641
500
__attribute__((unused)) const char *txt){}
643
502
/* Called when a Mandos server is found */
644
__attribute__((nonnull, warn_unused_result))
645
static int start_mandos_communication(const char *ip, in_port_t port,
503
static int start_mandos_communication(const char *ip, uint16_t port,
646
504
AvahiIfIndex if_index,
647
int af, mandos_context *mc){
648
int ret, tcp_sd = -1;
650
struct sockaddr_storage to;
507
union { struct sockaddr in; struct sockaddr_in6 in6; } to;
651
508
char *buffer = NULL;
652
char *decrypted_buffer = NULL;
509
char *decrypted_buffer;
653
510
size_t buffer_length = 0;
654
511
size_t buffer_capacity = 0;
512
ssize_t decrypted_buffer_size;
515
char interface[IF_NAMESIZE];
657
516
gnutls_session_t session;
658
int pf; /* Protocol family */
675
fprintf_plus(stderr, "Bad address family: %d\n", af);
680
/* If the interface is specified and we have a list of interfaces */
681
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
682
/* Check if the interface is one of the interfaces we are using */
685
char *interface = NULL;
686
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
688
if(if_nametoindex(interface) == (unsigned int)if_index){
695
/* This interface does not match any in the list, so we don't
696
connect to the server */
698
char interface[IF_NAMESIZE];
699
if(if_indextoname((unsigned int)if_index, interface) == NULL){
700
perror_plus("if_indextoname");
702
fprintf_plus(stderr, "Skipping server on non-used interface"
704
if_indextoname((unsigned int)if_index,
518
ret = init_gnutls_session (mc, &session);
524
fprintf(stderr, "Setting up a tcp connection to %s, port %" PRIu16
528
tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);
535
if(if_indextoname((unsigned int)if_index, interface) == NULL){
536
perror("if_indextoname");
712
ret = init_gnutls_session(&session, mc);
718
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
719
PRIuMAX "\n", ip, (uintmax_t)port);
722
tcp_sd = socket(pf, SOCK_STREAM, 0);
725
perror_plus("socket");
539
fprintf(stderr, "Binding to interface %s\n", interface);
735
542
memset(&to, 0, sizeof(to));
737
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
738
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
740
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
745
perror_plus("inet_pton");
543
to.in6.sin6_family = AF_INET6;
544
/* It would be nice to have a way to detect if we were passed an
545
IPv4 address here. Now we assume an IPv6 address. */
546
ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);
751
fprintf_plus(stderr, "Bad address: %s\n", ip);
756
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
757
if(IN6_IS_ADDR_LINKLOCAL
758
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
759
if(if_index == AVAHI_IF_UNSPEC){
760
fprintf_plus(stderr, "An IPv6 link-local address is"
761
" incomplete without a network interface\n");
765
/* Set the network interface number as scope */
766
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
769
((struct sockaddr_in *)&to)->sin_port = htons(port);
552
fprintf(stderr, "Bad address: %s\n", ip);
555
to.in6.sin6_port = htons(port); /* Spurious warning */
557
to.in6.sin6_scope_id = (uint32_t)if_index;
778
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
779
char interface[IF_NAMESIZE];
780
if(if_indextoname((unsigned int)if_index, interface) == NULL){
781
perror_plus("if_indextoname");
783
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
784
"\n", ip, interface, (uintmax_t)port);
560
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
562
char addrstr[INET6_ADDRSTRLEN] = "";
563
if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,
564
sizeof(addrstr)) == NULL){
567
if(strcmp(addrstr, ip) != 0){
568
fprintf(stderr, "Canonical address form: %s\n", addrstr);
787
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
788
ip, (uintmax_t)port);
790
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
791
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
793
ret = getnameinfo((struct sockaddr *)&to,
794
sizeof(struct sockaddr_in6),
795
addrstr, sizeof(addrstr), NULL, 0,
798
ret = getnameinfo((struct sockaddr *)&to,
799
sizeof(struct sockaddr_in),
800
addrstr, sizeof(addrstr), NULL, 0,
803
if(ret == EAI_SYSTEM){
804
perror_plus("getnameinfo");
805
} else if(ret != 0) {
806
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
807
} else if(strcmp(addrstr, ip) != 0){
808
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
818
ret = connect(tcp_sd, (struct sockaddr *)&to,
819
sizeof(struct sockaddr_in6));
821
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
822
sizeof(struct sockaddr_in));
825
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
827
perror_plus("connect");
573
ret = connect(tcp_sd, &to.in, sizeof(to));
838
579
const char *out = mandos_protocol_version;
841
582
size_t out_size = strlen(out);
842
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
843
out_size - written));
846
perror_plus("write");
583
ret = TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
584
out_size - written));
850
590
written += (size_t)ret;
851
591
if(written < out_size){
854
if(out == mandos_protocol_version){
594
if (out == mandos_protocol_version){
869
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
877
/* This casting via intptr_t is to eliminate warning about casting
878
an int to a pointer type. This is exactly how the GnuTLS Guile
879
function "set-session-transport-fd!" does it. */
880
gnutls_transport_set_ptr(session,
881
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
889
ret = gnutls_handshake(session);
604
