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- Committer: Teddy Hogeborn
- Date: 2011-07-15 01:07:51 UTC
- Revision ID: teddy@fukt.bsnet.se-20110715010751-bh9rhcm6hv8f174e
* initramfs-tools-script: Bug fix: Add missing "--options" argument to
getopt.
getopt.
- files added:
- 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 © 2008,2009 Teddy Hogeborn
13
* Copyright © 2008,2009 Björn Påhlsson
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 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, EXIT_FAILURE,
47
srand(), strtof() */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
strtof(), abort() */
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
#include <time.h> /* nanosleep(), time() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
69
70
if_nametoindex(), IF_NAMESIZE */
71
72
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), setuid(),
75
setgid() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
82
83
#include <signal.h> /* sigemptyset(), sigaddset(),
83
84
sigaction(), SIGTERM, sig_atomic_t,
84
85
raise() */
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
85
88
86
89
#ifdef __linux__
87
90
#include <sys/klog.h> /* klogctl() */
125
128
static const char mandos_protocol_version[] = "1";
126
129
const char *argp_program_version = "mandos-client " VERSION;
127
130
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;
128
144
129
145
/* Used for passing in values through the Avahi callback functions */
130
146
typedef struct {
135
151
gnutls_dh_params_t dh_params;
136
152
const char *priority;
137
153
gpgme_ctx_t ctx;
154
server *current_server;
138
155
} mandos_context;
139
156
140
157
/* global context so signal handler can reach it*/
141
158
mandos_context mc = { .simple_poll = NULL, .server = NULL,
142
159
.dh_bits = 1024, .priority = "SECURE256"
143
":!CTYPE-X.509:+CTYPE-OPENPGP" };
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
}
144
172
145
173
/*
146
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
159
187
return buffer_capacity;
160
188
}
161
189
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
162
227
/*
163
228
* Initialize GPGME.
164
229
*/
165
230
static bool init_gpgme(const char *seckey,
166
231
const char *pubkey, const char *tempdir){
167
int ret;
168
232
gpgme_error_t rc;
169
233
gpgme_engine_info_t engine_info;
170
234
173
237
* Helper function to insert pub and seckey to the engine keyring.
174
238
*/
175
239
bool import_key(const char *filename){
240
int ret;
176
241
int fd;
177
242
gpgme_data_t pgp_data;
178
243
179
244
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
180
245
if(fd == -1){
181
perror("open");
246
perror_plus("open");
182
247
return false;
183
248
}
184
249
198
263
199
264
ret = (int)TEMP_FAILURE_RETRY(close(fd));
200
265
if(ret == -1){
201
perror("close");
266
perror_plus("close");
202
267
}
203
268
gpgme_data_release(pgp_data);
204
269
return true;
329
394
330
395
/* Seek back to the beginning of the GPGME plaintext data buffer */
331
396
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
332
perror("gpgme_data_seek");
397
perror_plus("gpgme_data_seek");
333
398
plaintext_length = -1;
334
399
goto decrypt_end;
335
400
}
340
405
(size_t)plaintext_length,
341
406
plaintext_capacity);
342
407
if(plaintext_capacity == 0){
343
perror("incbuffer");
408
perror_plus("incbuffer");
344
409
plaintext_length = -1;
345
410
goto decrypt_end;
346
411
}
353
418
break;
354
419
}
355
420
if(ret < 0){
356
perror("gpgme_data_read");
421
perror_plus("gpgme_data_read");
357
422
plaintext_length = -1;
358
423
goto decrypt_end;
359
424
}
416
481
}
417
482
418
483
/* OpenPGP credentials */
419
gnutls_certificate_allocate_credentials(&mc.cred);
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
420
485
if(ret != GNUTLS_E_SUCCESS){
421
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
