355
331
ssize_t plaintext_length = 0;
358
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
334
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
361
337
/* Create new GPGME data buffer from memory cryptotext */
362
338
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
364
340
if(rc != GPG_ERR_NO_ERROR){
365
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
341
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
342
gpgme_strsource(rc), gpgme_strerror(rc));
370
346
/* Create new empty GPGME data buffer for the plaintext */
371
347
rc = gpgme_data_new(&dh_plain);
372
348
if(rc != GPG_ERR_NO_ERROR){
373
fprintf_plus(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_data_new: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
349
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
350
gpgme_strsource(rc), gpgme_strerror(rc));
376
351
gpgme_data_release(dh_crypto);
382
357
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
383
358
if(rc != GPG_ERR_NO_ERROR){
384
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
385
gpgme_strsource(rc), gpgme_strerror(rc));
359
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
386
361
plaintext_length = -1;
388
363
gpgme_decrypt_result_t result;
389
364
result = gpgme_op_decrypt_result(mc.ctx);
390
365
if(result == NULL){
391
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
366
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
393
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
394
result->unsupported_algorithm);
395
fprintf_plus(stderr, "Wrong key usage: %u\n",
396
result->wrong_key_usage);
368
fprintf(stderr, "Unsupported algorithm: %s\n",
369
result->unsupported_algorithm);
370
fprintf(stderr, "Wrong key usage: %u\n",
371
result->wrong_key_usage);
397
372
if(result->file_name != NULL){
398
fprintf_plus(stderr, "File name: %s\n", result->file_name);
373
fprintf(stderr, "File name: %s\n", result->file_name);
400
375
gpgme_recipient_t recipient;
401
376
recipient = result->recipients;
402
377
while(recipient != NULL){
403
fprintf_plus(stderr, "Public key algorithm: %s\n",
404
gpgme_pubkey_algo_name
405
(recipient->pubkey_algo));
406
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
407
fprintf_plus(stderr, "Secret key available: %s\n",
408
recipient->status == GPG_ERR_NO_SECKEY
378
fprintf(stderr, "Public key algorithm: %s\n",
379
gpgme_pubkey_algo_name(recipient->pubkey_algo));
380
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
381
fprintf(stderr, "Secret key available: %s\n",
382
recipient->status == GPG_ERR_NO_SECKEY
410
384
recipient = recipient->next;
508
483
/* OpenPGP credentials */
509
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
485
if(ret != GNUTLS_E_SUCCESS){
511
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
512
safer_gnutls_strerror(ret));
486
fprintf(stderr, "GnuTLS memory error: %s\n",
487
safer_gnutls_strerror(ret));
513
488
gnutls_global_deinit();
518
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
519
" secret key %s as GnuTLS credentials\n",
493
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
494
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
524
498
ret = gnutls_certificate_set_openpgp_key_file
525
499
(mc.cred, pubkeyfilename, seckeyfilename,
526
500
GNUTLS_OPENPGP_FMT_BASE64);
527
501
if(ret != GNUTLS_E_SUCCESS){
529
"Error[%d] while reading the OpenPGP key pair ('%s',"
530
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
531
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
532
safer_gnutls_strerror(ret));
503
"Error[%d] while reading the OpenPGP key pair ('%s',"
504
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
505
fprintf(stderr, "The GnuTLS error is: %s\n",
506
safer_gnutls_strerror(ret));
536
510
/* GnuTLS server initialization */
537
511
ret = gnutls_dh_params_init(&mc.dh_params);
538
512
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
540
" initialization: %s\n",
541
safer_gnutls_strerror(ret));
513
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
514
" %s\n", safer_gnutls_strerror(ret));
544
517
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
545
518
if(ret != GNUTLS_E_SUCCESS){
546
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
547
safer_gnutls_strerror(ret));
519
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
520
safer_gnutls_strerror(ret));
1030
999
char ip[AVAHI_ADDRESS_STR_MAX];
1031
1000
avahi_address_snprint(ip, sizeof(ip), address);
1033
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1034
PRIdMAX ") on port %" PRIu16 "\n", name,
1035
host_name, ip, (intmax_t)interface, port);
1002
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1003
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1004
ip, (intmax_t)interface, port);
1037
int ret = start_mandos_communication(ip, (in_port_t)port,
1006
int ret = start_mandos_communication(ip, port, interface,
1039
1007
avahi_proto_to_af(proto));
1041
1009
avahi_simple_poll_quit(mc.simple_poll);
1043
if(not add_server(ip, (in_port_t)port, interface,
1044
avahi_proto_to_af(proto))){
1045
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
1123
1084
errno = old_errno;
1126
bool get_flags(const char *ifname, struct ifreq *ifr){
1130
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1133
perror_plus("socket");
1137
strcpy(ifr->ifr_name, ifname);
1138
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1092
int good_interface(const struct dirent *if_entry){
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1101
perror_plus("asprintf");
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
perror_plus("open");
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1125
perror_plus("read");
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1142
perror_plus("ioctl SIOCGIFFLAGS");
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1150
bool good_flags(const char *ifname, const struct ifreq *ifr){
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
1152
/* Reject the loopback device */
1153
if(ifr->ifr_flags & IFF_LOOPBACK){
1153
if(flags & IFF_LOOPBACK){
1155
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1160
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1163
fprintf_plus(stderr, "Accepting point-to-point interface"
1164
" \"%s\"\n", ifname);
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1168
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1169
if(not (flags & IFF_BROADCAST)){
1171
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1172
" \"%s\"\n", ifname);
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1176
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(ifr->ifr_flags & IFF_NOARP){
1177
if(flags & IFF_NOARP){
1179
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1185
1184
/* Accept this device */
1187
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
* This function determines if a directory entry in /sys/class/net
1194
* corresponds to an acceptable network device.
