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- Committer: Teddy Hogeborn
- Date: 2009-09-07 23:48:17 UTC
- Revision ID: teddy@fukt.bsnet.se-20090907234817-op1lgg9gpruejsiv
* initramfs-tools-hook: Bug fix: Really install user-supplied plugins.
Bug fix: Warn about empty plugin directory.
Bug fix: Warn about empty plugin directory.
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 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
43
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
70
69
if_nametoindex(), IF_NAMESIZE */
72
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
74
getuid(), getgid(), setuid(),
75
setgid() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
83
82
#include <signal.h> /* sigemptyset(), sigaddset(),
84
83
sigaction(), SIGTERM, sig_atomic_t,
85
84
raise() */
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
85
89
86
#ifdef __linux__
90
87
#include <sys/klog.h> /* klogctl() */
128
125
static const char mandos_protocol_version[] = "1";
129
126
const char *argp_program_version = "mandos-client " VERSION;
130
127
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
131
static const char sys_class_net[] = "/sys/class/net";
132
char *connect_to = NULL;
133
134
/* Doubly linked list that need to be circularly linked when used */
135
typedef struct server{
136
const char *ip;
137
uint16_t port;
138
AvahiIfIndex if_index;
139
int af;
140
struct timespec last_seen;
141
struct server *next;
142
struct server *prev;
143
} server;
144
128
145
129
/* Used for passing in values through the Avahi callback functions */
146
130
typedef struct {
151
135
gnutls_dh_params_t dh_params;
152
136
const char *priority;
153
137
gpgme_ctx_t ctx;
154
server *current_server;
155
138
} mandos_context;
156
139
157
140
/* global context so signal handler can reach it*/
158
141
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
142
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
162
163
sig_atomic_t quit_now = 0;
164
int signal_received = 0;
165
166
/* Function to use when printing errors */
167
void perror_plus(const char *print_text){
168
fprintf(stderr, "Mandos plugin %s: ",
169
program_invocation_short_name);
170
perror(print_text);
171
}
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
172
144
173
145
/*
174
146
* Make additional room in "buffer" for at least BUFFER_SIZE more
187
159
return buffer_capacity;
188
160
}
189
161
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
193
int ret;
194
server *new_server = malloc(sizeof(server));
195
if(new_server == NULL){
196
perror_plus("malloc");
197
return -1;
198
}
199
*new_server = (server){ .ip = strdup(ip),
200
.port = port,
201
.if_index = if_index,
202
.af = af };
203
if(new_server->ip == NULL){
204
perror_plus("strdup");
205
return -1;
206
}
207
/* unique case of first server */
208
if (mc.current_server == NULL){
209
new_server->next = new_server;
210
new_server->prev = new_server;
211
mc.current_server = new_server;
212
/* Placing the new server last in the list */
213
} else {
214
new_server->next = mc.current_server;
215
new_server->prev = mc.current_server->prev;
216
new_server->prev->next = new_server;
217
mc.current_server->prev = new_server;
218
}
219
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
220
if(ret == -1){
221
perror_plus("clock_gettime");
222
return -1;
223
}
224
return 0;
225
}
226
227
162
/*
228
163
* Initialize GPGME.
229
164
*/
243
178
244
179
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
245
180
if(fd == -1){
246
perror_plus("open");
181
perror("open");
247
182
return false;
248
183
}
249
184
263
198
264
199
ret = (int)TEMP_FAILURE_RETRY(close(fd));
265
200
if(ret == -1){
266
perror_plus("close");
201
perror("close");
267
202
}
268
203
gpgme_data_release(pgp_data);
269
204
return true;
394
329
395
330
/* Seek back to the beginning of the GPGME plaintext data buffer */
396
331
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
397
perror_plus("gpgme_data_seek");
332
perror("gpgme_data_seek");
398
333
plaintext_length = -1;
399
334
goto decrypt_end;
400
335
}
405
340
(size_t)plaintext_length,
406
341
plaintext_capacity);
407
342
if(plaintext_capacity == 0){
408
perror_plus("incbuffer");
343
perror("incbuffer");
409
344
plaintext_length = -1;
410
345
goto decrypt_end;
411
346
}
418
353
break;
419
354
}
420
355
if(ret < 0){
421
perror_plus("gpgme_data_read");
356
perror("gpgme_data_read");
422
357
plaintext_length = -1;
423
358
goto decrypt_end;
424
359
}
481
416
}
482
417
483
418
/* OpenPGP credentials */
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
419
gnutls_certificate_allocate_credentials(&mc.cred);
485
420
if(ret != GNUTLS_E_SUCCESS){
486
fprintf(stderr, "GnuTLS memory error: %s\n",
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
487
425
safer_gnutls_strerror(ret));
488
426
gnutls_global_deinit();
489
427
return -1;
536
474
static int init_gnutls_session(gnutls_session_t *session){
537
475
int ret;
538
476
/* GnuTLS session creation */
539
do {
540
ret = gnutls_init(session, GNUTLS_SERVER);
541
if(quit_now){
542
return -1;
543
}
544
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
477
ret = gnutls_init(session, GNUTLS_SERVER);
545
478
if(ret != GNUTLS_E_SUCCESS){
546
479
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
547
480
safer_gnutls_strerror(ret));
549
482
550
483
{
551
484
const char *err;
552
do {
553
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
