametoindex(interface) == 0){
2135
if(interface[0] != '\0'){
2009
if(if_nametoindex(interface) == 0){
2010
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2136
2011
fprintf_plus(stderr, "Not using nonexisting interface"
2137
2012
" \"%s\"\n", interface);
2138
2013
}
2139
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2014
argz_delete(&interfaces, &interfaces_size, interface);
2140
2015
interface = NULL;
2141
2016
}
2142
2017
}
2144
2019
2145
2020
/* Run network hooks */
2146
2021
{
2147
if(mc.interfaces != NULL){
2148
interfaces_hooks = malloc(mc.interfaces_size);
2022
2023
if(interfaces != NULL){
2024
interfaces_hooks = malloc(interfaces_size);
2149
2025
if(interfaces_hooks == NULL){
2150
2026
perror_plus("malloc");
2151
2027
goto end;
2152
2028
}
2153
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2154
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2155
}
2156
run_network_hooks("start", interfaces_hooks != NULL ?
2157
interfaces_hooks : "", delay);
2029
memcpy(interfaces_hooks, interfaces, interfaces_size);
2030
interfaces_hooks_size = interfaces_size;
2031
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2032
(int)',');
2033
}
2034
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2035
interfaces_hooks : "", delay)){
2036
goto end;
2037
}
2158
2038
}
2159
2039
2160
2040
if(not debug){
2237
2117
}
2238
2118
2239
2119
/* If no interfaces were specified, make a list */
2240
if(mc.interfaces == NULL){
2120
if(interfaces == NULL){
2241
2121
struct dirent **direntries;
2242
2122
/* Look for any good interfaces */
2243
2123
ret = scandir(sys_class_net, &direntries, good_interface,
2245
2125
if(ret >= 1){
2246
2126
/* Add all found interfaces to interfaces list */
2247
2127
for(int i = 0; i < ret; ++i){
2248
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2128
ret_errno = argz_add(&interfaces, &interfaces_size,
2249
2129
direntries[i]->d_name);
2250
2130
if(ret_errno != 0){
2251
errno = ret_errno;
2252
2131
perror_plus("argz_add");
2253
2132
continue;
2254
2133
}
2266
2145
}
2267
2146
}
2268
2147
2269
/* Bring up interfaces which are down, and remove any "none"s */
2270
{
2148
/* If we only got one interface, explicitly use only that one */
2149
if(argz_count(interfaces, interfaces_size) == 1){
2150
if(debug){
2151
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2152
interfaces);
2153
}
2154
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2155
}
2156
2157
/* Bring up interfaces which are down */
2158
if(not (argz_count(interfaces, interfaces_size) == 1
2159
and strcmp(interfaces, "none") == 0)){
2271
2160
char *interface = NULL;
2272
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2161
while((interface = argz_next(interfaces, interfaces_size,
2273
2162
interface))){
2274
/* If interface name is "none", stop bringing up interfaces.
2275
Also remove all instances of "none" from the list */
2276
if(strcmp(interface, "none") == 0){
2277
argz_delete(&mc.interfaces, &mc.interfaces_size,
2278
interface);
2279
interface = NULL;
2280
while((interface = argz_next(mc.interfaces,
2281
mc.interfaces_size, interface))){
2282
if(strcmp(interface, "none") == 0){
2283
argz_delete(&mc.interfaces, &mc.interfaces_size,
2284
interface);
2285
interface = NULL;
2286
}
2287
}
2288
break;
2289
}
2290
2163
bool interface_was_up = interface_is_up(interface);
2291
errno = bring_up_interface(interface, delay);
2164
ret = bring_up_interface(interface, delay);
2292
2165
if(not interface_was_up){
2293
if(errno != 0){
2166
if(ret != 0){
2167
errno = ret;
2294
2168
perror_plus("Failed to bring up interface");
2295
2169
} else {
2296
errno = argz_add(&interfaces_to_take_down,
2297
&interfaces_to_take_down_size,
2298
interface);
2299
if(errno != 0){
2300
perror_plus("argz_add");
2301
}
2170
ret_errno = argz_add(&interfaces_to_take_down,
2171
&interfaces_to_take_down_size,
2172
interface);
2302
2173
}
2303
2174
}
2304
2175
}
2176
free(interfaces);
2177
interfaces = NULL;
2178
interfaces_size = 0;
2305
2179
if(debug and (interfaces_to_take_down == NULL)){
2306
2180
fprintf_plus(stderr, "No interfaces were brought up\n");
2307
2181
}
2308
2182
}
2309
2183
2310
/* If we only got one interface, explicitly use only that one */
2311
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2312
if(debug){
2313
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2314
mc.interfaces);
2315
}
2316
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2317
}
2318
2319
2184
if(quit_now){
2320
2185
goto end;
2321
2186
}
2322
2187
2323
ret = init_gnutls_global(pubkey, seckey, &mc);
2188
ret = init_gnutls_global(pubkey, seckey);
2324
2189
if(ret == -1){
2325
2190
fprintf_plus(stderr, "init_gnutls_global failed\n");
2326
2191
exitcode = EX_UNAVAILABLE;
2333
2198
goto end;
2334
2199
}
2335
2200
2336
/* Try /run/tmp before /tmp */
2337
tempdir = mkdtemp(run_tempdir);
2338
if(tempdir == NULL and errno == ENOENT){
2339
if(debug){
