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237.7.226
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: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2014-03-28 22:32:21 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 311.
- Revision ID: teddy@recompile.se-20140328223221-w579qlvlex5if3dn
Fix location and format of signing key file.
* debian/upstream/signing-key.asc: Added.
* debian/upstream-signing-key.pgp: Removed.
* debian/upstream/signing-key.asc: Added.
* debian/upstream-signing-key.pgp: Removed.
- files added:
- 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 © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 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() */
58
inet_pton(), connect(),
59
getnameinfo() */
59
60
#include <fcntl.h> /* open() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
76
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
91
92
argz_delete(), argz_append(),
92
93
argz_stringify(), argz_add(),
93
94
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
94
97
95
98
#ifdef __linux__
96
99
#include <sys/klog.h> /* klogctl() */
133
136
134
137
bool debug = false;
135
138
static const char mandos_protocol_version[] = "1";
136
const char *argp_program_version = "mandos-client " VERSION;
137
const char *argp_program_bug_address = "<mandos@recompile.se>";
139
const char * argp_program_version = "mandos-client " VERSION;
140
const char * argp_program_bug_address = "<mandos@recompile.se>";
138
141
static const char sys_class_net[] = "/sys/class/net";
139
142
char *connect_to = NULL;
140
143
const char *hookdir = HOOKDIR;
154
157
155
158
/* Used for passing in values through the Avahi callback functions */
156
159
typedef struct {
157
AvahiSimplePoll *simple_poll;
158
160
AvahiServer *server;
159
161
gnutls_certificate_credentials_t cred;
160
162
unsigned int dh_bits;
162
164
const char *priority;
163
165
gpgme_ctx_t ctx;
164
166
server *current_server;
167
char *interfaces;
168
size_t interfaces_size;
165
169
} mandos_context;
166
170
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 };
171
/* global so signal handler can reach it*/
172
AvahiSimplePoll *simple_poll;
172
173
173
174
sig_atomic_t quit_now = 0;
174
175
int signal_received = 0;
182
183
perror(print_text);
183
184
}
184
185
185
__attribute__((format (gnu_printf, 2, 3)))
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
186
187
int fprintf_plus(FILE *stream, const char *format, ...){
187
188
va_list ap;
188
189
va_start (ap, format);
189
190
190
191
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
191
192
program_invocation_short_name));
192
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
194
}
194
195
195
196
/*
197
198
* bytes. "buffer_capacity" is how much is currently allocated,
198
199
* "buffer_length" is how much is already used.
199
200
*/
201
__attribute__((nonnull, warn_unused_result))
200
202
size_t incbuffer(char **buffer, size_t buffer_length,
201
203
size_t buffer_capacity){
202
204
if(buffer_length + BUFFER_SIZE > buffer_capacity){
203
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
204
if(buffer == NULL){
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;
205
211
return 0;
206
212
}
213
*buffer = new_buf;
207
214
buffer_capacity += BUFFER_SIZE;
208
215
}
209
216
return buffer_capacity;
210
217
}
211
218
212
219
/* Add server to set of servers to retry periodically */
220
__attribute__((nonnull, warn_unused_result))
213
221
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
214
int af){
222
int af, server **current_server){
215
223
int ret;
216
224
server *new_server = malloc(sizeof(server));
217
225
if(new_server == NULL){
226
234
perror_plus("strdup");
227
235
return false;
228
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
229
242
/* Special case of first server */
230
if (mc.current_server == NULL){
243
if(*current_server == NULL){
231
244
new_server->next = new_server;
232
245
new_server->prev = new_server;
233
mc.current_server = new_server;
234
/* Place the new server last in the list */
246
*current_server = new_server;
235
247
} else {
236
new_server->next = mc.current_server;
237
new_server->prev = mc.current_server->prev;
248
/* Place the new server last in the list */
249
new_server->next = *current_server;
250
new_server->prev = (*current_server)->prev;
238
251
new_server->prev->next = 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;
252
(*current_server)->prev = new_server;
245
253
}
246
254
return true;
247
255
}
249
257
/*
250
258
* Initialize GPGME.
251
259
*/
252
static bool init_gpgme(const char *seckey, const char *pubkey,
253
const char *tempdir){
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){
254
265
gpgme_error_t rc;
255
266
gpgme_engine_info_t engine_info;
256
267
257
258
268
/*
259
269
* Helper function to insert pub and seckey to the engine keyring.
260
270
*/
261
bool import_key(const char *filename){
271
bool import_key(const char * const filename){
262
272
int ret;
263
273
int fd;
264
274
gpgme_data_t pgp_data;
276
286
return false;
277
287
}
278
288
279
rc = gpgme_op_import(mc.ctx, pgp_data);
289
rc = gpgme_op_import(mc->ctx, pgp_data);
280
290
if(rc != GPG_ERR_NO_ERROR){
281
291
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
282
292
gpgme_strsource(rc), gpgme_strerror(rc));
326
336
}
327
337
328
338
/* Create new GPGME "context" */
329
rc = gpgme_new(&(mc.ctx));
339
rc = gpgme_new(&(mc->ctx));
330
340
if(rc != GPG_ERR_NO_ERROR){
331
341
fprintf_plus(stderr, "Mandos plugin mandos-client: "
332
342
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
345
355
* Decrypt OpenPGP data.
