353
273
ssize_t plaintext_length = 0;
356
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
276
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
359
279
/* Create new GPGME data buffer from memory cryptotext */
360
280
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
362
282
if(rc != GPG_ERR_NO_ERROR){
363
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
283
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
284
gpgme_strsource(rc), gpgme_strerror(rc));
368
288
/* Create new empty GPGME data buffer for the plaintext */
369
289
rc = gpgme_data_new(&dh_plain);
370
290
if(rc != GPG_ERR_NO_ERROR){
371
fprintf_plus(stderr, "Mandos plugin mandos-client: "
372
"bad gpgme_data_new: %s: %s\n",
373
gpgme_strsource(rc), gpgme_strerror(rc));
291
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
292
gpgme_strsource(rc), gpgme_strerror(rc));
374
293
gpgme_data_release(dh_crypto);
378
297
/* Decrypt data from the cryptotext data buffer to the plaintext
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
299
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
381
300
if(rc != GPG_ERR_NO_ERROR){
382
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
384
303
plaintext_length = -1;
386
305
gpgme_decrypt_result_t result;
387
result = gpgme_op_decrypt_result(mc->ctx);
306
result = gpgme_op_decrypt_result(mc.ctx);
388
307
if(result == NULL){
389
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
308
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
391
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
392
result->unsupported_algorithm);
393
fprintf_plus(stderr, "Wrong key usage: %u\n",
394
result->wrong_key_usage);
310
fprintf(stderr, "Unsupported algorithm: %s\n",
311
result->unsupported_algorithm);
312
fprintf(stderr, "Wrong key usage: %u\n",
313
result->wrong_key_usage);
395
314
if(result->file_name != NULL){
396
fprintf_plus(stderr, "File name: %s\n", result->file_name);
315
fprintf(stderr, "File name: %s\n", result->file_name);
398
317
gpgme_recipient_t recipient;
399
318
recipient = result->recipients;
400
319
while(recipient != NULL){
401
fprintf_plus(stderr, "Public key algorithm: %s\n",
402
gpgme_pubkey_algo_name
403
(recipient->pubkey_algo));
404
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
405
fprintf_plus(stderr, "Secret key available: %s\n",
406
recipient->status == GPG_ERR_NO_SECKEY
320
fprintf(stderr, "Public key algorithm: %s\n",
321
gpgme_pubkey_algo_name(recipient->pubkey_algo));
322
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
323
fprintf(stderr, "Secret key available: %s\n",
324
recipient->status == GPG_ERR_NO_SECKEY
408
326
recipient = recipient->next;
507
425
/* OpenPGP credentials */
508
ret = gnutls_certificate_allocate_credentials(&mc->cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
509
427
if(ret != GNUTLS_E_SUCCESS){
510
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
511
safer_gnutls_strerror(ret));
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
432
safer_gnutls_strerror(ret));
512
433
gnutls_global_deinit();
517
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
518
" secret key %s as GnuTLS credentials\n",
438
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
439
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
523
443
ret = gnutls_certificate_set_openpgp_key_file
524
(mc->cred, pubkeyfilename, seckeyfilename,
444
(mc.cred, pubkeyfilename, seckeyfilename,
525
445
GNUTLS_OPENPGP_FMT_BASE64);
526
446
if(ret != GNUTLS_E_SUCCESS){
528
"Error[%d] while reading the OpenPGP key pair ('%s',"
529
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
530
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
531
safer_gnutls_strerror(ret));
448
"Error[%d] while reading the OpenPGP key pair ('%s',"
449
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
450
fprintf(stderr, "The GnuTLS error is: %s\n",
451
safer_gnutls_strerror(ret));
535
455
/* GnuTLS server initialization */
536
ret = gnutls_dh_params_init(&mc->dh_params);
456
ret = gnutls_dh_params_init(&mc.dh_params);
537
457
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
" initialization: %s\n",
540
safer_gnutls_strerror(ret));
458
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
459
" %s\n", safer_gnutls_strerror(ret));
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
462
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
544
463
if(ret != GNUTLS_E_SUCCESS){
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
safer_gnutls_strerror(ret));
464
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
465
safer_gnutls_strerror(ret));
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
469
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
556
gnutls_certificate_free_credentials(mc->cred);
475
gnutls_certificate_free_credentials(mc.cred);
557
476
gnutls_global_deinit();
558
gnutls_dh_params_deinit(mc->dh_params);
477
gnutls_dh_params_deinit(mc.dh_params);
562
static int init_gnutls_session(gnutls_session_t *session,
481
static int init_gnutls_session(gnutls_session_t *session){
565
483
/* GnuTLS session creation */
1155
1019
signal_received = sig;
1156
1020
int old_errno = errno;
1157
