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- Committer: Teddy Hogeborn
- Date: 2010-09-25 20:09:10 UTC
- Revision ID: teddy@fukt.bsnet.se-20100925200910-8bxnasqkol93sj89
* mandos: Do not write pid file if --debug is passed.
* mandos.xml (FILES): Pid file only records pid of latest server.
* mandos.xml (FILES): Pid file only records pid of latest server.
added
removed
plugins.d/mandos-client.c
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() */
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
65
#include <errno.h> /* perror(), errno */
66
#include <time.h> /* nanosleep(), time() */
66
#include <time.h> /* nanosleep(), time(), sleep() */
67
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
68
SIOCSIFFLAGS, if_indextoname(),
69
69
if_nametoindex(), IF_NAMESIZE */
71
71
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
getuid(), getgid(), setuid(),
75
setgid() */
74
getuid(), getgid(), seteuid(),
75
setgid(), pause() */
76
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
77
#include <iso646.h> /* not, or, and */
78
78
#include <argp.h> /* struct argp_option, error_t, struct
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
84
84
raise() */
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
85
87
86
88
#ifdef __linux__
87
89
#include <sys/klog.h> /* klogctl() */
125
127
static const char mandos_protocol_version[] = "1";
126
128
const char *argp_program_version = "mandos-client " VERSION;
127
129
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
130
static const char sys_class_net[] = "/sys/class/net";
131
char *connect_to = NULL;
128
132
129
133
/* Used for passing in values through the Avahi callback functions */
130
134
typedef struct {
142
146
.dh_bits = 1024, .priority = "SECURE256"
143
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
144
148
149
sig_atomic_t quit_now = 0;
150
int signal_received = 0;
151
145
152
/*
146
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
147
154
* bytes. "buffer_capacity" is how much is currently allocated,
474
481
static int init_gnutls_session(gnutls_session_t *session){
475
482
int ret;
476
483
/* GnuTLS session creation */
477
ret = gnutls_init(session, GNUTLS_SERVER);
484
do {
485
ret = gnutls_init(session, GNUTLS_SERVER);
486
if(quit_now){
487
return -1;
488
}
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
478
490
if(ret != GNUTLS_E_SUCCESS){
479
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
480
492
safer_gnutls_strerror(ret));
482
494
483
495
{
484
496
const char *err;
485
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
497
do {
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
499
if(quit_now){
500
gnutls_deinit(*session);
501
return -1;
502
}
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
486
504
if(ret != GNUTLS_E_SUCCESS){
487
505
fprintf(stderr, "Syntax error at: %s\n", err);
488
506
fprintf(stderr, "GnuTLS error: %s\n",
492
510
}
493
511
}
494
512
495
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
496
mc.cred);
513
do {
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
515
mc.cred);
516
if(quit_now){
517
gnutls_deinit(*session);
518
return -1;
519
}
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
497
521
if(ret != GNUTLS_E_SUCCESS){
498
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
499
523
safer_gnutls_strerror(ret));
502
526
}
503
527
504
528
/* ignore client certificate if any. */
505
gnutls_certificate_server_set_request(*session,
506
GNUTLS_CERT_IGNORE);
529
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
507
530
508
531
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
509
532
514
537
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