346
356
* Returns -1 on error
347
357
*/
358
__attribute__((nonnull, warn_unused_result))
348
359
static ssize_t pgp_packet_decrypt(const char *cryptotext,
349
360
size_t crypto_size,
350
char **plaintext){
361
char **plaintext,
362
mandos_context *mc){
351
363
gpgme_data_t dh_crypto, dh_plain;
352
364
gpgme_error_t rc;
353
365
ssize_t ret;
379
391
380
392
/* Decrypt data from the cryptotext data buffer to the plaintext
381
393
data buffer */
382
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
394
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
383
395
if(rc != GPG_ERR_NO_ERROR){
384
396
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
385
397
gpgme_strsource(rc), gpgme_strerror(rc));
386
398
plaintext_length = -1;
387
399
if(debug){
388
400
gpgme_decrypt_result_t result;
389
result = gpgme_op_decrypt_result(mc.ctx);
401
result = gpgme_op_decrypt_result(mc->ctx);
390
402
if(result == NULL){
391
403
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
392
404
} else {
469
481
return plaintext_length;
470
482
}
471
483
472
static const char * safer_gnutls_strerror(int value){
484
__attribute__((warn_unused_result))
485
static const char *safer_gnutls_strerror(int value){
473
486
const char *ret = gnutls_strerror(value);
474
487
if(ret == NULL)
475
488
ret = "(unknown)";
477
490
}
478
491
479
492
/* GnuTLS log function callback */
493
__attribute__((nonnull))
480
494
static void debuggnutls(__attribute__((unused)) int level,
481
495
const char* string){
482
496
fprintf_plus(stderr, "GnuTLS: %s", string);
483
497
}
484
498
499
__attribute__((nonnull, warn_unused_result))
485
500
static int init_gnutls_global(const char *pubkeyfilename,
486
const char *seckeyfilename){
501
const char *seckeyfilename,
502
mandos_context *mc){
487
503
int ret;
488
504
489
505
if(debug){
506
522
}
507
523
508
524
/* OpenPGP credentials */
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
525
ret = gnutls_certificate_allocate_credentials(&mc->cred);
510
526
if(ret != GNUTLS_E_SUCCESS){
511
527
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
512
528
safer_gnutls_strerror(ret));
522
538
}
523
539
524
540
ret = gnutls_certificate_set_openpgp_key_file
525
(mc.cred, pubkeyfilename, seckeyfilename,
541
(mc->cred, pubkeyfilename, seckeyfilename,
526
542
GNUTLS_OPENPGP_FMT_BASE64);
527
543
if(ret != GNUTLS_E_SUCCESS){
528
544
fprintf_plus(stderr,
534
550
}
535
551
536
552
/* GnuTLS server initialization */
537
ret = gnutls_dh_params_init(&mc.dh_params);
553
ret = gnutls_dh_params_init(&mc->dh_params);
538
554
if(ret != GNUTLS_E_SUCCESS){
539
555
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
540
556
" initialization: %s\n",
541
557
safer_gnutls_strerror(ret));
542
558
goto globalfail;
543
559
}
544
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
560
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
545
561
if(ret != GNUTLS_E_SUCCESS){
546
562
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
563
safer_gnutls_strerror(ret));
548
564
goto globalfail;
549
565
}
550
566
551
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
567
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
552
568
553
569
return 0;
554
570
555
571
globalfail:
556
572
557
gnutls_certificate_free_credentials(mc.cred);
573
gnutls_certificate_free_credentials(mc->cred);
558
574
gnutls_global_deinit();
559
gnutls_dh_params_deinit(mc.dh_params);
575
gnutls_dh_params_deinit(mc->dh_params);
560
576
return -1;
561
577
}
562
578
563
static int init_gnutls_session(gnutls_session_t *session){
579
__attribute__((nonnull, warn_unused_result))
580
static int init_gnutls_session(gnutls_session_t *session,
581
mandos_context *mc){
564
582
int ret;
565
583
/* GnuTLS session creation */
566
584
do {
578
596
{
579
597
const char *err;
580
598
do {
581
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
599
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
582
600
if(quit_now){
583
601
gnutls_deinit(*session);
584
602
return -1;
595
613
596
614
do {
597
615
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
mc.cred);
616
mc->cred);
599
617
if(quit_now){
600
618
gnutls_deinit(*session);
601
619
return -1;
611
629
/* ignore client certificate if any. */
612
630
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
631
614
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
632
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
615
633
616
634
return 0;
617
635
}
621
639
__attribute__((unused)) const char *txt){}
622
640
623
641
/* Called when a Mandos server is found */
642
__attribute__((nonnull, warn_unused_result))
624
643
static int start_mandos_communication(const char *ip, in_port_t port,
625
644
AvahiIfIndex if_index,
626
int af){
645
int af, mandos_context *mc){
627
646
int ret, tcp_sd = -1;
628
647
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
648
struct sockaddr_storage to;
633
649
char *buffer = NULL;
634
650
char *decrypted_buffer = NULL;
635
651
size_t buffer_length = 0;
659
675
return -1;
660
676
}
661
677
662
ret = init_gnutls_session(&session);
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);
663
711
if(ret != 0){
664
712
return -1;
665
713
}
684
732
685
733
memset(&to, 0, sizeof(to));
686
734
if(af == AF_INET6){
687
to.in6.sin6_family = (sa_family_t)af;
688
ret = inet_pton(af, ip, &to.in6.sin6_addr);
735
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
736
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
689
737
} else { /* IPv4 */
690
to.in.sin_family = (sa_family_t)af;
691
ret = inet_pton(af, ip, &to.in.sin_addr);