1195
* (This function is passed to scandir(3) as a filter function.)
1197
int good_interface(const struct dirent *if_entry){
1198
if(if_entry->d_name[0] == '.'){
1203
if(not get_flags(if_entry->d_name, &ifr)){
1205
fprintf_plus(stderr, "Failed to get flags for interface "
1206
"\"%s\"\n", if_entry->d_name);
1211
if(not good_flags(if_entry->d_name, &ifr)){
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1218
* This function determines if a network interface is up.
1220
bool interface_is_up(const char *interface){
1222
if(not get_flags(interface, &ifr)){
1224
fprintf_plus(stderr, "Failed to get flags for interface "
1225
"\"%s\"\n", interface);
1230
return (bool)(ifr.ifr_flags & IFF_UP);
1234
* This function determines if a network interface is running
1236
bool interface_is_running(const char *interface){
1238
if(not get_flags(interface, &ifr)){
1240
fprintf_plus(stderr, "Failed to get flags for interface "
1241
"\"%s\"\n", interface);
1246
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1249
1192
int notdotentries(const struct dirent *direntry){
1250
1193
/* Skip "." and ".." */
1251
1194
if(direntry->d_name[0] == '.'
1260
/* Is this directory entry a runnable program? */
1261
int runnable_hook(const struct dirent *direntry){
1266
if((direntry->d_name)[0] == '\0'){
1271
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1272
"abcdefghijklmnopqrstuvwxyz"
1275
if((direntry->d_name)[sret] != '\0'){
1276
/* Contains non-allowed characters */
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1284
char *fullname = NULL;
1285
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1287
perror_plus("asprintf");
1291
ret = stat(fullname, &st);
1294
perror_plus("Could not stat hook");
1298
if(not (S_ISREG(st.st_mode))){
1299
/* Not a regular file */
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1306
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1307
/* Not executable */
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1321
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1323
1205
struct timespec now;
1324
1206
struct timespec waited_time;
1325
1207
intmax_t block_time;
1328
1210
if(mc.current_server == NULL){
1330
fprintf_plus(stderr, "Wait until first server is found."
