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- Committer: Teddy Hogeborn
- Date: 2014-03-23 19:24:40 UTC
- Revision ID: teddy@recompile.se-20140323192440-d71iiqxebsxf9u2v
Update GCC warning flags and function attributes to GCC 4.7.
* Makefile (WARN): Update to include almost all warning flags.
* plugin-runner.c (getplugin, add_to_char_array, add_argument,
add_environment, set_cloexec_flag,
print_out_password): Add attribute
"warn_unused_result".
(main/parse_opt): Bug fix: Add error checking to --global-env,
--env-for, --plugin-dir, and --config-file, and
make sure errno does not "leak" from unrelated
functions.
* plugins.d/mandos-client.c
(fprintf_plus, debuggnutls, resolve_callback): Add "nonnull"
attribute.
(incbuffer, add_server, init_gpgme): Add "nonnull" and
"warn_unused_result"
attributes.
(pgp_packet_decrypt, init_gnutls_global): - '' -
(init_gnutls_session start_mandos_communication, get_flags): - '' -
(good_flags, good_interface, interface_is_up): - '' -
(interface_is_running, runnable_hook): - '' -
(avahi_loop_with_timeout, bring_up_interface): : - '' -
(safer_gnutls_strerror): Add "warn_unused_result" attribute.
(notdotentries): Set "nonnull", "pure", and "warn_unused_result"
attributes.
(raise_privileges, raise_privileges_permanently, lower_privileges,
lower_privileges_permanently): Set "warn_unused_result" attribute.
(run_network_hooks): Exit child process if it fails to do anything
it needs to do. Make explicit cast to double
when passing float value to asprintf(). Change
return type to void - all callers changed.
(bring_up_interface): Move variables "sd", "ret_errno", and
"ret_setflags" to innermost scope. Bug fix:
Fail if could not get interface flags also in
non-debug mode, and restore old errno
correctly. Print message if could not raise
(or later lower) privileges.
(take_down_interface): Bug fix: When failing because it could not
get interface flags, restore old errno
correctly. Print message if it could not
raise (or later lower) privileges.
(main): Complain if failed to raise or lower privileges. Only run
network hooks or lower privileges if raising privileges was
successful.
* Makefile (WARN): Update to include almost all warning flags.
* plugin-runner.c (getplugin, add_to_char_array, add_argument,
add_environment, set_cloexec_flag,
print_out_password): Add attribute
"warn_unused_result".
(main/parse_opt): Bug fix: Add error checking to --global-env,
--env-for, --plugin-dir, and --config-file, and
make sure errno does not "leak" from unrelated
functions.
* plugins.d/mandos-client.c
(fprintf_plus, debuggnutls, resolve_callback): Add "nonnull"
attribute.
(incbuffer, add_server, init_gpgme): Add "nonnull" and
"warn_unused_result"
attributes.
(pgp_packet_decrypt, init_gnutls_global): - '' -
(init_gnutls_session start_mandos_communication, get_flags): - '' -
(good_flags, good_interface, interface_is_up): - '' -
(interface_is_running, runnable_hook): - '' -
(avahi_loop_with_timeout, bring_up_interface): : - '' -
(safer_gnutls_strerror): Add "warn_unused_result" attribute.
(notdotentries): Set "nonnull", "pure", and "warn_unused_result"
attributes.
(raise_privileges, raise_privileges_permanently, lower_privileges,
lower_privileges_permanently): Set "warn_unused_result" attribute.
(run_network_hooks): Exit child process if it fails to do anything
it needs to do. Make explicit cast to double
when passing float value to asprintf(). Change
return type to void - all callers changed.
(bring_up_interface): Move variables "sd", "ret_errno", and
"ret_setflags" to innermost scope. Bug fix:
Fail if could not get interface flags also in
non-debug mode, and restore old errno
correctly. Print message if could not raise
(or later lower) privileges.
(take_down_interface): Bug fix: When failing because it could not
get interface flags, restore old errno
correctly. Print message if it could not
raise (or later lower) privileges.
(main): Complain if failed to raise or lower privileges. Only run
network hooks or lower privileges if raising privileges was
successful.
- files added:
- debian/upstream-signing-key.pgp
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 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
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
64
strtoimax() */
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno,
66
66
program_invocation_short_name */
67
67
#include <time.h> /* nanosleep(), time(), sleep() */
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
76
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
80
80
argp_state, struct argp,
92
92
argz_delete(), argz_append(),
93
93
argz_stringify(), argz_add(),
94
94
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
95
97
96
98
#ifdef __linux__
97
99
#include <sys/klog.h> /* klogctl() */
145
147
/* Doubly linked list that need to be circularly linked when used */
146
148
typedef struct server{
147
149
const char *ip;
148
uint16_t port;
150
in_port_t port;
149
151
AvahiIfIndex if_index;
150
152
int af;
151
153
struct timespec last_seen;
155
157
156
158
/* Used for passing in values through the Avahi callback functions */
157
159
typedef struct {
158
AvahiSimplePoll *simple_poll;
159
160
AvahiServer *server;
160
161
gnutls_certificate_credentials_t cred;
161
162
unsigned int dh_bits;
163
164
const char *priority;
164
165
gpgme_ctx_t ctx;
165
166
server *current_server;
167
char *interfaces;
168
size_t interfaces_size;
166
169
} mandos_context;
167
170
168
/* global context so signal handler can reach it*/
169
mandos_context mc = { .simple_poll = NULL, .server = NULL,
170
.dh_bits = 1024, .priority = "SECURE256"
171
":!CTYPE-X.509:+CTYPE-OPENPGP",
172
.current_server = NULL };
171
/* global so signal handler can reach it*/
172
AvahiSimplePoll *simple_poll;
173
173
174
174
sig_atomic_t quit_now = 0;
175
175
int signal_received = 0;
183
183
perror(print_text);
184
184
}
185
185
186
__attribute__((format (gnu_printf, 2, 3)))
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
187
187
int fprintf_plus(FILE *stream, const char *format, ...){
188
188
va_list ap;
189
189
va_start (ap, format);
190
190
191
191
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
192
192
program_invocation_short_name));
193
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
194
194
}
195
195
196
196
/*
198
198
* bytes. "buffer_capacity" is how much is currently allocated,
199
199
* "buffer_length" is how much is already used.