/* set main loop to exit */
1158
if(simple_poll != NULL){
1159
avahi_simple_poll_quit(simple_poll);
1021
if(mc.simple_poll != NULL){
1022
avahi_simple_poll_quit(mc.simple_poll);
1161
1024
errno = old_errno;
1164
bool get_flags(const char *ifname, struct ifreq *ifr){
1168
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1171
perror_plus("socket");
1175
strcpy(ifr->ifr_name, ifname);
1176
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1180
perror_plus("ioctl SIOCGIFFLAGS");
1188
bool good_flags(const char *ifname, const struct ifreq *ifr){
1190
/* Reject the loopback device */
1191
if(ifr->ifr_flags & IFF_LOOPBACK){
1193
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1198
/* Accept point-to-point devices only if connect_to is specified */
1199
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1201
fprintf_plus(stderr, "Accepting point-to-point interface"
1202
" \"%s\"\n", ifname);
1206
/* Otherwise, reject non-broadcast-capable devices */
1207
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1209
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1210
" \"%s\"\n", ifname);
1214
/* Reject non-ARP interfaces (including dummy interfaces) */
1215
if(ifr->ifr_flags & IFF_NOARP){
1217
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1223
/* Accept this device */
1225
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1231
1028
* This function determines if a directory entry in /sys/class/net
1232
1029
* corresponds to an acceptable network device.
1233
1030
* (This function is passed to scandir(3) as a filter function.)
1235
1032
int good_interface(const struct dirent *if_entry){
1034
char *flagname = NULL;
1236
1035
if(if_entry->d_name[0] == '.'){
1241
if(not get_flags(if_entry->d_name, &ifr)){
1243
fprintf_plus(stderr, "Failed to get flags for interface "
1244
"\"%s\"\n", if_entry->d_name);
1249
if(not good_flags(if_entry->d_name, &ifr)){
1256
* This function determines if a network interface is up.
1258
bool interface_is_up(const char *interface){
1260
if(not get_flags(interface, &ifr)){
1262
fprintf_plus(stderr, "Failed to get flags for interface "
1263
"\"%s\"\n", interface);
1268
return (bool)(ifr.ifr_flags & IFF_UP);
1272
* This function determines if a network interface is running
1274
bool interface_is_running(const char *interface){
1276
if(not get_flags(interface, &ifr)){
1278
fprintf_plus(stderr, "Failed to get flags for interface "
1279
"\"%s\"\n", interface);
1284
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1287
int notdotentries(const struct dirent *direntry){
1288
/* Skip "." and ".." */
1289
if(direntry->d_name[0] == '.'
1290
and (direntry->d_name[1] == '\0'
1291
or (direntry->d_name[1] == '.'
1292
and direntry->d_name[2] == '\0'))){
1298
/* Is this directory entry a runnable program? */
1299
int runnable_hook(const struct dirent *direntry){
1304
if((direntry->d_name)[0] == '\0'){
1309
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1310
"abcdefghijklmnopqrstuvwxyz"
1313
if((direntry->d_name)[sret] != '\0'){
1314
/* Contains non-allowed characters */
1316
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1322
char *fullname = NULL;
1323
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1038
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1325
perror_plus("asprintf");
1329
ret = stat(fullname, &st);
1332
perror_plus("Could not stat hook");
1336
if(not (S_ISREG(st.st_mode))){
1337
/* Not a regular file */
1339
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1344
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1345
/* Not executable */
1347
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1051
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1052
/* read line from flags_fd */
1053
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1054
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1055
flagstring[(size_t)to_read] = '\0';
1056
if(flagstring == NULL){
1062
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1079
tmpmax = strtoimax(flagstring, &tmp, 0);
1080
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1081
and not (isspace(*tmp)))
1082
or tmpmax != (ifreq_flags)tmpmax){
1084
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1085
flagstring, if_entry->d_name);
1091
ifreq_flags flags = (ifreq_flags)tmpmax;
1092
/* Reject the loopback device */
1093
if(flags & IFF_LOOPBACK){
1095
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1100
/* Accept point-to-point devices only if connect_to is specified */
1101
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1103
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1108
/* Otherwise, reject non-broadcast-capable devices */
1109
if(not (flags & IFF_BROADCAST)){
1111
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1116
/* Accept this device */
1353
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1118
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1359
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1360
mandos_context *mc){
1362
struct timespec now;
1363
struct timespec waited_time;
1364
intmax_t block_time;
1367
if(mc->current_server == NULL){
1369
fprintf_plus(stderr, "Wait until first server is found."
