215
233
if(new_server->ip == NULL){
216
234
perror_plus("strdup");
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
239
perror_plus("clock_gettime");
219
242
/* Special case of first server */
220
if (mc.current_server == NULL){
243
if(*current_server == NULL){
221
244
new_server->next = new_server;
222
245
new_server->prev = new_server;
223
mc.current_server = new_server;
224
/* Place the new server last in the list */
246
*current_server = new_server;
226
new_server->next = mc.current_server;
227
new_server->prev = mc.current_server->prev;
248
/* Place the new server last in the list */
249
new_server->next = *current_server;
250
new_server->prev = (*current_server)->prev;
228
251
new_server->prev->next = new_server;
229
mc.current_server->prev = new_server;
231
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
233
perror_plus("clock_gettime");
252
(*current_server)->prev = new_server;
240
258
* Initialize GPGME.
242
static bool init_gpgme(const char *seckey, const char *pubkey,
243
const char *tempdir){
260
__attribute__((nonnull, warn_unused_result))
261
static bool init_gpgme(const char * const seckey,
262
const char * const pubkey,
263
const char * const tempdir,
244
265
gpgme_error_t rc;
245
266
gpgme_engine_info_t engine_info;
249
269
* Helper function to insert pub and seckey to the engine keyring.
251
bool import_key(const char *filename){
271
bool import_key(const char * const filename){
254
274
gpgme_data_t pgp_data;
360
383
rc = gpgme_data_new(&dh_plain);
361
384
if(rc != GPG_ERR_NO_ERROR){
362
385
fprintf_plus(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
386
"bad gpgme_data_new: %s: %s\n",
387
gpgme_strsource(rc), gpgme_strerror(rc));
365
388
gpgme_data_release(dh_crypto);
369
392
/* Decrypt data from the cryptotext data buffer to the plaintext
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
394
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
372
395
if(rc != GPG_ERR_NO_ERROR){
373
396
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
374
gpgme_strsource(rc), gpgme_strerror(rc));
397
gpgme_strsource(rc), gpgme_strerror(rc));
375
398
plaintext_length = -1;
377
400
gpgme_decrypt_result_t result;
378
result = gpgme_op_decrypt_result(mc.ctx);
401
result = gpgme_op_decrypt_result(mc->ctx);
379
402
if(result == NULL){
380
403
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
382
405
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
383
result->unsupported_algorithm);
406
result->unsupported_algorithm);
384
407
fprintf_plus(stderr, "Wrong key usage: %u\n",
385
result->wrong_key_usage);
408
result->wrong_key_usage);
386
409
if(result->file_name != NULL){
387
410
fprintf_plus(stderr, "File name: %s\n", result->file_name);
496
524
/* OpenPGP credentials */
497
ret = gnutls_certificate_allocate_credentials(&mc.cred);
525
ret = gnutls_certificate_allocate_credentials(&mc->cred);
498
526
if(ret != GNUTLS_E_SUCCESS){
499
fprintf_plus(stderr, "GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
527
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
528
safer_gnutls_strerror(ret));
500
529
gnutls_global_deinit();
505
534
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
506
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
535
" secret key %s as GnuTLS credentials\n",
510
540
ret = gnutls_certificate_set_openpgp_key_file
511
(mc.cred, pubkeyfilename, seckeyfilename,
541
(mc->cred, pubkeyfilename, seckeyfilename,
512
542
GNUTLS_OPENPGP_FMT_BASE64);
513
543
if(ret != GNUTLS_E_SUCCESS){
514
544
fprintf_plus(stderr,
515
545
"Error[%d] while reading the OpenPGP key pair ('%s',"
516
546
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
517
fprintf_plus(stderr, "The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
547
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
548
safer_gnutls_strerror(ret));
521
552
/* GnuTLS server initialization */
522
ret = gnutls_dh_params_init(&mc.dh_params);
553
ret = gnutls_dh_params_init(&mc->dh_params);
523
554
if(ret != GNUTLS_E_SUCCESS){
524
fprintf_plus(stderr, "Error in GnuTLS DH parameter initialization:"
525
" %s\n", safer_gnutls_strerror(ret));
555
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
556
" initialization: %s\n",
557
safer_gnutls_strerror(ret));
528
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
560
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
529
561
if(ret != GNUTLS_E_SUCCESS){
530
562
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
531
safer_gnutls_strerror(ret));
563
safer_gnutls_strerror(ret));
535
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
567
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