515
538
__attribute__((unused)) const char *txt){}
516
539
517
sig_atomic_t quit_now = 0;
518
int signal_received = 0;
519
520
540
/* Called when a Mandos server is found */
521
541
static int start_mandos_communication(const char *ip, uint16_t port,
522
542
AvahiIfIndex if_index,
528
548
struct sockaddr_in6 in6;
529
549
} to;
530
550
char *buffer = NULL;
531
char *decrypted_buffer;
551
char *decrypted_buffer = NULL;
532
552
size_t buffer_length = 0;
533
553
size_t buffer_capacity = 0;
534
554
size_t written;
535
int retval = 0;
555
int retval = -1;
536
556
gnutls_session_t session;
537
557
int pf; /* Protocol family */
538
558
559
errno = 0;
560
539
561
if(quit_now){
562
errno = EINTR;
540
563
return -1;
541
564
}
542
565
549
572
break;
550
573
default:
551
574
fprintf(stderr, "Bad address family: %d\n", af);
575
errno = EINVAL;
552
576
return -1;
553
577
}
554
578
564
588
565
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
566
590
if(tcp_sd < 0){
591
int e = errno;
567
592
perror("socket");
568
retval = -1;
593
errno = e;
569
594
goto mandos_end;
570
595
}
571
596
572
597
if(quit_now){
598
errno = EINTR;
573
599
goto mandos_end;
574
600
}
575
601
582
608
ret = inet_pton(af, ip, &to.in.sin_addr);
583
609
}
584
610
if(ret < 0 ){
611
int e = errno;
585
612
perror("inet_pton");
586
retval = -1;
613
errno = e;
587
614
goto mandos_end;
588
615
}
589
616
if(ret == 0){
617
int e = errno;
590
618
fprintf(stderr, "Bad address: %s\n", ip);
591
retval = -1;
619
errno = e;
592
620
goto mandos_end;
593
621
}
594
622
if(af == AF_INET6){
602
630
if(if_index == AVAHI_IF_UNSPEC){
603
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
604
632
" without a network interface\n");
605
retval = -1;
633
errno = EINVAL;
606
634
goto mandos_end;
607
635
}
608
636
/* Set the network interface number as scope */
615
643
}
616
644
617
645
if(quit_now){
646
errno = EINTR;
618
647
goto mandos_end;
619
648
}
620
649
651
680
}
652
681
653
682
if(quit_now){
683
errno = EINTR;
654
684
goto mandos_end;
655
685
}
656
686
660
690
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
661
691
}
662
692
if(ret < 0){
663
perror("connect");
664
retval = -1;
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
int e = errno;
695
perror("connect");
696
errno = e;
697
}
665
698
goto mandos_end;
666
699
}
667
700
668
701
if(quit_now){
702
errno = EINTR;
669
703
goto mandos_end;
670
704
}
671
705
676
710
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
677
711
out_size - written));
678
712
if(ret == -1){
713
int e = errno;
679
714
perror("write");
680
retval = -1;
715
errno = e;
681
716
goto mandos_end;
682
717
}
683
718
written += (size_t)ret;
693
728
}
694
729
695
730
if(quit_now){
731
errno = EINTR;
696
732
goto mandos_end;
697
733
}
698
734
}
702
738
}
703
739
704
740
if(quit_now){
741
errno = EINTR;
705
742
goto mandos_end;
706
743
}
707
744
708
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
709
746
710
747
if(quit_now){
748
errno = EINTR;
711
749
goto mandos_end;
712
750
}
713
751
714
do{
752
do {
715
753
ret = gnutls_handshake(session);
716
754
if(quit_now){
755
errno = EINTR;
717
756
goto mandos_end;
718
757
}
719
758
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
723
762
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
724
763
gnutls_perror(ret);
725
764
}
726
retval = -1;
765
errno = EPROTO;
727
766
goto mandos_end;
728
767
}
729
768
737
776
while(true){
738
777
739
778
if(quit_now){
779
errno = EINTR;
740
780
goto mandos_end;
741
781
}
742
782
743
783
buffer_capacity = incbuffer(&buffer, buffer_length,
744
784
buffer_capacity);
745
785
if(buffer_capacity == 0){
786
int e = errno;
746
787