738
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
739
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
692
740
}
693
741
if(ret < 0 ){
694
742
int e = errno;
703
751
goto mandos_end;
704
752
}
705
753
if(af == AF_INET6){
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*/
754
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
755
if(IN6_IS_ADDR_LINKLOCAL
756
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
710
757
if(if_index == AVAHI_IF_UNSPEC){
711
758
fprintf_plus(stderr, "An IPv6 link-local address is"
712
759
" incomplete without a network interface\n");
714
761
goto mandos_end;
715
762
}
716
763
/* Set the network interface number as scope */
717
to.in6.sin6_scope_id = (uint32_t)if_index;
764
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
718
765
}
719
766
} else {
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
767
((struct sockaddr_in *)&to)->sin_port = htons(port);
723
768
}
724
769
725
770
if(quit_now){
742
787
}
743
788
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
789
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
746
790
if(af == AF_INET6){
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
791
ret = getnameinfo((struct sockaddr *)&to,
792
sizeof(struct sockaddr_in6),
793
addrstr, sizeof(addrstr), NULL, 0,
794
NI_NUMERICHOST);
749
795
} else {
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
752
800
}
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
}
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);
759
807
}
760
808
}
761
809
765
813
}
766
814
767
815
if(af == AF_INET6){
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
816
ret = connect(tcp_sd, (struct sockaddr *)&to,
817
sizeof(struct sockaddr_in6));
769
818
} else {
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
819
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
820
sizeof(struct sockaddr_in));
771
821
}
772
822
if(ret < 0){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
823
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
774
824
int e = errno;
775
825
perror_plus("connect");
776
826
errno = e;
937
987
if(buffer_length > 0){
938
988
ssize_t decrypted_buffer_size;
939
989
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
940
&decrypted_buffer);
990
&decrypted_buffer, mc);
941
991
if(decrypted_buffer_size >= 0){
942
992
943
993
written = 0;
991
1041
return retval;
992
1042
}
993
1043
1044
__attribute__((nonnull))
994
1045
static void resolve_callback(AvahiSServiceResolver *r,
995
1046
AvahiIfIndex interface,
996
1047
AvahiProtocol proto,
1004
1055
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
1056
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1057
flags,
1007
AVAHI_GCC_UNUSED void* userdata){
1058
void *mc){
1008
1059
if(r == NULL){
1009
1060
return;
1010
1061
}
1022
1073
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
1074
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
1075
domain,
1025
avahi_strerror(avahi_server_errno(mc.server)));
1076
avahi_strerror(avahi_server_errno
1077
(((mandos_context*)mc)->server)));
1026
1078
break;
1027
1079
1028
1080
case AVAHI_RESOLVER_FOUND:
1036
1088
}
1037
1089
int ret = start_mandos_communication(ip, (in_port_t)port,
1038
1090
interface,
1039
avahi_proto_to_af(proto));
1091
avahi_proto_to_af(proto),
1092
mc);
1040
1093
if(ret == 0){
1041
avahi_simple_poll_quit(mc.simple_poll);
1094
avahi_simple_poll_quit(simple_poll);
1042
1095
} else {
1043
1096
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto))){
1097
avahi_proto_to_af(proto),
1098
&((mandos_context*)mc)->current_server)){
1045
1099
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1046
1100
" list\n", name);
1047
1101
}
1060
1114
const char *domain,
1061
1115
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1116
flags,
1063
AVAHI_GCC_UNUSED void* userdata){
1117
void *mc){
1064
1118
if(b == NULL){
1065
1119
return;
1066
1120
}
1077
1131
case AVAHI_BROWSER_FAILURE:
1078
1132
1079
1133
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1134
avahi_strerror(avahi_server_errno
1135
(((mandos_context*)mc)->server)));
1136
avahi_simple_poll_quit(simple_poll);
1082
1137
return;
1083
1138
1084
1139
case AVAHI_BROWSER_NEW:
1087
1142
the callback function is called the Avahi server will free the
1088
1143
resolver for us. */
1089
1144
1090
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
name, type, domain, protocol, 0,
1092
resolve_callback, NULL) == NULL)
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)
1093
1149
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1094
1150
" %s\n", name,
1095
avahi_strerror(avahi_server_errno(mc.server)));
1151
avahi_strerror(avahi_server_errno
1152
(((mandos_context*)mc)->server)));
1096
1153
break;
1097
1154
1098
1155
case AVAHI_BROWSER_REMOVE:
1117
1174
signal_received = sig;
1118
1175
int old_errno = errno;
1119
1176
/* set main loop to exit */
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1177
if(simple_poll != NULL){
1178
avahi_simple_poll_quit(simple_poll);
1122
1179
}
1123
1180
errno = old_errno;
1124
1181
}
1125
1182
1183
__attribute__((nonnull, warn_unused_result))
1126
1184
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1185
int ret;
1128
1186
error_t ret_errno;
1147
1205
return true;
1148
1206
}
1149
1207
1208
__attribute__((nonnull, warn_unused_result))
1150
1209
bool good_flags(const char *ifname, const struct ifreq *ifr){
1151
1210
1152
1211
/* Reject the loopback device */
1194
1253
* corresponds to an acceptable network device.