541
gnutls_certificate_free_credentials(mc.cred);
573
gnutls_certificate_free_credentials(mc->cred);
542
574
gnutls_global_deinit();
543
gnutls_dh_params_deinit(mc.dh_params);
575
gnutls_dh_params_deinit(mc->dh_params);
547
static int init_gnutls_session(gnutls_session_t *session){
579
__attribute__((nonnull, warn_unused_result))
580
static int init_gnutls_session(gnutls_session_t *session,
549
583
/* GnuTLS session creation */
718
778
if(if_indextoname((unsigned int)if_index, interface) == NULL){
719
779
perror_plus("if_indextoname");
721
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
722
ip, interface, port);
781
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
782
"\n", ip, interface, (uintmax_t)port);
725
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n", ip, port);
785
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
786
ip, (uintmax_t)port);
727
788
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
728
789
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
730
790
if(af == AF_INET6){
731
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
791
ret = getnameinfo((struct sockaddr *)&to,
792
sizeof(struct sockaddr_in6),
793
addrstr, sizeof(addrstr), NULL, 0,
734
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in),
798
addrstr, sizeof(addrstr), NULL, 0,
738
perror_plus("inet_ntop");
740
if(strcmp(addrstr, ip) != 0){
741
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
801
if(ret == EAI_SYSTEM){
802
perror_plus("getnameinfo");
803
} else if(ret != 0) {
804
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
805
} else if(strcmp(addrstr, ip) != 0){
806
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1085
1174
signal_received = sig;
1086
1175
int old_errno = errno;
1087
1176
/* set main loop to exit */
1088
if(mc.simple_poll != NULL){
1089
avahi_simple_poll_quit(mc.simple_poll);
1177
if(simple_poll != NULL){
1178
avahi_simple_poll_quit(simple_poll);
1091
1180
errno = old_errno;
1183
__attribute__((nonnull, warn_unused_result))
1094
1184
bool get_flags(const char *ifname, struct ifreq *ifr){
1097
1188
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1099
1191
perror_plus("socket");
1102
1195
strcpy(ifr->ifr_name, ifname);
1103
1196
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1106
1200
perror_plus("ioctl SIOCGIFFLAGS");
1208
__attribute__((nonnull, warn_unused_result))
1113
1209
bool good_flags(const char *ifname, const struct ifreq *ifr){
1115
1211
/* Reject the loopback device */
1116
1212
if(ifr->ifr_flags & IFF_LOOPBACK){
1118
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n", ifname);
1214
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1122
1219
/* Accept point-to-point devices only if connect_to is specified */
1123
1220
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1125
fprintf_plus(stderr, "Accepting point-to-point interface \"%s\"\n", ifname);
1222
fprintf_plus(stderr, "Accepting point-to-point interface"
1223
" \"%s\"\n", ifname);
1129
1227
/* Otherwise, reject non-broadcast-capable devices */
1130
1228
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1132
fprintf_plus(stderr, "Rejecting non-broadcast interface \"%s\"\n", ifname);
1230
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1231
" \"%s\"\n", ifname);
1136
1235
/* Reject non-ARP interfaces (including dummy interfaces) */
1137
1236
if(ifr->ifr_flags & IFF_NOARP){
1139
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1238
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1161
1262
struct ifreq ifr;
1162
1263
if(not get_flags(if_entry->d_name, &ifr)){
1164
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1170
if(not good_flags(if_entry->d_name, &ifr)){
1177
* This function determines if a directory entry in /sys/class/net
1178
* corresponds to an acceptable network device which is up.
1179
* (This function is passed to scandir(3) as a filter function.)
1181
int up_interface(const struct dirent *if_entry){
1182
if(if_entry->d_name[0] == '.'){
1187
if(not get_flags(if_entry->d_name, &ifr)){
1189
fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",
1195
/* Reject down interfaces */
1196
if(not (ifr.ifr_flags & IFF_UP)){
1198
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1204
/* Reject non-running interfaces */
1205
if(not (ifr.ifr_flags & IFF_RUNNING)){
1207
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1213
if(not good_flags(if_entry->d_name, &ifr)){
1265
fprintf_plus(stderr, "Failed to get flags for interface "
1266
"\"%s\"\n", if_entry->d_name);
1271
if(not good_flags(if_entry->d_name, &ifr)){
1278
* This function determines if a network interface is up.