422
from
423
-Wunreachable-code
424
*/
486
fprintf(stderr, "GnuTLS memory error: %s\n",
425
487
safer_gnutls_strerror(ret));
426
488
gnutls_global_deinit();
427
489
return -1;
474
536
static int init_gnutls_session(gnutls_session_t *session){
475
537
int ret;
476
538
/* GnuTLS session creation */
477
ret = gnutls_init(session, GNUTLS_SERVER);
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);
478
545
if(ret != GNUTLS_E_SUCCESS){
479
546
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
480
547
safer_gnutls_strerror(ret));
482
549
483
550
{
484
551
const char *err;
485
ret = gnutls_priority_set_direct(*session, mc.priority, &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);
486
559
if(ret != GNUTLS_E_SUCCESS){
487
560
fprintf(stderr, "Syntax error at: %s\n", err);
488
561
fprintf(stderr, "GnuTLS error: %s\n",
492
565
}
493
566
}
494
567
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
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);
497
576
if(ret != GNUTLS_E_SUCCESS){
498
577
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
578
safer_gnutls_strerror(ret));
502
581
}
503
582
504
583
/* ignore client certificate if any. */
505
gnutls_certificate_server_set_request(*session,
506
GNUTLS_CERT_IGNORE);
584
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
507
585
508
586
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
509
587
514
592
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
515
593
__attribute__((unused)) const char *txt){}
516
594
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
520
595
/* Called when a Mandos server is found */
521
596
static int start_mandos_communication(const char *ip, uint16_t port,
522
597
AvahiIfIndex if_index,
528
603
struct sockaddr_in6 in6;
529
604
} to;
530
605
char *buffer = NULL;
531
char *decrypted_buffer;
606
char *decrypted_buffer = NULL;
532
607
size_t buffer_length = 0;
533
608
size_t buffer_capacity = 0;
534
ssize_t decrypted_buffer_size;
535
609
size_t written;
536
int retval = 0;
610
int retval = -1;
537
611
gnutls_session_t session;
538
612
int pf; /* Protocol family */
539
613
614
errno = 0;
615
540
616
if(quit_now){
617
errno = EINTR;
541
618
return -1;
542
619
}
543
620
550
627
break;
551
628
default:
552
629
fprintf(stderr, "Bad address family: %d\n", af);
630
errno = EINVAL;
553
631
return -1;
554
632
}
555
633
565
643
566
644
tcp_sd = socket(pf, SOCK_STREAM, 0);
567
645
if(tcp_sd < 0){
568
perror("socket");
569
retval = -1;
646
int e = errno;
647
perror_plus("socket");
648
errno = e;
570
649
goto mandos_end;
571
650
}
572
651
573
652
if(quit_now){
653
errno = EINTR;
574
654
goto mandos_end;
575
655
}
576
656
583
663
ret = inet_pton(af, ip, &to.in.sin_addr);
584
664
}
585
665
if(ret < 0 ){
586
perror("inet_pton");
587
retval = -1;
666
int e = errno;
667
perror_plus("inet_pton");
668
errno = e;
588
669
goto mandos_end;
589
670
}
590
671
if(ret == 0){
672
int e = errno;
591
673
fprintf(stderr, "Bad address: %s\n", ip);
592
retval = -1;
674
errno = e;
593
675
goto mandos_end;
594
676
}
595
677
if(af == AF_INET6){
603
685
if(if_index == AVAHI_IF_UNSPEC){
604
686
fprintf(stderr, "An IPv6 link-local address is incomplete"
605
687
" without a network interface\n");
606
retval = -1;
688
errno = EINVAL;
607
689
goto mandos_end;
608
690
}
609
691
/* Set the network interface number as scope */
616
698
}
617
699
618
700
if(quit_now){
701
errno = EINTR;
619
702
goto mandos_end;
620
703
}
621
704
623
706
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
624
707
char interface[IF_NAMESIZE];
625
708
if(if_indextoname((unsigned int)if_index, interface) == NULL){
626
perror("if_indextoname");
709
perror_plus("if_indextoname");
627
710
} else {
628
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
629
712
ip, interface, port);
643
726
sizeof(addrstr));