1195
1254
* (This function is passed to scandir(3) as a filter function.)
1196
1255
*/
1256
__attribute__((nonnull, warn_unused_result))
1197
1257
int good_interface(const struct dirent *if_entry){
1198
1258
if(if_entry->d_name[0] == '.'){
1199
1259
return 0;
1217
1277
/*
1218
1278
* This function determines if a network interface is up.
1219
1279
*/
1280
__attribute__((nonnull, warn_unused_result))
1220
1281
bool interface_is_up(const char *interface){
1221
1282
struct ifreq ifr;
1222
1283
if(not get_flags(interface, &ifr)){
1233
1294
/*
1234
1295
* This function determines if a network interface is running
1235
1296
*/
1297
__attribute__((nonnull, warn_unused_result))
1236
1298
bool interface_is_running(const char *interface){
1237
1299
struct ifreq ifr;
1238
1300
if(not get_flags(interface, &ifr)){
1246
1308
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1247
1309
}
1248
1310
1311
__attribute__((nonnull, pure, warn_unused_result))
1249
1312
int notdotentries(const struct dirent *direntry){
1250
1313
/* Skip "." and ".." */
1251
1314
if(direntry->d_name[0] == '.'
1258
1321
}
1259
1322
1260
1323
/* Is this directory entry a runnable program? */
1324
__attribute__((nonnull, warn_unused_result))
1261
1325
int runnable_hook(const struct dirent *direntry){
1262
1326
int ret;
1263
1327
size_t sret;
1318
1382
return 1;
1319
1383
}
1320
1384
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1385
__attribute__((nonnull, warn_unused_result))
1386
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1387
mandos_context *mc){
1322
1388
int ret;
1323
1389
struct timespec now;
1324
1390
struct timespec waited_time;
1325
1391
intmax_t block_time;
1326
1392
1327
1393
while(true){
1328
if(mc.current_server == NULL){
1329
if (debug){
1394
if(mc->current_server == NULL){
1395
if(debug){
1330
1396
fprintf_plus(stderr, "Wait until first server is found."
1331
1397
" No timeout!\n");
1332
1398
}
1333
1399
ret = avahi_simple_poll_iterate(s, -1);
1334
1400
} else {
1335
if (debug){
1401
if(debug){
1336
1402
fprintf_plus(stderr, "Check current_server if we should run"
1337
1403
" it, or wait\n");
1338
1404
}
1345
1411
/* Calculating in ms how long time between now and server
1346
1412
who we visted longest time ago. Now - last seen. */
1347
1413
waited_time.tv_sec = (now.tv_sec
1348
- mc.current_server->last_seen.tv_sec);
1414
- mc->current_server->last_seen.tv_sec);
1349
1415
waited_time.tv_nsec = (now.tv_nsec
1350
- mc.current_server->last_seen.tv_nsec);
1416
- mc->current_server->last_seen.tv_nsec);
1351
1417
/* total time is 10s/10,000ms.
1352
1418
Converting to s from ms by dividing by 1,000,
1353
1419
and ns to ms by dividing by 1,000,000. */
1355
1421
- ((intmax_t)waited_time.tv_sec * 1000))
1356
1422
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1423
1358
if (debug){
1424
if(debug){
1359
1425
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
1426
block_time);
1361
1427
}
1362
1428
1363
1429
if(block_time <= 0){
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);
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);
1368
1434
if(ret == 0){
1369
avahi_simple_poll_quit(mc.simple_poll);
1435
avahi_simple_poll_quit(s);
1370
1436
return 0;
1371
1437
}
1372
1438
ret = clock_gettime(CLOCK_MONOTONIC,
1373
&mc.current_server->last_seen);
1439
&mc->current_server->last_seen);
1374
1440
if(ret == -1){
1375
1441
perror_plus("clock_gettime");
1376
1442
return -1;
1377
1443
}
1378
mc.current_server = mc.current_server->next;
1444
mc->current_server = mc->current_server->next;
1379
1445
block_time = 0; /* Call avahi to find new Mandos
1380
1446
servers, but don't block */
1381
1447
}
1383
1449
ret = avahi_simple_poll_iterate(s, (int)block_time);
1384
1450
}
1385
1451
if(ret != 0){
1386
if (ret > 0 or errno != EINTR){
1452
if(ret > 0 or errno != EINTR){
1387
1453
return (ret != 1) ? ret : 0;
1388
1454
}
1389
1455
}
1391
1457
}
1392
1458
1393
1459
/* Set effective uid to 0, return errno */
1460
__attribute__((warn_unused_result))
1394
1461
error_t raise_privileges(void){
1395
1462
error_t old_errno = errno;
1396
1463
error_t ret_errno = 0;
1403
1470
}
1404
1471
1405
1472
/* Set effective and real user ID to 0. Return errno. */
1473
__attribute__((warn_unused_result))
1406
1474
error_t raise_privileges_permanently(void){
1407
1475
error_t old_errno = errno;
1408
1476
error_t ret_errno = raise_privileges();
1419
1487
}
1420
1488
1421
1489
/* Set effective user ID to unprivileged saved user ID */
1490
__attribute__((warn_unused_result))
1422
1491
error_t lower_privileges(void){
1423
1492
error_t old_errno = errno;
1424
1493
error_t ret_errno = 0;
1431
1500
}
1432
1501
1433
1502
/* Lower privileges permanently */
1503
__attribute__((warn_unused_result))
1434
1504
error_t lower_privileges_permanently(void){
1435
1505
error_t old_errno = errno;
1436
1506
error_t ret_errno = 0;
1442
1512
return ret_errno;
1443
1513
}
1444
1514
1445
bool run_network_hooks(const char *mode, const char *interface,
1515
__attribute__((nonnull))
1516
void run_network_hooks(const char *mode, const char *interface,
1446
1517
const float delay){
1447
1518
struct dirent **direntries;
1448
struct dirent *direntry;
1449
int ret;
1450
1519