1280
__attribute__((nonnull, warn_unused_result))
1281
bool interface_is_up(const char *interface){
1283
if(not get_flags(interface, &ifr)){
1285
fprintf_plus(stderr, "Failed to get flags for interface "
1286
"\"%s\"\n", interface);
1291
return (bool)(ifr.ifr_flags & IFF_UP);
1295
* This function determines if a network interface is running
1297
__attribute__((nonnull, warn_unused_result))
1298
bool interface_is_running(const char *interface){
1300
if(not get_flags(interface, &ifr)){
1302
fprintf_plus(stderr, "Failed to get flags for interface "
1303
"\"%s\"\n", interface);
1308
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1311
__attribute__((nonnull, pure, warn_unused_result))
1219
1312
int notdotentries(const struct dirent *direntry){
1220
1313
/* Skip "." and ".." */
1221
1314
if(direntry->d_name[0] == '.'
1347
1449
ret = avahi_simple_poll_iterate(s, (int)block_time);
1350
if (ret > 0 or errno != EINTR){
1452
if(ret > 0 or errno != EINTR){
1351
1453
return (ret != 1) ? ret : 0;
1459
/* Set effective uid to 0, return errno */
1460
__attribute__((warn_unused_result))
1461
error_t raise_privileges(void){
1462
error_t old_errno = errno;
1463
error_t ret_errno = 0;
1464
if(seteuid(0) == -1){
1466
perror_plus("seteuid");
1472
/* Set effective and real user ID to 0. Return errno. */
1473
__attribute__((warn_unused_result))
1474
error_t raise_privileges_permanently(void){
1475
error_t old_errno = errno;
1476
error_t ret_errno = raise_privileges();
1481
if(setuid(0) == -1){
1483
perror_plus("seteuid");
1489
/* Set effective user ID to unprivileged saved user ID */
1490
__attribute__((warn_unused_result))
1491
error_t lower_privileges(void){
1492
error_t old_errno = errno;
1493
error_t ret_errno = 0;
1494
if(seteuid(uid) == -1){
1496
perror_plus("seteuid");
1502
/* Lower privileges permanently */
1503
__attribute__((warn_unused_result))
1504
error_t lower_privileges_permanently(void){
1505
error_t old_errno = errno;
1506
error_t ret_errno = 0;
1507
if(setuid(uid) == -1){
1509
perror_plus("setuid");
1515
__attribute__((nonnull))
1516
void run_network_hooks(const char *mode, const char *interface,
1518
struct dirent **direntries;
1519
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1522
if(errno == ENOENT){
1524
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1525
" found\n", hookdir);
1528
perror_plus("scandir");
1531
struct dirent *direntry;
1533
int devnull = open("/dev/null", O_RDONLY);
1534
for(int i = 0; i < numhooks; i++){
1535
direntry = direntries[i];
1536
char *fullname = NULL;
1537
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1539
perror_plus("asprintf");
1543
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1546
pid_t hook_pid = fork();
1549
/* Raise privileges */
1550
if(raise_privileges_permanently() != 0){
1551
perror_plus("Failed to raise privileges");
1558
perror_plus("setgid");
1561
/* Reset supplementary groups */
1563
ret = setgroups(0, NULL);
1565
perror_plus("setgroups");
1568
ret = dup2(devnull, STDIN_FILENO);
1570
perror_plus("dup2(devnull, STDIN_FILENO)");
1573
ret = close(devnull);
1575
perror_plus("close");
1578
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1580
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1583
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1585
perror_plus("setenv");
1588
ret = setenv("DEVICE", interface, 1);
1590
perror_plus("setenv");
1593
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1595
perror_plus("setenv");
1598
ret = setenv("MODE", mode, 1);
1600
perror_plus("setenv");
1604
ret = asprintf(&delaystring, "%f", (double)delay);
1606
perror_plus("asprintf");
1609
ret = setenv("DELAY", delaystring, 1);
1612
perror_plus("setenv");
1616
if(connect_to != NULL){
1617
ret = setenv("CONNECT", connect_to, 1);
1619
perror_plus("setenv");
1623
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1624
perror_plus("execl");
1625
_exit(EXIT_FAILURE);
1629
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1630
perror_plus("waitpid");
1634
if(WIFEXITED(status)){
1635
if(WEXITSTATUS(status) != 0){
1636
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1637
" with status %d\n", direntry->d_name,
1638
WEXITSTATUS(status));
1642
} else if(WIFSIGNALED(status)){
1643
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1644
" signal %d\n", direntry->d_name,
1649
fprintf_plus(stderr, "Warning: network hook \"%s\""
1650
" crashed\n", direntry->d_name);
1657
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1665
__attribute__((nonnull, warn_unused_result))
1666