1372
ret = avahi_simple_poll_iterate(s, -1);
1375
fprintf_plus(stderr, "Check current_server if we should run"
1378
/* the current time */
1379
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1381
perror_plus("clock_gettime");
1384
/* Calculating in ms how long time between now and server
1385
who we visted longest time ago. Now - last seen. */
1386
waited_time.tv_sec = (now.tv_sec
1387
- mc->current_server->last_seen.tv_sec);
1388
waited_time.tv_nsec = (now.tv_nsec
1389
- mc->current_server->last_seen.tv_nsec);
1390
/* total time is 10s/10,000ms.
1391
Converting to s from ms by dividing by 1,000,
1392
and ns to ms by dividing by 1,000,000. */
1393
block_time = ((retry_interval
1394
- ((intmax_t)waited_time.tv_sec * 1000))
1395
- ((intmax_t)waited_time.tv_nsec / 1000000));
1398
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1402
if(block_time <= 0){
1403
ret = start_mandos_communication(mc->current_server->ip,
1404
mc->current_server->port,
1405
mc->current_server->if_index,
1406
mc->current_server->af, mc);
1408
avahi_simple_poll_quit(s);
1411
ret = clock_gettime(CLOCK_MONOTONIC,
1412
&mc->current_server->last_seen);
1414
perror_plus("clock_gettime");
1417
mc->current_server = mc->current_server->next;
1418
block_time = 0; /* Call avahi to find new Mandos
1419
servers, but don't block */
1422
ret = avahi_simple_poll_iterate(s, (int)block_time);
1425
if (ret > 0 or errno != EINTR){
1426
return (ret != 1) ? ret : 0;
1432
/* Set effective uid to 0, return errno */
1433
error_t raise_privileges(void){
1434
error_t old_errno = errno;
1435
error_t ret_errno = 0;
1436
if(seteuid(0) == -1){
1438
perror_plus("seteuid");
1444
/* Set effective and real user ID to 0. Return errno. */
1445
error_t raise_privileges_permanently(void){
1446
error_t old_errno = errno;
1447
error_t ret_errno = raise_privileges();
1452
if(setuid(0) == -1){
1454
perror_plus("seteuid");
1460
/* Set effective user ID to unprivileged saved user ID */
1461
error_t lower_privileges(void){
1462
error_t old_errno = errno;
1463
error_t ret_errno = 0;
1464
if(seteuid(uid) == -1){
1466
perror_plus("seteuid");
1472
/* Lower privileges permanently */
1473
error_t lower_privileges_permanently(void){
1474
error_t old_errno = errno;
1475
error_t ret_errno = 0;
1476
if(setuid(uid) == -1){
1478
perror_plus("setuid");
1484
bool run_network_hooks(const char *mode, const char *interface,
1486
struct dirent **direntries;
1487
struct dirent *direntry;
1489
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1492
if(errno == ENOENT){
1494
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1495
" found\n", hookdir);
1498
perror_plus("scandir");
1501
int devnull = open("/dev/null", O_RDONLY);
1502
for(int i = 0; i < numhooks; i++){
1503
direntry = direntries[i];
1504
char *fullname = NULL;
1505
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1507
perror_plus("asprintf");
1511
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1514
pid_t hook_pid = fork();
1517
/* Raise privileges */
1518
raise_privileges_permanently();
1523
perror_plus("setgid");
1525
/* Reset supplementary groups */
1527
ret = setgroups(0, NULL);
1529
perror_plus("setgroups");
1531
dup2(devnull, STDIN_FILENO);
1533
dup2(STDERR_FILENO, STDOUT_FILENO);
1534
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1536
perror_plus("setenv");
1539
ret = setenv("DEVICE", interface, 1);
1541
perror_plus("setenv");
1544
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1546
perror_plus("setenv");
1549
ret = setenv("MODE", mode, 1);
1551
perror_plus("setenv");
1555
ret = asprintf(&delaystring, "%f", delay);
1557
perror_plus("asprintf");
1560
ret = setenv("DELAY", delaystring, 1);
1563
perror_plus("setenv");
1567
if(connect_to != NULL){
1568
ret = setenv("CONNECT", connect_to, 1);
1570
perror_plus("setenv");
1574
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1575
perror_plus("execl");
1576
_exit(EXIT_FAILURE);
1580
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1581
perror_plus("waitpid");
1585
if(WIFEXITED(status)){
1586
if(WEXITSTATUS(status) != 0){
1587
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1588
" with status %d\n", direntry->d_name,
1589
WEXITSTATUS(status));
1593
} else if(WIFSIGNALED(status)){
1594
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1595
" signal %d\n", direntry->d_name,
1600