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
1520
alphasort);
1452
1521
if(numhooks == -1){
1459
1528
perror_plus("scandir");
1460
1529
}
1461
1530
} else {
1531
struct dirent *direntry;
1532
int ret;
1462
1533
int devnull = open("/dev/null", O_RDONLY);
1463
1534
for(int i = 0; i < numhooks; i++){
1464
1535
direntry = direntries[i];
1476
1547
if(hook_pid == 0){
1477
1548
/* Child */
1478
1549
/* Raise privileges */
1479
raise_privileges_permanently();
1550
if(raise_privileges_permanently() != 0){
1551
perror_plus("Failed to raise privileges");
1552
_exit(EX_NOPERM);
1553
}
1480
1554
/* Set group */
1481
1555
errno = 0;
1482
1556
ret = setgid(0);
1483
1557
if(ret == -1){
1484
1558
perror_plus("setgid");
1559
_exit(EX_NOPERM);
1485
1560
}
1486
1561
/* Reset supplementary groups */
1487
1562
errno = 0;
1488
1563
ret = setgroups(0, NULL);
1489
1564
if(ret == -1){
1490
1565
perror_plus("setgroups");
1491
}
1492
dup2(devnull, STDIN_FILENO);
1493
close(devnull);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
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
}
1495
1583
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1496
1584
if(ret == -1){
1497
1585
perror_plus("setenv");
1513
1601
_exit(EX_OSERR);
1514
1602
}
1515
1603
char *delaystring;
1516
ret = asprintf(&delaystring, "%f", delay);
1604
ret = asprintf(&delaystring, "%f", (double)delay);
1517
1605
if(ret == -1){
1518
1606
perror_plus("asprintf");
1519
1607
_exit(EX_OSERR);
1572
1660
}
1573
1661
close(devnull);
1574
1662
}
1575
return true;
1576
1663
}
1577
1664
1665
__attribute__((nonnull, warn_unused_result))
1578
1666
error_t bring_up_interface(const char *const interface,
1579
1667
const float delay){
1580
int sd = -1;
1581
1668
error_t old_errno = errno;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1669
int ret;
1584
1670
struct ifreq network;
1585
1671
unsigned int if_index = if_nametoindex(interface);
1586
1672
if(if_index == 0){
1595
1681
}
1596
1682
1597
1683
if(not interface_is_up(interface)){
1598
if(not get_flags(interface, &network) and debug){
1684
error_t ret_errno = 0, ioctl_errno = 0;
1685
if(not get_flags(interface, &network)){
1599
1686
ret_errno = errno;
1600
1687
fprintf_plus(stderr, "Failed to get flags for interface "
1601
1688
"\"%s\"\n", interface);
1689
errno = old_errno;
1602
1690
return ret_errno;
1603
1691
}
1604
network.ifr_flags |= IFF_UP;
1692
network.ifr_flags |= IFF_UP; /* set flag */
1605
1693
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1607
if(sd < 0){
1694
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1695
if(sd == -1){
1608
1696
ret_errno = errno;
1609
1697
perror_plus("socket");
1610
1698
errno = old_errno;
1611
1699
return ret_errno;
1612
1700
}
1613
1701
1614
1702
if(quit_now){
1615
close(sd);
1703
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1704
if(ret == -1){
1705
perror_plus("close");
1706
}
1616
1707
errno = old_errno;
1617
1708
return EINTR;
1618
1709
}
1622
1713
interface);
1623
1714
}
1624
1715
1625
/* Raise priviliges */
1626
raise_privileges();
1627
1716
/* Raise privileges */
1717
ret_errno = raise_privileges();
1718
bool restore_loglevel = false;
1719
if(ret_errno != 0){
1720
perror_plus("Failed to raise privileges");
1721
}
1628
1722
#ifdef __linux__
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");
1723
int ret_linux;
1724
if(ret_errno == 0){
1725
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1726
messages about the network interface to mess up the prompt */
1727
ret_linux = klogctl(8, NULL, 5);
1728
if(ret_linux == -1){
1729
perror_plus("klogctl");
1730
} else {
1731
restore_loglevel = true;
1732
}
1636
1733
}
1637
1734
#endif /* __linux__ */
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1639
ret_errno = errno;
1735
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1736
ioctl_errno = errno;
1640
1737
#ifdef __linux__
1641
1738
if(restore_loglevel){
1642
1739
ret_linux = klogctl(7, NULL, 0);
1646
1743
}
1647
1744
#endif /* __linux__ */
1648
1745
1649
/* Lower privileges */
1650
lower_privileges();
1746
/* If raise_privileges() succeeded above */
1747
if(ret_errno == 0){
1748
/* Lower privileges */
1749
ret_errno = lower_privileges();
1750
if(ret_errno != 0){
1751
errno = ret_errno;
1752
perror_plus("Failed to lower privileges");
1753
}
1754
}
1651
1755
1652
1756
/* Close the socket */
1653
1757
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1656
1760
}
1657
1761
1658
1762
if(ret_setflags == -1){
1659
errno = ret_errno;
1763
errno = ioctl_errno;
1660
1764
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1661
1765
errno = old_errno;
1662
return ret_errno;
1766
return ioctl_errno;
1663
1767
}
1664
1768
} else if(debug){
1665
1769
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1683
1787
return 0;
1684
1788
}
1685
1789
1790
__attribute__((nonnull, warn_unused_result))
1686
1791
error_t take_down_interface(const char *const interface){
1687
int sd = -1;
1688
1792
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1691
1793
struct ifreq network;
1692
1794
unsigned int if_index = if_nametoindex(interface);
1693
1795
if(if_index == 0){
1696
1798
return ENXIO;
1697
1799
}
1698
1800
if(interface_is_up(interface)){
1801