200
200
*/
201
__attribute__((nonnull, warn_unused_result))
201
202
size_t incbuffer(char **buffer, size_t buffer_length,
202
203
size_t buffer_capacity){
203
204
if(buffer_length + BUFFER_SIZE > buffer_capacity){
204
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
205
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;
206
211
return 0;
207
212
}
213
*buffer = new_buf;
208
214
buffer_capacity += BUFFER_SIZE;
209
215
}
210
216
return buffer_capacity;
211
217
}
212
218
213
219
/* Add server to set of servers to retry periodically */
214
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
215
int af){
220
__attribute__((nonnull, warn_unused_result))
221
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
222
int af, server **current_server){
216
223
int ret;
217
224
server *new_server = malloc(sizeof(server));
218
225
if(new_server == NULL){
227
234
perror_plus("strdup");
228
235
return false;
229
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
230
242
/* Special case of first server */
231
if (mc.current_server == NULL){
243
if(*current_server == NULL){
232
244
new_server->next = new_server;
233
245
new_server->prev = new_server;
234
mc.current_server = new_server;
235
/* Place the new server last in the list */
246
*current_server = new_server;
236
247
} else {
237
new_server->next = mc.current_server;
238
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;
239
251
new_server->prev->next = new_server;
240
mc.current_server->prev = new_server;
241
}
242
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
243
if(ret == -1){
244
perror_plus("clock_gettime");
245
return false;
252
(*current_server)->prev = new_server;
246
253
}
247
254
return true;
248
255
}
250
257
/*
251
258
* Initialize GPGME.
252
259
*/
260
__attribute__((nonnull, warn_unused_result))
253
261
static bool init_gpgme(const char *seckey, const char *pubkey,
254
const char *tempdir){
262
const char *tempdir, mandos_context *mc){
255
263
gpgme_error_t rc;
256
264
gpgme_engine_info_t engine_info;
257
265
258
259
266
/*
260
267
* Helper function to insert pub and seckey to the engine keyring.
261
268
*/
277
284
return false;
278
285
}
279
286
280
rc = gpgme_op_import(mc.ctx, pgp_data);
287
rc = gpgme_op_import(mc->ctx, pgp_data);
281
288
if(rc != GPG_ERR_NO_ERROR){
282
289
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
283
290
gpgme_strsource(rc), gpgme_strerror(rc));
327
334
}
328
335
329
336
/* Create new GPGME "context" */
330
rc = gpgme_new(&(mc.ctx));
337
rc = gpgme_new(&(mc->ctx));
331
338
if(rc != GPG_ERR_NO_ERROR){
332
339
fprintf_plus(stderr, "Mandos plugin mandos-client: "
333
340
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
346
353
* Decrypt OpenPGP data.
347
354
* Returns -1 on error
348
355
*/
356
__attribute__((nonnull, warn_unused_result))
349
357
static ssize_t pgp_packet_decrypt(const char *cryptotext,
350
358
size_t crypto_size,
351
char **plaintext){
359
char **plaintext,
360
mandos_context *mc){
352
361
gpgme_data_t dh_crypto, dh_plain;
353
362
gpgme_error_t rc;
354
363
ssize_t ret;
380
389
381
390
/* Decrypt data from the cryptotext data buffer to the plaintext
382
391
data buffer */
383
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
392
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
384
393
if(rc != GPG_ERR_NO_ERROR){
385
394
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
386
395
gpgme_strsource(rc), gpgme_strerror(rc));
387
396
plaintext_length = -1;
388
397
if(debug){
389
398
gpgme_decrypt_result_t result;
390
result = gpgme_op_decrypt_result(mc.ctx);
399
result = gpgme_op_decrypt_result(mc->ctx);
391
400
if(result == NULL){
392
401
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
393
402
} else {
470
479
return plaintext_length;
471
480
}
472
481
473
static const char * safer_gnutls_strerror(int value){
474
const char *ret = gnutls_strerror(value); /* Spurious warning from
475
-Wunreachable-code */
482
__attribute__((warn_unused_result))
483
static const char *safer_gnutls_strerror(int value){
484
const char *ret = gnutls_strerror(value);
476
485
if(ret == NULL)
477
486
ret = "(unknown)";
478
487
return ret;
479
488
}
480
489
481
490
/* GnuTLS log function callback */
491
__attribute__((nonnull))
482
492
static void debuggnutls(__attribute__((unused)) int level,
483
493
const char* string){
484
494
fprintf_plus(stderr, "GnuTLS: %s", string);
485
495
}
486
496
497
__attribute__((nonnull, warn_unused_result))
487
498
static int init_gnutls_global(const char *pubkeyfilename,
488
const char *seckeyfilename){
499
const char *seckeyfilename,
500
mandos_context *mc){
489
501
int ret;
490
502
491
503
if(debug){
508
520
}
509
521
510
522
/* OpenPGP credentials */
511
ret = gnutls_certificate_allocate_credentials(&mc.cred);
523
ret = gnutls_certificate_allocate_credentials(&mc->cred);
512
524
if(ret != GNUTLS_E_SUCCESS){
513
525
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
514
526
safer_gnutls_strerror(ret));
524
536
}
525
537
526
538
ret = gnutls_certificate_set_openpgp_key_file
527
(mc.cred, pubkeyfilename, seckeyfilename,
539
(mc->cred, pubkeyfilename, seckeyfilename,
528
540
GNUTLS_OPENPGP_FMT_BASE64);
529
541
if(ret != GNUTLS_E_SUCCESS){
530
542
fprintf_plus(stderr,
536
548
}
537
549
538
550
/* GnuTLS server initialization */
539
ret = gnutls_dh_params_init(&mc.dh_params);
551
ret = gnutls_dh_params_init(&mc->dh_params);
540
552
if(ret != GNUTLS_E_SUCCESS){
541
553
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
542
554
" initialization: %s\n",
543
555
safer_gnutls_strerror(ret));
544
556
goto globalfail;
545
557
}
546
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
558
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
547
559
if(ret != GNUTLS_E_SUCCESS){
548
560
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
549
561
safer_gnutls_strerror(ret));
550
562
goto globalfail;
551
563
}
552
564
553
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
565
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
554
566
555
567
return 0;
556
568
557
569
globalfail:
558
570
559
gnutls_certificate_free_credentials(mc.cred);
571
gnutls_certificate_free_credentials(mc->cred);
560
572
gnutls_global_deinit();
561
gnutls_dh_params_deinit(mc.dh_params);
573
gnutls_dh_params_deinit(mc->dh_params);
562
574
return -1;
563
575
}
564
576
565
static int init_gnutls_session(gnutls_session_t *session){
577
__attribute__((nonnull, warn_unused_result))
578
static int init_gnutls_session(gnutls_session_t *session,
579
mandos_context *mc){
566
580
int ret;
567
581