554
if(quit_now){
555
gnutls_deinit(*session);
556
return -1;
557
}
558
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
559
486
if(ret != GNUTLS_E_SUCCESS){
560
487
fprintf(stderr, "Syntax error at: %s\n", err);
561
488
fprintf(stderr, "GnuTLS error: %s\n",
565
492
}
566
493
}
567
494
568
do {
569
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
570
mc.cred);
571
if(quit_now){
572
gnutls_deinit(*session);
573
return -1;
574
}
575
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
576
497
if(ret != GNUTLS_E_SUCCESS){
577
498
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
578
499
safer_gnutls_strerror(ret));
581
502
}
582
503
583
504
/* ignore client certificate if any. */
584
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
505
gnutls_certificate_server_set_request(*session,
506
GNUTLS_CERT_IGNORE);
585
507
586
508
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
587
509
592
514
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
593
515
__attribute__((unused)) const char *txt){}
594
516
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
595
520
/* Called when a Mandos server is found */
596
521
static int start_mandos_communication(const char *ip, uint16_t port,
597
522
AvahiIfIndex if_index,
603
528
struct sockaddr_in6 in6;
604
529
} to;
605
530
char *buffer = NULL;
606
char *decrypted_buffer = NULL;
531
char *decrypted_buffer;
607
532
size_t buffer_length = 0;
608
533
size_t buffer_capacity = 0;
609
534
size_t written;
610
int retval = -1;
535
int retval = 0;
611
536
gnutls_session_t session;
612
537
int pf; /* Protocol family */
613
538
614
errno = 0;
615
616
539
if(quit_now){
617
errno = EINTR;
618
540
return -1;
619
541
}
620
542
627
549
break;
628
550
default:
629
551
fprintf(stderr, "Bad address family: %d\n", af);
630
errno = EINVAL;
631
552
return -1;
632
553
}
633
554
643
564
644
565
tcp_sd = socket(pf, SOCK_STREAM, 0);
645
566
if(tcp_sd < 0){
646
int e = errno;
647
perror_plus("socket");
648
errno = e;
567
perror("socket");
568
retval = -1;
649
569
goto mandos_end;
650
570
}
651
571
652
572
if(quit_now){
653
errno = EINTR;
654
573
goto mandos_end;
655
574
}
656
575
663
582
ret = inet_pton(af, ip, &to.in.sin_addr);
664
583
}
665
584
if(ret < 0 ){
666
int e = errno;
667
perror_plus("inet_pton");
668
errno = e;
585
perror("inet_pton");
586
retval = -1;
669
587
goto mandos_end;
670
588
}
671
589
if(ret == 0){
672
int e = errno;
673
590
fprintf(stderr, "Bad address: %s\n", ip);
674
errno = e;
591
retval = -1;
675
592
goto mandos_end;
676
593
}
677
594
if(af == AF_INET6){
685
602
if(if_index == AVAHI_IF_UNSPEC){
686
603
fprintf(stderr, "An IPv6 link-local address is incomplete"
687
604
" without a network interface\n");
688
errno = EINVAL;
605
retval = -1;
689
606
goto mandos_end;
690
607
}
691
608
/* Set the network interface number as scope */
698
615
}
699
616
700
617
if(quit_now){
701
errno = EINTR;
702
618
goto mandos_end;
703
619
}
704
620
706
622
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
707
623
char interface[IF_NAMESIZE];
708
624
if(if_indextoname((unsigned int)if_index, interface) == NULL){
709
perror_plus("if_indextoname");
625
perror("if_indextoname");
710
626
} else {
711
627
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
712
628
ip, interface, port);
726
642
sizeof(addrstr));
727
643
}
728
644
if(pcret == NULL){
729
perror_plus("inet_ntop");
645
perror("inet_ntop");
730
646
} else {
731
647
if(strcmp(addrstr, ip) != 0){
732
648
fprintf(stderr, "Canonical address form: %s\n", addrstr);
735
651
}
736
652
737
653
if(quit_now){
738
errno = EINTR;
739
654
goto mandos_end;
740
655
}
741
656
745
660
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
746
661
}
747
662
if(ret < 0){
748
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
749
int e = errno;
750
perror_plus("connect");
751
errno = e;
752
}
663
perror("connect");
664
retval = -1;
753
665
goto mandos_end;
754
666
}
755
667
756
668
if(quit_now){
757
errno = EINTR;
758
669
goto mandos_end;
759
670
}
760
671
765
676
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
766
677
out_size - written));
767
678
if(ret == -1){
768
int e = errno;
769
perror_plus("write");
770
errno = e;
679
perror("write");
680
retval = -1;
771
681
goto mandos_end;
772
682
}
773
683
written += (size_t)ret;
783
693
}
784
694
785
695
if(quit_now){
786
errno = EINTR;
787
696
goto mandos_end;
788
697
}
789
698
}
793
702
}
794
703
795
704
if(quit_now){
796
errno = EINTR;
797
705
goto mandos_end;
798
706
}
799
707
800
/* Spurious warning from -Wint-to-pointer-cast */
801
708
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
802
709
803
710
if(quit_now){
804
errno = EINTR;
805
711
goto mandos_end;
806
712
}
807
713
808
714
do {
809
715
ret = gnutls_handshake(session);
810
716
if(quit_now){
811
errno = EINTR;
812
717
goto mandos_end;
813
718
}
814
719
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
818
723
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
819
724
gnutls_perror(ret);
820
725
}
821
errno = EPROTO;
726
retval = -1;
822
727
goto mandos_end;
823
728
}
824
729
832
737
while(true){
833
738
834
739
if(quit_now){
835
errno = EINTR;
836
740
goto mandos_end;
837
741
}
838
742
839
743
buffer_capacity = incbuffer(&buffer, buffer_length,
840
744
buffer_capacity);
841
745
if(buffer_capacity == 0){
842
int e = errno;
843
perror_plus("incbuffer");
844
errno = e;
746
perror("incbuffer");
747
retval = -1;