perror("incbuffer");
747
retval = -1;
788
errno = e;
748
789
goto mandos_end;
749
790
}
750
791
751
792
if(quit_now){
793
errno = EINTR;
752
794
goto mandos_end;
753
795
}
754
796
763
805
case GNUTLS_E_AGAIN:
764
806
break;
765
807
case GNUTLS_E_REHANDSHAKE:
766
do{
808
do {
767
809
ret = gnutls_handshake(session);
768
810
769
811
if(quit_now){
812
errno = EINTR;
770
813
goto mandos_end;
771
814
}
772
815
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
773
816
if(ret < 0){
774
817
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
775
818
gnutls_perror(ret);
776
retval = -1;
819
errno = EPROTO;
777
820
goto mandos_end;
778
821
}
779
822
break;
780
823
default:
781
824
fprintf(stderr, "Unknown error while reading data from"
782
825
" encrypted session with Mandos server\n");
783
retval = -1;
784
826
gnutls_bye(session, GNUTLS_SHUT_RDWR);
827
errno = EIO;
785
828
goto mandos_end;
786
829
}
787
830
} else {
794
837
}
795
838
796
839
if(quit_now){
797
goto mandos_end;
798
}
799
800
gnutls_bye(session, GNUTLS_SHUT_RDWR);
801
802
if(quit_now){
803
goto mandos_end;
804
}
840
errno = EINTR;
841
goto mandos_end;
842
}
843
844
do {
845
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
846
if(quit_now){
847
errno = EINTR;
848
goto mandos_end;
849
}
850
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
805
851
806
852
if(buffer_length > 0){
807
853
ssize_t decrypted_buffer_size;
813
859
written = 0;
814
860
while(written < (size_t) decrypted_buffer_size){
815
861
if(quit_now){
862
errno = EINTR;
816
863
goto mandos_end;
817
864
}
818
865
820
867
(size_t)decrypted_buffer_size - written,
821
868
stdout);
822
869
if(ret == 0 and ferror(stdout)){
870
int e = errno;
823
871
if(debug){
824
872
fprintf(stderr, "Error writing encrypted data: %s\n",
825
873
strerror(errno));
826
874
}
827
retval = -1;
828
break;
875
errno = e;
876
goto mandos_end;
829
877
}
830
878
written += (size_t)ret;
831
879
}
832
free(decrypted_buffer);
833
} else {
834
retval = -1;
880
retval = 0;
835
881
}
836
} else {
837
retval = -1;
838
882
}
839
883
840
884
/* Shutdown procedure */
841
885
842
886
mandos_end:
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;
887
{
888
int e = errno;
889
free(decrypted_buffer);
890
free(buffer);
891
if(tcp_sd >= 0){
892
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
893
}
894
if(ret == -1){
895
if(e == 0){
896
e = errno;
897
}
898
perror("close");
899
}
900
gnutls_deinit(session);
901
if(quit_now){
902
e = EINTR;
903
retval = -1;
904
}
905
errno = e;
853
906
}
854
907
return retval;
855
908
}
971
1024
errno = old_errno;
972
1025
}
973
1026
1027
/*
1028
* This function determines if a directory entry in /sys/class/net
1029
* corresponds to an acceptable network device.
1030
* (This function is passed to scandir(3) as a filter function.)
1031
*/
1032
int good_interface(const struct dirent *if_entry){
1033
ssize_t ssret;
1034
char *flagname = NULL;
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1036
if_entry->d_name);
1037
if(ret < 0){
1038
perror("asprintf");
1039
return 0;
1040
}
1041
if(if_entry->d_name[0] == '.'){
1042
return 0;
1043
}
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
if(flags_fd == -1){
1046
perror("open");
1047
return 0;
1048
}
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1050
/* read line from flags_fd */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1053
flagstring[(size_t)to_read] = '\0';
1054
if(flagstring == NULL){
1055
perror("malloc");
1056
close(flags_fd);
1057
return 0;
1058
}
1059
while(to_read > 0){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1061
(size_t)to_read));
1062
if(ssret == -1){
1063
perror("read");
1064
free(flagstring);