fprintf(stderr, "Establishing TLS session with %s\n", ip);
607
gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);
610
ret = gnutls_handshake (session);
894
611
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
896
if(ret != GNUTLS_E_SUCCESS){
613
if (ret != GNUTLS_E_SUCCESS){
898
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
615
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
905
622
/* Read OpenPGP packet that contains the wanted password */
908
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
625
fprintf(stderr, "Retrieving pgp encrypted password from %s\n",
919
buffer_capacity = incbuffer(&buffer, buffer_length,
921
if(buffer_capacity == 0){
923
perror_plus("incbuffer");
933
sret = gnutls_record_recv(session, buffer+buffer_length,
630
buffer_capacity = adjustbuffer(&buffer, buffer_length,
632
if (buffer_capacity == 0){
633
perror("adjustbuffer");
638
ret = gnutls_record_recv(session, buffer+buffer_length,
940
645
case GNUTLS_E_INTERRUPTED:
941
646
case GNUTLS_E_AGAIN:
943
648
case GNUTLS_E_REHANDSHAKE:
945
ret = gnutls_handshake(session);
650
ret = gnutls_handshake (session);
951
651
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
953
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
653
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
961
fprintf_plus(stderr, "Unknown error while reading data from"
962
" encrypted session with Mandos server\n");
963
gnutls_bye(session, GNUTLS_SHUT_RDWR);
660
fprintf(stderr, "Unknown error while reading data from"
661
" encrypted session with Mandos server\n");
663
gnutls_bye (session, GNUTLS_SHUT_RDWR);
968
buffer_length += (size_t) sret;
667
buffer_length += (size_t) ret;
973
fprintf_plus(stderr, "Closing TLS session\n");
982
ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);
987
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
989
if(buffer_length > 0){
990
ssize_t decrypted_buffer_size;
991
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
992
&decrypted_buffer, mc);
993
if(decrypted_buffer_size >= 0){
672
fprintf(stderr, "Closing TLS session\n");
675
gnutls_bye (session, GNUTLS_SHUT_RDWR);
677
if (buffer_length > 0){
678
decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,
681
if (decrypted_buffer_size >= 0){
996
683
while(written < (size_t) decrypted_buffer_size){
1002
ret = (int)fwrite(decrypted_buffer + written, 1,
1003
(size_t)decrypted_buffer_size - written,
684
ret = (int)fwrite (decrypted_buffer + written, 1,
685
(size_t)decrypted_buffer_size - written,
1005
687
if(ret == 0 and ferror(stdout)){
1008
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
689
fprintf(stderr, "Error writing encrypted data: %s\n",
1014
695
written += (size_t)ret;
697
free(decrypted_buffer);
1020
705
/* Shutdown procedure */
1025
free(decrypted_buffer);
1028
ret = (int)TEMP_FAILURE_RETRY(close(tcp_sd));
1034
perror_plus("close");
1036
gnutls_deinit(session);
709
ret = TEMP_FAILURE_RETRY(close(tcp_sd));
713
gnutls_deinit (session);
1046
__attribute__((nonnull))
1047
717
static void resolve_callback(AvahiSServiceResolver *r,
1048
718
AvahiIfIndex interface,
1049
AvahiProtocol proto,
719
AVAHI_GCC_UNUSED AvahiProtocol protocol,
1050
720
AvahiResolverEvent event,
1051
721
const char *name,
1052
722
const char *type,
1160
805
case AVAHI_BROWSER_ALL_FOR_NOW:
1161
806
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1163
fprintf_plus(stderr, "No Mandos server found, still"
808
fprintf(stderr, "No Mandos server found, still searching...\n");
1170
/* Signal handler that stops main loop after SIGTERM */
1171
static void handle_sigterm(int sig){
1176
signal_received = sig;
1177
int old_errno = errno;
1178
/* set main loop to exit */
1179
if(simple_poll != NULL){
1180
avahi_simple_poll_quit(simple_poll);
1185
__attribute__((nonnull, warn_unused_result))
1186
bool get_flags(const char *ifname, struct ifreq *ifr){
1190
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1193
perror_plus("socket");
1197
strcpy(ifr->ifr_name, ifname);
1198
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1202
perror_plus("ioctl SIOCGIFFLAGS");
1210
__attribute__((nonnull, warn_unused_result))
1211
bool good_flags(const char *ifname, const struct ifreq *ifr){
1213
/* Reject the loopback device */
1214
if(ifr->ifr_flags & IFF_LOOPBACK){
1216
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1221
/* Accept point-to-point devices only if connect_to is specified */
1222
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1224
fprintf_plus(stderr, "Accepting point-to-point interface"
1225
" \"%s\"\n", ifname);
1229
/* Otherwise, reject non-broadcast-capable devices */
1230
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1232
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1233
" \"%s\"\n", ifname);
1237
/* Reject non-ARP interfaces (including dummy interfaces) */
1238
if(ifr->ifr_flags & IFF_NOARP){
1240
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1246
/* Accept this device */
1248
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1254
* This function determines if a directory entry in /sys/class/net
1255
* corresponds to an acceptable network device.
1256
* (This function is passed to scandir(3) as a filter function.)
1258
__attribute__((nonnull, warn_unused_result))
1259
int good_interface(const struct dirent *if_entry){
1260
if(if_entry->d_name[0] == '.'){
1265
if(not get_flags(if_entry->d_name, &ifr)){
1267
fprintf_plus(stderr, "Failed to get flags for interface "
1268
"\"%s\"\n", if_entry->d_name);
1273
if(not good_flags(if_entry->d_name, &ifr)){
1280
* This function determines if a network interface is up.
