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- Committer: Teddy Hogeborn
- Date: 2010-09-12 03:22:48 UTC
- Revision ID: teddy@fukt.bsnet.se-20100912032248-6cizkymqivr5uzwm
* Makefile (run-server): Remove warning about now-eliminated error.
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() */
72
72
*/
73
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
74
getuid(), getgid(), seteuid(),
75
setgid() */
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,
476
483
/* GnuTLS session creation */
477
484
do {
478
485
ret = gnutls_init(session, GNUTLS_SERVER);
486
if(quit_now){
487
return -1;
488
}
479
489
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
480
490
if(ret != GNUTLS_E_SUCCESS){
481
491
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
486
496
const char *err;
487
497
do {
488
498
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
499
if(quit_now){
500
gnutls_deinit(*session);
501
return -1;
502
}
489
503
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
490
504
if(ret != GNUTLS_E_SUCCESS){
491
505
fprintf(stderr, "Syntax error at: %s\n", err);
499
513
do {
500
514
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
501
515
mc.cred);
516
if(quit_now){
517
gnutls_deinit(*session);
518
return -1;
519
}
502
520
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
503
521
if(ret != GNUTLS_E_SUCCESS){
504
522
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
519
537
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
520
538
__attribute__((unused)) const char *txt){}
521
539
522
sig_atomic_t quit_now = 0;
523
int signal_received = 0;
524
525
540
/* Called when a Mandos server is found */
526
541
static int start_mandos_communication(const char *ip, uint16_t port,
527
542
AvahiIfIndex if_index,
533
548
struct sockaddr_in6 in6;
534
549
} to;
535
550
char *buffer = NULL;
536
char *decrypted_buffer;
551
char *decrypted_buffer = NULL;
537
552
size_t buffer_length = 0;
538
553
size_t buffer_capacity = 0;
539
554
size_t written;
540
int retval = 0;
555
int retval = -1;
541
556
gnutls_session_t session;
542
557
int pf; /* Protocol family */
543
558
559
errno = 0;
560
544
561
if(quit_now){
562
errno = EINTR;
545
563
return -1;
546
564
}
547
565
554
572
break;
555
573
default:
556
574
fprintf(stderr, "Bad address family: %d\n", af);
575
errno = EINVAL;
557
576
return -1;
558
577
}
559
578
569
588
570
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
571
590
if(tcp_sd < 0){
591
int e = errno;
572
592
perror("socket");
573
retval = -1;
593
errno = e;
574
594
goto mandos_end;
575
595
}
576
596
577
597
if(quit_now){
598
errno = EINTR;
578
599
goto mandos_end;
579
600
}
580
601
587
608
ret = inet_pton(af, ip, &to.in.sin_addr);
588
609
}
589
610
if(ret < 0 ){
611
int e = errno;
590
612
perror("inet_pton");
591
retval = -1;
613
errno = e;
592
614
goto mandos_end;
593
615
}
594
616
if(ret == 0){
617
int e = errno;
595
618
fprintf(stderr, "Bad address: %s\n", ip);
596
retval = -1;
619
errno = e;
597
620
goto mandos_end;
598
621
}
599
622
if(af == AF_INET6){
607
630
if(if_index == AVAHI_IF_UNSPEC){
608
631
fprintf(stderr, "An IPv6 link-local address is incomplete"
609
632
" without a network interface\n");
610
retval = -1;
633
errno = EINVAL;
611
634
goto mandos_end;
612
635
}
613
636
/* Set the network interface number as scope */
620
643
}
621
644
622
645
if(quit_now){
646
errno = EINTR;
623
647
goto mandos_end;
624
648
}
625
649
656
680
}
657
681
658
682
if(quit_now){
683
errno = EINTR;
659
684
goto mandos_end;
660
685
}
661
686
665
690
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
666
691
}
667
692
if(ret < 0){
693
int e = errno;
668
694
perror("connect");
669
retval = -1;
695
errno = e;
670
696
goto mandos_end;
671
697
}
672
698
673
699
if(quit_now){
700
errno = EINTR;
674
701
goto mandos_end;
675
702
}
676
703
681
708
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
682
709
out_size - written));
683
710
if(ret == -1){