845
748
goto mandos_end;
846
749
}
847
750
848
751
if(quit_now){
849
errno = EINTR;
850
752
goto mandos_end;
851
753
}
852
754
865
767
ret = gnutls_handshake(session);
866
768
867
769
if(quit_now){
868
errno = EINTR;
869
770
goto mandos_end;
870
771
}
871
772
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
872
773
if(ret < 0){
873
774
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
874
775
gnutls_perror(ret);
875
errno = EPROTO;
776
retval = -1;
876
777
goto mandos_end;
877
778
}
878
779
break;
879
780
default:
880
781
fprintf(stderr, "Unknown error while reading data from"
881
782
" encrypted session with Mandos server\n");
783
retval = -1;
882
784
gnutls_bye(session, GNUTLS_SHUT_RDWR);
883
errno = EIO;
884
785
goto mandos_end;
885
786
}
886
787
} else {
893
794
}
894
795
895
796
if(quit_now){
896
errno = EINTR;
897
goto mandos_end;
898
}
899
900
do {
901
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
902
if(quit_now){
903
errno = EINTR;
904
goto mandos_end;
905
}
906
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
797
goto mandos_end;
798
}
799
800
gnutls_bye(session, GNUTLS_SHUT_RDWR);
801
802
if(quit_now){
803
goto mandos_end;
804
}
907
805
908
806
if(buffer_length > 0){
909
807
ssize_t decrypted_buffer_size;
915
813
written = 0;
916
814
while(written < (size_t) decrypted_buffer_size){
917
815
if(quit_now){
918
errno = EINTR;
919
816
goto mandos_end;
920
817
}
921
818
923
820
(size_t)decrypted_buffer_size - written,
924
821
stdout);
925
822
if(ret == 0 and ferror(stdout)){
926
int e = errno;
927
823
if(debug){
928
824
fprintf(stderr, "Error writing encrypted data: %s\n",
929
825
strerror(errno));
930
826
}
931
errno = e;
932
goto mandos_end;
827
retval = -1;
828
break;
933
829
}
934
830
written += (size_t)ret;
935
831
}
936
retval = 0;
832
free(decrypted_buffer);
833
} else {
834
retval = -1;
937
835
}
836
} else {
837
retval = -1;
938
838
}
939
839
940
840
/* Shutdown procedure */
941
841
942
842
mandos_end:
943
{
944
int e = errno;
945
free(decrypted_buffer);
946
free(buffer);
947
if(tcp_sd >= 0){
948
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
949
}
950
if(ret == -1){
951
if(e == 0){
952
e = errno;
953
}
954
perror_plus("close");
955
}
956
gnutls_deinit(session);
957
errno = e;
958
if(quit_now){
959
errno = EINTR;
960
retval = -1;
961
}
843
free(buffer);
844
if(tcp_sd >= 0){
845
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
846
}
847
if(ret == -1){
848
perror("close");
849
}
850
gnutls_deinit(session);
851
if(quit_now){
852
retval = -1;
962
853
}
963
854
return retval;
964
855
}
1007
898
avahi_proto_to_af(proto));
1008
899
if(ret == 0){
1009
900
avahi_simple_poll_quit(mc.simple_poll);
1010
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
1013
901
}
1014
902
}
1015
903
}
1069
957
}
1070
958
}
1071
959
1072
/* Signal handler that stops main loop after SIGTERM */
960
/* stop main loop after sigterm has been called */
1073
961
static void handle_sigterm(int sig){
1074
962
if(quit_now){
1075
963
return;
1077
965
quit_now = 1;
1078
966
signal_received = sig;
1079
967
int old_errno = errno;
1080
/* set main loop to exit */
1081
968
if(mc.simple_poll != NULL){
1082
969
avahi_simple_poll_quit(mc.simple_poll);
1083
970
}
1084
971
errno = old_errno;
1085
972
}
1086
973
1087
/*
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1091
*/
1092
int good_interface(const struct dirent *if_entry){
1093
ssize_t ssret;
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1096
return 0;
1097
}
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1099
if_entry->d_name);
1100
if(ret < 0){
1101
perror_plus("asprintf");
1102
return 0;
1103
}
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1105
if(flags_fd == -1){
1106
perror_plus("open");
1107
free(flagname);
1108
return 0;
1109
}
1110
free(flagname);
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1118
close(flags_fd);
1119
return 0;
1120
}
1121
while(to_read > 0){
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1123
(size_t)to_read));
1124
if(ssret == -1){
1125
perror_plus("read");
1126
free(flagstring);
1127
close(flags_fd);
1128
return 0;
1129
}
1130
to_read -= ssret;
1131
if(ssret == 0){
1132
break;
1133
}
1134
}
1135
close(flags_fd);
1136
intmax_t tmpmax;
1137
char *tmp;
1138
errno = 0;
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1143
if(debug){
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1146
}
1147
free(flagstring);
1148
return 0;
1149
}
1150
free(flagstring);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1154
if(debug){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1156
if_entry->d_name);
1157
}
1158
return 0;
1159
}
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1162
if(debug){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1164
if_entry->d_name);
1165
}
1166
return 1;
1167
}
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1170
if(debug){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1172
if_entry->d_name);
1173
}
1174
return 0;
1175
}
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1178
if(debug){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1181
}
1182
return 0;
1183
}
1184
/* Accept this device */
1185
if(debug){
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1187
if_entry->d_name);
1188
}
1189
return 1;
1190
}
1191
1192
int notdotentries(const struct dirent *direntry){
1193
/* Skip "." and ".." */
1194
if(direntry->d_name[0] == '.'