644
727
}
645
728
if(pcret == NULL){
646
perror("inet_ntop");
729
perror_plus("inet_ntop");
647
730
} else {
648
731
if(strcmp(addrstr, ip) != 0){
649
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
652
735
}
653
736
654
737
if(quit_now){
738
errno = EINTR;
655
739
goto mandos_end;
656
740
}
657
741
661
745
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
662
746
}
663
747
if(ret < 0){
664
perror("connect");
665
retval = -1;
748
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
749
int e = errno;
750
perror_plus("connect");
751
errno = e;
752
}
666
753
goto mandos_end;
667
754
}
668
755
669
756
if(quit_now){
757
errno = EINTR;
670
758
goto mandos_end;
671
759
}
672
760
677
765
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
678
766
out_size - written));
679
767
if(ret == -1){
680
perror("write");
681
retval = -1;
768
int e = errno;
769
perror_plus("write");
770
errno = e;
682
771
goto mandos_end;
683
772
}
684
773
written += (size_t)ret;
694
783
}
695
784
696
785
if(quit_now){
786
errno = EINTR;
697
787
goto mandos_end;
698
788
}
699
789
}
703
793
}
704
794
705
795
if(quit_now){
796
errno = EINTR;
706
797
goto mandos_end;
707
798
}
708
799
800
/* Spurious warning from -Wint-to-pointer-cast */
709
801
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
710
802
711
803
if(quit_now){
804
errno = EINTR;
712
805
goto mandos_end;
713
806
}
714
807
715
do{
808
do {
716
809
ret = gnutls_handshake(session);
717
810
if(quit_now){
811
errno = EINTR;
718
812
goto mandos_end;
719
813
}
720
814
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
724
818
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
725
819
gnutls_perror(ret);
726
820
}
727
retval = -1;
821
errno = EPROTO;
728
822
goto mandos_end;
729
823
}
730
824
738
832
while(true){
739
833
740
834
if(quit_now){
835
errno = EINTR;
741
836
goto mandos_end;
742
837
}
743
838
744
839
buffer_capacity = incbuffer(&buffer, buffer_length,
745
840
buffer_capacity);
746
841
if(buffer_capacity == 0){
747
perror("incbuffer");
748
retval = -1;
842
int e = errno;
843
perror_plus("incbuffer");
844
errno = e;
749
845
goto mandos_end;
750
846
}
751
847
752
848
if(quit_now){
849
errno = EINTR;
753
850
goto mandos_end;
754
851
}
755
852
764
861
case GNUTLS_E_AGAIN:
765
862
break;
766
863
case GNUTLS_E_REHANDSHAKE:
767
do{
864
do {
768
865
ret = gnutls_handshake(session);
769
866
770
867
if(quit_now){
868
errno = EINTR;
771
869
goto mandos_end;
772
870
}
773
871
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
774
872
if(ret < 0){
775
873
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
776
874
gnutls_perror(ret);
777
retval = -1;
875
errno = EPROTO;
778
876
goto mandos_end;
779
877
}
780
878
break;
781
879
default:
782
880
fprintf(stderr, "Unknown error while reading data from"
783
881
" encrypted session with Mandos server\n");
784
retval = -1;
785
882
gnutls_bye(session, GNUTLS_SHUT_RDWR);
883
errno = EIO;
786
884
goto mandos_end;
787
885
}
788
886
} else {
795
893
}
796
894
797
895
if(quit_now){
798
goto mandos_end;
799
}
800
801
gnutls_bye(session, GNUTLS_SHUT_RDWR);
802
803
if(quit_now){
804
goto mandos_end;
805
}
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);
806
907
807
908
if(buffer_length > 0){
909
ssize_t decrypted_buffer_size;
808
910
decrypted_buffer_size = pgp_packet_decrypt(buffer,
809
911
buffer_length,
810
912
&decrypted_buffer);
811
913
if(decrypted_buffer_size >= 0){
914
812
915
written = 0;
813
916
while(written < (size_t) decrypted_buffer_size){
814
917
if(quit_now){
918
errno = EINTR;
815
919
goto mandos_end;
816
920
}
817
921
819
923
(size_t)decrypted_buffer_size - written,
820
924
stdout);
821
925
if(ret == 0 and ferror(stdout)){
926
int e = errno;
822
927
if(debug){
823
928
fprintf(stderr, "Error writing encrypted data: %s\n",
824
929
strerror(errno));
825
930
}