1213
"Wait until first server is found. No timeout!\n");
1333
1215
ret = avahi_simple_poll_iterate(s, -1);
1336
fprintf_plus(stderr, "Check current_server if we should run"
1218
fprintf(stderr, "Check current_server if we should run it,"
1339
1221
/* the current time */
1340
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1383
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1386
if (ret > 0 or errno != EINTR){
1267
if (ret > 0 or errno != EINTR) {
1387
1268
return (ret != 1) ? ret : 0;
1393
/* Set effective uid to 0, return errno */
1394
error_t raise_privileges(void){
1395
error_t old_errno = errno;
1396
error_t ret_errno = 0;
1397
if(seteuid(0) == -1){
1399
perror_plus("seteuid");
1405
/* Set effective and real user ID to 0. Return errno. */
1406
error_t raise_privileges_permanently(void){
1407
error_t old_errno = errno;
1408
error_t ret_errno = raise_privileges();
1413
if(setuid(0) == -1){
1415
perror_plus("seteuid");
1421
/* Set effective user ID to unprivileged saved user ID */
1422
error_t lower_privileges(void){
1423
error_t old_errno = errno;
1424
error_t ret_errno = 0;
1425
if(seteuid(uid) == -1){
1427
perror_plus("seteuid");
1433
/* Lower privileges permanently */
1434
error_t lower_privileges_permanently(void){
1435
error_t old_errno = errno;
1436
error_t ret_errno = 0;
1437
if(setuid(uid) == -1){
1439
perror_plus("setuid");
1445
bool run_network_hooks(const char *mode, const char *interface,
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1453
if(errno == ENOENT){
1455
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1456
" found\n", hookdir);
1459
perror_plus("scandir");
1462
int devnull = open("/dev/null", O_RDONLY);
1463
for(int i = 0; i < numhooks; i++){
1464
direntry = direntries[i];
1465
char *fullname = NULL;
1466
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1468
perror_plus("asprintf");
1472
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1475
pid_t hook_pid = fork();
1478
/* Raise privileges */
1479
raise_privileges_permanently();
1484
perror_plus("setgid");
1486
/* Reset supplementary groups */
1488
ret = setgroups(0, NULL);
1490
perror_plus("setgroups");
1492
dup2(devnull, STDIN_FILENO);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1497
perror_plus("setenv");
1500
ret = setenv("DEVICE", interface, 1);
1502
perror_plus("setenv");
1505
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1507
perror_plus("setenv");
1510
ret = setenv("MODE", mode, 1);
1512
perror_plus("setenv");
1516
ret = asprintf(&delaystring, "%f", delay);
1518
perror_plus("asprintf");
1521
ret = setenv("DELAY", delaystring, 1);
1524
perror_plus("setenv");
1528
if(connect_to != NULL){
1529
ret = setenv("CONNECT", connect_to, 1);
1531
perror_plus("setenv");
1535
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1536
perror_plus("execl");
1537
_exit(EXIT_FAILURE);
1541
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1542
perror_plus("waitpid");
1546
if(WIFEXITED(status)){
1547
if(WEXITSTATUS(status) != 0){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1549
" with status %d\n", direntry->d_name,
1550
WEXITSTATUS(status));
1554
} else if(WIFSIGNALED(status)){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1556
" signal %d\n", direntry->d_name,
1561
fprintf_plus(stderr, "Warning: network hook \"%s\""
1562
" crashed\n", direntry->d_name);
1569
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1578
error_t bring_up_interface(const char *const interface,
1581
error_t old_errno = errno;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1584
struct ifreq network;
1585
unsigned int if_index = if_nametoindex(interface);
1587
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1597
if(not interface_is_up(interface)){
1598
if(not get_flags(interface, &network) and debug){
1600
fprintf_plus(stderr, "Failed to get flags for interface "
1601
"\"%s\"\n", interface);
1604
network.ifr_flags |= IFF_UP;
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1609
perror_plus("socket");
1621
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1625
/* Raise priviliges */
1629
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1630
messages about the network interface to mess up the prompt */
1631
int ret_linux = klogctl(8, NULL, 5);
1632
bool restore_loglevel = true;
1633
if(ret_linux == -1){
1634
restore_loglevel = false;
1635
perror_plus("klogctl");
1637
#endif /* __linux__ */
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1641
if(restore_loglevel){
1642
ret_linux = klogctl(7, NULL, 0);
1643
if(ret_linux == -1){
1644
perror_plus("klogctl");
1647
#endif /* __linux__ */
1649
/* Lower privileges */
1652
/* Close the socket */
1653
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1655
perror_plus("close");
1658
if(ret_setflags == -1){
1660
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1665
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1669
/* Sleep checking until interface is running.