1065
close(flags_fd);
1066
return 0;
1067
}
1068
to_read -= ssret;
1069
if(ssret == 0){
1070
break;
1071
}
1072
}
1073
close(flags_fd);
1074
intmax_t tmpmax;
1075
char *tmp;
1076
errno = 0;
1077
tmpmax = strtoimax(flagstring, &tmp, 0);
1078
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1079
and not (isspace(*tmp)))
1080
or tmpmax != (ifreq_flags)tmpmax){
1081
if(debug){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1084
}
1085
free(flagstring);
1086
return 0;
1087
}
1088
free(flagstring);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1090
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1092
if(debug){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1094
if_entry->d_name);
1095
}
1096
return 0;
1097
}
1098
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1100
if(debug){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1102
if_entry->d_name);
1103
}
1104
return 1;
1105
}
1106
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1108
if(debug){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1110
if_entry->d_name);
1111
}
1112
return 0;
1113
}
1114
/* Accept this device */
1115
if(debug){
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1117
if_entry->d_name);
1118
}
1119
return 1;
1120
}
1121
974
1122
int main(int argc, char *argv[]){
975
1123
AvahiSServiceBrowser *sb = NULL;
976
1124
int error;
978
1126
intmax_t tmpmax;
979
1127
char *tmp;
980
1128
int exitcode = EXIT_SUCCESS;
981
const char *interface = "eth0";
1129
const char *interface = "";
982
1130
struct ifreq network;
983
1131
int sd = -1;
984
1132
bool take_down_interface = false;
985
1133
uid_t uid;
986
1134
gid_t gid;
987
char *connect_to = NULL;
988
1135
char tempdir[] = "/tmp/mandosXXXXXX";
989
1136
bool tempdir_created = false;
990
1137
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
995
1142
bool gpgme_initialized = false;
996
1143
float delay = 2.5f;
997
1144
998
struct sigaction old_sigterm_action;
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
999
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1000
1147
1148
uid = getuid();
1149
gid = getgid();
1150
1151
/* Lower any group privileges we might have, just to be safe */
1152
errno = 0;
1153
ret = setgid(gid);
1154
if(ret == -1){
1155
perror("setgid");
1156
}
1157
1158
/* Lower user privileges (temporarily) */
1159
errno = 0;
1160
ret = seteuid(uid);
1161
if(ret == -1){
1162
perror("seteuid");
1163
}
1164
1165
if(quit_now){
1166
goto end;
1167
}
1168
1001
1169
{
1002
1170
struct argp_option options[] = {
1003
1171
{ .name = "debug", .key = 128,
1032
1200
.arg = "SECONDS",
1033
1201
.doc = "Maximum delay to wait for interface startup",
1034
1202
.group = 2 },
1203
/*
1204
* These reproduce what we would get without ARGP_NO_HELP
1205
*/
1206
{ .name = "help", .key = '?',
1207
.doc = "Give this help list", .group = -1 },
1208
{ .name = "usage", .key = -3,
1209
.doc = "Give a short usage message", .group = -1 },
1210
{ .name = "version", .key = 'V',
1211
.doc = "Print program version", .group = -1 },
1035
1212
{ .name = NULL }
1036
1213
};
1037
1214
1038
1215
error_t parse_opt(int key, char *arg,
1039
1216
struct argp_state *state){
1217
errno = 0;
1040
1218
switch(key){
1041
1219
case 128: /* --debug */
1042
1220
debug = true;
1058
1236
tmpmax = strtoimax(arg, &tmp, 10);
1059
1237
if(errno != 0 or tmp == arg or *tmp != '\0'
1060
1238
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1061
fprintf(stderr, "Bad number of DH bits\n");
1062
exit(EXIT_FAILURE);
1239
argp_error(state, "Bad number of DH bits");
1063
1240
}
1064
1241
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1065
1242
break;
1070
1247
errno = 0;
1071
1248