826
retval = -1;
827
break;
931
errno = e;
932
goto mandos_end;
828
933
}
829
934
written += (size_t)ret;
830
935
}
831
free(decrypted_buffer);
832
} else {
833
retval = -1;
936
retval = 0;
834
937
}
835
} else {
836
retval = -1;
837
938
}
838
939
839
940
/* Shutdown procedure */
840
941
841
942
mandos_end:
842
free(buffer);
843
if(tcp_sd >= 0){
844
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
845
}
846
if(ret == -1){
847
perror("close");
848
}
849
gnutls_deinit(session);
850
if(quit_now){
851
retval = -1;
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
}
852
962
}
853
963
return retval;
854
964
}
897
1007
avahi_proto_to_af(proto));
898
1008
if(ret == 0){
899
1009
avahi_simple_poll_quit(mc.simple_poll);
1010
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
900
1013
}
901
1014
}
902
1015
}
956
1069
}
957
1070
}
958
1071
959
/* stop main loop after sigterm has been called */
1072
/* Signal handler that stops main loop after SIGTERM */
960
1073
static void handle_sigterm(int sig){
961
1074
if(quit_now){
962
1075
return;
964
1077
quit_now = 1;
965
1078
signal_received = sig;
966
1079
int old_errno = errno;
1080
/* set main loop to exit */
967
1081
if(mc.simple_poll != NULL){
968
1082
avahi_simple_poll_quit(mc.simple_poll);
969
1083
}
970
1084
errno = old_errno;
971
1085
}
972
1086
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
973
1274
int main(int argc, char *argv[]){
974
1275
AvahiSServiceBrowser *sb = NULL;
975
1276
int error;
977
1278
intmax_t tmpmax;
978
1279
char *tmp;
979
1280
int exitcode = EXIT_SUCCESS;
980
const char *interface = "eth0";
1281
const char *interface = "";
981
1282
struct ifreq network;
982
1283
int sd = -1;
983
1284
bool take_down_interface = false;
984
1285
uid_t uid;
985
1286
gid_t gid;
986
char *connect_to = NULL;
987
1287
char tempdir[] = "/tmp/mandosXXXXXX";
988
1288
bool tempdir_created = false;
989
1289
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
993
1293
bool gnutls_initialized = false;
994
1294
bool gpgme_initialized = false;
995
1295
float delay = 2.5f;
1296
double retry_interval = 10; /* 10s between trying a server and
1297
retrying the same server again */
996
1298
997
struct sigaction old_sigterm_action;
1299
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
998
1300
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
999
1301
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
1000
1323
{
1001
1324
struct argp_option options[] = {
1002
1325
{ .name = "debug", .key = 128,
1031
1354
.arg = "SECONDS",
1032
1355
.doc = "Maximum delay to wait for interface startup",
1033
1356
.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 },
1034
1370
{ .name = NULL }
1035
1371
};
1036
1372
1037
1373
error_t parse_opt(int key, char *arg,
1038
1374
struct argp_state *state){
1375
errno = 0;
1039
1376
switch(key){
1040
1377
case 128: /* --debug */
1041
1378
debug = true;
1057
1394
tmpmax = strtoimax(arg, &tmp, 10);
1058
1395
if(errno != 0 or tmp == arg or *tmp != '\0'
1059
1396
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1060
fprintf(stderr, "Bad number of DH bits\n");
1061
exit(EXIT_FAILURE);
1397
argp_error(state, "Bad number of DH bits");
1062
1398
}
1063
1399
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1064
1400
break;
1069
1405
errno = 0;
1070
1406
delay = strtof(arg, &tmp);
1071
1407
if(errno != 0 or tmp == arg or *tmp != '\0'){
1072
fprintf(stderr, "Bad delay\n");
1073
exit(EXIT_FAILURE);
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");
1074
1416
}
1075
1417
break;
1076
case ARGP_KEY_ARG:
1077
argp_usage(state);
1078
case ARGP_KEY_END:
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);
1079
1431
break;
1080
1432
default:
1081
1433
return ARGP_ERR_UNKNOWN;
1082
1434
}
1083
return 0;
1435
return errno;
1084
1436
}
1085
1437
1086
1438