fprintf_plus(stderr, "Warning: network hook \"%s\""
1601
" crashed\n", direntry->d_name);
1608
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1617
error_t bring_up_interface(const char *const interface,
1620
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1623
struct ifreq network;
1624
unsigned int if_index = if_nametoindex(interface);
1626
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1636
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
1639
fprintf_plus(stderr, "Failed to get flags for interface "
1640
"\"%s\"\n", interface);
1643
network.ifr_flags |= IFF_UP;
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1648
perror_plus("socket");
1660
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1664
/* Raise priviliges */
1668
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1669
messages about the network interface to mess up the prompt */
1670
int ret_linux = klogctl(8, NULL, 5);
1671
bool restore_loglevel = true;
1672
if(ret_linux == -1){
1673
restore_loglevel = false;
1674
perror_plus("klogctl");
1676
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1680
if(restore_loglevel){
1681
ret_linux = klogctl(7, NULL, 0);
1682
if(ret_linux == -1){
1683
perror_plus("klogctl");
1686
#endif /* __linux__ */
1688
/* Lower privileges */
1691
/* Close the socket */
1692
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1694
perror_plus("close");
1697
if(ret_setflags == -1){
1699
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1704
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1708
/* Sleep checking until interface is running.
1709
Check every 0.25s, up to total time of delay */
1710
for(int i=0; i < delay * 4; i++){
1711
if(interface_is_running(interface)){
1714
struct timespec sleeptime = { .tv_nsec = 250000000 };
1715
ret = nanosleep(&sleeptime, NULL);
1716
if(ret == -1 and errno != EINTR){
1717
perror_plus("nanosleep");
1725
error_t take_down_interface(const char *const interface){
1727
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1730
struct ifreq network;
1731
unsigned int if_index = if_nametoindex(interface);
1733
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1737
if(interface_is_up(interface)){
1738
if(not get_flags(interface, &network) and debug){
1740
fprintf_plus(stderr, "Failed to get flags for interface "
1741
"\"%s\"\n", interface);
1744
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1749
perror_plus("socket");
1755
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1759
/* Raise priviliges */
1762
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1765
/* Lower privileges */
1768
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1771
perror_plus("close");
1774
if(ret_setflags == -1){
1776
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1781
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1789
1124
int main(int argc, char *argv[]){
1790
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1793
.interfaces = NULL, .interfaces_size = 0 };
1794
1125
AvahiSServiceBrowser *sb = NULL;
1797
1128
intmax_t tmpmax;
1799
1130
int exitcode = EXIT_SUCCESS;
1800
char *interfaces_to_take_down = NULL;
1801
size_t interfaces_to_take_down_size = 0;
1131
const char *interface = "";
1132
struct ifreq network;
1134
bool take_down_interface = false;
1802
1137
char tempdir[] = "/tmp/mandosXXXXXX";
1803
1138
bool tempdir_created = false;
1804
1139
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1805
1140
const char *seckey = PATHDIR "/" SECKEY;
1806
1141
const char *pubkey = PATHDIR "/" PUBKEY;
1807
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1810
1143
bool gnutls_initialized = false;
1811
1144
bool gpgme_initialized = false;
1812
1145
float delay = 2.5f;
1813
double retry_interval = 10; /* 10s between trying a server and
1814
retrying the same server again */
1816
1147
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1817
1148
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1989
/* Work around Debian bug #633582:
1990
<http://bugs.debian.org/633582> */
1992
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
1996
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1997
int seckey_fd = open(seckey, O_RDONLY);
1998
if(seckey_fd == -1){
1999
perror_plus("open");
2001
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2003
perror_plus("fstat");
2005