error_t bring_up_interface(const char *const interface,
1668
error_t old_errno = errno;
1670
struct ifreq network;
1671
unsigned int if_index = if_nametoindex(interface);
1673
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1683
if(not interface_is_up(interface)){
1684
error_t ret_errno = 0, ioctl_errno = 0;
1685
if(not get_flags(interface, &network)){
1687
fprintf_plus(stderr, "Failed to get flags for interface "
1688
"\"%s\"\n", interface);
1692
network.ifr_flags |= IFF_UP; /* set flag */
1694
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1697
perror_plus("socket");
1703
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1705
perror_plus("close");
1712
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1716
/* Raise privileges */
1717
ret_errno = raise_privileges();
1718
bool restore_loglevel = false;
1720
perror_plus("Failed to raise privileges");
1725
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1726
messages about the network interface to mess up the prompt */
1727
ret_linux = klogctl(8, NULL, 5);
1728
if(ret_linux == -1){
1729
perror_plus("klogctl");
1731
restore_loglevel = true;
1734
#endif /* __linux__ */
1735
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1736
ioctl_errno = errno;
1738
if(restore_loglevel){
1739
ret_linux = klogctl(7, NULL, 0);
1740
if(ret_linux == -1){
1741
perror_plus("klogctl");
1744
#endif /* __linux__ */
1746
/* If raise_privileges() succeeded above */
1748
/* Lower privileges */
1749
ret_errno = lower_privileges();
1752
perror_plus("Failed to lower privileges");
1756
/* Close the socket */
1757
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1759
perror_plus("close");
1762
if(ret_setflags == -1){
1763
errno = ioctl_errno;
1764
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1769
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1773
/* Sleep checking until interface is running.
1774
Check every 0.25s, up to total time of delay */
1775
for(int i=0; i < delay * 4; i++){
1776
if(interface_is_running(interface)){
1779
struct timespec sleeptime = { .tv_nsec = 250000000 };
1780
ret = nanosleep(&sleeptime, NULL);
1781
if(ret == -1 and errno != EINTR){
1782
perror_plus("nanosleep");
1790
__attribute__((nonnull, warn_unused_result))
1791
error_t take_down_interface(const char *const interface){
1792
error_t old_errno = errno;
1793
struct ifreq network;
1794
unsigned int if_index = if_nametoindex(interface);
1796
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1800
if(interface_is_up(interface)){
1801
error_t ret_errno = 0, ioctl_errno = 0;
1802
if(not get_flags(interface, &network) and debug){
1804
fprintf_plus(stderr, "Failed to get flags for interface "
1805
"\"%s\"\n", interface);
1809
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1811
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1814
perror_plus("socket");
1820
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1824
/* Raise privileges */
1825
ret_errno = raise_privileges();
1827
perror_plus("Failed to raise privileges");
1829
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1830
ioctl_errno = errno;
1832
/* If raise_privileges() succeeded above */
1834
/* Lower privileges */
1835
ret_errno = lower_privileges();
1838
perror_plus("Failed to lower privileges");
1842
/* Close the socket */
1843
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1845
perror_plus("close");
1848
if(ret_setflags == -1){
1849
errno = ioctl_errno;
1850
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1855
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1357
1863
int main(int argc, char *argv[]){
1864
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1865
.priority = "SECURE256:!CTYPE-X.509:"
1866
"+CTYPE-OPENPGP", .current_server = NULL,
1867
.interfaces = NULL, .interfaces_size = 0 };
1358
1868
AvahiSServiceBrowser *sb = NULL;
1361
1871
intmax_t tmpmax;
1363
1873
int exitcode = EXIT_SUCCESS;
1364
const char *interface = "";
1365
struct ifreq network;
1367
bool take_down_interface = false;
1370
char tempdir[] = "/tmp/mandosXXXXXX";
1371
bool tempdir_created = false;
1874
char *interfaces_to_take_down = NULL;
1875
size_t interfaces_to_take_down_size = 0;
1876
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1877
char old_tempdir[] = "/tmp/mandosXXXXXX";
1878
char *tempdir = NULL;
1372
1879
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1373
1880
const char *seckey = PATHDIR "/" SECKEY;
1374
1881
const char *pubkey = PATHDIR "/" PUBKEY;
1882
char *interfaces_hooks = NULL;