1195
and (direntry->d_name[1] == '\0'
1196
or (direntry->d_name[1] == '.'
1197
and direntry->d_name[2] == '\0'))){
1198
return 0;
1199
}
1200
return 1;
1201
}
1202
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1204
int ret;
1205
struct timespec now;
1206
struct timespec waited_time;
1207
intmax_t block_time;
1208
1209
while(true){
1210
if(mc.current_server == NULL){
1211
if (debug){
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1214
}
1215
ret = avahi_simple_poll_iterate(s, -1);
1216
} else {
1217
if (debug){
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1220
}
1221
/* the current time */
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1223
if(ret == -1){
1224
perror_plus("clock_gettime");
1225
return -1;
1226
}
1227
/* Calculating in ms how long time between now and server
1228
who we visted longest time ago. Now - last seen. */
1229
waited_time.tv_sec = (now.tv_sec
1230
- mc.current_server->last_seen.tv_sec);
1231
waited_time.tv_nsec = (now.tv_nsec
1232
- mc.current_server->last_seen.tv_nsec);
1233
/* total time is 10s/10,000ms.
1234
Converting to s from ms by dividing by 1,000,
1235
and ns to ms by dividing by 1,000,000. */
1236
block_time = ((retry_interval
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1239
1240
if (debug){
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1242
}
1243
1244
if(block_time <= 0){
1245
ret = start_mandos_communication(mc.current_server->ip,
1246
mc.current_server->port,
1247
mc.current_server->if_index,
1248
mc.current_server->af);
1249
if(ret == 0){
1250
avahi_simple_poll_quit(mc.simple_poll);
1251
return 0;
1252
}
1253
ret = clock_gettime(CLOCK_MONOTONIC,
1254
&mc.current_server->last_seen);
1255
if(ret == -1){
1256
perror_plus("clock_gettime");
1257
return -1;
1258
}
1259
mc.current_server = mc.current_server->next;
1260
block_time = 0; /* Call avahi to find new Mandos
1261
servers, but don't block */
1262
}
1263
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1265
}
1266
if(ret != 0){
1267
if (ret > 0 or errno != EINTR) {
1268
return (ret != 1) ? ret : 0;
1269
}
1270
}
1271
}
1272
}
1273
1274
974
int main(int argc, char *argv[]){
1275
975
AvahiSServiceBrowser *sb = NULL;
1276
976
int error;
1278
978
intmax_t tmpmax;
1279
979
char *tmp;
1280
980
int exitcode = EXIT_SUCCESS;
1281
const char *interface = "";
981
const char *interface = "eth0";
1282
982
struct ifreq network;
1283
983
int sd = -1;
1284
984
bool take_down_interface = false;
1285
985
uid_t uid;
1286
986
gid_t gid;
987
char *connect_to = NULL;
1287
988
char tempdir[] = "/tmp/mandosXXXXXX";
1288
989
bool tempdir_created = false;
1289
990
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1293
994
bool gnutls_initialized = false;
1294
995
bool gpgme_initialized = false;
1295
996
float delay = 2.5f;
1296
double retry_interval = 10; /* 10s between trying a server and
1297
retrying the same server again */
1298
997
1299
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
998
struct sigaction old_sigterm_action;
1300
999
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1301
1000
1302
uid = getuid();
1303
gid = getgid();
1304
1305
/* Lower any group privileges we might have, just to be safe */
1306
errno = 0;
1307
ret = setgid(gid);
1308
if(ret == -1){
1309
perror_plus("setgid");
1310
}
1311
1312
/* Lower user privileges (temporarily) */
1313
errno = 0;
1314
ret = seteuid(uid);
1315
if(ret == -1){
1316
perror_plus("seteuid");
1317
}
1318
1319
if(quit_now){
1320
goto end;
1321
}
1322
1323
1001
{
1324
1002
struct argp_option options[] = {
1325
1003
{ .name = "debug", .key = 128,
1354
1032
.arg = "SECONDS",
1355
1033
.doc = "Maximum delay to wait for interface startup",
1356
1034
.group = 2 },
1357
{ .name = "retry", .key = 132,
1358
.arg = "SECONDS",
1359
.doc = "Retry interval used when denied by the mandos server",
1360
.group = 2 },
1361
/*
1362
* These reproduce what we would get without ARGP_NO_HELP
1363
*/
1364
{ .name = "help", .key = '?',
1365
.doc = "Give this help list", .group = -1 },
1366
{ .name = "usage", .key = -3,
1367
.doc = "Give a short usage message", .group = -1 },
1368
{ .name = "version", .key = 'V',
1369
.doc = "Print program version", .group = -1 },
1370
1035
{ .name = NULL }
1371
1036
};
1372
1037
1373
1038
error_t parse_opt(int key, char *arg,
1374
1039
struct argp_state *state){
1375
errno = 0;
1376
1040
switch(key){
1377
1041
case 128: /* --debug */
1378
1042
debug = true;
1394
1058
tmpmax = strtoimax(arg, &tmp, 10);
1395
1059
if(errno != 0 or tmp == arg or *tmp != '\0'
1396
1060
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1397
argp_error(state, "Bad number of DH bits");
1061
fprintf(stderr, "Bad number of DH bits\n");
1062
exit(EXIT_FAILURE);
1398
1063
}
1399
1064
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1400
1065
break;
1405
1070
errno = 0;
1406
1071
delay = strtof(arg, &tmp);