711
int e = errno;
684
712
perror("write");
685
retval = -1;
713
errno = e;
686
714
goto mandos_end;
687
715
}
688
716
written += (size_t)ret;
698
726
}
699
727
700
728
if(quit_now){
729
errno = EINTR;
701
730
goto mandos_end;
702
731
}
703
732
}
707
736
}
708
737
709
738
if(quit_now){
739
errno = EINTR;
710
740
goto mandos_end;
711
741
}
712
742
713
743
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
714
744
715
745
if(quit_now){
746
errno = EINTR;
716
747
goto mandos_end;
717
748
}
718
749
719
750
do {
720
751
ret = gnutls_handshake(session);
721
752
if(quit_now){
753
errno = EINTR;
722
754
goto mandos_end;
723
755
}
724
756
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
728
760
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
729
761
gnutls_perror(ret);
730
762
}
731
retval = -1;
763
errno = EPROTO;
732
764
goto mandos_end;
733
765
}
734
766
742
774
while(true){
743
775
744
776
if(quit_now){
777
errno = EINTR;
745
778
goto mandos_end;
746
779
}
747
780
748
781
buffer_capacity = incbuffer(&buffer, buffer_length,
749
782
buffer_capacity);
750
783
if(buffer_capacity == 0){
784
int e = errno;
751
785
perror("incbuffer");
752
retval = -1;
786
errno = e;
753
787
goto mandos_end;
754
788
}
755
789
756
790
if(quit_now){
791
errno = EINTR;
757
792
goto mandos_end;
758
793
}
759
794
772
807
ret = gnutls_handshake(session);
773
808
774
809
if(quit_now){
810
errno = EINTR;
775
811
goto mandos_end;
776
812
}
777
813
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
778
814
if(ret < 0){
779
815
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
780
816
gnutls_perror(ret);
781
retval = -1;
817
errno = EPROTO;
782
818
goto mandos_end;
783
819
}
784
820
break;
785
821
default:
786
822
fprintf(stderr, "Unknown error while reading data from"
787
823
" encrypted session with Mandos server\n");
788
retval = -1;
789
824
gnutls_bye(session, GNUTLS_SHUT_RDWR);
825
errno = EIO;
790
826
goto mandos_end;
791
827
}
792
828
} else {
799
835
}
800
836
801
837
if(quit_now){
802
goto mandos_end;
803
}
804
805
gnutls_bye(session, GNUTLS_SHUT_RDWR);
806
807
if(quit_now){
808
goto mandos_end;
809
}
838
errno = EINTR;
839
goto mandos_end;
840
}
841
842
do {
843
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
844
if(quit_now){
845
errno = EINTR;
846
goto mandos_end;
847
}
848
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
810
849
811
850
if(buffer_length > 0){
812
851
ssize_t decrypted_buffer_size;
818
857
written = 0;
819
858
while(written < (size_t) decrypted_buffer_size){
820
859
if(quit_now){
860
errno = EINTR;
821
861
goto mandos_end;
822
862
}
823
863
825
865
(size_t)decrypted_buffer_size - written,
826
866
stdout);
827
867
if(ret == 0 and ferror(stdout)){
868
int e = errno;
828
869
if(debug){
829
870
fprintf(stderr, "Error writing encrypted data: %s\n",
830
871
strerror(errno));
831
872
}
832
retval = -1;
833
break;
873
errno = e;
874
goto mandos_end;
834
875
}
835
876
written += (size_t)ret;
836
877
}
837
free(decrypted_buffer);
838
} else {
839
retval = -1;
878
retval = 0;
840
879
}
841
} else {
842
retval = -1;
843
880
}
844
881
845
882
/* Shutdown procedure */
846
883
847
884
mandos_end:
848
free(buffer);
849
if(tcp_sd >= 0){
850
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
851
}
852
if(ret == -1){
853
perror("close");
854
}
855
gnutls_deinit(session);
856
if(quit_now){
857
retval = -1;
885
{
886
int e = errno;
887
free(decrypted_buffer);
888
free(buffer);
889
if(tcp_sd >= 0){
890
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
891
}
892
if(ret == -1){
893
if(e == 0){
894
e = errno;
895
}
896
perror("close");
897
}
898
gnutls_deinit(session);
899
if(quit_now){
900
e = EINTR;
901
retval = -1;
902
}
903
errno = e;
858
904
}
859
905
return retval;
860
906
}
976
1022
errno = old_errno;
977
1023
}
978
1024
1025
/*
1026
* This function determines if a directory entry in /sys/class/net
1027
* corresponds to an acceptable network device.