/* GnuTLS session creation */
568
582
do {
580
594
{
581
595
const char *err;
582
596
do {
583
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
597
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
584
598
if(quit_now){
585
599
gnutls_deinit(*session);
586
600
return -1;
597
611
598
612
do {
599
613
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
600
mc.cred);
614
mc->cred);
601
615
if(quit_now){
602
616
gnutls_deinit(*session);
603
617
return -1;
613
627
/* ignore client certificate if any. */
614
628
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
615
629
616
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
630
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
617
631
618
632
return 0;
619
633
}
623
637
__attribute__((unused)) const char *txt){}
624
638
625
639
/* Called when a Mandos server is found */
626
static int start_mandos_communication(const char *ip, uint16_t port,
640
__attribute__((nonnull, warn_unused_result))
641
static int start_mandos_communication(const char *ip, in_port_t port,
627
642
AvahiIfIndex if_index,
628
int af){
643
int af, mandos_context *mc){
629
644
int ret, tcp_sd = -1;
630
645
ssize_t sret;
631
union {
632
struct sockaddr_in in;
633
struct sockaddr_in6 in6;
634
} to;
646
struct sockaddr_storage to;
635
647
char *buffer = NULL;
636
648
char *decrypted_buffer = NULL;
637
649
size_t buffer_length = 0;
661
673
return -1;
662
674
}
663
675
664
ret = init_gnutls_session(&session);
676
/* If the interface is specified and we have a list of interfaces */
677
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
678
/* Check if the interface is one of the interfaces we are using */
679
bool match = false;
680
{
681
char *interface = NULL;
682
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
683
interface))){
684
if(if_nametoindex(interface) == (unsigned int)if_index){
685
match = true;
686
break;
687
}
688
}
689
}
690
if(not match){
691
/* This interface does not match any in the list, so we don't
692
connect to the server */
693
if(debug){
694
char interface[IF_NAMESIZE];
695
if(if_indextoname((unsigned int)if_index, interface) == NULL){
696
perror_plus("if_indextoname");
697
} else {
698
fprintf_plus(stderr, "Skipping server on non-used interface"
699
" \"%s\"\n",
700
if_indextoname((unsigned int)if_index,
701
interface));
702
}
703
}
704
return -1;
705
}
706
}
707
708
ret = init_gnutls_session(&session, mc);
665
709
if(ret != 0){
666
710
return -1;
667
711
}
668
712
669
713
if(debug){
670
714
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
671
PRIu16 "\n", ip, port);
715
PRIuMAX "\n", ip, (uintmax_t)port);
672
716
}
673
717
674
718
tcp_sd = socket(pf, SOCK_STREAM, 0);
686
730
687
731
memset(&to, 0, sizeof(to));
688
732
if(af == AF_INET6){
689
to.in6.sin6_family = (sa_family_t)af;
690
ret = inet_pton(af, ip, &to.in6.sin6_addr);
733
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
734
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
691
735
} else { /* IPv4 */
692
to.in.sin_family = (sa_family_t)af;
693
ret = inet_pton(af, ip, &to.in.sin_addr);
736
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
737
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
694
738
}
695
739
if(ret < 0 ){
696
740
int e = errno;
705
749
goto mandos_end;
706
750
}
707
751
if(af == AF_INET6){
708
to.in6.sin6_port = htons(port); /* Spurious warnings from
709
-Wconversion and
710
-Wunreachable-code */
711
712
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
713
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
714
-Wunreachable-code*/
752
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
753
if(IN6_IS_ADDR_LINKLOCAL
754
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
715
755
if(if_index == AVAHI_IF_UNSPEC){
716
756
fprintf_plus(stderr, "An IPv6 link-local address is"
717
757
" incomplete without a network interface\n");
719
759
goto mandos_end;
720
760
}
721
761
/* Set the network interface number as scope */
722
to.in6.sin6_scope_id = (uint32_t)if_index;
762
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
723
763
}
724
764
} else {
725
to.in.sin_port = htons(port); /* Spurious warnings from
726
-Wconversion and
727
-Wunreachable-code */
765
((struct sockaddr_in *)&to)->sin_port = htons(port);
728
766
}
729
767
730
768
if(quit_now){
738
776
if(if_indextoname((unsigned int)if_index, interface) == NULL){
739
777
perror_plus("if_indextoname");
740
778
} else {
741
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
742
"\n", ip, interface, port);
779
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
780
"\n", ip, interface, (uintmax_t)port);
743
781
}
744
782
} else {
745
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
746
ip, port);
783
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
784
ip, (uintmax_t)port);
747
785
}
748
786
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
749
787
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
750
const char *pcret;
751
788
if(af == AF_INET6){
752
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
753
sizeof(addrstr));
789
ret = getnameinfo((struct sockaddr *)&to,
790
sizeof(struct sockaddr_in6),
791
addrstr, sizeof(addrstr), NULL, 0,
792
NI_NUMERICHOST);
754
793
} else {
755
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
756
sizeof(addrstr));
794
ret = getnameinfo((struct sockaddr *)&to,
795
sizeof(struct sockaddr_in),
796
addrstr, sizeof(addrstr), NULL, 0,
797
NI_NUMERICHOST);
757
798
}
758
if(pcret == NULL){
759
perror_plus("inet_ntop");
760
} else {
761
if(strcmp(addrstr, ip) != 0){
762
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
763
}
799
if(ret == EAI_SYSTEM){
800
perror_plus("getnameinfo");
801
} else if(ret != 0) {
802
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
803
} else if(strcmp(addrstr, ip) != 0){
804
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
764
805
}
765
806
}
766
807
770
811
}
771
812
772
813
if(af == AF_INET6){
773
ret = connect(tcp_sd, &to.in6, sizeof(to));
814
ret = connect(tcp_sd, (struct sockaddr *)&to,
815
sizeof(struct sockaddr_in6));
774
816
} else {
775
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
817
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
818
sizeof(struct sockaddr_in));
776
819
}
777
820
if(ret < 0){
778
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
821
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
779
822
int e = errno;
780
823
perror_plus("connect");
781
824
errno = e;
942
985
if(buffer_length > 0){
943
986
ssize_t decrypted_buffer_size;
944
987