1282
__attribute__((nonnull, warn_unused_result))
1283
bool interface_is_up(const char *interface){
1285
if(not get_flags(interface, &ifr)){
1287
fprintf_plus(stderr, "Failed to get flags for interface "
1288
"\"%s\"\n", interface);
1293
return (bool)(ifr.ifr_flags & IFF_UP);
1297
* This function determines if a network interface is running
1299
__attribute__((nonnull, warn_unused_result))
1300
bool interface_is_running(const char *interface){
1302
if(not get_flags(interface, &ifr)){
1304
fprintf_plus(stderr, "Failed to get flags for interface "
1305
"\"%s\"\n", interface);
1310
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1313
__attribute__((nonnull, pure, warn_unused_result))
1314
int notdotentries(const struct dirent *direntry){
1315
/* Skip "." and ".." */
1316
if(direntry->d_name[0] == '.'
1317
and (direntry->d_name[1] == '\0'
1318
or (direntry->d_name[1] == '.'
1319
and direntry->d_name[2] == '\0'))){
1325
/* Is this directory entry a runnable program? */
1326
__attribute__((nonnull, warn_unused_result))
1327
int runnable_hook(const struct dirent *direntry){
1332
if((direntry->d_name)[0] == '\0'){
1337
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1338
"abcdefghijklmnopqrstuvwxyz"
1341
if((direntry->d_name)[sret] != '\0'){
1342
/* Contains non-allowed characters */
1344
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1350
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1353
perror_plus("Could not stat hook");
1357
if(not (S_ISREG(st.st_mode))){
1358
/* Not a regular file */
1360
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1365
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1366
/* Not executable */
1368
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1374
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1380
__attribute__((nonnull, warn_unused_result))
1381
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1382
mandos_context *mc){
1384
struct timespec now;
1385
struct timespec waited_time;
1386
intmax_t block_time;
1389
if(mc->current_server == NULL){
1391
fprintf_plus(stderr, "Wait until first server is found."
1394
ret = avahi_simple_poll_iterate(s, -1);
1397
fprintf_plus(stderr, "Check current_server if we should run"
1400
/* the current time */
1401
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1403
perror_plus("clock_gettime");
1406
/* Calculating in ms how long time between now and server
1407
who we visted longest time ago. Now - last seen. */
1408
waited_time.tv_sec = (now.tv_sec
1409
- mc->current_server->last_seen.tv_sec);
1410
waited_time.tv_nsec = (now.tv_nsec
1411
- mc->current_server->last_seen.tv_nsec);
1412
/* total time is 10s/10,000ms.
1413
Converting to s from ms by dividing by 1,000,
1414
and ns to ms by dividing by 1,000,000. */
1415
block_time = ((retry_interval
1416
- ((intmax_t)waited_time.tv_sec * 1000))
1417
- ((intmax_t)waited_time.tv_nsec / 1000000));
1420
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1424
if(block_time <= 0){
1425
ret = start_mandos_communication(mc->current_server->ip,
1426
mc->current_server->port,
1427
mc->current_server->if_index,
1428
mc->current_server->af, mc);
1430
avahi_simple_poll_quit(s);
1433
ret = clock_gettime(CLOCK_MONOTONIC,
1434
&mc->current_server->last_seen);
1436
perror_plus("clock_gettime");
1439
mc->current_server = mc->current_server->next;
1440
block_time = 0; /* Call avahi to find new Mandos
1441
servers, but don't block */
1444
ret = avahi_simple_poll_iterate(s, (int)block_time);
1447
if(ret > 0 or errno != EINTR){
1448
return (ret != 1) ? ret : 0;
1454
/* Set effective uid to 0, return errno */
1455
__attribute__((warn_unused_result))
1456
error_t raise_privileges(void){
1457
error_t old_errno = errno;
1458
error_t ret_errno = 0;
1459
if(seteuid(0) == -1){
1466
/* Set effective and real user ID to 0. Return errno. */
1467
__attribute__((warn_unused_result))
1468
error_t raise_privileges_permanently(void){
1469
error_t old_errno = errno;
1470
error_t ret_errno = raise_privileges();
1475
if(setuid(0) == -1){
1482
/* Set effective user ID to unprivileged saved user ID */
1483
__attribute__((warn_unused_result))
1484
error_t lower_privileges(void){
1485
error_t old_errno = errno;
1486
error_t ret_errno = 0;
1487
if(seteuid(uid) == -1){
1494
/* Lower privileges permanently */
1495
__attribute__((warn_unused_result))
1496
error_t lower_privileges_permanently(void){
1497
error_t old_errno = errno;
1498
error_t ret_errno = 0;
1499
if(setuid(uid) == -1){
1506
__attribute__((nonnull))
1507
void run_network_hooks(const char *mode, const char *interface,
1509
struct dirent **direntries = NULL;
1510
if(hookdir_fd == -1){
1511
hookdir_fd = open(hookdir, O_RDONLY);
1512
if(hookdir_fd == -1){
1513
if(errno == ENOENT){
1515
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1516
" found\n", hookdir);
1519
perror_plus("open");
1525
#if __GLIBC_PREREQ(2, 15)
1526
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1527
runnable_hook, alphasort);
1528
#else /* not __GLIBC_PREREQ(2, 15) */
1529
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1531
#endif /* not __GLIBC_PREREQ(2, 15) */
1532
#else /* not __GLIBC__ */
1533
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1535