1407
1072
if(errno != 0 or tmp == arg or *tmp != '\0'){
1408
argp_error(state, "Bad delay");
1409
}
1410
case 132: /* --retry */
1411
errno = 0;
1412
retry_interval = strtod(arg, &tmp);
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1414
or (retry_interval * 1000) > INT_MAX){
1415
argp_error(state, "Bad retry interval");
1073
fprintf(stderr, "Bad delay\n");
1074
exit(EXIT_FAILURE);
1416
1075
}
1417
1076
break;
1418
/*
1419
* These reproduce what we would get without ARGP_NO_HELP
1420
*/
1421
case '?': /* --help */
1422
argp_state_help(state, state->out_stream,
1423
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1424
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1425
case -3: /* --usage */
1426
argp_state_help(state, state->out_stream,
1427
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1428
case 'V': /* --version */
1429
fprintf(state->out_stream, "%s\n", argp_program_version);
1430
exit(argp_err_exit_status);
1077
case ARGP_KEY_ARG:
1078
argp_usage(state);
1079
case ARGP_KEY_END:
1431
1080
break;
1432
1081
default:
1433
1082
return ARGP_ERR_UNKNOWN;
1434
1083
}
1435
return errno;
1084
return 0;
1436
1085
}
1437
1086
1438
1087
struct argp argp = { .options = options, .parser = parse_opt,
1439
1088
.args_doc = "",
1440
1089
.doc = "Mandos client -- Get and decrypt"
1441
1090
" passwords from a Mandos server" };
1442
ret = argp_parse(&argp, argc, argv,
1443
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1444
switch(ret){
1445
case 0:
1446
break;
1447
case ENOMEM:
1448
default:
1449
errno = ret;
1450
perror_plus("argp_parse");
1451
exitcode = EX_OSERR;
1452
goto end;
1453
case EINVAL:
1454
exitcode = EX_USAGE;
1455
goto end;
1456
}
1457
}
1458
1459
{
1460
/* Work around Debian bug #633582:
1461
<http://bugs.debian.org/633582> */
1462
struct stat st;
1463
1464
/* Re-raise priviliges */
1465
errno = 0;
1466
ret = seteuid(0);
1467
if(ret == -1){
1468
perror_plus("seteuid");
1469
}
1470
1471
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1472
if(seckey_fd == -1){
1473
perror_plus("open");
1474
} else {
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1476
if(ret == -1){
1477
perror_plus("fstat");
1478
} else {
1479
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1480
ret = fchown(seckey_fd, uid, gid);
1481
if(ret == -1){
1482
perror_plus("fchown");
1483
}
1484
}
1485
}
1486
TEMP_FAILURE_RETRY(close(seckey_fd));
1487
}
1488
1489
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1490
if(pubkey_fd == -1){
1491
perror_plus("open");
1492
} else {
1493
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1494
if(ret == -1){
1495
perror_plus("fstat");
1496
} else {
1497
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1498
ret = fchown(pubkey_fd, uid, gid);
1499
if(ret == -1){
1500
perror_plus("fchown");
1501
}
1502
}
1503
}
1504
TEMP_FAILURE_RETRY(close(pubkey_fd));
1505
}
1506
1507
/* Lower privileges */
1508
errno = 0;
1509
ret = seteuid(uid);
1510
if(ret == -1){
1511
perror_plus("seteuid");
1091
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1092
if(ret == ARGP_ERR_UNKNOWN){
1093
fprintf(stderr, "Unknown error while parsing arguments\n");
1094
exitcode = EXIT_FAILURE;
1095
goto end;
1512
1096
}
1513
1097
}
1514
1098
1515
1099
if(not debug){
1516
1100
avahi_set_log_function(empty_log);
1517
1101
}
1518
1519
if(interface[0] == '\0'){
1520
struct dirent **direntries;
1521
ret = scandir(sys_class_net, &direntries, good_interface,
1522
alphasort);
1523
if(ret >= 1){
1524
/* Pick the first good interface */
1525
interface = strdup(direntries[0]->d_name);
1526
if(debug){
1527
fprintf(stderr, "Using interface \"%s\"\n", interface);
1528
}
1529
if(interface == NULL){
1530
perror_plus("malloc");
1531
free(direntries);
1532
exitcode = EXIT_FAILURE;
1533
goto end;
1534
}
1535
free(direntries);
1536
} else {
1537
free(direntries);
1538
fprintf(stderr, "Could not find a network interface\n");
1539
exitcode = EXIT_FAILURE;
1540
goto end;
1541
}
1542
}
1543
1102
1544
1103
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1545
1104
from the signal handler */
1548
1107
mc.simple_poll = avahi_simple_poll_new();
1549
1108
if(mc.simple_poll == NULL){
1550
1109
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1551
exitcode = EX_UNAVAILABLE;
1110
exitcode = EXIT_FAILURE;
1552
1111
goto end;
1553
1112
}
1554
1113
1555
1114
sigemptyset(&sigterm_action.sa_mask);
1556
1115
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1557
1116
if(ret == -1){
1558
perror_plus("sigaddset");
1559
exitcode = EX_OSERR;
1117
perror("sigaddset");
1118
exitcode = EXIT_FAILURE;
1560
1119
goto end;
1561
1120
}
1562
1121
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1563
1122
if(ret == -1){
1564
perror_plus("sigaddset");
1565
exitcode = EX_OSERR;
1123
perror("sigaddset");
1124
exitcode = EXIT_FAILURE;
1566
1125
goto end;
1567
1126
}