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
945
&decrypted_buffer);
988
&decrypted_buffer, mc);
946
989
if(decrypted_buffer_size >= 0){
947
990
948
991
written = 0;
996
1039
return retval;
997
1040
}
998
1041
1042
__attribute__((nonnull))
999
1043
static void resolve_callback(AvahiSServiceResolver *r,
1000
1044
AvahiIfIndex interface,
1001
1045
AvahiProtocol proto,
1009
1053
AVAHI_GCC_UNUSED AvahiStringList *txt,
1010
1054
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1011
1055
flags,
1012
AVAHI_GCC_UNUSED void* userdata){
1013
assert(r);
1056
void *mc){
1057
if(r == NULL){
1058
return;
1059
}
1014
1060
1015
1061
/* Called whenever a service has been resolved successfully or
1016
1062
timed out */
1025
1071
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1026
1072
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1027
1073
domain,
1028
avahi_strerror(avahi_server_errno(mc.server)));
1074
avahi_strerror(avahi_server_errno
1075
(((mandos_context*)mc)->server)));
1029
1076
break;
1030
1077
1031
1078
case AVAHI_RESOLVER_FOUND:
1037
1084
PRIdMAX ") on port %" PRIu16 "\n", name,
1038
1085
host_name, ip, (intmax_t)interface, port);
1039
1086
}
1040
int ret = start_mandos_communication(ip, port, interface,
1041
avahi_proto_to_af(proto));
1087
int ret = start_mandos_communication(ip, (in_port_t)port,
1088
interface,
1089
avahi_proto_to_af(proto),
1090
mc);
1042
1091
if(ret == 0){
1043
avahi_simple_poll_quit(mc.simple_poll);
1092
avahi_simple_poll_quit(simple_poll);
1044
1093
} else {
1045
if(not add_server(ip, port, interface,
1046
avahi_proto_to_af(proto))){
1094
if(not add_server(ip, (in_port_t)port, interface,
1095
avahi_proto_to_af(proto),
1096
&((mandos_context*)mc)->current_server)){
1047
1097
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1048
1098
" list\n", name);
1049
1099
}
1062
1112
const char *domain,
1063
1113
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1064
1114
flags,
1065
AVAHI_GCC_UNUSED void* userdata){
1066
assert(b);
1115
void *mc){
1116
if(b == NULL){
1117
return;
1118
}
1067
1119
1068
1120
/* Called whenever a new services becomes available on the LAN or
1069
1121
is removed from the LAN */
1077
1129
case AVAHI_BROWSER_FAILURE:
1078
1130
1079
1131
fprintf_plus(stderr, "(Avahi browser) %s\n",
1080
avahi_strerror(avahi_server_errno(mc.server)));
1081
avahi_simple_poll_quit(mc.simple_poll);
1132
avahi_strerror(avahi_server_errno
1133
(((mandos_context*)mc)->server)));
1134
avahi_simple_poll_quit(simple_poll);
1082
1135
return;
1083
1136
1084
1137
case AVAHI_BROWSER_NEW:
1087
1140
the callback function is called the Avahi server will free the
1088
1141
resolver for us. */
1089
1142
1090
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1091
name, type, domain, protocol, 0,
1092
resolve_callback, NULL) == NULL)
1143
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1144
interface, protocol, name, type,
1145
domain, protocol, 0,
1146
resolve_callback, mc) == NULL)
1093
1147
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1094
1148
" %s\n", name,
1095
avahi_strerror(avahi_server_errno(mc.server)));
1149
avahi_strerror(avahi_server_errno
1150
(((mandos_context*)mc)->server)));
1096
1151
break;
1097
1152
1098
1153
case AVAHI_BROWSER_REMOVE:
1117
1172
signal_received = sig;
1118
1173
int old_errno = errno;
1119
1174
/* set main loop to exit */
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1175
if(simple_poll != NULL){
1176
avahi_simple_poll_quit(simple_poll);
1122
1177
}
1123
1178
errno = old_errno;
1124
1179
}
1125
1180
1181
__attribute__((nonnull, warn_unused_result))
1126
1182
bool get_flags(const char *ifname, struct ifreq *ifr){
1127
1183
int ret;
1128
1184
error_t ret_errno;
1147
1203
return true;
1148
1204
}
1149
1205
1206
__attribute__((nonnull, warn_unused_result))
1150
1207
bool good_flags(const char *ifname, const struct ifreq *ifr){
1151
1208
1152
1209
/* Reject the loopback device */
1194
1251
* corresponds to an acceptable network device.
1195
1252
* (This function is passed to scandir(3) as a filter function.)
1196
1253
*/
1254
__attribute__((nonnull, warn_unused_result))
1197
1255
int good_interface(const struct dirent *if_entry){
1198
1256
if(if_entry->d_name[0] == '.'){
1199
1257
return 0;
1217
1275
/*
1218
1276
* This function determines if a network interface is up.
1219
1277
*/
1278
__attribute__((nonnull, warn_unused_result))
1220
1279
bool interface_is_up(const char *interface){
1221
1280
struct ifreq ifr;
1222
1281
if(not get_flags(interface, &ifr)){
1233
1292
/*
1234
1293
* This function determines if a network interface is running
1235
1294
*/
1295
__attribute__((nonnull, warn_unused_result))
1236
1296
bool interface_is_running(const char *interface){
1237
1297
struct ifreq ifr;
1238
1298
if(not get_flags(interface, &ifr)){
1246
1306
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1247
1307
}
1248
1308
1309
__attribute__((nonnull, pure, warn_unused_result))
1249
1310
int notdotentries(const struct dirent *direntry){
1250
1311
/* Skip "." and ".." */
1251
1312
if(direntry->d_name[0] == '.'
1258
1319
}
1259
1320
1260
1321
/* Is this directory entry a runnable program? */
1322
__attribute__((nonnull, warn_unused_result))
1261
1323
int runnable_hook(const struct dirent *direntry){
1262
1324
int ret;
1263
1325
size_t sret;
1318
1380
return 1;
1319
1381
}
1320
1382
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1383
__attribute__((nonnull, warn_unused_result))
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1385
mandos_context *mc){
1322
1386
int ret;
1323
1387
struct timespec now;
1324
1388
struct timespec waited_time;
1325
1389
intmax_t block_time;
1326
1390
1327
1391
while(true){
1328
if(mc.current_server == NULL){
1329
if (debug){
1392
if(mc->current_server == NULL){
1393
if(debug){
1330
1394
fprintf_plus(stderr, "Wait until first server is found."
1331
1395
" No timeout!\n");
1332
1396
}
1333
1397
ret = avahi_simple_poll_iterate(s, -1);
1334
1398
} else {
1335
if (debug){
1399
if(debug){
1336
1400
fprintf_plus(stderr, "Check current_server if we should run"
1337
1401
" it, or wait\n");
1338
1402
}
1345
1409
/* Calculating in ms how long time between now and server
1346
1410
who we visted longest time ago. Now - last seen. */
1347
1411
waited_time.tv_sec = (now.tv_sec
1348
- mc.current_server->last_seen.tv_sec);
1412
- mc->current_server->last_seen.tv_sec);
1349
1413
waited_time.tv_nsec = (now.tv_nsec
1350
- mc.current_server->last_seen.tv_nsec);
1414
- mc->current_server->last_seen.tv_nsec);
1351
1415
/* total time is 10s/10,000ms.