if(S_ISREG(st.st_mode)
2006
and st.st_uid == 0 and st.st_gid == 0){
2007
ret = fchown(seckey_fd, uid, gid);
2009
perror_plus("fchown");
2013
TEMP_FAILURE_RETRY(close(seckey_fd));
2017
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2018
int pubkey_fd = open(pubkey, O_RDONLY);
2019
if(pubkey_fd == -1){
2020
perror_plus("open");
2022
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2024
perror_plus("fstat");
2026
if(S_ISREG(st.st_mode)
2027
and st.st_uid == 0 and st.st_gid == 0){
2028
ret = fchown(pubkey_fd, uid, gid);
2030
perror_plus("fchown");
2034
TEMP_FAILURE_RETRY(close(pubkey_fd));
2038
/* Lower privileges */
2043
/* Remove invalid interface names (except "none") */
2045
char *interface = NULL;
2046
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2048
if(strcmp(interface, "none") != 0
2049
and if_nametoindex(interface) == 0){
2050
if(interface[0] != '\0'){
2051
fprintf_plus(stderr, "Not using nonexisting interface"
2052
" \"%s\"\n", interface);
2054
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2060
/* Run network hooks */
2062
if(mc.interfaces != NULL){
2063
interfaces_hooks = malloc(mc.interfaces_size);
2064
if(interfaces_hooks == NULL){
2065
perror_plus("malloc");
2068
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2069
interfaces_hooks_size = mc.interfaces_size;
2070
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2073
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2074
interfaces_hooks : "", delay)){
2080
1297
avahi_set_log_function(empty_log);
1300
if(interface[0] == '\0'){
1301
struct dirent **direntries;
1302
ret = scandir(sys_class_net, &direntries, good_interface,
1305
/* Pick the first good interface */
1306
interface = strdup(direntries[0]->d_name);
1308
fprintf(stderr, "Using interface \"%s\"\n", interface);
1310
if(interface == NULL){
1313
exitcode = EXIT_FAILURE;
1319
fprintf(stderr, "Could not find a network interface\n");
1320
exitcode = EXIT_FAILURE;
2083
1325
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2084
1326
from the signal handler */
2085
1327
/* Initialize the pseudo-RNG for Avahi */
2086
1328
srand((unsigned int) time(NULL));
2087
simple_poll = avahi_simple_poll_new();
2088
if(simple_poll == NULL){
2089
fprintf_plus(stderr,
2090
"Avahi: Failed to create simple poll object.\n");
1329
mc.simple_poll = avahi_simple_poll_new();
1330
if(mc.simple_poll == NULL){
1331
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2091
1332
exitcode = EX_UNAVAILABLE;
2118
1359
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2120
perror_plus("sigaction");
1361
perror("sigaction");
2121
1362
return EX_OSERR;
2123
1364
if(old_sigterm_action.sa_handler != SIG_IGN){
2124
1365
ret = sigaction(SIGINT, &sigterm_action, NULL);
2126
perror_plus("sigaction");
1367
perror("sigaction");
2127
1368
exitcode = EX_OSERR;
2131
1372
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2133
perror_plus("sigaction");
1374
perror("sigaction");
2134
1375
return EX_OSERR;
2136
1377
if(old_sigterm_action.sa_handler != SIG_IGN){
2137
1378
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2139
perror_plus("sigaction");
1380
perror("sigaction");
2140
1381
exitcode = EX_OSERR;
2144
1385
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2146
perror_plus("sigaction");
1387
perror("sigaction");
2147
1388
return EX_OSERR;
2149
1390
if(old_sigterm_action.sa_handler != SIG_IGN){
2150
1391
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2152
perror_plus("sigaction");
2153
exitcode = EX_OSERR;
2158
/* If no interfaces were specified, make a list */
2159
if(mc.interfaces == NULL){
2160
struct dirent **direntries;
2161
/* Look for any good interfaces */
2162
ret = scandir(sys_class_net, &direntries, good_interface,
2165
/* Add all found interfaces to interfaces list */
2166
for(int i = 0; i < ret; ++i){
2167
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
direntries[i]->d_name);
2170
perror_plus("argz_add");
2174
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2175
direntries[i]->d_name);
2181
fprintf_plus(stderr, "Could not find a network interface\n");
2182
exitcode = EXIT_FAILURE;
2187
/* Bring up interfaces which are down, and remove any "none"s */
2189
char *interface = NULL;
2190
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2192
/* If interface name is "none", stop bringing up interfaces.