1028
* (This function is passed to scandir(3) as a filter function.)
1029
*/
1030
int good_interface(const struct dirent *if_entry){
1031
ssize_t ssret;
1032
char *flagname = NULL;
1033
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1034
if_entry->d_name);
1035
if(ret < 0){
1036
perror("asprintf");
1037
return 0;
1038
}
1039
if(if_entry->d_name[0] == '.'){
1040
return 0;
1041
}
1042
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1043
if(flags_fd == -1){
1044
perror("open");
1045
return 0;
1046
}
1047
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
/* read line from flags_fd */
1049
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1050
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1051
flagstring[(size_t)to_read] = '\0';
1052
if(flagstring == NULL){
1053
perror("malloc");
1054
close(flags_fd);
1055
return 0;
1056
}
1057
while(to_read > 0){
1058
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1059
(size_t)to_read));
1060
if(ssret == -1){
1061
perror("read");
1062
free(flagstring);
1063
close(flags_fd);
1064
return 0;
1065
}
1066
to_read -= ssret;
1067
if(ssret == 0){
1068
break;
1069
}
1070
}
1071
close(flags_fd);
1072
intmax_t tmpmax;
1073
char *tmp;
1074
errno = 0;
1075
tmpmax = strtoimax(flagstring, &tmp, 0);
1076
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
and not (isspace(*tmp)))
1078
or tmpmax != (ifreq_flags)tmpmax){
1079
if(debug){
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1082
}
1083
free(flagstring);
1084
return 0;
1085
}
1086
free(flagstring);
1087
ifreq_flags flags = (ifreq_flags)tmpmax;
1088
/* Reject the loopback device */
1089
if(flags & IFF_LOOPBACK){
1090
if(debug){
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1092
if_entry->d_name);
1093
}
1094
return 0;
1095
}
1096
/* Accept point-to-point devices only if connect_to is specified */
1097
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1098
if(debug){
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1100
if_entry->d_name);
1101
}
1102
return 1;
1103
}
1104
/* Otherwise, reject non-broadcast-capable devices */
1105
if(not (flags & IFF_BROADCAST)){
1106
if(debug){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1108
if_entry->d_name);
1109
}
1110
return 0;
1111
}
1112
/* Accept this device */
1113
if(debug){
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1115
if_entry->d_name);
1116
}
1117
return 1;
1118
}
1119
979
1120
int main(int argc, char *argv[]){
980
1121
AvahiSServiceBrowser *sb = NULL;
981
1122
int error;
983
1124
intmax_t tmpmax;
984
1125
char *tmp;
985
1126
int exitcode = EXIT_SUCCESS;
986
const char *interface = "eth0";
1127
const char *interface = "";
987
1128
struct ifreq network;
988
1129
int sd = -1;
989
1130
bool take_down_interface = false;
990
1131
uid_t uid;
991
1132
gid_t gid;
992
char *connect_to = NULL;
993
1133
char tempdir[] = "/tmp/mandosXXXXXX";
994
1134
bool tempdir_created = false;
995
1135
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1058
1198
.arg = "SECONDS",
1059
1199
.doc = "Maximum delay to wait for interface startup",
1060
1200
.group = 2 },
1201
/*
1202
* These reproduce what we would get without ARGP_NO_HELP
1203
*/
1204
{ .name = "help", .key = '?',
1205
.doc = "Give this help list", .group = -1 },
1206
{ .name = "usage", .key = -3,
1207
.doc = "Give a short usage message", .group = -1 },
1208
{ .name = "version", .key = 'V',
1209
.doc = "Print program version", .group = -1 },