error_t ret_errno = 0, ioctl_errno = 0;
1699
1802
if(not get_flags(interface, &network) and debug){
1700
1803
ret_errno = errno;
1701
1804
fprintf_plus(stderr, "Failed to get flags for interface "
1702
1805
"\"%s\"\n", interface);
1806
errno = old_errno;
1703
1807
return ret_errno;
1704
1808
}
1705
1809
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1706
1810
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1708
if(sd < 0){
1811
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1812
if(sd == -1){
1709
1813
ret_errno = errno;
1710
1814
perror_plus("socket");
1711
1815
errno = old_errno;
1717
1821
interface);
1718
1822
}
1719
1823
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();
1824
/* Raise privileges */
1825
ret_errno = raise_privileges();
1826
if(ret_errno != 0){
1827
perror_plus("Failed to raise privileges");
1828
}
1829
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1830
ioctl_errno = errno;
1831
1832
/* If raise_privileges() succeeded above */
1833
if(ret_errno == 0){
1834
/* Lower privileges */
1835
ret_errno = lower_privileges();
1836
if(ret_errno != 0){
1837
errno = ret_errno;
1838
perror_plus("Failed to lower privileges");
1839
}
1840
}
1728
1841
1729
1842
/* Close the socket */
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1843
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1731
1844
if(ret == -1){
1732
1845
perror_plus("close");
1733
1846
}
1734
1847
1735
1848
if(ret_setflags == -1){
1736
errno = ret_errno;
1849
errno = ioctl_errno;
1737
1850
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
1851
errno = old_errno;
1739
return ret_errno;
1852
return ioctl_errno;
1740
1853
}
1741
1854
} else if(debug){
1742
1855
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1748
1861
}
1749
1862
1750
1863
int main(int argc, char *argv[]){
1864
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1865
.priority = "SECURE256:!CTYPE-X.509:"
1866
"+CTYPE-OPENPGP", .current_server = NULL,
1867
.interfaces = NULL, .interfaces_size = 0 };
1751
1868
AvahiSServiceBrowser *sb = NULL;
1752
1869
error_t ret_errno;
1753
1870
int ret;
1754
1871
intmax_t tmpmax;
1755
1872
char *tmp;
1756
1873
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1759
1874
char *interfaces_to_take_down = NULL;
1760
1875
size_t interfaces_to_take_down_size = 0;
1761
char tempdir[] = "/tmp/mandosXXXXXX";
1762
bool tempdir_created = false;
1876
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1877
char old_tempdir[] = "/tmp/mandosXXXXXX";
1878
char *tempdir = NULL;
1763
1879
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1764
1880
const char *seckey = PATHDIR "/" SECKEY;
1765
1881
const char *pubkey = PATHDIR "/" PUBKEY;
1766
1882
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1768
1883
1769
1884
bool gnutls_initialized = false;
1770
1885
bool gpgme_initialized = false;
1861
1976
connect_to = arg;
1862
1977
break;
1863
1978
case 'i': /* --interface */
1864
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1865
(int)',');
1979
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1980
arg, (int)',');
1866
1981
if(ret_errno != 0){
1867
1982
argp_error(state, "%s", strerror(ret_errno));
1868
1983
}
1948
2063
/* Work around Debian bug #633582:
1949
2064
<http://bugs.debian.org/633582> */
1950
2065
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
2066
/* Re-raise privileges */
2067
ret_errno = raise_privileges();
2068
if(ret_errno != 0){
2069
errno = ret_errno;
2070
perror_plus("Failed to raise privileges");
2071
} else {
1953
2072
struct stat st;
1954
2073
1955
2074
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1995
2114
}
1996
2115
1997
2116
/* Lower privileges */
1998
errno = 0;
1999
ret = seteuid(uid);
2000
if(ret == -1){
2001
perror_plus("seteuid");
2117
ret_errno = lower_privileges();
2118
if(ret_errno != 0){
2119
errno = ret_errno;
2120
perror_plus("Failed to lower privileges");
2002
2121
}
2003
2122
}
2004
2123
}
2005
2124
2006
/* Remove empty interface names */
2125
/* Remove invalid interface names (except "none") */
2007
2126
{
2008
2127
char *interface = NULL;
2009
while((interface = argz_next(interfaces, interfaces_size,
2128
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2010
2129
interface))){
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2130
if(strcmp(interface, "none") != 0
2131
and if_nametoindex(interface) == 0){
2132
if(interface[0] != '\0'){
2013
2133
fprintf_plus(stderr, "Not using nonexisting interface"
2014
2134
" \"%s\"\n", interface);
2015
2135
}
2016
argz_delete(&interfaces, &interfaces_size, interface);
2136
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2017
2137
interface = NULL;
2018
2138
}
2019
2139
}
2021
2141
2022
2142
/* Run network hooks */
2023
2143
{
2024
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2144
if(mc.interfaces != NULL){
2145
interfaces_hooks = malloc(mc.interfaces_size);
2027
2146
if(interfaces_hooks == NULL){
2028
2147
perror_plus("malloc");
2029
2148
goto end;
2030
2149
}
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
}
2150
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2151
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2152
}
2153
run_network_hooks("start", interfaces_hooks != NULL ?