1670
Check every 0.25s, up to total time of delay */
1671
for(int i=0; i < delay * 4; i++){
1672
if(interface_is_running(interface)){
1675
struct timespec sleeptime = { .tv_nsec = 250000000 };
1676
ret = nanosleep(&sleeptime, NULL);
1677
if(ret == -1 and errno != EINTR){
1678
perror_plus("nanosleep");
1686
error_t take_down_interface(const char *const interface){
1688
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1691
struct ifreq network;
1692
unsigned int if_index = if_nametoindex(interface);
1694
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1698
if(interface_is_up(interface)){
1699
if(not get_flags(interface, &network) and debug){
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1702
"\"%s\"\n", interface);
1705
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1710
perror_plus("socket");
1716
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1720
/* Raise priviliges */
1723
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1726
/* Lower privileges */
1729
/* Close the socket */
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1732
perror_plus("close");
1735
if(ret_setflags == -1){
1737
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1742
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1750
1274
int main(int argc, char *argv[]){
1751
1275
AvahiSServiceBrowser *sb = NULL;
1754
1278
intmax_t tmpmax;
1756
1280
int exitcode = EXIT_SUCCESS;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1759
char *interfaces_to_take_down = NULL;
1760
size_t interfaces_to_take_down_size = 0;
1281
const char *interface = "";
1282
struct ifreq network;
1284
bool take_down_interface = false;
1761
1287
char tempdir[] = "/tmp/mandosXXXXXX";
1762
1288
bool tempdir_created = false;
1763
1289
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1764
1290
const char *seckey = PATHDIR "/" SECKEY;
1765
1291
const char *pubkey = PATHDIR "/" PUBKEY;
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
1769
1293
bool gnutls_initialized = false;
1770
1294
bool gpgme_initialized = false;
1948
/* Work around Debian bug #633582:
1949
<http://bugs.debian.org/633582> */
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
1955
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1956
int seckey_fd = open(seckey, O_RDONLY);
1957
if(seckey_fd == -1){
1958
perror_plus("open");
1960
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1962
perror_plus("fstat");
1964
if(S_ISREG(st.st_mode)
1965
and st.st_uid == 0 and st.st_gid == 0){
1966
ret = fchown(seckey_fd, uid, gid);
1968
perror_plus("fchown");
1972
TEMP_FAILURE_RETRY(close(seckey_fd));
1976
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1977
int pubkey_fd = open(pubkey, O_RDONLY);
1978
if(pubkey_fd == -1){
1979
perror_plus("open");
1981
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1983
perror_plus("fstat");
1985
if(S_ISREG(st.st_mode)
1986
and st.st_uid == 0 and st.st_gid == 0){
1987
ret = fchown(pubkey_fd, uid, gid);
1989
perror_plus("fchown");
1993
TEMP_FAILURE_RETRY(close(pubkey_fd));
1997
/* Lower privileges */
2001
perror_plus("seteuid");
2006
/* Remove empty interface names */
2008
char *interface = NULL;
2009
while((interface = argz_next(interfaces, interfaces_size,
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2013
fprintf_plus(stderr, "Not using nonexisting interface"
2014
" \"%s\"\n", interface);
2016
argz_delete(&interfaces, &interfaces_size, interface);
2022
/* Run network hooks */
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2027
if(interfaces_hooks == NULL){
2028
perror_plus("malloc");
2031
memcpy(interfaces_hooks, interfaces, interfaces_size);
2032
interfaces_hooks_size = interfaces_size;
2033
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2036
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2037
interfaces_hooks : "", delay)){
2043
1460
avahi_set_log_function(empty_log);
1463
if(interface[0] == '\0'){
1464
struct dirent **direntries;
1465
ret = scandir(sys_class_net, &direntries, good_interface,
1468
/* Pick the first good interface */
1469
interface = strdup(direntries[0]->d_name);
1471
fprintf(stderr, "Using interface \"%s\"\n", interface);
1473
if(interface == NULL){
1474
perror_plus("malloc");
1476
exitcode = EXIT_FAILURE;
1482
fprintf(stderr, "Could not find a network interface\n");
1483
exitcode = EXIT_FAILURE;
2046
1488
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2047
1489
from the signal handler */
2121
/* If no interfaces were specified, make a list */
2122
if(interfaces == NULL){
2123
struct dirent **direntries;
2124
/* Look for any good interfaces */
2125
ret = scandir(sys_class_net, &direntries, good_interface,
2128
/* Add all found interfaces to interfaces list */
2129
for(int i = 0; i < ret; ++i){
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2131
direntries[i]->d_name);
2133
perror_plus("argz_add");
2137
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2138
direntries[i]->d_name);
1562
/* If the interface is down, bring it up */
1563
if(strcmp(interface, "none") != 0){
1564
if_index = (AvahiIfIndex) if_nametoindex(interface);
1566
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1567
exitcode = EX_UNAVAILABLE;
1575
/* Re-raise priviliges */
1579
perror_plus("seteuid");
1583
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1584
messages about the network interface to mess up the prompt */
1585
ret = klogctl(8, NULL, 5);
1586
bool restore_loglevel = true;
1588
restore_loglevel = false;
1589
perror_plus("klogctl");
1591
#endif /* __linux__ */
1593
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1595
perror_plus("socket");
1596
exitcode = EX_OSERR;
1598
if(restore_loglevel){
1599
ret = klogctl(7, NULL, 0);
1601
perror_plus("klogctl");
1604
#endif /* __linux__ */
1605
/* Lower privileges */
1609
perror_plus("seteuid");
1613
strcpy(network.ifr_name, interface);
1614
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1616
perror_plus("ioctl SIOCGIFFLAGS");
1618
if(restore_loglevel){
1619
ret = klogctl(7, NULL, 0);
1621
perror_plus("klogctl");
1624
#endif /* __linux__ */
1625
exitcode = EX_OSERR;
1626
/* Lower privileges */
1630
perror_plus("seteuid");
1634
if((network.ifr_flags & IFF_UP) == 0){
1635
network.ifr_flags |= IFF_UP;
1636
take_down_interface = true;
1637
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1639
take_down_interface = false;
1640
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1641
exitcode = EX_OSERR;
1643
if(restore_loglevel){
1644
ret = klogctl(7, NULL, 0);
1646
perror_plus("klogctl");
1649
#endif /* __linux__ */
1650
/* Lower privileges */
1654
perror_plus("seteuid");
1659
/* Sleep checking until interface is running.