1061
1210
{ .name = NULL }
1062
1211
};
1063
1212
1064
1213
error_t parse_opt(int key, char *arg,
1065
1214
struct argp_state *state){
1215
errno = 0;
1066
1216
switch(key){
1067
1217
case 128: /* --debug */
1068
1218
debug = true;
1084
1234
tmpmax = strtoimax(arg, &tmp, 10);
1085
1235
if(errno != 0 or tmp == arg or *tmp != '\0'
1086
1236
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1087
fprintf(stderr, "Bad number of DH bits\n");
1088
exit(EXIT_FAILURE);
1237
argp_error(state, "Bad number of DH bits");
1089
1238
}
1090
1239
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1091
1240
break;
1096
1245
errno = 0;
1097
1246
delay = strtof(arg, &tmp);
1098
1247
if(errno != 0 or tmp == arg or *tmp != '\0'){
1099
fprintf(stderr, "Bad delay\n");
1100
exit(EXIT_FAILURE);
1248
argp_error(state, "Bad delay");
1101
1249
}
1102
1250
break;
1103
case ARGP_KEY_ARG:
1104
argp_usage(state);
1105
case ARGP_KEY_END:
1251
/*
1252
* These reproduce what we would get without ARGP_NO_HELP
1253
*/
1254
case '?': /* --help */
1255
argp_state_help(state, state->out_stream,
1256
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1257
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1258
case -3: /* --usage */
1259
argp_state_help(state, state->out_stream,
1260
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1261
case 'V': /* --version */
1262
fprintf(state->out_stream, "%s\n", argp_program_version);
1263
exit(argp_err_exit_status);
1106
1264
break;
1107
1265
default:
1108
1266
return ARGP_ERR_UNKNOWN;
1109
1267
}
1110
return 0;
1268
return errno;
1111
1269
}
1112
1270
1113
1271
struct argp argp = { .options = options, .parser = parse_opt,
1114
1272
.args_doc = "",
1115
1273
.doc = "Mandos client -- Get and decrypt"
1116
1274
" passwords from a Mandos server" };
1117
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1118
if(ret == ARGP_ERR_UNKNOWN){
1119
fprintf(stderr, "Unknown error while parsing arguments\n");
1120
exitcode = EXIT_FAILURE;
1275
ret = argp_parse(&argp, argc, argv,
1276
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1277
switch(ret){
1278
case 0:
1279
break;
1280
case ENOMEM:
1281
default:
1282
errno = ret;
1283
perror("argp_parse");
1284
exitcode = EX_OSERR;
1285
goto end;
1286
case EINVAL:
1287
exitcode = EX_USAGE;
1121
1288
goto end;
1122
1289
}
1123
1290
}
1125
1292
if(not debug){
1126
1293
avahi_set_log_function(empty_log);
1127
1294
}
1295
1296
if(interface[0] == '\0'){
1297
struct dirent **direntries;
1298
ret = scandir(sys_class_net, &direntries, good_interface,
1299
alphasort);
1300
if(ret >= 1){
1301
/* Pick the first good interface */
1302
interface = strdup(direntries[0]->d_name);
1303
if(debug){
1304
fprintf(stderr, "Using interface \"%s\"\n", interface);
1305
}
1306
if(interface == NULL){
1307
perror("malloc");
1308
free(direntries);
1309
exitcode = EXIT_FAILURE;
1310
goto end;
1311
}
1312
free(direntries);
1313
} else {
1314
free(direntries);
1315
fprintf(stderr, "Could not find a network interface\n");
1316
exitcode = EXIT_FAILURE;
1317
goto end;
1318
}
1319
}
1128
1320
1129
1321
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1130
1322
from the signal handler */
1133
1325
mc.simple_poll = avahi_simple_poll_new();
1134
1326
if(mc.simple_poll == NULL){
1135
1327
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1136
exitcode = EXIT_FAILURE;
1328
exitcode = EX_UNAVAILABLE;
1137
1329