#endif /* not __GLIBC__ */
1537
perror_plus("scandir");
1540
struct dirent *direntry;
1542
int devnull = open("/dev/null", O_RDONLY);
1543
for(int i = 0; i < numhooks; i++){
1544
direntry = direntries[i];
1546
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1549
pid_t hook_pid = fork();
1552
/* Raise privileges */
1553
errno = raise_privileges_permanently();
1555
perror_plus("Failed to raise privileges");
1562
perror_plus("setgid");
1565
/* Reset supplementary groups */
1567
ret = setgroups(0, NULL);
1569
perror_plus("setgroups");
1572
ret = dup2(devnull, STDIN_FILENO);
1574
perror_plus("dup2(devnull, STDIN_FILENO)");
1577
ret = close(devnull);
1579
perror_plus("close");
1582
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1584
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1587
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1589
perror_plus("setenv");
1592
ret = setenv("DEVICE", interface, 1);
1594
perror_plus("setenv");
1597
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1599
perror_plus("setenv");
1602
ret = setenv("MODE", mode, 1);
1604
perror_plus("setenv");
1608
ret = asprintf(&delaystring, "%f", (double)delay);
1610
perror_plus("asprintf");
1613
ret = setenv("DELAY", delaystring, 1);
1616
perror_plus("setenv");
1620
if(connect_to != NULL){
1621
ret = setenv("CONNECT", connect_to, 1);
1623
perror_plus("setenv");
1627
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1629
perror_plus("openat");
1630
_exit(EXIT_FAILURE);
1632
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1633
perror_plus("close");
1634
_exit(EXIT_FAILURE);
1636
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1638
perror_plus("fexecve");
1639
_exit(EXIT_FAILURE);
1643
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1644
perror_plus("waitpid");
1647
if(WIFEXITED(status)){
1648
if(WEXITSTATUS(status) != 0){
1649
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1650
" with status %d\n", direntry->d_name,
1651
WEXITSTATUS(status));
1654
} else if(WIFSIGNALED(status)){
1655
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1656
" signal %d\n", direntry->d_name,
1660
fprintf_plus(stderr, "Warning: network hook \"%s\""
1661
" crashed\n", direntry->d_name);
1666
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1671
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1672
perror_plus("close");
1679
__attribute__((nonnull, warn_unused_result))
1680
error_t bring_up_interface(const char *const interface,
1682
error_t old_errno = errno;
1684
struct ifreq network;
1685
unsigned int if_index = if_nametoindex(interface);
1687
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1697
if(not interface_is_up(interface)){
1698
error_t ret_errno = 0, ioctl_errno = 0;
1699
if(not get_flags(interface, &network)){
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1702
"\"%s\"\n", interface);
1706
network.ifr_flags |= IFF_UP; /* set flag */
1708
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1711
perror_plus("socket");
1717
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1719
perror_plus("close");
1726
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1730
/* Raise privileges */
1731
ret_errno = raise_privileges();
1734
perror_plus("Failed to raise privileges");
1739
bool restore_loglevel = false;
1741
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1742
messages about the network interface to mess up the prompt */
1743
ret_linux = klogctl(8, NULL, 5);
1744
if(ret_linux == -1){
1745
perror_plus("klogctl");
1747
restore_loglevel = true;
1750
#endif /* __linux__ */
1751
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1752
ioctl_errno = errno;
1754
if(restore_loglevel){
1755
ret_linux = klogctl(7, NULL, 0);
1756
if(ret_linux == -1){
1757
perror_plus("klogctl");
1760
#endif /* __linux__ */
1762
/* If raise_privileges() succeeded above */
1764
/* Lower privileges */
1765
ret_errno = lower_privileges();
1768
perror_plus("Failed to lower privileges");
1772
/* Close the socket */
1773
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1775
perror_plus("close");
1778
if(ret_setflags == -1){
1779
errno = ioctl_errno;
1780
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1785
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1789
/* Sleep checking until interface is running.
1790
Check every 0.25s, up to total time of delay */
1791
for(int i=0; i < delay * 4; i++){
1792
if(interface_is_running(interface)){
1795
struct timespec sleeptime = { .tv_nsec = 250000000 };
1796
ret = nanosleep(&sleeptime, NULL);
1797
if(ret == -1 and errno != EINTR){
1798
perror_plus("nanosleep");
1806
__attribute__((nonnull, warn_unused_result))
1807
error_t take_down_interface(const char *const interface){
1808
error_t old_errno = errno;
1809
struct ifreq network;
1810
unsigned int if_index = if_nametoindex(interface);
1812
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1816
if(interface_is_up(interface)){
1817
error_t ret_errno = 0, ioctl_errno = 0;
1818
if(not get_flags(interface, &network) and debug){
1820
fprintf_plus(stderr, "Failed to get flags for interface "
1821
"\"%s\"\n", interface);
1825
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1827