delay = strtof(arg, &tmp);
1072
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1073
fprintf(stderr, "Bad delay\n");
1074
exit(EXIT_FAILURE);
1250
argp_error(state, "Bad delay");
1075
1251
}
1076
1252
break;
1077
case ARGP_KEY_ARG:
1078
argp_usage(state);
1079
case ARGP_KEY_END:
1253
/*
1254
* These reproduce what we would get without ARGP_NO_HELP
1255
*/
1256
case '?': /* --help */
1257
argp_state_help(state, state->out_stream,
1258
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1259
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1260
case -3: /* --usage */
1261
argp_state_help(state, state->out_stream,
1262
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1263
case 'V': /* --version */
1264
fprintf(state->out_stream, "%s\n", argp_program_version);
1265
exit(argp_err_exit_status);
1080
1266
break;
1081
1267
default:
1082
1268
return ARGP_ERR_UNKNOWN;
1083
1269
}
1084
return 0;
1270
return errno;
1085
1271
}
1086
1272
1087
1273
struct argp argp = { .options = options, .parser = parse_opt,
1088
1274
.args_doc = "",
1089
1275
.doc = "Mandos client -- Get and decrypt"
1090
1276
" passwords from a Mandos server" };
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;
1277
ret = argp_parse(&argp, argc, argv,
1278
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1279
switch(ret){
1280
case 0:
1281
break;
1282
case ENOMEM:
1283
default:
1284
errno = ret;
1285
perror("argp_parse");
1286
exitcode = EX_OSERR;
1287
goto end;
1288
case EINVAL:
1289
exitcode = EX_USAGE;
1095
1290
goto end;
1096
1291
}
1097
1292
}
1099
1294
if(not debug){
1100
1295
avahi_set_log_function(empty_log);
1101
1296
}
1297
1298
if(interface[0] == '\0'){
1299
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1301
alphasort);
1302
if(ret >= 1){
1303
/* Pick the first good interface */
1304
interface = strdup(direntries[0]->d_name);
1305
if(debug){
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1307
}
1308
if(interface == NULL){
1309
perror("malloc");
1310
free(direntries);
1311
exitcode = EXIT_FAILURE;
1312
goto end;
1313
}
1314
free(direntries);
1315
} else {
1316
free(direntries);
1317
fprintf(stderr, "Could not find a network interface\n");
1318
exitcode = EXIT_FAILURE;
1319
goto end;
1320
}
1321
}
1102
1322
1103
1323
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1104
1324
from the signal handler */
1107
1327
mc.simple_poll = avahi_simple_poll_new();
1108
1328
if(mc.simple_poll == NULL){
1109
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1110
exitcode = EXIT_FAILURE;
1330
exitcode = EX_UNAVAILABLE;
1111
1331
goto end;
1112
1332
}
1113
1333
1115
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1116
1336
if(ret == -1){
1117
1337
perror("sigaddset");
1118
exitcode = EXIT_FAILURE;
1338
exitcode = EX_OSERR;
1119
1339
goto end;
1120
1340
}
1121
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1122
1342
if(ret == -1){
1123
1343
perror("sigaddset");
1124
exitcode = EXIT_FAILURE;
1344
exitcode = EX_OSERR;
1125
1345
goto end;
1126
1346
}
1127
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1128
1348
if(ret == -1){
1129
1349
perror("sigaddset");
1130
exitcode = EXIT_FAILURE;
1350
exitcode = EX_OSERR;
1131
1351
goto end;
1132
1352
}
1133
1353
/* Need to check if the handler is SIG_IGN before handling:
1137
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1138
1358
if(ret == -1){
1139
1359
perror("sigaction");
1140
return EXIT_FAILURE;
1360
return EX_OSERR;
1141
1361
}
1142
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
1143
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
1144
1364
if(ret == -1){
1145
1365
perror("sigaction");
1146
exitcode = EXIT_FAILURE;
1366