goto end;
1138
1330
}
1139
1331
1141
1333
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1142
1334
if(ret == -1){
1143
1335
perror("sigaddset");
1144
exitcode = EXIT_FAILURE;
1336
exitcode = EX_OSERR;
1145
1337
goto end;
1146
1338
}
1147
1339
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1148
1340
if(ret == -1){
1149
1341
perror("sigaddset");
1150
exitcode = EXIT_FAILURE;
1342
exitcode = EX_OSERR;
1151
1343
goto end;
1152
1344
}
1153
1345
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1154
1346
if(ret == -1){
1155
1347
perror("sigaddset");
1156
exitcode = EXIT_FAILURE;
1348
exitcode = EX_OSERR;
1157
1349
goto end;
1158
1350
}
1159
1351
/* Need to check if the handler is SIG_IGN before handling:
1163
1355
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1164
1356
if(ret == -1){
1165
1357
perror("sigaction");
1166
return EXIT_FAILURE;
1358
return EX_OSERR;
1167
1359
}
1168
1360
if(old_sigterm_action.sa_handler != SIG_IGN){
1169
1361
ret = sigaction(SIGINT, &sigterm_action, NULL);
1170
1362
if(ret == -1){
1171
1363
perror("sigaction");
1172
exitcode = EXIT_FAILURE;
1364
exitcode = EX_OSERR;
1173
1365
goto end;
1174
1366
}
1175
1367
}
1176
1368
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1177
1369
if(ret == -1){
1178
1370
perror("sigaction");
1179
return EXIT_FAILURE;
1371
return EX_OSERR;
1180
1372
}
1181
1373
if(old_sigterm_action.sa_handler != SIG_IGN){
1182
1374
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1183
1375
if(ret == -1){
1184
1376
perror("sigaction");
1185
exitcode = EXIT_FAILURE;
1377
exitcode = EX_OSERR;
1186
1378
goto end;
1187
1379
}
1188
1380
}
1189
1381
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1190
1382
if(ret == -1){
1191
1383
perror("sigaction");
1192
return EXIT_FAILURE;
1384
return EX_OSERR;
1193
1385
}
1194
1386
if(old_sigterm_action.sa_handler != SIG_IGN){
1195
1387
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1196
1388
if(ret == -1){
1197
1389
perror("sigaction");
1198
exitcode = EXIT_FAILURE;
1390
exitcode = EX_OSERR;
1199
1391
goto end;
1200
1392
}
1201
1393
}
1202
1394
1203
1395
/* If the interface is down, bring it up */
1204
if(interface[0] != '\0'){
1396
if(strcmp(interface, "none") != 0){
1205
1397
if_index = (AvahiIfIndex) if_nametoindex(interface);
1206
1398
if(if_index == 0){
1207
1399
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1208
exitcode = EXIT_FAILURE;
1400
exitcode = EX_UNAVAILABLE;
1209
1401
goto end;
1210
1402
}
1211
1403
1222
1414
1223
1415
#ifdef __linux__
1224
1416
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1225
messages to mess up the prompt */
1417
messages about the network interface to mess up the prompt */
1226
1418
ret = klogctl(8, NULL, 5);
1227
1419
bool restore_loglevel = true;
1228
1420
if(ret == -1){
1234
1426
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1235
1427
if(sd < 0){
1236
1428
perror("socket");
1237
exitcode = EXIT_FAILURE;
1429
exitcode = EX_OSERR;
1238
1430
#ifdef __linux__
1239
1431
if(restore_loglevel){
1240
1432
ret = klogctl(7, NULL, 0);
1263
1455
}
1264
1456
}
1265
1457
#endif /* __linux__ */
1266
exitcode = EXIT_FAILURE;
1458
exitcode = EX_OSERR;
1267
1459
/* Lower privileges */
1268
1460
errno = 0;
1269
1461
ret = seteuid(uid);
1278
1470
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1279
1471
if(ret == -1){
1280
1472
take_down_interface = false;
1281
perror("ioctl SIOCSIFFLAGS");
1282
