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 */
1152
1019
signal_received = sig;
1153
1020
int old_errno = errno;
1154
/* set main loop to exit */
1155
if(simple_poll != NULL){
1156
avahi_simple_poll_quit(simple_poll);
1021
if(mc.simple_poll != NULL){
1022
avahi_simple_poll_quit(mc.simple_poll);
1158
1024
errno = old_errno;
1161
bool get_flags(const char *ifname, struct ifreq *ifr){
1165
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1168
perror_plus("socket");
1172
strcpy(ifr->ifr_name, ifname);
1173
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1177
perror_plus("ioctl SIOCGIFFLAGS");
1185
bool good_flags(const char *ifname, const struct ifreq *ifr){
1187
/* Reject the loopback device */
1188
if(ifr->ifr_flags & IFF_LOOPBACK){
1190
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1195
/* Accept point-to-point devices only if connect_to is specified */
1196
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1198
fprintf_plus(stderr, "Accepting point-to-point interface"
1199
" \"%s\"\n", ifname);
1203
/* Otherwise, reject non-broadcast-capable devices */
1204
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1206
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1207
" \"%s\"\n", ifname);
1211
/* Reject non-ARP interfaces (including dummy interfaces) */
1212
if(ifr->ifr_flags & IFF_NOARP){
1214
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1220
/* Accept this device */
1222
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1228
1028
* This function determines if a directory entry in /sys/class/net
1229
1029
* corresponds to an acceptable network device.
1230
1030
* (This function is passed to scandir(3) as a filter function.)
1232
1032
int good_interface(const struct dirent *if_entry){
1034
char *flagname = NULL;
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1233
1041
if(if_entry->d_name[0] == '.'){
1238
if(not get_flags(if_entry->d_name, &ifr)){
1240
fprintf_plus(stderr, "Failed to get flags for interface "
1241
"\"%s\"\n", if_entry->d_name);
1246
if(not good_flags(if_entry->d_name, &ifr)){
1253
* This function determines if a network interface is up.
1255
bool interface_is_up(const char *interface){
1257
if(not get_flags(interface, &ifr)){
1259
fprintf_plus(stderr, "Failed to get flags for interface "
1260
"\"%s\"\n", interface);
1265
return (bool)(ifr.ifr_flags & IFF_UP);
1269
* This function determines if a network interface is running
1271
bool interface_is_running(const char *interface){
1273
if(not get_flags(interface, &ifr)){
1275
fprintf_plus(stderr, "Failed to get flags for interface "
1276
"\"%s\"\n", interface);
1281
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1284
int notdotentries(const struct dirent *direntry){
1285
/* Skip "." and ".." */
1286
if(direntry->d_name[0] == '.'
1287
and (direntry->d_name[1] == '\0'
1288
or (direntry->d_name[1] == '.'
1289
and direntry->d_name[2] == '\0'))){
1295
/* Is this directory entry a runnable program? */
1296
int runnable_hook(const struct dirent *direntry){
1301
if((direntry->d_name)[0] == '\0'){
1306
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1307
"abcdefghijklmnopqrstuvwxyz"
1310
if((direntry->d_name)[sret] != '\0'){
1311
/* Contains non-allowed characters */
1313
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1322
perror_plus("asprintf");
1326
ret = stat(fullname, &st);
1329
perror_plus("Could not stat hook");
1333
if(not (S_ISREG(st.st_mode))){
1334
/* Not a regular file */
1336
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1341
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1342
/* Not executable */
1344
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
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){
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
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){
1082
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1083
flagstring, if_entry->d_name);
1089
ifreq_flags flags = (ifreq_flags)tmpmax;
1090
/* Reject the loopback device */
1091
if(flags & IFF_LOOPBACK){
1093
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1098
/* Accept point-to-point devices only if connect_to is specified */
1099
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1101
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1106
/* Otherwise, reject non-broadcast-capable devices */
1107
if(not (flags & IFF_BROADCAST)){
1109
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1114
/* Accept this device */
1350
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1356
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1357
mandos_context *mc){
1359
struct timespec now;
1360
struct timespec waited_time;
1361
intmax_t block_time;
1364
if(mc->current_server == NULL){
1366
fprintf_plus(stderr, "Wait until first server is found."