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1830
perror_plus("socket");
1836
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1840
/* Raise privileges */
1841
ret_errno = raise_privileges();
1844
perror_plus("Failed to raise privileges");
1847
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1848
ioctl_errno = errno;
1850
/* If raise_privileges() succeeded above */
1852
/* Lower privileges */
1853
ret_errno = lower_privileges();
1856
perror_plus("Failed to lower privileges");
1860
/* Close the socket */
1861
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1863
perror_plus("close");
1866
if(ret_setflags == -1){
1867
errno = ioctl_errno;
1868
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1873
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1881
814
int main(int argc, char *argv[]){
1882
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1883
.priority = "SECURE256:!CTYPE-X.509:"
1884
"+CTYPE-OPENPGP", .current_server = NULL,
1885
.interfaces = NULL, .interfaces_size = 0 };
1886
AvahiSServiceBrowser *sb = NULL;
1891
int exitcode = EXIT_SUCCESS;
1892
char *interfaces_to_take_down = NULL;
1893
size_t interfaces_to_take_down_size = 0;
1894
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1895
char old_tempdir[] = "/tmp/mandosXXXXXX";
1896
char *tempdir = NULL;
1897
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1898
const char *seckey = PATHDIR "/" SECKEY;
1899
const char *pubkey = PATHDIR "/" PUBKEY;
1900
char *interfaces_hooks = NULL;
1902
bool gnutls_initialized = false;
1903
bool gpgme_initialized = false;
1905
double retry_interval = 10; /* 10s between trying a server and
1906
retrying the same server again */
1908
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1909
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1914
/* Lower any group privileges we might have, just to be safe */
1918
perror_plus("setgid");
1921
/* Lower user privileges (temporarily) */
1925
perror_plus("seteuid");
1933
struct argp_option options[] = {
1934
{ .name = "debug", .key = 128,
1935
.doc = "Debug mode", .group = 3 },
1936
{ .name = "connect", .key = 'c',
1937
.arg = "ADDRESS:PORT",
1938
.doc = "Connect directly to a specific Mandos server",
1940
{ .name = "interface", .key = 'i',
1942
.doc = "Network interface that will be used to search for"
1945
{ .name = "seckey", .key = 's',
1947
.doc = "OpenPGP secret key file base name",
1949
{ .name = "pubkey", .key = 'p',
1951
.doc = "OpenPGP public key file base name",
1953
{ .name = "dh-bits", .key = 129,
1955
.doc = "Bit length of the prime number used in the"
1956
" Diffie-Hellman key exchange",
1958
{ .name = "priority", .key = 130,
1960
.doc = "GnuTLS priority string for the TLS handshake",
1962
{ .name = "delay", .key = 131,
1964
.doc = "Maximum delay to wait for interface startup",
1966
{ .name = "retry", .key = 132,
1968
.doc = "Retry interval used when denied by the Mandos server",
1970
{ .name = "network-hook-dir", .key = 133,
1972
.doc = "Directory where network hooks are located",
1975
* These reproduce what we would get without ARGP_NO_HELP
1977
{ .name = "help", .key = '?',
1978
.doc = "Give this help list", .group = -1 },
1979
{ .name = "usage", .key = -3,
1980
.doc = "Give a short usage message", .group = -1 },
1981
{ .name = "version", .key = 'V',
1982
.doc = "Print program version", .group = -1 },
1986
error_t parse_opt(int key, char *arg,
1987
struct argp_state *state){
815
AvahiSServiceBrowser *sb = NULL;
818
int exitcode = EXIT_SUCCESS;
819
const char *interface = "eth0";
820
struct ifreq network;
824
char *connect_to = NULL;
825
char tempdir[] = "/tmp/mandosXXXXXX";
826
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
827
const char *seckey = PATHDIR "/" SECKEY;
828
const char *pubkey = PATHDIR "/" PUBKEY;
830
mandos_context mc = { .simple_poll = NULL, .server = NULL,
831
.dh_bits = 1024, .priority = "SECURE256"};
832
bool gnutls_initalized = false;
833
bool pgpme_initalized = false;
836
struct argp_option options[] = {
837
{ .name = "debug", .key = 128,
838
.doc = "Debug mode", .group = 3 },
839
{ .name = "connect", .key = 'c',
841
.doc = "Connect directly to a sepcified mandos server",
843
{ .name = "interface", .key = 'i',
845
.doc = "Interface that Avahi will conntect through",
847
{ .name = "seckey", .key = 's',
849
.doc = "Secret openpgp key for gnutls authentication",
851
{ .name = "pubkey", .key = 'p',
853
.doc = "Public openpgp key for gnutls authentication",
855
{ .name = "dh-bits", .key = 129,
857
.doc = "dh-bits to use in gnutls communication",
859
{ .name = "priority", .key = 130,
861
.doc = "GNUTLS priority", .group = 1 },
866
error_t parse_opt (int key, char *arg,
867
struct argp_state *state) {
868
/* Get the INPUT argument from `argp_parse', which we know is
869
a pointer to our plugin list pointer. */
888
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
902
return ARGP_ERR_UNKNOWN;
907
struct argp argp = { .options = options, .parser = parse_opt,
909
.doc = "Mandos client -- Get and decrypt"
910
" passwords from mandos server" };
911
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
912
if (ret == ARGP_ERR_UNKNOWN){
913