1568
1127
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1569
1128
if(ret == -1){
1570
perror_plus("sigaddset");
1571
exitcode = EX_OSERR;
1129
perror("sigaddset");
1130
exitcode = EXIT_FAILURE;
1572
1131
goto end;
1573
1132
}
1574
1133
/* Need to check if the handler is SIG_IGN before handling:
1577
1136
*/
1578
1137
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1579
1138
if(ret == -1){
1580
perror_plus("sigaction");
1581
return EX_OSERR;
1139
perror("sigaction");
1140
return EXIT_FAILURE;
1582
1141
}
1583
1142
if(old_sigterm_action.sa_handler != SIG_IGN){
1584
1143
ret = sigaction(SIGINT, &sigterm_action, NULL);
1585
1144
if(ret == -1){
1586
perror_plus("sigaction");
1587
exitcode = EX_OSERR;
1145
perror("sigaction");
1146
exitcode = EXIT_FAILURE;
1588
1147
goto end;
1589
1148
}
1590
1149
}
1591
1150
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1592
1151
if(ret == -1){
1593
perror_plus("sigaction");
1594
return EX_OSERR;
1152
perror("sigaction");
1153
return EXIT_FAILURE;
1595
1154
}
1596
1155
if(old_sigterm_action.sa_handler != SIG_IGN){
1597
1156
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1598
1157
if(ret == -1){
1599
perror_plus("sigaction");
1600
exitcode = EX_OSERR;
1158
perror("sigaction");
1159
exitcode = EXIT_FAILURE;
1601
1160
goto end;
1602
1161
}
1603
1162
}
1604
1163
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1605
1164
if(ret == -1){
1606
perror_plus("sigaction");
1607
return EX_OSERR;
1165
perror("sigaction");
1166
return EXIT_FAILURE;
1608
1167
}
1609
1168
if(old_sigterm_action.sa_handler != SIG_IGN){
1610
1169
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1611
1170
if(ret == -1){
1612
perror_plus("sigaction");
1613
exitcode = EX_OSERR;
1171
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
1614
1173
goto end;
1615
1174
}
1616
1175
}
1617
1176
1618
1177
/* If the interface is down, bring it up */
1619
if(strcmp(interface, "none") != 0){
1178
if(interface[0] != '\0'){
1620
1179
if_index = (AvahiIfIndex) if_nametoindex(interface);
1621
1180
if(if_index == 0){
1622
1181
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1623
exitcode = EX_UNAVAILABLE;
1182
exitcode = EXIT_FAILURE;
1624
1183
goto end;
1625
1184
}
1626
1185
1628
1187
goto end;
1629
1188
}
1630
1189
1631
/* Re-raise priviliges */
1632
errno = 0;
1633
ret = seteuid(0);
1634
if(ret == -1){
1635
perror_plus("seteuid");
1636
}
1637
1638
1190
#ifdef __linux__
1639
1191
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1640
messages about the network interface to mess up the prompt */
1192
messages to mess up the prompt */
1641
1193
ret = klogctl(8, NULL, 5);
1642
1194
bool restore_loglevel = true;
1643
1195
if(ret == -1){
1644
1196
restore_loglevel = false;
1645
perror_plus("klogctl");
1197
perror("klogctl");
1646
1198
}
1647
1199
#endif /* __linux__ */
1648
1200
1649
1201
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1650
1202
if(sd < 0){
1651
perror_plus("socket");
1652
exitcode = EX_OSERR;
1203
perror("socket");
1204
exitcode = EXIT_FAILURE;
1653
1205
#ifdef __linux__
1654
1206
if(restore_loglevel){
1655
1207
ret = klogctl(7, NULL, 0);
1656
1208
if(ret == -1){
1657
perror_plus("klogctl");
1209
perror("klogctl");
1658
1210
}
1659
1211
}
1660
1212
#endif /* __linux__ */
1661
/* Lower privileges */
1662
errno = 0;
1663
ret = seteuid(uid);
1664
if(ret == -1){
1665
perror_plus("seteuid");
1666
}
1667
1213
goto end;
1668
1214
}
1669
1215
strcpy(network.ifr_name, interface);
1670
1216
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1671
1217
if(ret == -1){
1672
perror_plus("ioctl SIOCGIFFLAGS");
1218
perror("ioctl SIOCGIFFLAGS");
1673
1219
#ifdef __linux__
1674
1220
if(restore_loglevel){
1675
1221
ret = klogctl(7, NULL, 0);
1676
1222
if(ret == -1){
1677
perror_plus("klogctl");
1223
perror("klogctl");
1678
1224
}
1679
1225
}
1680
1226
#endif /* __linux__ */
1681
exitcode = EX_OSERR;
1682
/* Lower privileges */
1683
errno = 0;
1684
ret = seteuid(uid);
1685
if(ret == -1){
1686
perror_plus("seteuid");
1687
}
1227
exitcode = EXIT_FAILURE;
1688
1228
goto end;
1689
1229
}
1690
1230
if((network.ifr_flags & IFF_UP) == 0){
1693
1233
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1694
1234
if(ret == -1){
1695
1235
take_down_interface = false;
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1697
exitcode = EX_OSERR;
1236
perror("ioctl SIOCSIFFLAGS");
1237
exitcode = EXIT_FAILURE;
1698
1238
#ifdef __linux__
1699
1239
if(restore_loglevel){
1700
1240
ret = klogctl(7, NULL, 0);
1701
1241
if(ret == -1){
1702
perror_plus("klogctl");
1242
perror("klogctl");
1703
1243
}
1704
1244
}
1705
1245
#endif /* __linux__ */
1706
/* Lower privileges */
1707
errno = 0;
1708
ret = seteuid(uid);
1709
if(ret == -1){
1710
perror_plus("seteuid");
1711
}
1712
1246
goto end;
1713
1247
}
1714
1248
}
1715
/* Sleep checking until interface is running.