1352
1416
Converting to s from ms by dividing by 1,000,
1353
1417
and ns to ms by dividing by 1,000,000. */
1355
1419
- ((intmax_t)waited_time.tv_sec * 1000))
1356
1420
- ((intmax_t)waited_time.tv_nsec / 1000000));
1357
1421
1358
if (debug){
1422
if(debug){
1359
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
1424
block_time);
1361
1425
}
1362
1426
1363
1427
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);
1428
ret = start_mandos_communication(mc->current_server->ip,
1429
mc->current_server->port,
1430
mc->current_server->if_index,
1431
mc->current_server->af, mc);
1368
1432
if(ret == 0){
1369
avahi_simple_poll_quit(mc.simple_poll);
1433
avahi_simple_poll_quit(s);
1370
1434
return 0;
1371
1435
}
1372
1436
ret = clock_gettime(CLOCK_MONOTONIC,
1373
&mc.current_server->last_seen);
1437
&mc->current_server->last_seen);
1374
1438
if(ret == -1){
1375
1439
perror_plus("clock_gettime");
1376
1440
return -1;
1377
1441
}
1378
mc.current_server = mc.current_server->next;
1442
mc->current_server = mc->current_server->next;
1379
1443
block_time = 0; /* Call avahi to find new Mandos
1380
1444
servers, but don't block */
1381
1445
}
1383
1447
ret = avahi_simple_poll_iterate(s, (int)block_time);
1384
1448
}
1385
1449
if(ret != 0){
1386
if (ret > 0 or errno != EINTR){
1450
if(ret > 0 or errno != EINTR){
1387
1451
return (ret != 1) ? ret : 0;
1388
1452
}
1389
1453
}
1391
1455
}
1392
1456
1393
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1394
1459
error_t raise_privileges(void){
1395
1460
error_t old_errno = errno;
1396
1461
error_t ret_errno = 0;
1403
1468
}
1404
1469
1405
1470
/* Set effective and real user ID to 0. Return errno. */
1471
__attribute__((warn_unused_result))
1406
1472
error_t raise_privileges_permanently(void){
1407
1473
error_t old_errno = errno;
1408
1474
error_t ret_errno = raise_privileges();
1419
1485
}
1420
1486
1421
1487
/* Set effective user ID to unprivileged saved user ID */
1488
__attribute__((warn_unused_result))
1422
1489
error_t lower_privileges(void){
1423
1490
error_t old_errno = errno;
1424
1491
error_t ret_errno = 0;
1431
1498
}
1432
1499
1433
1500
/* Lower privileges permanently */
1501
__attribute__((warn_unused_result))
1434
1502
error_t lower_privileges_permanently(void){
1435
1503
error_t old_errno = errno;
1436
1504
error_t ret_errno = 0;
1442
1510
return ret_errno;
1443
1511
}
1444
1512
1445
bool run_network_hooks(const char *mode, const char *interface,
1513
__attribute__((nonnull))
1514
void run_network_hooks(const char *mode, const char *interface,
1446
1515
const float delay){
1447
1516
struct dirent **direntries;
1448
struct dirent *direntry;
1449
int ret;
1450
1517
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1451
1518
alphasort);
1452
1519
if(numhooks == -1){
1453
perror_plus("scandir");
1520
if(errno == ENOENT){
1521
if(debug){
1522
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1523
" found\n", hookdir);
1524
}
1525
} else {
1526
perror_plus("scandir");
1527
}
1454
1528
} else {
1529
struct dirent *direntry;
1530
int ret;
1455
1531
int devnull = open("/dev/null", O_RDONLY);
1456
1532
for(int i = 0; i < numhooks; i++){
1457
1533
direntry = direntries[i];
1469
1545
if(hook_pid == 0){
1470
1546
/* Child */
1471
1547
/* Raise privileges */
1472
raise_privileges_permanently();
1548
if(raise_privileges_permanently() != 0){
1549
perror_plus("Failed to raise privileges");
1550
_exit(EX_NOPERM);
1551
}
1473
1552
/* Set group */
1474
1553
errno = 0;
1475
1554
ret = setgid(0);
1476
1555
if(ret == -1){
1477
1556
perror_plus("setgid");
1557
_exit(EX_NOPERM);
1478
1558
}
1479
1559
/* Reset supplementary groups */
1480
1560
errno = 0;
1481
1561
ret = setgroups(0, NULL);
1482
1562
if(ret == -1){
1483
1563
perror_plus("setgroups");
1484
}
1485
dup2(devnull, STDIN_FILENO);
1486
close(devnull);
1487
dup2(STDERR_FILENO, STDOUT_FILENO);
1564
_exit(EX_NOPERM);
1565
}
1566
ret = dup2(devnull, STDIN_FILENO);
1567
if(ret == -1){
1568
perror_plus("dup2(devnull, STDIN_FILENO)");
1569
_exit(EX_OSERR);
1570
}
1571
ret = close(devnull);
1572
if(ret == -1){
1573
perror_plus("close");
1574
_exit(EX_OSERR);
1575
}
1576
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1577
if(ret == -1){
1578
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1579
_exit(EX_OSERR);
1580
}
1488
1581
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1489
1582
if(ret == -1){
1490
1583
perror_plus("setenv");
1506
1599
_exit(EX_OSERR);
1507
1600
}
1508
1601
char *delaystring;
1509
ret = asprintf(&delaystring, "%f", delay);
1602
ret = asprintf(&delaystring, "%f", (double)delay);
1510
1603
if(ret == -1){
1511
1604
perror_plus("asprintf");
1512
1605
_exit(EX_OSERR);
1565
1658
}
1566
1659
close(devnull);
1567
1660
}
1568
return true;
1569
1661
}
1570
1662
1663
__attribute__((nonnull, warn_unused_result))
1571
1664
error_t bring_up_interface(const char *const interface,
1572
1665
const float delay){
1573
int sd = -1;
1574
1666
error_t old_errno = errno;
1575
error_t ret_errno = 0;
1576
int ret, ret_setflags;
1667
int ret;
1577
1668
struct ifreq network;
1578
1669
unsigned int if_index = if_nametoindex(interface);
1579
1670
if(if_index == 0){
1588
1679
}
1589
1680
1590
1681
if(not interface_is_up(interface)){
1591
if(not get_flags(interface, &network) and debug){
1682
error_t ret_errno = 0, ioctl_errno = 0;
1683
if(not get_flags(interface, &network)){
1592
1684
ret_errno = errno;
1593
1685
fprintf_plus(stderr, "Failed to get flags for interface "
1594
1686
"\"%s\"\n", interface);
1687
errno = old_errno;
1595
1688
return ret_errno;
1596
1689
}
1597
network.ifr_flags |= IFF_UP;
1690
network.ifr_flags |= IFF_UP; /* set flag */
1598
1691
1599
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1600
if(sd < 0){
1692
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1693
if(sd == -1){
1601
1694
ret_errno = errno;
1602
1695
perror_plus("socket");
1603
1696
errno = old_errno;