fprintf(stderr, "Unknown error while parsing arguments\n");
914
exitcode = EXIT_FAILURE;
919
ret = init_gnutls_global(&mc, pubkey, seckey);
921
fprintf(stderr, "init_gnutls_global failed\n");
922
exitcode = EXIT_FAILURE;
925
gnutls_initalized = true;
928
if(mkdtemp(tempdir) == NULL){
934
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
935
fprintf(stderr, "pgpme_initalized failed\n");
936
exitcode = EXIT_FAILURE;
939
pgpme_initalized = true;
942
/* If the interface is down, bring it up */
944
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
947
exitcode = EXIT_FAILURE;
950
strcpy(network.ifr_name, interface);
951
ret = ioctl(sd, SIOCGIFFLAGS, &network);
953
perror("ioctl SIOCGIFFLAGS");
954
exitcode = EXIT_FAILURE;
957
if((network.ifr_flags & IFF_UP) == 0){
958
network.ifr_flags |= IFF_UP;
959
ret = ioctl(sd, SIOCSIFFLAGS, &network);
961
perror("ioctl SIOCSIFFLAGS");
962
exitcode = EXIT_FAILURE;
966
ret = TEMP_FAILURE_RETRY(close(sd));
985
if_index = (AvahiIfIndex) if_nametoindex(interface);
987
fprintf(stderr, "No such interface: \"%s\"\n", interface);
991
if(connect_to != NULL){
992
/* Connect directly, do not use Zeroconf */
993
/* (Mainly meant for debugging) */
994
char *address = strrchr(connect_to, ':');
996
fprintf(stderr, "No colon in address\n");
997
exitcode = EXIT_FAILURE;
1990
case 128: /* --debug */
1993
case 'c': /* --connect */
1996
case 'i': /* --interface */
1997
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2000
argp_error(state, "%s", strerror(ret_errno));
2003
case 's': /* --seckey */
2006
case 'p': /* --pubkey */
2009
case 129: /* --dh-bits */
2011
tmpmax = strtoimax(arg, &tmp, 10);
2012
if(errno != 0 or tmp == arg or *tmp != '\0'
2013
or tmpmax != (typeof(mc.dh_bits))tmpmax){
2014
argp_error(state, "Bad number of DH bits");
2016
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
2018
case 130: /* --priority */
2021
case 131: /* --delay */
2023
delay = strtof(arg, &tmp);
2024
if(errno != 0 or tmp == arg or *tmp != '\0'){
2025
argp_error(state, "Bad delay");
2027
case 132: /* --retry */
2029
retry_interval = strtod(arg, &tmp);
2030
if(errno != 0 or tmp == arg or *tmp != '\0'
2031
or (retry_interval * 1000) > INT_MAX
2032
or retry_interval < 0){
2033
argp_error(state, "Bad retry interval");
2036
case 133: /* --network-hook-dir */
2040
* These reproduce what we would get without ARGP_NO_HELP
2042
case '?': /* --help */
2043
argp_state_help(state, state->out_stream,
2044
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
2045
& ~(unsigned int)ARGP_HELP_EXIT_OK);
2046
case -3: /* --usage */
2047
argp_state_help(state, state->out_stream,
2048
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
2049
case 'V': /* --version */
2050
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
2051
exit(argp_err_exit_status);
2054
return ARGP_ERR_UNKNOWN;
2059
struct argp argp = { .options = options, .parser = parse_opt,
2061
.doc = "Mandos client -- Get and decrypt"
2062
" passwords from a Mandos server" };
2063
ret = argp_parse(&argp, argc, argv,
2064
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
2071
perror_plus("argp_parse");
2072
exitcode = EX_OSERR;
2075
exitcode = EX_USAGE;
2081
/* Work around Debian bug #633582:
2082
<http://bugs.debian.org/633582> */
2084
/* Re-raise privileges */
2085
ret_errno = raise_privileges();
2088
perror_plus("Failed to raise privileges");
2092
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2093
int seckey_fd = open(seckey, O_RDONLY);
2094
if(seckey_fd == -1){
2095
perror_plus("open");
2097
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2099
perror_plus("fstat");
2101
if(S_ISREG(st.st_mode)
2102
and st.st_uid == 0 and st.st_gid == 0){
2103
ret = fchown(seckey_fd, uid, gid);
2105
perror_plus("fchown");
2109
TEMP_FAILURE_RETRY(close(seckey_fd));
2113
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2114
int pubkey_fd = open(pubkey, O_RDONLY);
2115
if(pubkey_fd == -1){
2116
perror_plus("open");
2118
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2120
perror_plus("fstat");
2122
if(S_ISREG(st.st_mode)
2123
and st.st_uid == 0 and st.st_gid == 0){
2124
ret = fchown(pubkey_fd, uid, gid);
2126
perror_plus("fchown");
2130
TEMP_FAILURE_RETRY(close(pubkey_fd));
2134
/* Lower privileges */
2135
ret_errno = lower_privileges();
2138
perror_plus("Failed to lower privileges");
2143
/* Remove invalid interface names (except "none") */
2145
char *interface = NULL;
2146
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2148
if(strcmp(interface, "none") != 0
2149
and if_nametoindex(interface) == 0){
2150
if(interface[0] != '\0'){
2151
fprintf_plus(stderr, "Not using nonexisting interface"
2152
" \"%s\"\n", interface);
2154
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2160
/* Run network hooks */
2162
if(mc.interfaces != NULL){
2163
interfaces_hooks = malloc(mc.interfaces_size);
2164
if(interfaces_hooks == NULL){
2165
perror_plus("malloc");
1001
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1003
perror("Bad port number");
1004
exitcode = EXIT_FAILURE;
2168
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2169
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2171
run_network_hooks("start", interfaces_hooks != NULL ?