2193
Also remove all instances of "none" from the list */
2194
if(strcmp(interface, "none") == 0){
2195
argz_delete(&mc.interfaces, &mc.interfaces_size,
2198
while((interface = argz_next(mc.interfaces,
2199
mc.interfaces_size, interface))){
2200
if(strcmp(interface, "none") == 0){
2201
argz_delete(&mc.interfaces, &mc.interfaces_size,
1393
perror("sigaction");
1394
exitcode = EX_OSERR;
1399
/* If the interface is down, bring it up */
1400
if(strcmp(interface, "none") != 0){
1401
if_index = (AvahiIfIndex) if_nametoindex(interface);
1403
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1404
exitcode = EX_UNAVAILABLE;
1412
/* Re-raise priviliges */
1420
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1421
messages about the network interface to mess up the prompt */
1422
ret = klogctl(8, NULL, 5);
1423
bool restore_loglevel = true;
1425
restore_loglevel = false;
1428
#endif /* __linux__ */
1430
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1433
exitcode = EX_OSERR;
1435
if(restore_loglevel){
1436
ret = klogctl(7, NULL, 0);
1441
#endif /* __linux__ */
1442
/* Lower privileges */
1450
strcpy(network.ifr_name, interface);
1451
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1453
perror("ioctl SIOCGIFFLAGS");
1455
if(restore_loglevel){
1456
ret = klogctl(7, NULL, 0);
1461
#endif /* __linux__ */
1462
exitcode = EX_OSERR;
1463
/* Lower privileges */
1471
if((network.ifr_flags & IFF_UP) == 0){
1472
network.ifr_flags |= IFF_UP;
1473
take_down_interface = true;
1474
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1476
take_down_interface = false;
1477
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1478
exitcode = EX_OSERR;
1480
if(restore_loglevel){
1481
ret = klogctl(7, NULL, 0);
1486
#endif /* __linux__ */
1487
/* Lower privileges */
1496
/* sleep checking until interface is running */
1497
for(int i=0; i < delay * 4; i++){
1498
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1500
perror("ioctl SIOCGIFFLAGS");
1501
} else if(network.ifr_flags & IFF_RUNNING){
2208
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
2210
if(not interface_was_up){
2213
perror_plus("Failed to bring up interface");
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2221
if(debug and (interfaces_to_take_down == NULL)){
2222
fprintf_plus(stderr, "No interfaces were brought up\n");
2226
/* If we only got one interface, explicitly use only that one */
2227
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2229
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2232
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1504
struct timespec sleeptime = { .tv_nsec = 250000000 };
1505
ret = nanosleep(&sleeptime, NULL);
1506
if(ret == -1 and errno != EINTR){
1507
perror("nanosleep");
1510
if(not take_down_interface){
1511
/* We won't need the socket anymore */
1512
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1518
if(restore_loglevel){
1519
/* Restores kernel loglevel to default */
1520
ret = klogctl(7, NULL, 0);
1525
#endif /* __linux__ */
1526
/* Lower privileges */
1528
if(take_down_interface){
1529
/* Lower privileges */
1535
/* Lower privileges permanently */
2239
ret = init_gnutls_global(pubkey, seckey, &mc);
1547
ret = init_gnutls_global(pubkey, seckey);
2241
fprintf_plus(stderr, "init_gnutls_global failed\n");
1549
fprintf(stderr, "init_gnutls_global failed\n");
2242
1550
exitcode = EX_UNAVAILABLE;