exitcode = EXIT_FAILURE;
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1474
exitcode = EX_OSERR;
1283
1475
#ifdef __linux__
1284
1476
if(restore_loglevel){
1285
1477
ret = klogctl(7, NULL, 0);
1351
1543
ret = init_gnutls_global(pubkey, seckey);
1352
1544
if(ret == -1){
1353
1545
fprintf(stderr, "init_gnutls_global failed\n");
1354
exitcode = EXIT_FAILURE;
1546
exitcode = EX_UNAVAILABLE;
1355
1547
goto end;
1356
1548
} else {
1357
1549
gnutls_initialized = true;
1374
1566
1375
1567
if(not init_gpgme(pubkey, seckey, tempdir)){
1376
1568
fprintf(stderr, "init_gpgme failed\n");
1377
exitcode = EXIT_FAILURE;
1569
exitcode = EX_UNAVAILABLE;
1378
1570
goto end;
1379
1571
} else {
1380
1572
gpgme_initialized = true;
1390
1582
char *address = strrchr(connect_to, ':');
1391
1583
if(address == NULL){
1392
1584
fprintf(stderr, "No colon in address\n");
1393
exitcode = EXIT_FAILURE;
1585
exitcode = EX_USAGE;
1394
1586
goto end;
1395
1587
}
1396
1588
1404
1596
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1405
1597
or tmpmax != (uint16_t)tmpmax){
1406
1598
fprintf(stderr, "Bad port number\n");
1407
exitcode = EXIT_FAILURE;
1599
exitcode = EX_USAGE;
1408
1600
goto end;
1409
1601
}
1410
1602
1429
1621
1430
1622
ret = start_mandos_communication(address, port, if_index, af);
1431
1623
if(ret < 0){
1432
exitcode = EXIT_FAILURE;
1624
switch(errno){
1625
case ENETUNREACH:
1626
case EHOSTDOWN:
1627
case EHOSTUNREACH:
1628
exitcode = EX_NOHOST;
1629
break;
1630
case EINVAL:
1631
exitcode = EX_USAGE;
1632
break;
1633
case EIO:
1634
exitcode = EX_IOERR;
1635
break;
1636
case EPROTO:
1637
exitcode = EX_PROTOCOL;
1638
break;
1639
default:
1640
exitcode = EX_OSERR;
1641
break;
1642
}
1433
1643
} else {
1434
1644
exitcode = EXIT_SUCCESS;
1435
1645
}
1462
1672
if(mc.server == NULL){
1463
1673
fprintf(stderr, "Failed to create Avahi server: %s\n",
1464
1674
avahi_strerror(error));
1465
exitcode = EXIT_FAILURE;
1675
exitcode = EX_UNAVAILABLE;
1466
1676
goto end;
1467
1677
}
1468
1678
1477
1687
if(sb == NULL){
1478
1688
fprintf(stderr, "Failed to create service browser: %s\n",
1479
1689
avahi_strerror(avahi_server_errno(mc.server)));
1480
exitcode = EXIT_FAILURE;
1690
exitcode = EX_UNAVAILABLE;
1481
1691
goto end;
1482
1692
}
1483
1693
1532
1742
if(ret == -1){
1533
1743
perror("ioctl SIOCGIFFLAGS");
1534
1744
} else if(network.ifr_flags & IFF_UP) {
1535
network.ifr_flags &= ~IFF_UP; /* clear flag */
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1536
1746
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1537
1747
if(ret == -1){
1538
perror("ioctl SIOCSIFFLAGS");
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1539
1749
}
1540
1750
}
1541
1751
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1598
1808
if(quit_now){
1599
1809
sigemptyset(&old_sigterm_action.sa_mask);
1600
1810
old_sigterm_action.sa_handler = SIG_DFL;
1601
ret = sigaction(signal_received, &old_sigterm_action, NULL);
1811
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1812
&old_sigterm_action,
1813
NULL));
1602
1814
if(ret == -1){
1603
1815
perror("sigaction");
1604
1816
}
1605
raise(signal_received);
1817
do {
1818
ret = raise(signal_received);
1819
} while(ret != 0 and errno == EINTR);
1820
if(ret != 0){
1821
perror("raise");
1822
abort();
1823
}
1824
TEMP_FAILURE_RETRY(pause());
1606
1825
}
1607
1826
1608
1827
return exitcode;
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0