exitcode = EX_OSERR;
1147
1367
goto end;
1148
1368
}
1149
1369
}
1150
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1151
1371
if(ret == -1){
1152
1372
perror("sigaction");
1153
return EXIT_FAILURE;
1373
return EX_OSERR;
1154
1374
}
1155
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
1156
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1157
1377
if(ret == -1){
1158
1378
perror("sigaction");
1159
exitcode = EXIT_FAILURE;
1379
exitcode = EX_OSERR;
1160
1380
goto end;
1161
1381
}
1162
1382
}
1163
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1164
1384
if(ret == -1){
1165
1385
perror("sigaction");
1166
return EXIT_FAILURE;
1386
return EX_OSERR;
1167
1387
}
1168
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
1169
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1170
1390
if(ret == -1){
1171
1391
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
1392
exitcode = EX_OSERR;
1173
1393
goto end;
1174
1394
}
1175
1395
}
1176
1396
1177
1397
/* If the interface is down, bring it up */
1178
if(interface[0] != '\0'){
1398
if(strcmp(interface, "none") != 0){
1179
1399
if_index = (AvahiIfIndex) if_nametoindex(interface);
1180
1400
if(if_index == 0){
1181
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1182
exitcode = EXIT_FAILURE;
1402
exitcode = EX_UNAVAILABLE;
1183
1403
goto end;
1184
1404
}
1185
1405
1187
1407
goto end;
1188
1408
}
1189
1409
1410
/* Re-raise priviliges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror("seteuid");
1415
}
1416
1190
1417
#ifdef __linux__
1191
1418
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1192
messages to mess up the prompt */
1419
messages about the network interface to mess up the prompt */
1193
1420
ret = klogctl(8, NULL, 5);
1194
1421
bool restore_loglevel = true;
1195
1422
if(ret == -1){
1201
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1202
1429
if(sd < 0){
1203
1430
perror("socket");
1204
exitcode = EXIT_FAILURE;
1431
exitcode = EX_OSERR;
1205
1432
#ifdef __linux__
1206
1433
if(restore_loglevel){
1207
1434
ret = klogctl(7, NULL, 0);
1210
1437
}
1211
1438
}
1212
1439
#endif /* __linux__ */
1440
/* Lower privileges */
1441
errno = 0;
1442
ret = seteuid(uid);
1443
if(ret == -1){
1444
perror("seteuid");
1445
}
1213
1446
goto end;
1214
1447
}
1215
1448
strcpy(network.ifr_name, interface);
1224
1457
}
1225
1458
}
1226
1459
#endif /* __linux__ */
1227
exitcode = EXIT_FAILURE;
1460
exitcode = EX_OSERR;
1461
/* Lower privileges */
1462
errno = 0;
1463
ret = seteuid(uid);
1464
if(ret == -1){
1465
perror("seteuid");
1466
}
1228
1467
goto end;
1229
1468
}
1230
1469
if((network.ifr_flags & IFF_UP) == 0){
1233
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1234
1473
if(ret == -1){
1235
1474
take_down_interface = false;
1236
perror("ioctl SIOCSIFFLAGS");
1237
exitcode = EXIT_FAILURE;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1476
exitcode = EX_OSERR;
1238
1477
#ifdef __linux__
1239
1478
if(restore_loglevel){
1240
1479
ret = klogctl(7, NULL, 0);
1243
1482
}
1244
1483
}
1245
1484
#endif /* __linux__ */
1485
/* Lower privileges */
1486
errno = 0;
1487
ret = seteuid(uid);
1488
if(ret == -1){
1489
perror("seteuid");
1490
}
1246
1491
goto end;
1247
1492
}
1248
1493
}
1276
1521
}
1277
1522
}
1278
1523
#endif /* __linux__ */
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");
1524
/* Lower privileges */
1525
errno = 0;
1526
if(take_down_interface){
1527
/* Lower privileges */
1528
ret = seteuid(uid);
1529
if(ret == -1){
1530
perror("seteuid");
1531
}
1532
} else {
1533
/* Lower privileges permanently */
1534
ret = setuid(uid);
1535
if(ret == -1){
1536
perror("setuid");
1537
}
1538
}
1297
1539
}
1298
1540
1299
1541