1376
1884
bool gnutls_initialized = false;
1377
1885
bool gpgme_initialized = false;
1552
2063
/* Work around Debian bug #633582:
1553
2064
<http://bugs.debian.org/633582> */
1556
/* Re-raise priviliges */
1560
perror_plus("seteuid");
1563
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1564
int seckey_fd = open(seckey, O_RDONLY);
1565
if(seckey_fd == -1){
1566
perror_plus("open");
1568
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1570
perror_plus("fstat");
1572
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1573
ret = fchown(seckey_fd, uid, gid);
1575
perror_plus("fchown");
1579
TEMP_FAILURE_RETRY(close(seckey_fd));
1583
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1584
int pubkey_fd = open(pubkey, O_RDONLY);
1585
if(pubkey_fd == -1){
1586
perror_plus("open");
1588
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1590
perror_plus("fstat");
1592
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1593
ret = fchown(pubkey_fd, uid, gid);
1595
perror_plus("fchown");
1599
TEMP_FAILURE_RETRY(close(pubkey_fd));
1603
/* Lower privileges */
1607
perror_plus("seteuid");
1611
/* Find network hooks and run them */
1613
struct dirent **direntries;
1614
struct dirent *direntry;
1615
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1618
perror_plus("scandir");
2066
/* Re-raise privileges */
2067
ret_errno = raise_privileges();
2070
perror_plus("Failed to raise privileges");
1620
int devnull = open("/dev/null", O_RDONLY);
1621
for(int i = 0; i < numhooks; i++){
1622
direntry = direntries[0];
1623
char *fullname = NULL;
1624
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1626
perror_plus("asprintf");
1629
pid_t hook_pid = fork();
1632
dup2(devnull, STDIN_FILENO);
1634
dup2(STDERR_FILENO, STDOUT_FILENO);
1635
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1637
perror_plus("setenv");
1640
ret = setenv("DEVICE", interface, 1);
1642
perror_plus("setenv");
1645
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1647
perror_plus("setenv");
1650
ret = setenv("MODE", "start", 1);
1652
perror_plus("setenv");
1656
ret = asprintf(&delaystring, "%f", delay);
1658
perror_plus("asprintf");
1661
ret = setenv("DELAY", delaystring, 1);
1664
perror_plus("setenv");
1668
ret = execl(fullname, direntry->d_name, "start", NULL);
1669
perror_plus("execl");
1672
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1673
perror_plus("waitpid");
1677
if(WIFEXITED(status)){
1678
if(WEXITSTATUS(status) != 0){
1679
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1680
" with status %d\n", direntry->d_name,
1681
WEXITSTATUS(status));
1685
} else if(WIFSIGNALED(status)){
1686
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1687
" signal %d\n", direntry->d_name,
1692
fprintf_plus(stderr, "Warning: network hook \"%s\" crashed\n",
2074
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2075
int seckey_fd = open(seckey, O_RDONLY);
2076
if(seckey_fd == -1){
2077
perror_plus("open");
2079
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2081
perror_plus("fstat");
2083
if(S_ISREG(st.st_mode)
2084
and st.st_uid == 0 and st.st_gid == 0){
2085
ret = fchown(seckey_fd, uid, gid);
2087
perror_plus("fchown");
2091
TEMP_FAILURE_RETRY(close(seckey_fd));
2095
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2096
int pubkey_fd = open(pubkey, O_RDONLY);
2097
if(pubkey_fd == -1){
2098
perror_plus("open");
2100
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2102
perror_plus("fstat");
2104
if(S_ISREG(st.st_mode)
2105
and st.st_uid == 0 and st.st_gid == 0){
2106
ret = fchown(pubkey_fd, uid, gid);
2108
perror_plus("fchown");
2112
TEMP_FAILURE_RETRY(close(pubkey_fd));
2116
/* Lower privileges */
2117
ret_errno = lower_privileges();
2120
perror_plus("Failed to lower privileges");
2125
/* Remove invalid interface names (except "none") */
2127
char *interface = NULL;
2128
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2130
if(strcmp(interface, "none") != 0
2131
and if_nametoindex(interface) == 0){
2132
if(interface[0] != '\0'){
2133
fprintf_plus(stderr, "Not using nonexisting interface"
2134
" \"%s\"\n", interface);
2136
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2142
/* Run network hooks */
2144
if(mc.interfaces != NULL){
2145
interfaces_hooks = malloc(mc.interfaces_size);
2146
if(interfaces_hooks == NULL){
2147
perror_plus("malloc");
2150
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2151
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2153
run_network_hooks("start", interfaces_hooks != NULL ?