struct argp argp = { .options = options, .parser = parse_opt,
1087
1439
.args_doc = "",
1088
1440
.doc = "Mandos client -- Get and decrypt"
1089
1441
" passwords from a Mandos server" };
1090
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1091
if(ret == ARGP_ERR_UNKNOWN){
1092
fprintf(stderr, "Unknown error while parsing arguments\n");
1093
exitcode = EXIT_FAILURE;
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;
1094
1455
goto end;
1095
1456
}
1096
1457
}
1098
1459
if(not debug){
1099
1460
avahi_set_log_function(empty_log);
1100
1461
}
1462
1463
if(interface[0] == '\0'){
1464
struct dirent **direntries;
1465
ret = scandir(sys_class_net, &direntries, good_interface,
1466
alphasort);
1467
if(ret >= 1){
1468
/* Pick the first good interface */
1469
interface = strdup(direntries[0]->d_name);
1470
if(debug){
1471
fprintf(stderr, "Using interface \"%s\"\n", interface);
1472
}
1473
if(interface == NULL){
1474
perror_plus("malloc");
1475
free(direntries);
1476
exitcode = EXIT_FAILURE;
1477
goto end;
1478
}
1479
free(direntries);
1480
} else {
1481
free(direntries);
1482
fprintf(stderr, "Could not find a network interface\n");
1483
exitcode = EXIT_FAILURE;
1484
goto end;
1485
}
1486
}
1101
1487
1102
1488
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1103
1489
from the signal handler */
1106
1492
mc.simple_poll = avahi_simple_poll_new();
1107
1493
if(mc.simple_poll == NULL){
1108
1494
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1109
exitcode = EXIT_FAILURE;
1495
exitcode = EX_UNAVAILABLE;
1110
1496
goto end;
1111
1497
}
1112
1498
1113
1499
sigemptyset(&sigterm_action.sa_mask);
1114
1500
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1115
1501
if(ret == -1){
1116
perror("sigaddset");
1117
exitcode = EXIT_FAILURE;
1502
perror_plus("sigaddset");
1503
exitcode = EX_OSERR;
1118
1504
goto end;
1119
1505
}
1120
1506
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1121
1507
if(ret == -1){
1122
perror("sigaddset");
1123
exitcode = EXIT_FAILURE;
1508
perror_plus("sigaddset");
1509
exitcode = EX_OSERR;
1124
1510
goto end;
1125
1511
}
1126
1512
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1127
1513
if(ret == -1){
1128
perror("sigaddset");
1129
exitcode = EXIT_FAILURE;
1514
perror_plus("sigaddset");
1515
exitcode = EX_OSERR;
1130
1516
goto end;
1131
1517
}
1132
1518
/* Need to check if the handler is SIG_IGN before handling:
1135
1521
*/
1136
1522
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1137
1523
if(ret == -1){
1138
perror("sigaction");
1139
return EXIT_FAILURE;
1524
perror_plus("sigaction");
1525
return EX_OSERR;
1140
1526
}
1141
1527
if(old_sigterm_action.sa_handler != SIG_IGN){
1142
1528
ret = sigaction(SIGINT, &sigterm_action, NULL);
1143
1529
if(ret == -1){
1144
perror("sigaction");
1145
exitcode = EXIT_FAILURE;
1530
perror_plus("sigaction");
1531
exitcode = EX_OSERR;
1146
1532
goto end;
1147
1533
}
1148
1534
}
1149
1535
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1150
1536
if(ret == -1){
1151
perror("sigaction");
1152
return EXIT_FAILURE;
1537
perror_plus("sigaction");
1538
return EX_OSERR;
1153
1539
}
1154
1540
if(old_sigterm_action.sa_handler != SIG_IGN){
1155
1541
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1156
1542
if(ret == -1){
1157
perror("sigaction");
1158
exitcode = EXIT_FAILURE;
1543
perror_plus("sigaction");
1544
exitcode = EX_OSERR;
1159
1545
goto end;
1160
1546
}
1161
1547
}
1162
1548
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1163
1549
if(ret == -1){
1164
perror("sigaction");
1165
return EXIT_FAILURE;
1550
perror_plus("sigaction");
1551
return EX_OSERR;
1166
1552
}
1167
1553
if(old_sigterm_action.sa_handler != SIG_IGN){
1168
1554
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1169
1555
if(ret == -1){
1170
perror("sigaction");
1171
exitcode = EXIT_FAILURE;
1556
perror_plus("sigaction");
1557