if(quit_now){
1303
1545
ret = init_gnutls_global(pubkey, seckey);
1304
1546
if(ret == -1){
1305
1547
fprintf(stderr, "init_gnutls_global failed\n");
1306
exitcode = EXIT_FAILURE;
1548
exitcode = EX_UNAVAILABLE;
1307
1549
goto end;
1308
1550
} else {
1309
1551
gnutls_initialized = true;
1326
1568
1327
1569
if(not init_gpgme(pubkey, seckey, tempdir)){
1328
1570
fprintf(stderr, "init_gpgme failed\n");
1329
exitcode = EXIT_FAILURE;
1571
exitcode = EX_UNAVAILABLE;
1330
1572
goto end;
1331
1573
} else {
1332
1574
gpgme_initialized = true;
1342
1584
char *address = strrchr(connect_to, ':');
1343
1585
if(address == NULL){
1344
1586
fprintf(stderr, "No colon in address\n");
1345
exitcode = EXIT_FAILURE;
1587
exitcode = EX_USAGE;
1346
1588
goto end;
1347
1589
}
1348
1590
1356
1598
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1357
1599
or tmpmax != (uint16_t)tmpmax){
1358
1600
fprintf(stderr, "Bad port number\n");
1359
exitcode = EXIT_FAILURE;
1601
exitcode = EX_USAGE;
1360
1602
goto end;
1361
1603
}
1362
1604
1378
1620
if(quit_now){
1379
1621
goto end;
1380
1622
}
1381
1382
ret = start_mandos_communication(address, port, if_index, af);
1383
if(ret < 0){
1384
exitcode = EXIT_FAILURE;
1385
} else {
1623
1624
while(not quit_now){
1625
ret = start_mandos_communication(address, port, if_index, af);
1626
if(quit_now or ret == 0){
1627
break;
1628
}
1629
sleep(15);
1630
};
1631
1632
if (not quit_now){
1386
1633
exitcode = EXIT_SUCCESS;
1387
1634
}
1635
1388
1636
goto end;
1389
1637
}
1390
1638
1414
1662
if(mc.server == NULL){
1415
1663
fprintf(stderr, "Failed to create Avahi server: %s\n",
1416
1664
avahi_strerror(error));
1417
exitcode = EXIT_FAILURE;
1665
exitcode = EX_UNAVAILABLE;
1418
1666
goto end;
1419
1667
}
1420
1668
1429
1677
if(sb == NULL){
1430
1678
fprintf(stderr, "Failed to create service browser: %s\n",
1431
1679
avahi_strerror(avahi_server_errno(mc.server)));
1432
exitcode = EXIT_FAILURE;
1680
exitcode = EX_UNAVAILABLE;
1433
1681
goto end;
1434
1682
}
1435
1683
1473
1721
1474
1722
/* Take down the network interface */
1475
1723
if(take_down_interface){
1476
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1724
/* Re-raise priviliges */
1725
errno = 0;
1726
ret = seteuid(0);
1477
1727
if(ret == -1){
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
}
1728
perror("seteuid");
1485
1729
}
1486
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1487
if(ret == -1){
1488
perror("close");
1730
if(geteuid() == 0){
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1732
if(ret == -1){
1733
perror("ioctl SIOCGIFFLAGS");
1734
} else if(network.ifr_flags & IFF_UP) {
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1737
if(ret == -1){
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1739
}
1740
}
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1742
if(ret == -1){
1743
perror("close");
1744
}
1745
/* Lower privileges permanently */
1746
errno = 0;
1747
ret = setuid(uid);
1748
if(ret == -1){
1749
perror("setuid");
1750
}
1489
1751
}
1490
1752
}
1491
1753
1536
1798
if(quit_now){
1537
1799
sigemptyset(&old_sigterm_action.sa_mask);
1538
1800
old_sigterm_action.sa_handler = SIG_DFL;
1539
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1801
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1802
&old_sigterm_action,
1803
NULL));
1540
1804
if(ret == -1){
1541
1805
perror("sigaction");
1542
1806
}
1543
raise(signal_received);
1807
do {
1808
ret = raise(signal_received);
1809
} while(ret != 0 and errno == EINTR);
1810
if(ret != 0){
1811
perror("raise");
1812
abort();
1813
}
1814
TEMP_FAILURE_RETRY(pause());
1544
1815
}
1545
1816
1546
1817
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0