2154
interfaces_hooks : "", delay);
1708
2158
avahi_set_log_function(empty_log);
1711
if(interface[0] == '\0'){
1712
struct dirent **direntries;
1713
/* First look for interfaces that are up */
1714
ret = scandir(sys_class_net, &direntries, up_interface,
1717
/* No up interfaces, look for any good interfaces */
1719
ret = scandir(sys_class_net, &direntries, good_interface,
1723
/* Pick the first interface returned */
1724
interface = strdup(direntries[0]->d_name);
1726
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1728
if(interface == NULL){
1729
perror_plus("malloc");
1731
exitcode = EXIT_FAILURE;
1737
fprintf_plus(stderr, "Could not find a network interface\n");
1738
exitcode = EXIT_FAILURE;
1743
2161
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1744
2162
from the signal handler */
1745
2163
/* Initialize the pseudo-RNG for Avahi */
1746
2164
srand((unsigned int) time(NULL));
1747
mc.simple_poll = avahi_simple_poll_new();
1748
if(mc.simple_poll == NULL){
1749
fprintf_plus(stderr, "Avahi: Failed to create simple poll object.\n");
2165
simple_poll = avahi_simple_poll_new();
2166
if(simple_poll == NULL){
2167
fprintf_plus(stderr,
2168
"Avahi: Failed to create simple poll object.\n");
1750
2169
exitcode = EX_UNAVAILABLE;
1817
/* If the interface is down, bring it up */
1818
if(strcmp(interface, "none") != 0){
1819
if_index = (AvahiIfIndex) if_nametoindex(interface);
1821
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1822
exitcode = EX_UNAVAILABLE;
1830
/* Re-raise priviliges */
1834
perror_plus("seteuid");
1838
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1839
messages about the network interface to mess up the prompt */
1840
ret = klogctl(8, NULL, 5);
1841
bool restore_loglevel = true;
1843
restore_loglevel = false;
1844
perror_plus("klogctl");
1846
#endif /* __linux__ */
1848
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1850
perror_plus("socket");
1851
exitcode = EX_OSERR;
1853
if(restore_loglevel){
1854
ret = klogctl(7, NULL, 0);
1856
perror_plus("klogctl");
1859
#endif /* __linux__ */
1860
/* Lower privileges */
1864
perror_plus("seteuid");
1868
strcpy(network.ifr_name, interface);
1869
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1871
perror_plus("ioctl SIOCGIFFLAGS");
1873
if(restore_loglevel){
1874
ret = klogctl(7, NULL, 0);
1876
perror_plus("klogctl");
1879
#endif /* __linux__ */
1880
exitcode = EX_OSERR;
1881
/* Lower privileges */
1885
perror_plus("seteuid");
1889
if((network.ifr_flags & IFF_UP) == 0){
1890
network.ifr_flags |= IFF_UP;
1891
take_down_interface = true;
1892
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1894
take_down_interface = false;
1895
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1896
exitcode = EX_OSERR;
1898
if(restore_loglevel){
1899
ret = klogctl(7, NULL, 0);
1901
perror_plus("klogctl");
2236
/* If no interfaces were specified, make a list */
2237
if(mc.interfaces == NULL){
2238
struct dirent **direntries;
2239
/* Look for any good interfaces */
2240
ret = scandir(sys_class_net, &direntries, good_interface,
2243
/* Add all found interfaces to interfaces list */
2244
for(int i = 0; i < ret; ++i){
2245
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2246
direntries[i]->d_name);
2249
perror_plus("argz_add");
2253
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2254
direntries[i]->d_name);
2260
fprintf_plus(stderr, "Could not find a network interface\n");
2261
exitcode = EXIT_FAILURE;
2266
/* Bring up interfaces which are down, and remove any "none"s */
2268
char *interface = NULL;
2269
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2271
/* If interface name is "none", stop bringing up interfaces.