1369
ret = avahi_simple_poll_iterate(s, -1);
1372
fprintf_plus(stderr, "Check current_server if we should run"
1375
/* the current time */
1376
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1378
perror_plus("clock_gettime");
1381
/* Calculating in ms how long time between now and server
1382
who we visted longest time ago. Now - last seen. */
1383
waited_time.tv_sec = (now.tv_sec
1384
- mc->current_server->last_seen.tv_sec);
1385
waited_time.tv_nsec = (now.tv_nsec
1386
- mc->current_server->last_seen.tv_nsec);
1387
/* total time is 10s/10,000ms.
1388
Converting to s from ms by dividing by 1,000,
1389
and ns to ms by dividing by 1,000,000. */
1390
block_time = ((retry_interval
1391
- ((intmax_t)waited_time.tv_sec * 1000))
1392
- ((intmax_t)waited_time.tv_nsec / 1000000));
1395
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1399
if(block_time <= 0){
1400
ret = start_mandos_communication(mc->current_server->ip,
1401
mc->current_server->port,
1402
mc->current_server->if_index,
1403
mc->current_server->af, mc);
1405
avahi_simple_poll_quit(s);
1408
ret = clock_gettime(CLOCK_MONOTONIC,
1409
&mc->current_server->last_seen);
1411
perror_plus("clock_gettime");
1414
mc->current_server = mc->current_server->next;
1415
block_time = 0; /* Call avahi to find new Mandos
1416
servers, but don't block */
1419
ret = avahi_simple_poll_iterate(s, (int)block_time);
1422
if (ret > 0 or errno != EINTR){
1423
return (ret != 1) ? ret : 0;
1429
/* Set effective uid to 0, return errno */
1430
error_t raise_privileges(void){
1431
error_t old_errno = errno;
1432
error_t ret_errno = 0;
1433
if(seteuid(0) == -1){
1435
perror_plus("seteuid");
1441
/* Set effective and real user ID to 0. Return errno. */
1442
error_t raise_privileges_permanently(void){
1443
error_t old_errno = errno;
1444
error_t ret_errno = raise_privileges();
1449
if(setuid(0) == -1){
1451
perror_plus("seteuid");
1457
/* Set effective user ID to unprivileged saved user ID */
1458
error_t lower_privileges(void){
1459
error_t old_errno = errno;
1460
error_t ret_errno = 0;
1461
if(seteuid(uid) == -1){
1463
perror_plus("seteuid");
1469
/* Lower privileges permanently */
1470
error_t lower_privileges_permanently(void){
1471
error_t old_errno = errno;
1472
error_t ret_errno = 0;
1473
if(setuid(uid) == -1){
1475
perror_plus("setuid");
1481
bool run_network_hooks(const char *mode, const char *interface,
1483
struct dirent **direntries;
1484
struct dirent *direntry;
1486
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1489
if(errno == ENOENT){
1491
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1492
" found\n", hookdir);
1495
perror_plus("scandir");
1498
int devnull = open("/dev/null", O_RDONLY);
1499
for(int i = 0; i < numhooks; i++){
1500
direntry = direntries[i];
1501
char *fullname = NULL;
1502
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1504
perror_plus("asprintf");
1508
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1511
pid_t hook_pid = fork();
1514
/* Raise privileges */
1515
raise_privileges_permanently();
1520
perror_plus("setgid");
1522
/* Reset supplementary groups */
1524
ret = setgroups(0, NULL);
1526
perror_plus("setgroups");
1528
dup2(devnull, STDIN_FILENO);
1530
dup2(STDERR_FILENO, STDOUT_FILENO);
1531
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1533
perror_plus("setenv");
1536
ret = setenv("DEVICE", interface, 1);
1538
perror_plus("setenv");
1541
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1543
perror_plus("setenv");
1546
ret = setenv("MODE", mode, 1);
1548
perror_plus("setenv");
1552
ret = asprintf(&delaystring, "%f", delay);
1554
perror_plus("asprintf");
1557
ret = setenv("DELAY", delaystring, 1);
1560
perror_plus("setenv");
1564
if(connect_to != NULL){
1565
ret = setenv("CONNECT", connect_to, 1);
1567
perror_plus("setenv");
1571
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1572
perror_plus("execl");
1573
_exit(EXIT_FAILURE);
1577
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1578
perror_plus("waitpid");
1582
if(WIFEXITED(status)){
1583
if(WEXITSTATUS(status) != 0){
1584
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1585
" with status %d\n", direntry->d_name,
1586
WEXITSTATUS(status));
1590
} else if(WIFSIGNALED(status)){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1592
" signal %d\n", direntry->d_name,
1597
fprintf_plus(stderr, "Warning: network hook \"%s\""
1598
" crashed\n", direntry->d_name);
1605