1660
Check every 0.25s, up to total time of delay */
1661
for(int i=0; i < delay * 4; i++){
1662
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1664
perror_plus("ioctl SIOCGIFFLAGS");
1665
} else if(network.ifr_flags & IFF_RUNNING){
1668
struct timespec sleeptime = { .tv_nsec = 250000000 };
1669
ret = nanosleep(&sleeptime, NULL);
1670
if(ret == -1 and errno != EINTR){
1671
perror_plus("nanosleep");
1674
if(not take_down_interface){
1675
/* We won't need the socket anymore */
1676
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1678
perror_plus("close");
1682
if(restore_loglevel){
1683
/* Restores kernel loglevel to default */
1684
ret = klogctl(7, NULL, 0);
1686
perror_plus("klogctl");
1689
#endif /* __linux__ */
1690
/* Lower privileges */
1692
if(take_down_interface){
1693
/* Lower privileges */
1696
perror_plus("seteuid");
2144
fprintf_plus(stderr, "Could not find a network interface\n");
2145
exitcode = EXIT_FAILURE;
2150
/* If we only got one interface, explicitly use only that one */
2151
if(argz_count(interfaces, interfaces_size) == 1){
2153
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2156
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2159
/* Bring up interfaces which are down */
2160
if(not (argz_count(interfaces, interfaces_size) == 1
2161
and strcmp(interfaces, "none") == 0)){
2162
char *interface = NULL;
2163
while((interface = argz_next(interfaces, interfaces_size,
2165
bool interface_was_up = interface_is_up(interface);
2166
ret = bring_up_interface(interface, delay);
2167
if(not interface_was_up){
2170
perror_plus("Failed to bring up interface");
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
1699
/* Lower privileges permanently */
1702
perror_plus("setuid");
2180
interfaces_size = 0;
2181
if(debug and (interfaces_to_take_down == NULL)){
2182
fprintf_plus(stderr, "No interfaces were brought up\n");
2393
/* Re-raise priviliges */
2397
/* Run network hooks */
2398
run_network_hooks("stop", interfaces_hooks != NULL ?
2399
interfaces_hooks : "", delay);
2401
/* Take down the network interfaces which were brought up */
2403
char *interface = NULL;
2404
while((interface=argz_next(interfaces_to_take_down,
2405
interfaces_to_take_down_size,
2407
ret_errno = take_down_interface(interface);
2410
perror_plus("Failed to take down interface");
1903
/* Take down the network interface */
1904
if(take_down_interface){
1905
/* Re-raise priviliges */
1909
perror_plus("seteuid");
1912
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1914
perror_plus("ioctl SIOCGIFFLAGS");
1915
} else if(network.ifr_flags & IFF_UP) {
1916
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1917
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1919
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2413
if(debug and (interfaces_to_take_down == NULL)){
2414
fprintf_plus(stderr, "No interfaces needed to be taken"
1922
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1924
perror_plus("close");
1926
/* Lower privileges permanently */
1930
perror_plus("setuid");
2419
lower_privileges_permanently();
2422
free(interfaces_to_take_down);
2423
free(interfaces_hooks);
2425
1935
/* Removes the GPGME temp directory and all files inside */
2426
1936
if(tempdir_created){
2427
1937
struct dirent **direntries = NULL;
2428
1938
struct dirent *direntry = NULL;
2429
int numentries = scandir(tempdir, &direntries, notdotentries,
2431
if (numentries > 0){
2432
for(int i = 0; i < numentries; i++){
1939
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1941
for(int i = 0; i < ret; i++){
2433
1942
direntry = direntries[i];
2434
1943
char *fullname = NULL;
2435
1944
ret = asprintf(&fullname, "%s/%s", tempdir,