exitcode = EX_OSERR;
1172
1558
goto end;
1173
1559
}
1174
1560
}
1175
1561
1176
1562
/* If the interface is down, bring it up */
1177
if(interface[0] != '\0'){
1563
if(strcmp(interface, "none") != 0){
1178
1564
if_index = (AvahiIfIndex) if_nametoindex(interface);
1179
1565
if(if_index == 0){
1180
1566
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1181
exitcode = EXIT_FAILURE;
1567
exitcode = EX_UNAVAILABLE;
1182
1568
goto end;
1183
1569
}
1184
1570
1186
1572
goto end;
1187
1573
}
1188
1574
1575
/* Re-raise priviliges */
1576
errno = 0;
1577
ret = seteuid(0);
1578
if(ret == -1){
1579
perror_plus("seteuid");
1580
}
1581
1189
1582
#ifdef __linux__
1190
1583
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1191
messages to mess up the prompt */
1584
messages about the network interface to mess up the prompt */
1192
1585
ret = klogctl(8, NULL, 5);
1193
1586
bool restore_loglevel = true;
1194
1587
if(ret == -1){
1195
1588
restore_loglevel = false;
1196
perror("klogctl");
1589
perror_plus("klogctl");
1197
1590
}
1198
1591
#endif /* __linux__ */
1199
1592
1200
1593
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1201
1594
if(sd < 0){
1202
perror("socket");
1203
exitcode = EXIT_FAILURE;
1595
perror_plus("socket");
1596
exitcode = EX_OSERR;
1204
1597
#ifdef __linux__
1205
1598
if(restore_loglevel){
1206
1599
ret = klogctl(7, NULL, 0);
1207
1600
if(ret == -1){
1208
perror("klogctl");
1601
perror_plus("klogctl");
1209
1602
}
1210
1603
}
1211
1604
#endif /* __linux__ */
1605
/* Lower privileges */
1606
errno = 0;
1607
ret = seteuid(uid);
1608
if(ret == -1){
1609
perror_plus("seteuid");
1610
}
1212
1611
goto end;
1213
1612
}
1214
1613
strcpy(network.ifr_name, interface);
1215
1614
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1216
1615
if(ret == -1){
1217
perror("ioctl SIOCGIFFLAGS");
1616
perror_plus("ioctl SIOCGIFFLAGS");
1218
1617
#ifdef __linux__
1219
1618
if(restore_loglevel){
1220
1619
ret = klogctl(7, NULL, 0);
1221
1620
if(ret == -1){
1222
perror("klogctl");
1621
perror_plus("klogctl");
1223
1622
}
1224
1623
}
1225
1624
#endif /* __linux__ */
1226
exitcode = EXIT_FAILURE;
1625
exitcode = EX_OSERR;
1626
/* Lower privileges */
1627
errno = 0;
1628
ret = seteuid(uid);
1629
if(ret == -1){
1630
perror_plus("seteuid");
1631
}
1227
1632
goto end;
1228
1633
}
1229
1634
if((network.ifr_flags & IFF_UP) == 0){
1232
1637
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1233
1638
if(ret == -1){
1234
1639
take_down_interface = false;
1235
perror("ioctl SIOCSIFFLAGS");
1236
exitcode = EXIT_FAILURE;
1640
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1641
exitcode = EX_OSERR;
1237
1642
#ifdef __linux__
1238
1643
if(restore_loglevel){
1239
1644
ret = klogctl(7, NULL, 0);
1240
1645
if(ret == -1){
1241
perror("klogctl");
1646
perror_plus("klogctl");
1242
1647
}
1243
1648
}
1244
1649
#endif /* __linux__ */
1650
/* Lower privileges */
1651
errno = 0;
1652
ret = seteuid(uid);
1653
if(ret == -1){
1654
perror_plus("seteuid");
1655
}
1245
1656
goto end;
1246
1657
}
1247
1658
}
1248
/* sleep checking until interface is running */
1659
/* Sleep checking until interface is running.
1660
Check every 0.25s, up to total time of delay */
1249
1661
for(int i=0; i < delay * 4; i++){
1250
1662
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1251
1663
if(ret == -1){
1252
perror("ioctl SIOCGIFFLAGS");
1664
perror_plus("ioctl SIOCGIFFLAGS");
1253
1665
} else if(network.ifr_flags & IFF_RUNNING){
1254
1666
break;
1255
1667
}
1256
1668
struct timespec sleeptime = { .tv_nsec = 250000000 };
1257
1669
ret = nanosleep(&sleeptime, NULL);
1258
1670
if(ret == -1 and errno != EINTR){
1259
perror("nanosleep");
1671
perror_plus("nanosleep");
1260
1672
}
1261
1673
}
1262
1674
if(not take_down_interface){
1263
1675
/* We won't need the socket anymore */
1264
1676