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1614
error_t bring_up_interface(const char *const interface,
1617
error_t old_errno = errno;
1618
error_t ret_errno = 0;
1619
int ret, ret_setflags;
1620
struct ifreq network;
1621
unsigned int if_index = if_nametoindex(interface);
1623
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1633
if(not interface_is_up(interface)){
1634
if(not get_flags(interface, &network) and debug){
1636
fprintf_plus(stderr, "Failed to get flags for interface "
1637
"\"%s\"\n", interface);
1640
network.ifr_flags |= IFF_UP;
1642
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1645
perror_plus("socket");
1657
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1661
/* Raise priviliges */
1665
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1666
messages about the network interface to mess up the prompt */
1667
int ret_linux = klogctl(8, NULL, 5);
1668
bool restore_loglevel = true;
1669
if(ret_linux == -1){
1670
restore_loglevel = false;
1671
perror_plus("klogctl");
1673
#endif /* __linux__ */
1674
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1677
if(restore_loglevel){
1678
ret_linux = klogctl(7, NULL, 0);
1679
if(ret_linux == -1){
1680
perror_plus("klogctl");
1683
#endif /* __linux__ */
1685
/* Lower privileges */
1688
/* Close the socket */
1689
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1691
perror_plus("close");
1694
if(ret_setflags == -1){
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1701
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1705
/* Sleep checking until interface is running.
1706
Check every 0.25s, up to total time of delay */
1707
for(int i=0; i < delay * 4; i++){
1708
if(interface_is_running(interface)){
1711
struct timespec sleeptime = { .tv_nsec = 250000000 };
1712
ret = nanosleep(&sleeptime, NULL);
1713
if(ret == -1 and errno != EINTR){
1714
perror_plus("nanosleep");
1722
error_t take_down_interface(const char *const interface){
1724
error_t old_errno = errno;
1725
error_t ret_errno = 0;
1726
int ret, ret_setflags;
1727
struct ifreq network;
1728
unsigned int if_index = if_nametoindex(interface);
1730
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1734
if(interface_is_up(interface)){
1735
if(not get_flags(interface, &network) and debug){
1737
fprintf_plus(stderr, "Failed to get flags for interface "
1738
"\"%s\"\n", interface);
1741
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1743
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1746
perror_plus("socket");
1752
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1756
/* Raise priviliges */
1759
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1762
/* Lower privileges */
1765
/* Close the socket */
1766
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1768
perror_plus("close");
1771
if(ret_setflags == -1){
1773
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1778
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1786
1122
int main(int argc, char *argv[]){
1787
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1788
.priority = "SECURE256:!CTYPE-X.509:"
1789
"+CTYPE-OPENPGP", .current_server = NULL,
1790
.interfaces = NULL, .interfaces_size = 0 };
1791
1123
AvahiSServiceBrowser *sb = NULL;
1794
1126
intmax_t tmpmax;
1796
1128
int exitcode = EXIT_SUCCESS;
1797
char *interfaces_to_take_down = NULL;
1798
size_t interfaces_to_take_down_size = 0;
1129
const char *interface = "";
1130
struct ifreq network;
1132
bool take_down_interface = false;
1799
1135
char tempdir[] = "/tmp/mandosXXXXXX";
1800
1136
bool tempdir_created = false;
1801
1137
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1802
1138
const char *seckey = PATHDIR "/" SECKEY;
1803
1139
const char *pubkey = PATHDIR "/" PUBKEY;
1804
char *interfaces_hooks = NULL;
1805
size_t interfaces_hooks_size = 0;
1807
1141
bool gnutls_initialized = false;
1808
1142
bool gpgme_initialized = false;
1809
1143
float delay = 2.5f;
1810
double retry_interval = 10; /* 10s between trying a server and
1811
retrying the same server again */
1813
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1814
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1986
/* Work around Debian bug #633582:
1987
<http://bugs.debian.org/633582> */
1989
/* Re-raise priviliges */
1990
if(raise_privileges() == 0){
1993
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1994
int seckey_fd = open(seckey, O_RDONLY);
1995
if(seckey_fd == -1){