2154
interfaces_hooks : "", delay);
2040
2155
}
2041
2156
2042
2157
if(not debug){
2047
2162
from the signal handler */
2048
2163
/* Initialize the pseudo-RNG for Avahi */
2049
2164
srand((unsigned int) time(NULL));
2050
mc.simple_poll = avahi_simple_poll_new();
2051
if(mc.simple_poll == NULL){
2165
simple_poll = avahi_simple_poll_new();
2166
if(simple_poll == NULL){
2052
2167
fprintf_plus(stderr,
2053
2168
"Avahi: Failed to create simple poll object.\n");
2054
2169
exitcode = EX_UNAVAILABLE;
2119
2234
}
2120
2235
2121
2236
/* If no interfaces were specified, make a list */
2122
if(interfaces == NULL){
2237
if(mc.interfaces == NULL){
2123
2238
struct dirent **direntries;
2124
2239
/* Look for any good interfaces */
2125
2240
ret = scandir(sys_class_net, &direntries, good_interface,
2127
2242
if(ret >= 1){
2128
2243
/* Add all found interfaces to interfaces list */
2129
2244
for(int i = 0; i < ret; ++i){
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2245
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2131
2246
direntries[i]->d_name);
2132
2247
if(ret_errno != 0){
2248
errno = ret_errno;
2133
2249
perror_plus("argz_add");
2134
2250
continue;
2135
2251
}
2147
2263
}
2148
2264
}
2149
2265
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)){
2266
/* Bring up interfaces which are down, and remove any "none"s */
2267
{
2162
2268
char *interface = NULL;
2163
while((interface = argz_next(interfaces, interfaces_size,
2269
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2164
2270
interface))){
2271
/* If interface name is "none", stop bringing up interfaces.
2272
Also remove all instances of "none" from the list */
2273
if(strcmp(interface, "none") == 0){
2274
argz_delete(&mc.interfaces, &mc.interfaces_size,
2275
interface);
2276
interface = NULL;
2277
while((interface = argz_next(mc.interfaces,
2278
mc.interfaces_size, interface))){
2279
if(strcmp(interface, "none") == 0){
2280
argz_delete(&mc.interfaces, &mc.interfaces_size,
2281
interface);
2282
interface = NULL;
2283
}
2284
}
2285
break;
2286
}
2165
2287
bool interface_was_up = interface_is_up(interface);
2166
ret = bring_up_interface(interface, delay);
2288
errno = bring_up_interface(interface, delay);
2167
2289
if(not interface_was_up){
2168
if(ret != 0){
2169
errno = ret;
2290
if(errno != 0){
2170
2291
perror_plus("Failed to bring up interface");
2171
2292
} else {
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2174
interface);
2293
errno = argz_add(&interfaces_to_take_down,
2294
&interfaces_to_take_down_size,
2295
interface);
2296
if(errno != 0){
2297
perror_plus("argz_add");
2298
}
2175
2299
}
2176
2300
}
2177
2301
}
2178
free(interfaces);
2179
interfaces = NULL;
2180
interfaces_size = 0;
2181
2302
if(debug and (interfaces_to_take_down == NULL)){
2182
2303
fprintf_plus(stderr, "No interfaces were brought up\n");
2183
2304
}
2184
2305
}
2185
2306
2307
/* If we only got one interface, explicitly use only that one */
2308
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2309
if(debug){
2310
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2311
mc.interfaces);
2312
}
2313
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2314
}
2315
2186
2316
if(quit_now){
2187
2317
goto end;
2188
2318
}
2189
2319
2190
ret = init_gnutls_global(pubkey, seckey);
2320
ret = init_gnutls_global(pubkey, seckey, &mc);
2191
2321
if(ret == -1){
2192
2322
fprintf_plus(stderr, "init_gnutls_global failed\n");
2193
2323
exitcode = EX_UNAVAILABLE;
2200
2330
goto end;
2201
2331
}
2202
2332
2203
if(mkdtemp(tempdir) == NULL){
2333
/* Try /run/tmp before /tmp */
2334
tempdir = mkdtemp(run_tempdir);
2335
if(tempdir == NULL and errno == ENOENT){
2336
if(debug){
2337
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2338
run_tempdir, old_tempdir);
2339
}
2340
tempdir = mkdtemp(old_tempdir);
2341
}
2342
if(tempdir == NULL){
2204
2343
perror_plus("mkdtemp");
2205
2344
goto end;
2206
2345
}
2207
tempdir_created = true;
2208
2346
2209
2347
if(quit_now){
2210
2348
goto end;
2211
2349
}
2212
2350
2213
if(not init_gpgme(pubkey, seckey, tempdir)){
2351
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2214
2352
fprintf_plus(stderr, "init_gpgme failed\n");
2215
2353
exitcode = EX_UNAVAILABLE;
2216
2354
goto end;
2246
2384
exitcode = EX_USAGE;
2247
2385
goto end;
2248
2386