2172
interfaces_hooks : "", delay);
2176
avahi_set_log_function(empty_log);
2179
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2180
from the signal handler */
2181
/* Initialize the pseudo-RNG for Avahi */
2182
srand((unsigned int) time(NULL));
2183
simple_poll = avahi_simple_poll_new();
2184
if(simple_poll == NULL){
2185
fprintf_plus(stderr,
2186
"Avahi: Failed to create simple poll object.\n");
2187
exitcode = EX_UNAVAILABLE;
2191
sigemptyset(&sigterm_action.sa_mask);
2192
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2194
perror_plus("sigaddset");
2195
exitcode = EX_OSERR;
2198
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2200
perror_plus("sigaddset");
2201
exitcode = EX_OSERR;
2204
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2206
perror_plus("sigaddset");
2207
exitcode = EX_OSERR;
2210
/* Need to check if the handler is SIG_IGN before handling:
2211
| [[info:libc:Initial Signal Actions]] |
2212
| [[info:libc:Basic Signal Handling]] |
2214
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2216
perror_plus("sigaction");
2219
if(old_sigterm_action.sa_handler != SIG_IGN){
2220
ret = sigaction(SIGINT, &sigterm_action, NULL);
2222
perror_plus("sigaction");
2223
exitcode = EX_OSERR;
2227
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2229
perror_plus("sigaction");
2232
if(old_sigterm_action.sa_handler != SIG_IGN){
2233
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2235
perror_plus("sigaction");
2236
exitcode = EX_OSERR;
2240
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2242
perror_plus("sigaction");
2245
if(old_sigterm_action.sa_handler != SIG_IGN){
2246
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2248
perror_plus("sigaction");
2249
exitcode = EX_OSERR;
2254
/* If no interfaces were specified, make a list */
2255
if(mc.interfaces == NULL){
2256
struct dirent **direntries = NULL;
2257
/* Look for any good interfaces */
2258
ret = scandir(sys_class_net, &direntries, good_interface,
2261
/* Add all found interfaces to interfaces list */
2262
for(int i = 0; i < ret; ++i){
2263
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2264
direntries[i]->d_name);
2267
perror_plus("argz_add");
2271
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2272
direntries[i]->d_name);
2280
fprintf_plus(stderr, "Could not find a network interface\n");
2281
exitcode = EXIT_FAILURE;
2286
/* Bring up interfaces which are down, and remove any "none"s */
2288
char *interface = NULL;
2289
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2291
/* If interface name is "none", stop bringing up interfaces.
2292
Also remove all instances of "none" from the list */
2293
if(strcmp(interface, "none") == 0){
2294
argz_delete(&mc.interfaces, &mc.interfaces_size,
2297
while((interface = argz_next(mc.interfaces,
2298
mc.interfaces_size, interface))){
2299
if(strcmp(interface, "none") == 0){
2300
argz_delete(&mc.interfaces, &mc.interfaces_size,
2307
bool interface_was_up = interface_is_up(interface);
2308
errno = bring_up_interface(interface, delay);
2309
if(not interface_was_up){
2311
perror_plus("Failed to bring up interface");
2313
errno = argz_add(&interfaces_to_take_down,
2314
&interfaces_to_take_down_size,
2317
perror_plus("argz_add");
2322
if(debug and (interfaces_to_take_down == NULL)){
2323
fprintf_plus(stderr, "No interfaces were brought up\n");
2327
/* If we only got one interface, explicitly use only that one */
2328
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2330
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2333
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2340
ret = init_gnutls_global(pubkey, seckey, &mc);
2342
fprintf_plus(stderr, "init_gnutls_global failed\n");
2343
exitcode = EX_UNAVAILABLE;
2346
gnutls_initialized = true;
2353
/* Try /run/tmp before /tmp */
2354
tempdir = mkdtemp(run_tempdir);
2355
if(tempdir == NULL and errno == ENOENT){
2357
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2358
run_tempdir, old_tempdir);
2360
tempdir = mkdtemp(old_tempdir);
2362
if(tempdir == NULL){
2363
perror_plus("mkdtemp");
2371
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2372
fprintf_plus(stderr, "init_gpgme failed\n");
2373
exitcode = EX_UNAVAILABLE;
2376
gpgme_initialized = true;
2383
if(connect_to != NULL){
2384
/* Connect directly, do not use Zeroconf */
2385
/* (Mainly meant for debugging) */
2386
char *address = strrchr(connect_to, ':');
2388
if(address == NULL){
2389
fprintf_plus(stderr, "No colon in address\n");
2390
exitcode = EX_USAGE;
2400
tmpmax = strtoimax(address+1, &tmp, 10);
2401
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2402
or tmpmax != (in_port_t)tmpmax){
2403
fprintf_plus(stderr, "Bad port number\n");
2404
exitcode = EX_USAGE;
2412
port = (in_port_t)tmpmax;
2414
/* Colon in address indicates IPv6 */
2416
if(strchr(connect_to, ':') != NULL){
2418
/* Accept [] around IPv6 address - see RFC 5952 */
2419
if(connect_to[0] == '[' and address[-1] == ']')
2427
address = connect_to;
2433
while(not quit_now){
2434
ret = start_mandos_communication(address, port, if_index, af,
2436
if(quit_now or ret == 0){
2440
fprintf_plus(stderr, "Retrying in %d seconds\n",
2441
(int)retry_interval);
2443
sleep((unsigned int)retry_interval);
2447
exitcode = EXIT_SUCCESS;