1604
1697
return ret_errno;
1605
1698
}
1606
1699
1607
1700
if(quit_now){
1608
close(sd);
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1702
if(ret == -1){
1703
perror_plus("close");
1704
}
1609
1705
errno = old_errno;
1610
1706
return EINTR;
1611
1707
}
1615
1711
interface);
1616
1712
}
1617
1713
1618
/* Raise priviliges */
1619
raise_privileges();
1620
1714
/* Raise privileges */
1715
ret_errno = raise_privileges();
1716
bool restore_loglevel = false;
1717
if(ret_errno != 0){
1718
perror_plus("Failed to raise privileges");
1719
}
1621
1720
#ifdef __linux__
1622
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1623
messages about the network interface to mess up the prompt */
1624
int ret_linux = klogctl(8, NULL, 5);
1625
bool restore_loglevel = true;
1626
if(ret_linux == -1){
1627
restore_loglevel = false;
1628
perror_plus("klogctl");
1721
int ret_linux;
1722
if(ret_errno == 0){
1723
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1724
messages about the network interface to mess up the prompt */
1725
ret_linux = klogctl(8, NULL, 5);
1726
if(ret_linux == -1){
1727
perror_plus("klogctl");
1728
} else {
1729
restore_loglevel = true;
1730
}
1629
1731
}
1630
1732
#endif /* __linux__ */
1631
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1632
ret_errno = errno;
1733
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1734
ioctl_errno = errno;
1633
1735
#ifdef __linux__
1634
1736
if(restore_loglevel){
1635
1737
ret_linux = klogctl(7, NULL, 0);
1639
1741
}
1640
1742
#endif /* __linux__ */
1641
1743
1642
/* Lower privileges */
1643
lower_privileges();
1744
/* If raise_privileges() succeeded above */
1745
if(ret_errno == 0){
1746
/* Lower privileges */
1747
ret_errno = lower_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to lower privileges");
1751
}
1752
}
1644
1753
1645
1754
/* Close the socket */
1646
1755
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1649
1758
}
1650
1759
1651
1760
if(ret_setflags == -1){
1652
errno = ret_errno;
1761
errno = ioctl_errno;
1653
1762
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1654
1763
errno = old_errno;
1655
return ret_errno;
1764
return ioctl_errno;
1656
1765
}
1657
1766
} else if(debug){
1658
1767
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1676
1785
return 0;
1677
1786
}
1678
1787
1788
__attribute__((nonnull, warn_unused_result))
1679
1789
error_t take_down_interface(const char *const interface){
1680
int sd = -1;
1681
1790
error_t old_errno = errno;
1682
error_t ret_errno = 0;
1683
int ret, ret_setflags;
1684
1791
struct ifreq network;
1685
1792
unsigned int if_index = if_nametoindex(interface);
1686
1793
if(if_index == 0){
1689
1796
return ENXIO;
1690
1797
}
1691
1798
if(interface_is_up(interface)){
1799
error_t ret_errno = 0, ioctl_errno = 0;
1692
1800
if(not get_flags(interface, &network) and debug){
1693
1801
ret_errno = errno;
1694
1802
fprintf_plus(stderr, "Failed to get flags for interface "
1695
1803
"\"%s\"\n", interface);
1804
errno = old_errno;
1696
1805
return ret_errno;
1697
1806
}
1698
1807
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1699
1808
1700
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1701
if(sd < 0){
1809
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1810
if(sd == -1){
1702
1811
ret_errno = errno;
1703
1812
perror_plus("socket");
1704
1813
errno = old_errno;
1710
1819
interface);
1711
1820
}
1712
1821
1713
/* Raise priviliges */
1714
raise_privileges();
1715
1716
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1717
ret_errno = errno;
1718
1719
/* Lower privileges */
1720
lower_privileges();
1822
/* Raise privileges */
1823
ret_errno = raise_privileges();
1824
if(ret_errno != 0){
1825
perror_plus("Failed to raise privileges");
1826
}
1827
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1828
ioctl_errno = errno;
1829
1830
/* If raise_privileges() succeeded above */
1831
if(ret_errno == 0){
1832
/* Lower privileges */
1833
ret_errno = lower_privileges();
1834
if(ret_errno != 0){
1835
errno = ret_errno;
1836
perror_plus("Failed to lower privileges");
1837
}
1838
}
1721
1839
1722
1840
/* Close the socket */
1723
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1841
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1724
1842
if(ret == -1){
1725
1843
perror_plus("close");
1726
1844
}
1727
1845
1728
1846
if(ret_setflags == -1){
1729
errno = ret_errno;
1847
errno = ioctl_errno;
1730
1848
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1731
1849
errno = old_errno;
1732
return ret_errno;
1850
return ioctl_errno;
1733
1851
}
1734
1852
} else if(debug){
1735
1853
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1741
1859
}
1742
1860
1743
1861
int main(int argc, char *argv[]){
1862
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1863
.priority = "SECURE256:!CTYPE-X.509:"
1864
"+CTYPE-OPENPGP", .current_server = NULL,
1865
.interfaces = NULL, .interfaces_size = 0 };
1744
1866
AvahiSServiceBrowser *sb = NULL;
1745
1867
error_t ret_errno;
1746
1868
int ret;
1747
1869
intmax_t tmpmax;
1748
1870
char *tmp;
1749
1871
int exitcode = EXIT_SUCCESS;
1750
char *interfaces = NULL;
1751
size_t interfaces_size = 0;
1752
1872
char *interfaces_to_take_down = NULL;
1753
1873
size_t interfaces_to_take_down_size = 0;
1754
1874
char tempdir[] = "/tmp/mandosXXXXXX";
1757
1877
const char *seckey = PATHDIR "/" SECKEY;
1758
1878
const char *pubkey = PATHDIR "/" PUBKEY;
1759
1879
char *interfaces_hooks = NULL;
1760
size_t interfaces_hooks_size = 0;
1761
1880
1762
1881
bool gnutls_initialized = false;
1763
1882
bool gpgme_initialized = false;
1854
1973
connect_to = arg;
1855
1974
break;
1856
1975
case 'i': /* --interface */
1857
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1858
(int)',');
1976
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1977
arg, (int)',');
1859
1978
if(ret_errno != 0){
1860
1979
argp_error(state, "%s", strerror(ret_errno));