1716
Check every 0.25s, up to total time of delay */
1249
/* sleep checking until interface is running */
1717
1250
for(int i=0; i < delay * 4; i++){
1718
1251
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1719
1252
if(ret == -1){
1720
perror_plus("ioctl SIOCGIFFLAGS");
1253
perror("ioctl SIOCGIFFLAGS");
1721
1254
} else if(network.ifr_flags & IFF_RUNNING){
1722
1255
break;
1723
1256
}
1724
1257
struct timespec sleeptime = { .tv_nsec = 250000000 };
1725
1258
ret = nanosleep(&sleeptime, NULL);
1726
1259
if(ret == -1 and errno != EINTR){
1727
perror_plus("nanosleep");
1260
perror("nanosleep");
1728
1261
}
1729
1262
}
1730
1263
if(not take_down_interface){
1731
1264
/* We won't need the socket anymore */
1732
1265
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1733
1266
if(ret == -1){
1734
perror_plus("close");
1267
perror("close");
1735
1268
}
1736
1269
}
1737
1270
#ifdef __linux__
1739
1272
/* Restores kernel loglevel to default */
1740
1273
ret = klogctl(7, NULL, 0);
1741
1274
if(ret == -1){
1742
perror_plus("klogctl");
1275
perror("klogctl");
1743
1276
}
1744
1277
}
1745
1278
#endif /* __linux__ */
1746
/* Lower privileges */
1747
errno = 0;
1748
if(take_down_interface){
1749
/* Lower privileges */
1750
ret = seteuid(uid);
1751
if(ret == -1){
1752
perror_plus("seteuid");
1753
}
1754
} else {
1755
/* Lower privileges permanently */
1756
ret = setuid(uid);
1757
if(ret == -1){
1758
perror_plus("setuid");
1759
}
1760
}
1279
}
1280
1281
if(quit_now){
1282
goto end;
1283
}
1284
1285
uid = getuid();
1286
gid = getgid();
1287
1288
errno = 0;
1289
setgid(gid);
1290
if(ret == -1){
1291
perror("setgid");
1292
}
1293
1294
ret = setuid(uid);
1295
if(ret == -1){
1296
perror("setuid");
1761
1297
}
1762
1298
1763
1299
if(quit_now){
1767
1303
ret = init_gnutls_global(pubkey, seckey);
1768
1304
if(ret == -1){
1769
1305
fprintf(stderr, "init_gnutls_global failed\n");
1770
exitcode = EX_UNAVAILABLE;
1306
exitcode = EXIT_FAILURE;
1771
1307
goto end;
1772
1308
} else {
1773
1309
gnutls_initialized = true;
1777
1313
goto end;
1778
1314
}
1779
1315
1316
tempdir_created = true;
1780
1317
if(mkdtemp(tempdir) == NULL){
1781
perror_plus("mkdtemp");
1318
tempdir_created = false;
1319
perror("mkdtemp");
1782
1320
goto end;
1783
1321
}
1784
tempdir_created = true;
1785
1322
1786
1323
if(quit_now){
1787
1324
goto end;
1789
1326
1790
1327
if(not init_gpgme(pubkey, seckey, tempdir)){
1791
1328
fprintf(stderr, "init_gpgme failed\n");
1792
exitcode = EX_UNAVAILABLE;
1329
exitcode = EXIT_FAILURE;
1793
1330
goto end;
1794
1331
} else {
1795
1332
gpgme_initialized = true;
1805
1342
char *address = strrchr(connect_to, ':');
1806
1343
if(address == NULL){
1807
1344
fprintf(stderr, "No colon in address\n");
1808
exitcode = EX_USAGE;
1345
exitcode = EXIT_FAILURE;
1809
1346
goto end;
1810
1347
}
1811
1348
1819
1356
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1820
1357
or tmpmax != (uint16_t)tmpmax){
1821
1358
fprintf(stderr, "Bad port number\n");
1822
exitcode = EX_USAGE;
1359
exitcode = EXIT_FAILURE;
1823
1360
goto end;
1824
1361
}
1825
1362
1841
1378
if(quit_now){
1842
1379
goto end;
1843
1380
}
1844
1845
while(not quit_now){
1846
ret = start_mandos_communication(address, port, if_index, af);
1847
if(quit_now or ret == 0){
1848
break;
1849
}
1850
sleep((int)retry_interval or 1);
1851
};
1852
1853
if (not quit_now){
1381
1382
ret = start_mandos_communication(address, port, if_index, af);
1383
if(ret < 0){
1384
exitcode = EXIT_FAILURE;
1385
} else {
1854
1386
exitcode = EXIT_SUCCESS;
1855
1387
}
1856
1857
1388
goto end;
1858
1389
}
1859
1390
1883
1414
if(mc.server == NULL){
1884
1415
fprintf(stderr, "Failed to create Avahi server: %s\n",
1885
1416
avahi_strerror(error));
1886
exitcode = EX_UNAVAILABLE;
1417
exitcode = EXIT_FAILURE;
1887
1418
goto end;
1888
1419
}
1889
1420
1898
1429
if(sb == NULL){
1899
1430
fprintf(stderr, "Failed to create service browser: %s\n",
1900
1431
avahi_strerror(avahi_server_errno(mc.server)));
1901
exitcode = EX_UNAVAILABLE;
1432
exitcode = EXIT_FAILURE;
1902
1433
goto end;
1903
1434
}
1904
1435
1911
1442
if(debug){
1912
1443
fprintf(stderr, "Starting Avahi loop search\n");
1913
1444
}
1914
1915