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1265
1677
if(ret == -1){
1266
perror("close");
1678
perror_plus("close");
1267
1679
}
1268
1680
}
1269
1681
#ifdef __linux__
1271
1683
/* Restores kernel loglevel to default */
1272
1684
ret = klogctl(7, NULL, 0);
1273
1685
if(ret == -1){
1274
perror("klogctl");
1686
perror_plus("klogctl");
1275
1687
}
1276
1688
}
1277
1689
#endif /* __linux__ */
1278
}
1279
1280
if(quit_now){
1281
goto end;
1282
}
1283
1284
uid = getuid();
1285
gid = getgid();
1286
1287
errno = 0;
1288
setgid(gid);
1289
if(ret == -1){
1290
perror("setgid");
1291
}
1292
1293
ret = setuid(uid);
1294
if(ret == -1){
1295
perror("setuid");
1690
/* Lower privileges */
1691
errno = 0;
1692
if(take_down_interface){
1693
/* Lower privileges */
1694
ret = seteuid(uid);
1695
if(ret == -1){
1696
perror_plus("seteuid");
1697
}
1698
} else {
1699
/* Lower privileges permanently */
1700
ret = setuid(uid);
1701
if(ret == -1){
1702
perror_plus("setuid");
1703
}
1704
}
1296
1705
}
1297
1706
1298
1707
if(quit_now){
1302
1711
ret = init_gnutls_global(pubkey, seckey);
1303
1712
if(ret == -1){
1304
1713
fprintf(stderr, "init_gnutls_global failed\n");
1305
exitcode = EXIT_FAILURE;
1714
exitcode = EX_UNAVAILABLE;
1306
1715
goto end;
1307
1716
} else {
1308
1717
gnutls_initialized = true;
1312
1721
goto end;
1313
1722
}
1314
1723
1724
if(mkdtemp(tempdir) == NULL){
1725
perror_plus("mkdtemp");
1726
goto end;
1727
}
1315
1728
tempdir_created = true;
1316
if(mkdtemp(tempdir) == NULL){
1317
tempdir_created = false;
1318
perror("mkdtemp");
1319
goto end;
1320
}
1321
1729
1322
1730
if(quit_now){
1323
1731
goto end;
1325
1733
1326
1734
if(not init_gpgme(pubkey, seckey, tempdir)){
1327
1735
fprintf(stderr, "init_gpgme failed\n");
1328
exitcode = EXIT_FAILURE;
1736
exitcode = EX_UNAVAILABLE;
1329
1737
goto end;
1330
1738
} else {
1331
1739
gpgme_initialized = true;
1341
1749
char *address = strrchr(connect_to, ':');
1342
1750
if(address == NULL){
1343
1751
fprintf(stderr, "No colon in address\n");
1344
exitcode = EXIT_FAILURE;
1752
exitcode = EX_USAGE;
1345
1753
goto end;
1346
1754
}
1347
1755
1355
1763
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1356
1764
or tmpmax != (uint16_t)tmpmax){
1357
1765
fprintf(stderr, "Bad port number\n");
1358
exitcode = EXIT_FAILURE;
1766
exitcode = EX_USAGE;
1359
1767
goto end;
1360
1768
}
1361
1769
1377
1785
if(quit_now){
1378
1786
goto end;
1379
1787
}
1380
1381
ret = start_mandos_communication(address, port, if_index, af);
1382
if(ret < 0){
1383
exitcode = EXIT_FAILURE;
1384
} else {
1788
1789
while(not quit_now){
1790
ret = start_mandos_communication(address, port, if_index, af);
1791
if(quit_now or ret == 0){
1792
break;
1793
}
1794
sleep((int)retry_interval or 1);
1795
};
1796
1797
if (not quit_now){
1385
1798
exitcode = EXIT_SUCCESS;
1386
1799
}
1800
1387
1801
goto end;
1388
1802
}
1389
1803
1413
1827
if(mc.server == NULL){
1414
1828
fprintf(stderr, "Failed to create Avahi server: %s\n",
1415
1829
avahi_strerror(error));
1416
exitcode = EXIT_FAILURE;
1830
exitcode = EX_UNAVAILABLE;
1417
1831
goto end;
1418
1832
}
1419
1833
1428
1842
if(sb == NULL){
1429
1843
fprintf(stderr, "Failed to create service browser: %s\n",
1430
1844
avahi_strerror(avahi_server_errno(mc.server)));
1431
exitcode = EXIT_FAILURE;
1845
exitcode = EX_UNAVAILABLE;
1432
1846
goto end;
1433
1847
}
1434
1848
1441
1855
if(debug){
1442
1856
fprintf(stderr, "Starting Avahi loop search\n");
1443
1857
}
1444
1445
avahi_simple_poll_loop(mc.simple_poll);
1858
1859
ret = avahi_loop_with_timeout(mc.simple_poll,
1860
(int)(retry_interval * 1000));
1861
if(debug){
1862
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1863
(ret == 0) ? "successfully" : "with error");
1864
}
1446
1865
1447
1866
end:
1448
1867
1469
1888
if(gpgme_initialized){
1470
1889
gpgme_release(mc.ctx);
1471