2340
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2341
run_tempdir, old_tempdir);
2342
}
2343
tempdir = mkdtemp(old_tempdir);
2344
}
2345
if(tempdir == NULL){
2201
if(mkdtemp(tempdir) == NULL){
2346
2202
perror_plus("mkdtemp");
2347
2203
goto end;
2348
2204
}
2205
tempdir_created = true;
2349
2206
2350
2207
if(quit_now){
2351
2208
goto end;
2352
2209
}
2353
2210
2354
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2211
if(not init_gpgme(pubkey, seckey, tempdir)){
2355
2212
fprintf_plus(stderr, "init_gpgme failed\n");
2356
2213
exitcode = EX_UNAVAILABLE;
2357
2214
goto end;
2387
2244
exitcode = EX_USAGE;
2388
2245
goto end;
2389
2246
}
2390
2247
2391
2248
if(quit_now){
2392
2249
goto end;
2393
2250
}
2414
2271
}
2415
2272
2416
2273
while(not quit_now){
2417
ret = start_mandos_communication(address, port, if_index, af,
2418
&mc);
2274
ret = start_mandos_communication(address, port, if_index, af);
2419
2275
if(quit_now or ret == 0){
2420
2276
break;
2421
2277
}
2423
2279
fprintf_plus(stderr, "Retrying in %d seconds\n",
2424
2280
(int)retry_interval);
2425
2281
}
2426
sleep((unsigned int)retry_interval);
2282
sleep((int)retry_interval);
2427
2283
}
2428
2284
2429
if(not quit_now){
2285
if (not quit_now){
2430
2286
exitcode = EXIT_SUCCESS;
2431
2287
}
2432
2288
2469
2325
/* Create the Avahi service browser */
2470
2326
sb = avahi_s_service_browser_new(mc.server, if_index,
2471
2327
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2472
NULL, 0, browse_callback,
2473
(void *)&mc);
2328
NULL, 0, browse_callback, NULL);
2474
2329
if(sb == NULL){
2475
2330
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2476
2331
avahi_strerror(avahi_server_errno(mc.server)));
2487
2342
if(debug){
2488
2343
fprintf_plus(stderr, "Starting Avahi loop search\n");
2489
2344
}
2490
2345
2491
2346
ret = avahi_loop_with_timeout(simple_poll,
2492
(int)(retry_interval * 1000), &mc);
2347
(int)(retry_interval * 1000));
2493
2348
if(debug){
2494
2349
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2495
2350
(ret == 0) ? "successfully" : "with error");
2502
2357
}
2503
2358
2504
2359
/* Cleanup things */
2505
free(mc.interfaces);
2506
2507
2360
if(sb != NULL)
2508
2361
avahi_s_service_browser_free(sb);
2509
2362
2534
2387
}
2535
2388
}
2536
2389
2537
/* Re-raise privileges */
2390
/* Re-raise priviliges */
2538
2391
{
2539
ret_errno = raise_privileges();
2540
if(ret_errno != 0){
2541
perror_plus("Failed to raise privileges");
2542
} else {
2543
2544
/* Run network hooks */
2545
run_network_hooks("stop", interfaces_hooks != NULL ?
2546
interfaces_hooks : "", delay);
2547
2548
/* Take down the network interfaces which were brought up */
2549
{
2550
char *interface = NULL;
2551
while((interface=argz_next(interfaces_to_take_down,
2552
interfaces_to_take_down_size,
2553
interface))){
2554
ret_errno = take_down_interface(interface);
2555
if(ret_errno != 0){
2556
errno = ret_errno;
2557
perror_plus("Failed to take down interface");
2558
}
2559
}
2560
if(debug and (interfaces_to_take_down == NULL)){
2561
fprintf_plus(stderr, "No interfaces needed to be taken"
2562
" down\n");
2563
}
2564
}
2565
}
2566
2567
ret_errno = lower_privileges_permanently();
2568
if(ret_errno != 0){
2569
perror_plus("Failed to lower privileges permanently");
2570
}
2392
raise_privileges();
2393
2394
/* Run network hooks */
2395
run_network_hooks("stop", interfaces_hooks != NULL ?
2396
interfaces_hooks : "", delay);
2397
2398
/* Take down the network interfaces which were brought up */
2399
{
2400
char *interface = NULL;
2401
while((interface=argz_next(interfaces_to_take_down,
2402
interfaces_to_take_down_size,
2403
interface))){
2404
ret_errno = take_down_interface(interface);
2405
if(ret_errno != 0){
2406
errno = ret_errno;
2407
perror_plus("Failed to take down interface");
2408
}
2409
}
2410
if(debug and (interfaces_to_take_down == NULL)){
2411
fprintf_plus(stderr, "No interfaces needed to be taken"
2412
" down\n");
2413
}
2414
}
2415
2416
lower_privileges_permanently();
2571
2417
}
2572
2418
2573
2419
free(interfaces_to_take_down);
2574
2420
free(interfaces_hooks);
2575
2421
2576
2422
/* Removes the GPGME temp directory and all files inside */
2577
if(tempdir != NULL){
2423
if(tempdir_created){
2578
2424
struct dirent **direntries = NULL;
2579
2425
struct dirent *direntry = NULL;
2580
2426
int numentries = scandir(tempdir, &direntries, notdotentries,
2581
2427
alphasort);
2582
if(numentries > 0){
2428
if (numentries > 0){
2583
2429
for(int i = 0; i < numentries; i++){
2584
2430
direntry = direntries[i];
2585
2431
char *fullname = NULL;
2597
2443
free(fullname);
2598
2444
}
2599
2445
}
2600
2446
2601
2447
/* need to clean even if 0 because man page doesn't specify */
2602
2448
free(direntries);
2603
if(numentries == -1){
2449
if (numentries == -1){
2604
2450
perror_plus("scandir");
2605
2451
}
2606
2452
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0