1861
1980
}
1941
2060
/* Work around Debian bug #633582:
1942
2061
<http://bugs.debian.org/633582> */
1943
2062
1944
/* Re-raise priviliges */
1945
if(raise_privileges() == 0){
2063
/* Re-raise privileges */
2064
ret_errno = raise_privileges();
2065
if(ret_errno != 0){
2066
errno = ret_errno;
2067
perror_plus("Failed to raise privileges");
2068
} else {
1946
2069
struct stat st;
1947
2070
1948
2071
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1988
2111
}
1989
2112
1990
2113
/* Lower privileges */
1991
errno = 0;
1992
ret = seteuid(uid);
1993
if(ret == -1){
1994
perror_plus("seteuid");
2114
ret_errno = lower_privileges();
2115
if(ret_errno != 0){
2116
errno = ret_errno;
2117
perror_plus("Failed to lower privileges");
1995
2118
}
1996
2119
}
1997
2120
}
1998
2121
1999
/* Remove empty interface names */
2122
/* Remove invalid interface names (except "none") */
2000
2123
{
2001
2124
char *interface = NULL;
2002
while((interface = argz_next(interfaces, interfaces_size,
2125
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2003
2126
interface))){
2004
if(if_nametoindex(interface) == 0){
2005
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2127
if(strcmp(interface, "none") != 0
2128
and if_nametoindex(interface) == 0){
2129
if(interface[0] != '\0'){
2006
2130
fprintf_plus(stderr, "Not using nonexisting interface"
2007
2131
" \"%s\"\n", interface);
2008
2132
}
2009
argz_delete(&interfaces, &interfaces_size, interface);
2133
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2010
2134
interface = NULL;
2011
2135
}
2012
2136
}
2014
2138
2015
2139
/* Run network hooks */
2016
2140
{
2017
ret_errno = argz_append(&interfaces_hooks, &interfaces_hooks_size,
2018
interfaces, interfaces_size);
2019
if(ret_errno != 0){
2020
errno = ret_errno;
2021
perror_plus("argz_append");
2022
goto end;
2023
}
2024
argz_stringify(interfaces_hooks, interfaces_hooks_size, (int)',');
2025
if(not run_network_hooks("start", interfaces_hooks, delay)){
2026
goto end;
2027
}
2141
if(mc.interfaces != NULL){
2142
interfaces_hooks = malloc(mc.interfaces_size);
2143
if(interfaces_hooks == NULL){
2144
perror_plus("malloc");
2145
goto end;
2146
}
2147
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2148
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2149
}
2150
run_network_hooks("start", interfaces_hooks != NULL ?
2151
interfaces_hooks : "", delay);
2028
2152
}
2029
2153
2030
2154
if(not debug){
2035
2159
from the signal handler */
2036
2160
/* Initialize the pseudo-RNG for Avahi */
2037
2161
srand((unsigned int) time(NULL));
2038
mc.simple_poll = avahi_simple_poll_new();
2039
if(mc.simple_poll == NULL){
2162
simple_poll = avahi_simple_poll_new();
2163
if(simple_poll == NULL){
2040
2164
fprintf_plus(stderr,
2041
2165
"Avahi: Failed to create simple poll object.\n");
2042
2166
exitcode = EX_UNAVAILABLE;
2107
2231
}
2108
2232
2109
2233
/* If no interfaces were specified, make a list */
2110
if(interfaces == NULL){
2234
if(mc.interfaces == NULL){
2111
2235
struct dirent **direntries;
2112
2236
/* Look for any good interfaces */
2113
2237
ret = scandir(sys_class_net, &direntries, good_interface,
2115
2239
if(ret >= 1){
2116
2240
/* Add all found interfaces to interfaces list */
2117
2241
for(int i = 0; i < ret; ++i){
2118
ret_errno = argz_add(&interfaces, &interfaces_size,
2242
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2119
2243
direntries[i]->d_name);
2120
2244
if(ret_errno != 0){
2245
errno = ret_errno;
2121
2246
perror_plus("argz_add");
2122
2247
continue;
2123
2248
}
2135
2260
}
2136
2261
}
2137
2262
2138
/* If we only got one interface, explicitly use only that one */
2139
if(argz_count(interfaces, interfaces_size) == 1){
2140
if(debug){
2141
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2142
interfaces);
2143
}
2144
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2145
}
2146
2147
/* Bring up interfaces which are down */
2148
if(not (argz_count(interfaces, interfaces_size) == 1
2149
and strcmp(interfaces, "none") == 0)){
2263
/* Bring up interfaces which are down, and remove any "none"s */
2264
{
2150
2265
char *interface = NULL;
2151
while((interface = argz_next(interfaces, interfaces_size,
2266
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2152
2267
interface))){
2268
/* If interface name is "none", stop bringing up interfaces.
2269
Also remove all instances of "none" from the list */
2270
if(strcmp(interface, "none") == 0){
2271
argz_delete(&mc.interfaces, &mc.interfaces_size,
2272
interface);
2273
interface = NULL;
2274
while((interface = argz_next(mc.interfaces,
2275
mc.interfaces_size, interface))){
2276
if(strcmp(interface, "none") == 0){
2277
argz_delete(&mc.interfaces, &mc.interfaces_size,
2278
interface);
2279
interface = NULL;
2280
}
2281
}
2282
break;
2283
}
2153
2284
bool interface_was_up = interface_is_up(interface);
2154
ret = bring_up_interface(interface, delay);
2285
errno = bring_up_interface(interface, delay);
2155
2286
if(not interface_was_up){
2156
if(ret != 0){
2157
errno = ret;
2287
if(errno != 0){
2158
2288
perror_plus("Failed to bring up interface");
2159
2289
} else {
2160
ret_errno = argz_add(&interfaces_to_take_down,
2161
&interfaces_to_take_down_size,
2162
interface);
2290
errno = argz_add(&interfaces_to_take_down,
2291
&interfaces_to_take_down_size,
2292
interface);
2293
if(errno != 0){
2294
perror_plus("argz_add");
2295
}
2163
2296
}
2164
2297
}
2165
2298
}
2166
free(interfaces);
2167
interfaces = NULL;
2168
interfaces_size = 0;
2169
2299
if(debug and (interfaces_to_take_down == NULL)){
2170
2300
fprintf_plus(stderr, "No interfaces were brought up\n");
2171
2301
}
2172
2302
}
2173
2303
2304
/* If we only got one interface, explicitly use only that one */
2305
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2306
if(debug){
2307
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2308
mc.interfaces);
2309
}
2310