1996
perror_plus("open");
1998
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2000
perror_plus("fstat");
2002
if(S_ISREG(st.st_mode)
2003
and st.st_uid == 0 and st.st_gid == 0){
2004
ret = fchown(seckey_fd, uid, gid);
2006
perror_plus("fchown");
2010
TEMP_FAILURE_RETRY(close(seckey_fd));
2014
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2015
int pubkey_fd = open(pubkey, O_RDONLY);
2016
if(pubkey_fd == -1){
2017
perror_plus("open");
2019
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2021
perror_plus("fstat");
2023
if(S_ISREG(st.st_mode)
2024
and st.st_uid == 0 and st.st_gid == 0){
2025
ret = fchown(pubkey_fd, uid, gid);
2027
perror_plus("fchown");
2031
TEMP_FAILURE_RETRY(close(pubkey_fd));
2035
/* Lower privileges */
2040
/* Remove invalid interface names (except "none") */
2042
char *interface = NULL;
2043
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2045
if(strcmp(interface, "none") != 0
2046
and if_nametoindex(interface) == 0){
2047
if(interface[0] != '\0'){
2048
fprintf_plus(stderr, "Not using nonexisting interface"
2049
" \"%s\"\n", interface);
2051
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2057
/* Run network hooks */
2059
if(mc.interfaces != NULL){
2060
interfaces_hooks = malloc(mc.interfaces_size);
2061
if(interfaces_hooks == NULL){
2062
perror_plus("malloc");
2065
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2066
interfaces_hooks_size = mc.interfaces_size;
2067
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2070
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2071
interfaces_hooks : "", delay)){
2077
1295
avahi_set_log_function(empty_log);
1298
if(interface[0] == '\0'){
1299
struct dirent **direntries;
1300
ret = scandir(sys_class_net, &direntries, good_interface,
1303
/* Pick the first good interface */
1304
interface = strdup(direntries[0]->d_name);
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1308
if(interface == NULL){
1311
exitcode = EXIT_FAILURE;
1317
fprintf(stderr, "Could not find a network interface\n");
1318
exitcode = EXIT_FAILURE;
2080
1323
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2081
1324
from the signal handler */
2082
1325
/* Initialize the pseudo-RNG for Avahi */
2083
1326
srand((unsigned int) time(NULL));
2084
simple_poll = avahi_simple_poll_new();
2085
if(simple_poll == NULL){
2086
fprintf_plus(stderr,
2087
"Avahi: Failed to create simple poll object.\n");
1327
mc.simple_poll = avahi_simple_poll_new();
1328
if(mc.simple_poll == NULL){
1329
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
2088
1330
exitcode = EX_UNAVAILABLE;
2115
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2117
perror_plus("sigaction");
1359
perror("sigaction");
2118
1360
return EX_OSERR;
2120
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
2121
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
2123
perror_plus("sigaction");
1365
perror("sigaction");
2124
1366
exitcode = EX_OSERR;
2128
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2130
perror_plus("sigaction");
1372
perror("sigaction");
2131
1373
return EX_OSERR;
2133
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
2134
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2136
perror_plus("sigaction");
1378
perror("sigaction");
2137
1379
exitcode = EX_OSERR;
2141
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2143
perror_plus("sigaction");
1385
perror("sigaction");
2144
1386
return EX_OSERR;
2146
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
2147
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2149
perror_plus("sigaction");
2150
exitcode = EX_OSERR;
2155
/* If no interfaces were specified, make a list */
2156
if(mc.interfaces == NULL){
2157
struct dirent **direntries;
2158
/* Look for any good interfaces */
2159
ret = scandir(sys_class_net, &direntries, good_interface,
2162
/* Add all found interfaces to interfaces list */
2163
for(int i = 0; i < ret; ++i){
2164
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2165
direntries[i]->d_name);
2167
perror_plus("argz_add");
2171
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2172
direntries[i]->d_name);
2178
fprintf_plus(stderr, "Could not find a network interface\n");
2179
exitcode = EXIT_FAILURE;
2184
/* Bring up interfaces which are down */
2186
char *interface = NULL;
2187
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2189
/* If interface name is "none", stop bringing up interfaces.