1890
}
1891
1892
/* Cleans up the circular linked list of Mandos servers the client
1893
has seen */
1894
if(mc.current_server != NULL){
1895
mc.current_server->prev->next = NULL;
1896
while(mc.current_server != NULL){
1897
server *next = mc.current_server->next;
1898
free(mc.current_server);
1899
mc.current_server = next;
1900
}
1901
}
1472
1902
1473
1903
/* Take down the network interface */
1474
1904
if(take_down_interface){
1475
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1905
/* Re-raise priviliges */
1906
errno = 0;
1907
ret = seteuid(0);
1476
1908
if(ret == -1){
1477
perror("ioctl SIOCGIFFLAGS");
1478
} else if(network.ifr_flags & IFF_UP) {
1479
network.ifr_flags &= ~IFF_UP; /* clear flag */
1480
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1481
if(ret == -1){
1482
perror("ioctl SIOCSIFFLAGS");
1483
}
1909
perror_plus("seteuid");
1484
1910
}
1485
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1486
if(ret == -1){
1487
perror("close");
1911
if(geteuid() == 0){
1912
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1913
if(ret == -1){
1914
perror_plus("ioctl SIOCGIFFLAGS");
1915
} else if(network.ifr_flags & IFF_UP) {
1916
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1917
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1918
if(ret == -1){
1919
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1920
}
1921
}
1922
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1923
if(ret == -1){
1924
perror_plus("close");
1925
}
1926
/* Lower privileges permanently */
1927
errno = 0;
1928
ret = setuid(uid);
1929
if(ret == -1){
1930
perror_plus("setuid");
1931
}
1488
1932
}
1489
1933
}
1490
1934
1491
/* Removes the temp directory used by GPGME */
1935
/* Removes the GPGME temp directory and all files inside */
1492
1936
if(tempdir_created){
1493
DIR *d;
1494
struct dirent *direntry;
1495
d = opendir(tempdir);
1496
if(d == NULL){
1497
if(errno != ENOENT){
1498
perror("opendir");
1499
}
1500
} else {
1501
while(true){
1502
direntry = readdir(d);
1503
if(direntry == NULL){
1504
break;
1505
}
1506
/* Skip "." and ".." */
1507
if(direntry->d_name[0] == '.'
1508
and (direntry->d_name[1] == '\0'
1509
or (direntry->d_name[1] == '.'
1510
and direntry->d_name[2] == '\0'))){
1511
continue;
1512
}
1937
struct dirent **direntries = NULL;
1938
struct dirent *direntry = NULL;
1939
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1940
if (ret > 0){
1941
for(int i = 0; i < ret; i++){
1942
direntry = direntries[i];
1513
1943
char *fullname = NULL;
1514
1944
ret = asprintf(&fullname, "%s/%s", tempdir,
1515
1945
direntry->d_name);
1516
1946
if(ret < 0){
1517
perror("asprintf");
1947
perror_plus("asprintf");
1518
1948
continue;
1519
1949
}
1520
1950
ret = remove(fullname);
1524
1954
}
1525
1955
free(fullname);
1526
1956
}
1527
closedir(d);
1957
}
1958
1959
/* need to be cleaned even if ret == 0 because man page doesn't
1960
specify */
1961
free(direntries);
1962
if (ret == -1){
1963
perror_plus("scandir");
1528
1964
}
1529
1965
ret = rmdir(tempdir);
1530
1966
if(ret == -1 and errno != ENOENT){
1531
perror("rmdir");
1967
perror_plus("rmdir");
1532
1968
}
1533
1969
}
1534
1970
1535
1971
if(quit_now){
1536
1972
sigemptyset(&old_sigterm_action.sa_mask);
1537
1973
old_sigterm_action.sa_handler = SIG_DFL;
1538
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1974
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1975
&old_sigterm_action,
1976
NULL));
1539
1977
if(ret == -1){
1540
perror("sigaction");
1541
}
1542
raise(signal_received);
1978
perror_plus("sigaction");
1979
}
1980
do {
1981
ret = raise(signal_received);
1982
} while(ret != 0 and errno == EINTR);
1983
if(ret != 0){
1984
perror_plus("raise");
1985
abort();
1986
}
1987
TEMP_FAILURE_RETRY(pause());
1543
1988
}
1544
1989
1545
1990
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0