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2311
}
2312
2174
2313
if(quit_now){
2175
2314
goto end;
2176
2315
}
2177
2316
2178
ret = init_gnutls_global(pubkey, seckey);
2317
ret = init_gnutls_global(pubkey, seckey, &mc);
2179
2318
if(ret == -1){
2180
2319
fprintf_plus(stderr, "init_gnutls_global failed\n");
2181
2320
exitcode = EX_UNAVAILABLE;
2198
2337
goto end;
2199
2338
}
2200
2339
2201
if(not init_gpgme(pubkey, seckey, tempdir)){
2340
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2202
2341
fprintf_plus(stderr, "init_gpgme failed\n");
2203
2342
exitcode = EX_UNAVAILABLE;
2204
2343
goto end;
2225
2364
goto end;
2226
2365
}
2227
2366
2228
uint16_t port;
2367
in_port_t port;
2229
2368
errno = 0;
2230
2369
tmpmax = strtoimax(address+1, &tmp, 10);
2231
2370
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2232
or tmpmax != (uint16_t)tmpmax){
2371
or tmpmax != (in_port_t)tmpmax){
2233
2372
fprintf_plus(stderr, "Bad port number\n");
2234
2373
exitcode = EX_USAGE;
2235
2374
goto end;
2236
2375
}
2237
2376
2238
2377
if(quit_now){
2239
2378
goto end;
2240
2379
}
2241
2380
2242
port = (uint16_t)tmpmax;
2381
port = (in_port_t)tmpmax;
2243
2382
*address = '\0';
2244
2383
/* Colon in address indicates IPv6 */
2245
2384
int af;
2261
2400
}
2262
2401
2263
2402
while(not quit_now){
2264
ret = start_mandos_communication(address, port, if_index, af);
2403
ret = start_mandos_communication(address, port, if_index, af,
2404
&mc);
2265
2405
if(quit_now or ret == 0){
2266
2406
break;
2267
2407
}
2269
2409
fprintf_plus(stderr, "Retrying in %d seconds\n",
2270
2410
(int)retry_interval);
2271
2411
}
2272
sleep((int)retry_interval);
2412
sleep((unsigned int)retry_interval);
2273
2413
}
2274
2414
2275
if (not quit_now){
2415
if(not quit_now){
2276
2416
exitcode = EXIT_SUCCESS;
2277
2417
}
2278
2418
2293
2433
config.publish_domain = 0;
2294
2434
2295
2435
/* Allocate a new server */
2296
mc.server = avahi_server_new(avahi_simple_poll_get
2297
(mc.simple_poll), &config, NULL,
2298
NULL, &ret_errno);
2436
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2437
&config, NULL, NULL, &ret_errno);
2299
2438
2300
2439
/* Free the Avahi configuration data */
2301
2440
avahi_server_config_free(&config);
2316
2455
/* Create the Avahi service browser */
2317
2456
sb = avahi_s_service_browser_new(mc.server, if_index,
2318
2457
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2319
NULL, 0, browse_callback, NULL);
2458
NULL, 0, browse_callback,
2459
(void *)&mc);
2320
2460
if(sb == NULL){
2321
2461
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2322
2462
avahi_strerror(avahi_server_errno(mc.server)));
2334
2474
fprintf_plus(stderr, "Starting Avahi loop search\n");
2335
2475
}
2336
2476
2337
ret = avahi_loop_with_timeout(mc.simple_poll,
2338
(int)(retry_interval * 1000));
2477
ret = avahi_loop_with_timeout(simple_poll,
2478
(int)(retry_interval * 1000), &mc);
2339
2479
if(debug){
2340
2480
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2341
2481
(ret == 0) ? "successfully" : "with error");
2348
2488
}
2349
2489
2350
2490
/* Cleanup things */
2491
free(mc.interfaces);
2492
2351
2493
if(sb != NULL)
2352
2494
avahi_s_service_browser_free(sb);
2353
2495
2354
2496
if(mc.server != NULL)
2355
2497
avahi_server_free(mc.server);
2356
2498
2357
if(mc.simple_poll != NULL)
2358
avahi_simple_poll_free(mc.simple_poll);
2499
if(simple_poll != NULL)
2500
avahi_simple_poll_free(simple_poll);
2359
2501
2360
2502
if(gnutls_initialized){
2361
2503
gnutls_certificate_free_credentials(mc.cred);
2378
2520
}
2379
2521
}
2380
2522
2381
/* Re-raise priviliges */
2523
/* Re-raise privileges */
2382
2524
{
2383
raise_privileges();
2384
2385
/* Run network hooks */
2386
run_network_hooks("stop", interfaces_hooks, delay);
2387
2388
/* Take down the network interfaces which were brought up */
2389
{
2390
char *interface = NULL;
2391
while((interface=argz_next(interfaces_to_take_down,
2392
interfaces_to_take_down_size,
2393
interface))){
2394
ret_errno = take_down_interface(interface);
2395
if(ret_errno != 0){
2396
errno = ret_errno;
2397
perror_plus("Failed to take down interface");
2398
}
2399
}
2400
if(debug and (interfaces_to_take_down == NULL)){
2401
fprintf_plus(stderr, "No interfaces needed to be taken"
2402
" down\n");
2403
}
2404
}
2405
2406
lower_privileges_permanently();
2525
ret_errno = raise_privileges();
2526
if(ret_errno != 0){
2527
perror_plus("Failed to raise privileges");
2528
} else {
2529
2530
/* Run network hooks */
2531
run_network_hooks("stop", interfaces_hooks != NULL ?
2532
interfaces_hooks : "", delay);
2533
2534
/* Take down the network interfaces which were brought up */
2535
{
2536
char *interface = NULL;
2537
while((interface=argz_next(interfaces_to_take_down,
2538
interfaces_to_take_down_size,
2539
interface))){
2540
ret_errno = take_down_interface(interface);
2541
if(ret_errno != 0){
2542
errno = ret_errno;
2543
perror_plus("Failed to take down interface");
2544
}
2545
}
2546
if(debug and (interfaces_to_take_down == NULL)){
2547
fprintf_plus(stderr, "No interfaces needed to be taken"
2548
" down\n");
2549
}
2550
}
2551
}
2552
ret_errno = lower_privileges_permanently();
2553
if(ret_errno != 0){
2554
perror_plus("Failed to lower privileges permanently");
2555
}
2407
2556
}
2408
2557
2409
2558
free(interfaces_to_take_down);
2415
2564
struct dirent *direntry = NULL;
2416
2565
int numentries = scandir(tempdir, &direntries, notdotentries,
2417
2566
alphasort);
2418
if (numentries > 0){
2567
if(numentries > 0){
2419
2568
for(int i = 0; i < numentries; i++){
2420
2569
direntry = direntries[i];
2421
2570
char *fullname = NULL;
2436
2585
2437
2586
/* need to clean even if 0 because man page doesn't specify */
2438
2587
free(direntries);
2439
if (numentries == -1){
2588
if(numentries == -1){
2440
2589
perror_plus("scandir");
2441
2590
}
2442
2591
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0