2190
Also remove all instances of "none" from the list */
2191
if(strcmp(interface, "none") == 0){
2192
argz_delete(&mc.interfaces, &mc.interfaces_size,
2195
while((interface = argz_next(mc.interfaces,
2196
mc.interfaces_size, interface))){
2197
if(strcmp(interface, "none") == 0){
2198
argz_delete(&mc.interfaces, &mc.interfaces_size,
1391
perror("sigaction");
1392
exitcode = EX_OSERR;
1397
/* If the interface is down, bring it up */
1398
if(strcmp(interface, "none") != 0){
1399
if_index = (AvahiIfIndex) if_nametoindex(interface);
1401
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1402
exitcode = EX_UNAVAILABLE;
1410
/* Re-raise priviliges */
1418
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1419
messages about the network interface to mess up the prompt */
1420
ret = klogctl(8, NULL, 5);
1421
bool restore_loglevel = true;
1423
restore_loglevel = false;
1426
#endif /* __linux__ */
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1431
exitcode = EX_OSERR;
1433
if(restore_loglevel){
1434
ret = klogctl(7, NULL, 0);
1439
#endif /* __linux__ */
1440
/* Lower privileges */
1448
strcpy(network.ifr_name, interface);
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1451
perror("ioctl SIOCGIFFLAGS");
1453
if(restore_loglevel){
1454
ret = klogctl(7, NULL, 0);
1459
#endif /* __linux__ */
1460
exitcode = EX_OSERR;
1461
/* Lower privileges */
1469
if((network.ifr_flags & IFF_UP) == 0){
1470
network.ifr_flags |= IFF_UP;
1471
take_down_interface = true;
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1474
take_down_interface = false;
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1476
exitcode = EX_OSERR;
1478
if(restore_loglevel){
1479
ret = klogctl(7, NULL, 0);
1484
#endif /* __linux__ */
1485
/* Lower privileges */
1494
/* sleep checking until interface is running */
1495
for(int i=0; i < delay * 4; i++){
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1498
perror("ioctl SIOCGIFFLAGS");
1499
} else if(network.ifr_flags & IFF_RUNNING){
2205
bool interface_was_up = interface_is_up(interface);
2206
ret = bring_up_interface(interface, delay);
2207
if(not interface_was_up){
2210
perror_plus("Failed to bring up interface");
2212
ret_errno = argz_add(&interfaces_to_take_down,
2213
&interfaces_to_take_down_size,
2218
if(debug and (interfaces_to_take_down == NULL)){
2219
fprintf_plus(stderr, "No interfaces were brought up\n");
2223
/* If we only got one interface, explicitly use only that one */
2224
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2226
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2229
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
1503
ret = nanosleep(&sleeptime, NULL);
1504
if(ret == -1 and errno != EINTR){
1505
perror("nanosleep");
1508
if(not take_down_interface){
1509
/* We won't need the socket anymore */
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1516
if(restore_loglevel){
1517
/* Restores kernel loglevel to default */
1518
ret = klogctl(7, NULL, 0);
1523
#endif /* __linux__ */
1524
/* Lower privileges */
1526
if(take_down_interface){
1527
/* Lower privileges */
1533
/* Lower privileges permanently */
2236
ret = init_gnutls_global(pubkey, seckey, &mc);
1545
ret = init_gnutls_global(pubkey, seckey);
2238
fprintf_plus(stderr, "init_gnutls_global failed\n");
1547
fprintf(stderr, "init_gnutls_global failed\n");
2239
1548
exitcode = EX_UNAVAILABLE;