ret = avahi_loop_with_timeout(mc.simple_poll,
1916
(int)(retry_interval * 1000));
1917
if(debug){
1918
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1919
(ret == 0) ? "successfully" : "with error");
1920
}
1445
1446
avahi_simple_poll_loop(mc.simple_poll);
1921
1447
1922
1448
end:
1923
1449
1944
1470
if(gpgme_initialized){
1945
1471
gpgme_release(mc.ctx);
1946
1472
}
1947
1948
/* Cleans up the circular linked list of Mandos servers the client
1949
has seen */
1950
if(mc.current_server != NULL){
1951
mc.current_server->prev->next = NULL;
1952
while(mc.current_server != NULL){
1953
server *next = mc.current_server->next;
1954
free(mc.current_server);
1955
mc.current_server = next;
1956
}
1957
}
1958
1473
1959
1474
/* Take down the network interface */
1960
1475
if(take_down_interface){
1961
/* Re-raise priviliges */
1962
errno = 0;
1963
ret = seteuid(0);
1476
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1964
1477
if(ret == -1){
1965
perror_plus("seteuid");
1478
perror("ioctl SIOCGIFFLAGS");
1479
} else if(network.ifr_flags & IFF_UP) {
1480
network.ifr_flags &= ~IFF_UP; /* clear flag */
1481
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1482
if(ret == -1){
1483
perror("ioctl SIOCSIFFLAGS");
1484
}
1966
1485
}
1967
if(geteuid() == 0){
1968
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1969
if(ret == -1){
1970
perror_plus("ioctl SIOCGIFFLAGS");
1971
} else if(network.ifr_flags & IFF_UP) {
1972
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1973
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1974
if(ret == -1){
1975
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1976
}
1977
}
1978
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1979
if(ret == -1){
1980
perror_plus("close");
1981
}
1982
/* Lower privileges permanently */
1983
errno = 0;
1984
ret = setuid(uid);
1985
if(ret == -1){
1986
perror_plus("setuid");
1987
}
1486
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1487
if(ret == -1){
1488
perror("close");
1988
1489
}
1989
1490
}
1990
1491
1991
/* Removes the GPGME temp directory and all files inside */
1492
/* Removes the temp directory used by GPGME */
1992
1493
if(tempdir_created){
1993
struct dirent **direntries = NULL;
1994
struct dirent *direntry = NULL;
1995
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1996
if (ret > 0){
1997
for(int i = 0; i < ret; i++){
1998
direntry = direntries[i];
1494
DIR *d;
1495
struct dirent *direntry;
1496
d = opendir(tempdir);
1497
if(d == NULL){
1498
if(errno != ENOENT){
1499
perror("opendir");
1500
}
1501
} else {
1502
while(true){
1503
direntry = readdir(d);
1504
if(direntry == NULL){
1505
break;
1506
}
1507
/* Skip "." and ".." */
1508
if(direntry->d_name[0] == '.'
1509
and (direntry->d_name[1] == '\0'
1510
or (direntry->d_name[1] == '.'
1511
and direntry->d_name[2] == '\0'))){
1512
continue;
1513
}
1999
1514
char *fullname = NULL;
2000
1515
ret = asprintf(&fullname, "%s/%s", tempdir,
2001
1516
direntry->d_name);
2002
1517
if(ret < 0){
2003
perror_plus("asprintf");
1518
perror("asprintf");
2004
1519
continue;
2005
1520
}
2006
1521
ret = remove(fullname);
2010
1525
}
2011
1526
free(fullname);
2012
1527
}
2013
}
2014
2015
/* need to be cleaned even if ret == 0 because man page doesn't
2016
specify */
2017
free(direntries);
2018
if (ret == -1){
2019
perror_plus("scandir");
1528
closedir(d);
2020
1529
}
2021
1530
ret = rmdir(tempdir);
2022
1531
if(ret == -1 and errno != ENOENT){
2023
perror_plus("rmdir");
1532
perror("rmdir");
2024
1533
}
2025
1534
}
2026
1535
2027
1536
if(quit_now){
2028
1537
sigemptyset(&old_sigterm_action.sa_mask);
2029
1538
old_sigterm_action.sa_handler = SIG_DFL;
2030
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2031
&old_sigterm_action,
2032
NULL));
1539
ret = sigaction(signal_received, &old_sigterm_action, NULL);
2033
1540
if(ret == -1){
2034
perror_plus("sigaction");
2035
}
2036
do {
2037
ret = raise(signal_received);
2038
} while(ret != 0 and errno == EINTR);
2039
if(ret != 0){
2040
perror_plus("raise");
2041
abort();
2042
}
2043
TEMP_FAILURE_RETRY(pause());
1541
perror("sigaction");
1542
}
1543
raise(signal_received);
2044
1544
}
2045
1545
2046
1546
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0