2272
Also remove all instances of "none" from the list */
2273
if(strcmp(interface, "none") == 0){
2274
argz_delete(&mc.interfaces, &mc.interfaces_size,
2277
while((interface = argz_next(mc.interfaces,
2278
mc.interfaces_size, interface))){
2279
if(strcmp(interface, "none") == 0){
2280
argz_delete(&mc.interfaces, &mc.interfaces_size,
1904
#endif /* __linux__ */
1905
/* Lower privileges */
1909
perror_plus("seteuid");
1914
/* Sleep checking until interface is running.
1915
Check every 0.25s, up to total time of delay */
1916
for(int i=0; i < delay * 4; i++){
1917
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1919
perror_plus("ioctl SIOCGIFFLAGS");
1920
} else if(network.ifr_flags & IFF_RUNNING){
1923
struct timespec sleeptime = { .tv_nsec = 250000000 };
1924
ret = nanosleep(&sleeptime, NULL);
1925
if(ret == -1 and errno != EINTR){
1926
perror_plus("nanosleep");
1929
if(not take_down_interface){
1930
/* We won't need the socket anymore */
1931
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1933
perror_plus("close");
1937
if(restore_loglevel){
1938
/* Restores kernel loglevel to default */
1939
ret = klogctl(7, NULL, 0);
1941
perror_plus("klogctl");
1944
#endif /* __linux__ */
1945
/* Lower privileges */
1947
if(take_down_interface){
1948
/* Lower privileges */
1951
perror_plus("seteuid");
1954
/* Lower privileges permanently */
1957
perror_plus("setuid");
2287
bool interface_was_up = interface_is_up(interface);
2288
errno = bring_up_interface(interface, delay);
2289
if(not interface_was_up){
2291
perror_plus("Failed to bring up interface");
2293
errno = argz_add(&interfaces_to_take_down,
2294
&interfaces_to_take_down_size,
2297
perror_plus("argz_add");
2302
if(debug and (interfaces_to_take_down == NULL)){
2303
fprintf_plus(stderr, "No interfaces were brought up\n");
2307
/* If we only got one interface, explicitly use only that one */
2308
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2310
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2313
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1966
ret = init_gnutls_global(pubkey, seckey);
2320
ret = init_gnutls_global(pubkey, seckey, &mc);
1968
2322
fprintf_plus(stderr, "init_gnutls_global failed\n");
1969
2323
exitcode = EX_UNAVAILABLE;
2167
/* XXX run network hooks "stop" here */
2169
/* Take down the network interface */
2170
if(take_down_interface){
2171
/* Re-raise priviliges */
2175
perror_plus("seteuid");
2534
/* Re-raise privileges */
2536
ret_errno = raise_privileges();
2538
perror_plus("Failed to raise privileges");
2541
/* Run network hooks */
2542
run_network_hooks("stop", interfaces_hooks != NULL ?
2543
interfaces_hooks : "", delay);
2545
/* Take down the network interfaces which were brought up */
2547
char *interface = NULL;
2548
while((interface=argz_next(interfaces_to_take_down,
2549
interfaces_to_take_down_size,
2551
ret_errno = take_down_interface(interface);
2554
perror_plus("Failed to take down interface");
2557
if(debug and (interfaces_to_take_down == NULL)){
2558
fprintf_plus(stderr, "No interfaces needed to be taken"
2178
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2180
perror_plus("ioctl SIOCGIFFLAGS");
2181
} else if(network.ifr_flags & IFF_UP){
2182
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2183
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2185
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2188
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2190
perror_plus("close");
2192
/* Lower privileges permanently */
2196
perror_plus("setuid");
2563
ret_errno = lower_privileges_permanently();
2565
perror_plus("Failed to lower privileges permanently");
2569
free(interfaces_to_take_down);
2570
free(interfaces_hooks);
2201
2572
/* Removes the GPGME temp directory and all files inside */
2202
if(tempdir_created){
2573
if(tempdir != NULL){
2203
2574
struct dirent **direntries = NULL;
2204
2575
struct dirent *direntry = NULL;
2205
2576
int numentries = scandir(tempdir, &direntries, notdotentries,
2207
if (numentries > 0){
2208
2579
for(int i = 0; i < numentries; i++){
2209
2580
direntry = direntries[i];
2210
2581
char *fullname = NULL;