43
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
47
srand(), strtof(), abort() */
48
48
#include <stdbool.h> /* bool, false, true */
49
49
#include <string.h> /* memset(), strcmp(), strlen(),
50
50
strerror(), asprintf(), strcpy() */
82
82
#include <signal.h> /* sigemptyset(), sigaddset(),
83
83
sigaction(), SIGTERM, sig_atomic_t,
85
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
86
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
89
87
#include <sys/klog.h> /* klogctl() */
630
617
if(if_index == AVAHI_IF_UNSPEC){
631
618
fprintf(stderr, "An IPv6 link-local address is incomplete"
632
619
" without a network interface\n");
636
622
/* Set the network interface number as scope */
865
829
(size_t)decrypted_buffer_size - written,
867
831
if(ret == 0 and ferror(stdout)){
870
833
fprintf(stderr, "Error writing encrypted data: %s\n",
871
834
strerror(errno));
876
838
written += (size_t)ret;
1047
1001
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1048
1002
/* read line from flags_fd */
1049
1003
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';
1004
char *flagstring = malloc((size_t)to_read);
1052
1005
if(flagstring == NULL){
1053
1006
perror("malloc");
1054
1007
close(flags_fd);
1076
1029
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1077
1030
and not (isspace(*tmp)))
1078
1031
or tmpmax != (ifreq_flags)tmpmax){
1080
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1081
flagstring, if_entry->d_name);
1083
1032
free(flagstring);
1087
1036
ifreq_flags flags = (ifreq_flags)tmpmax;
1088
1037
/* Reject the loopback device */
1089
1038
if(flags & IFF_LOOPBACK){
1091
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1096
1041
/* Accept point-to-point devices only if connect_to is specified */
1097
1042
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1099
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1104
1045
/* Otherwise, reject non-broadcast-capable devices */
1105
1046
if(not (flags & IFF_BROADCAST)){
1107
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1112
1049
/* Accept this device */
1114
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1198
1131
.arg = "SECONDS",
1199
1132
.doc = "Maximum delay to wait for interface startup",
1202
* These reproduce what we would get without ARGP_NO_HELP
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 },
1210
1134
{ .name = NULL }
1213
1137
error_t parse_opt(int key, char *arg,
1214
1138
struct argp_state *state){
1217
1140
case 128: /* --debug */
1234
1157
tmpmax = strtoimax(arg, &tmp, 10);
1235
1158
if(errno != 0 or tmp == arg or *tmp != '\0'
1236
1159
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1237
argp_error(state, "Bad number of DH bits");
1160
fprintf(stderr, "Bad number of DH bits\n");
1239
1163
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1246
1170
delay = strtof(arg, &tmp);
1247
1171
if(errno != 0 or tmp == arg or *tmp != '\0'){
1248
argp_error(state, "Bad delay");
1172
fprintf(stderr, "Bad delay\n");
1252
* These reproduce what we would get without ARGP_NO_HELP
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);
1266
1181
return ARGP_ERR_UNKNOWN;
1271
1186
struct argp argp = { .options = options, .parser = parse_opt,
1272
1187
.args_doc = "",
1273
1188
.doc = "Mandos client -- Get and decrypt"
1274
1189
" passwords from a Mandos server" };
1275
ret = argp_parse(&argp, argc, argv,
1276
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1283
perror("argp_parse");
1284
exitcode = EX_OSERR;
1287
exitcode = EX_USAGE;
1190
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1191
if(ret == ARGP_ERR_UNKNOWN){
1192
fprintf(stderr, "Unknown error while parsing arguments\n");
1193
exitcode = EXIT_FAILURE;
1325
1228
mc.simple_poll = avahi_simple_poll_new();
1326
1229
if(mc.simple_poll == NULL){
1327
1230
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1328
exitcode = EX_UNAVAILABLE;
1231
exitcode = EXIT_FAILURE;
1333
1236
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1335
1238
perror("sigaddset");
1336
exitcode = EX_OSERR;
1239
exitcode = EXIT_FAILURE;
1339
1242
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1341
1244
perror("sigaddset");
1342
exitcode = EX_OSERR;
1245
exitcode = EXIT_FAILURE;
1345
1248
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1347
1250
perror("sigaddset");
1348
exitcode = EX_OSERR;
1251
exitcode = EXIT_FAILURE;
1351
1254
/* Need to check if the handler is SIG_IGN before handling:
1355
1258
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1357
1260
perror("sigaction");
1261
return EXIT_FAILURE;
1360
1263
if(old_sigterm_action.sa_handler != SIG_IGN){
1361
1264
ret = sigaction(SIGINT, &sigterm_action, NULL);
1363
1266
perror("sigaction");
1364
exitcode = EX_OSERR;
1267
exitcode = EXIT_FAILURE;
1368
1271
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1370
1273
perror("sigaction");
1274
return EXIT_FAILURE;
1373
1276
if(old_sigterm_action.sa_handler != SIG_IGN){
1374
1277
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1376
1279
perror("sigaction");
1377
exitcode = EX_OSERR;
1280
exitcode = EXIT_FAILURE;
1381
1284
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1383
1286
perror("sigaction");
1287
return EXIT_FAILURE;
1386
1289
if(old_sigterm_action.sa_handler != SIG_IGN){
1387
1290
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1389
1292
perror("sigaction");
1390
exitcode = EX_OSERR;
1293
exitcode = EXIT_FAILURE;
1415
1318
#ifdef __linux__
1416
1319
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1417
messages about the network interface to mess up the prompt */
1320
messages to mess up the prompt */
1418
1321
ret = klogctl(8, NULL, 5);
1419
1322
bool restore_loglevel = true;
1470
1373
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1472
1375
take_down_interface = false;
1473
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1474
exitcode = EX_OSERR;
1376
perror("ioctl SIOCSIFFLAGS");
1377
exitcode = EXIT_FAILURE;
1475
1378
#ifdef __linux__
1476
1379
if(restore_loglevel){
1477
1380
ret = klogctl(7, NULL, 0);
1543
1446
ret = init_gnutls_global(pubkey, seckey);
1545
1448
fprintf(stderr, "init_gnutls_global failed\n");
1546
exitcode = EX_UNAVAILABLE;
1449
exitcode = EXIT_FAILURE;
1549
1452
gnutls_initialized = true;
1567
1470
if(not init_gpgme(pubkey, seckey, tempdir)){
1568
1471
fprintf(stderr, "init_gpgme failed\n");
1569
exitcode = EX_UNAVAILABLE;
1472
exitcode = EXIT_FAILURE;
1572
1475
gpgme_initialized = true;
1743
1628
perror("ioctl SIOCGIFFLAGS");
1744
1629
} else if(network.ifr_flags & IFF_UP) {
1745
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1630
network.ifr_flags &= ~IFF_UP; /* clear flag */
1746
1631
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1748
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1633
perror("ioctl SIOCSIFFLAGS");
1751
1636
ret = (int)TEMP_FAILURE_RETRY(close(sd));