}
2249
2387
2250
2388
if(quit_now){
2251
2389
goto end;
2252
2390
}
2273
2411
}
2274
2412
2275
2413
while(not quit_now){
2276
ret = start_mandos_communication(address, port, if_index, af);
2414
ret = start_mandos_communication(address, port, if_index, af,
2415
&mc);
2277
2416
if(quit_now or ret == 0){
2278
2417
break;
2279
2418
}
2281
2420
fprintf_plus(stderr, "Retrying in %d seconds\n",
2282
2421
(int)retry_interval);
2283
2422
}
2284
sleep((int)retry_interval);
2423
sleep((unsigned int)retry_interval);
2285
2424
}
2286
2425
2287
if (not quit_now){
2426
if(not quit_now){
2288
2427
exitcode = EXIT_SUCCESS;
2289
2428
}
2290
2429
2305
2444
config.publish_domain = 0;
2306
2445
2307
2446
/* Allocate a new server */
2308
mc.server = avahi_server_new(avahi_simple_poll_get
2309
(mc.simple_poll), &config, NULL,
2310
NULL, &ret_errno);
2447
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2448
&config, NULL, NULL, &ret_errno);
2311
2449
2312
2450
/* Free the Avahi configuration data */
2313
2451
avahi_server_config_free(&config);
2328
2466
/* Create the Avahi service browser */
2329
2467
sb = avahi_s_service_browser_new(mc.server, if_index,
2330
2468
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2331
NULL, 0, browse_callback, NULL);
2469
NULL, 0, browse_callback,
2470
(void *)&mc);
2332
2471
if(sb == NULL){
2333
2472
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2334
2473
avahi_strerror(avahi_server_errno(mc.server)));
2346
2485
fprintf_plus(stderr, "Starting Avahi loop search\n");
2347
2486
}
2348
2487
2349
ret = avahi_loop_with_timeout(mc.simple_poll,
2350
(int)(retry_interval * 1000));
2488
ret = avahi_loop_with_timeout(simple_poll,
2489
(int)(retry_interval * 1000), &mc);
2351
2490
if(debug){
2352
2491
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2353
2492
(ret == 0) ? "successfully" : "with error");
2360
2499
}
2361
2500
2362
2501
/* Cleanup things */
2502
free(mc.interfaces);
2503
2363
2504
if(sb != NULL)
2364
2505
avahi_s_service_browser_free(sb);
2365
2506
2366
2507
if(mc.server != NULL)
2367
2508
avahi_server_free(mc.server);
2368
2509
2369
if(mc.simple_poll != NULL)
2370
avahi_simple_poll_free(mc.simple_poll);
2510
if(simple_poll != NULL)
2511
avahi_simple_poll_free(simple_poll);
2371
2512
2372
2513
if(gnutls_initialized){
2373
2514
gnutls_certificate_free_credentials(mc.cred);
2390
2531
}
2391
2532
}
2392
2533
2393
/* Re-raise priviliges */
2534
/* Re-raise privileges */
2394
2535
{
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();
2536
ret_errno = raise_privileges();
2537
if(ret_errno != 0){
2538
perror_plus("Failed to raise privileges");
2539
} else {
2540
2541
/* Run network hooks */
2542
run_network_hooks("stop", interfaces_hooks != NULL ?
2543
interfaces_hooks : "", delay);
2544
2545
/* Take down the network interfaces which were brought up */
2546
{
2547
char *interface = NULL;
2548
while((interface=argz_next(interfaces_to_take_down,
2549
interfaces_to_take_down_size,
2550
interface))){
2551
ret_errno = take_down_interface(interface);
2552
if(ret_errno != 0){
2553
errno = ret_errno;
2554
perror_plus("Failed to take down interface");
2555
}
2556
}
2557
if(debug and (interfaces_to_take_down == NULL)){
2558
fprintf_plus(stderr, "No interfaces needed to be taken"
2559
" down\n");
2560
}
2561
}
2562
}
2563
ret_errno = lower_privileges_permanently();
2564
if(ret_errno != 0){
2565
perror_plus("Failed to lower privileges permanently");
2566
}
2420
2567
}
2421
2568
2422
2569
free(interfaces_to_take_down);
2423
2570
free(interfaces_hooks);
2424
2571
2425
2572
/* Removes the GPGME temp directory and all files inside */
2426
if(tempdir_created){
2573
if(tempdir != NULL){
2427
2574
struct dirent **direntries = NULL;
2428
2575
struct dirent *direntry = NULL;
2429
2576
int numentries = scandir(tempdir, &direntries, notdotentries,
2430
2577
alphasort);
2431
if (numentries > 0){
2578
if(numentries > 0){
2432
2579
for(int i = 0; i < numentries; i++){
2433
2580
direntry = direntries[i];
2434
2581
char *fullname = NULL;
2449
2596
2450
2597
/* need to clean even if 0 because man page doesn't specify */
2451
2598
free(direntries);
2452
if (numentries == -1){
2599
if(numentries == -1){
2453
2600
perror_plus("scandir");
2454
2601
}
2455
2602
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0