2458
AvahiServerConfig config;
2459
/* Do not publish any local Zeroconf records */
2460
avahi_server_config_init(&config);
2461
config.publish_hinfo = 0;
2462
config.publish_addresses = 0;
2463
config.publish_workstation = 0;
2464
config.publish_domain = 0;
2466
/* Allocate a new server */
2467
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2468
&config, NULL, NULL, &ret_errno);
2470
/* Free the Avahi configuration data */
2471
avahi_server_config_free(&config);
2474
/* Check if creating the Avahi server object succeeded */
2475
if(mc.server == NULL){
2476
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2477
avahi_strerror(ret_errno));
2478
exitcode = EX_UNAVAILABLE;
2486
/* Create the Avahi service browser */
2487
sb = avahi_s_service_browser_new(mc.server, if_index,
2488
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2489
NULL, 0, browse_callback,
2492
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2493
avahi_strerror(avahi_server_errno(mc.server)));
2494
exitcode = EX_UNAVAILABLE;
2502
/* Run the main loop */
2505
fprintf_plus(stderr, "Starting Avahi loop search\n");
2508
ret = avahi_loop_with_timeout(simple_poll,
2509
(int)(retry_interval * 1000), &mc);
2511
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2512
(ret == 0) ? "successfully" : "with error");
1008
address = connect_to;
1009
ret = start_mandos_communication(address, port, if_index, &mc);
1011
exitcode = EXIT_FAILURE;
1013
exitcode = EXIT_SUCCESS;
1019
avahi_set_log_function(empty_log);
1022
/* Initialize the pseudo-RNG for Avahi */
1023
srand((unsigned int) time(NULL));
1025
/* Allocate main Avahi loop object */
1026
mc.simple_poll = avahi_simple_poll_new();
1027
if (mc.simple_poll == NULL) {
1028
fprintf(stderr, "Avahi: Failed to create simple poll"
1030
exitcode = EXIT_FAILURE;
1035
AvahiServerConfig config;
1036
/* Do not publish any local Zeroconf records */
1037
avahi_server_config_init(&config);
1038
config.publish_hinfo = 0;
1039
config.publish_addresses = 0;
1040
config.publish_workstation = 0;
1041
config.publish_domain = 0;
1043
/* Allocate a new server */
1044
mc.server = avahi_server_new(avahi_simple_poll_get
1045
(mc.simple_poll), &config, NULL,
1048
/* Free the Avahi configuration data */
1049
avahi_server_config_free(&config);
1052
/* Check if creating the Avahi server object succeeded */
1053
if (mc.server == NULL) {
1054
fprintf(stderr, "Failed to create Avahi server: %s\n",
1055
avahi_strerror(error));
1056
exitcode = EXIT_FAILURE;
1060
/* Create the Avahi service browser */
1061
sb = avahi_s_service_browser_new(mc.server, if_index,
1063
"_mandos._tcp", NULL, 0,
1064
browse_callback, &mc);
1066
fprintf(stderr, "Failed to create service browser: %s\n",
1067
avahi_strerror(avahi_server_errno(mc.server)));
1068
exitcode = EXIT_FAILURE;
1072
/* Run the main loop */
1075
fprintf(stderr, "Starting Avahi loop search\n");
1078
avahi_simple_poll_loop(mc.simple_poll);
2518
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2521
/* Cleanup things */
2522
free(mc.interfaces);
2525
avahi_s_service_browser_free(sb);
2527
if(mc.server != NULL)
2528
avahi_server_free(mc.server);
2530
if(simple_poll != NULL)
2531
avahi_simple_poll_free(simple_poll);
2533
if(gnutls_initialized){
2534
gnutls_certificate_free_credentials(mc.cred);
2535
gnutls_global_deinit();
2536
gnutls_dh_params_deinit(mc.dh_params);
2539
if(gpgme_initialized){
2540
gpgme_release(mc.ctx);
2543
/* Cleans up the circular linked list of Mandos servers the client
2545
if(mc.current_server != NULL){
2546
mc.current_server->prev->next = NULL;
2547
while(mc.current_server != NULL){
2548
server *next = mc.current_server->next;
2549
free(mc.current_server);
2550
mc.current_server = next;
2554
/* Re-raise privileges */
2556
ret_errno = raise_privileges();
2559
perror_plus("Failed to raise privileges");
2562
/* Run network hooks */
2563
run_network_hooks("stop", interfaces_hooks != NULL ?
2564
interfaces_hooks : "", delay);
2566
/* Take down the network interfaces which were brought up */
2568
char *interface = NULL;
2569
while((interface=argz_next(interfaces_to_take_down,
2570
interfaces_to_take_down_size,
2572
ret_errno = take_down_interface(interface);
2575
perror_plus("Failed to take down interface");
2578
if(debug and (interfaces_to_take_down == NULL)){
2579
fprintf_plus(stderr, "No interfaces needed to be taken"
2585
ret_errno = lower_privileges_permanently();
2588
perror_plus("Failed to lower privileges permanently");
2592
free(interfaces_to_take_down);
2593
free(interfaces_hooks);
2595
/* Removes the GPGME temp directory and all files inside */
2596
if(tempdir != NULL){
2597
struct dirent **direntries = NULL;
2598
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2600
if(tempdir_fd == -1){
2601
perror_plus("open");
2604
#if __GLIBC_PREREQ(2, 15)
2605
int numentries = scandirat(tempdir_fd, ".", &direntries,
2606
notdotentries, alphasort);
2607
#else /* not __GLIBC_PREREQ(2, 15) */
2608
int numentries = scandir(tempdir, &direntries, notdotentries,
2610
#endif /* not __GLIBC_PREREQ(2, 15) */
2611
#else /* not __GLIBC__ */
2612
int numentries = scandir(tempdir, &direntries, notdotentries,
2614
#endif /* not __GLIBC__ */
2615
if(numentries >= 0){
2616
for(int i = 0; i < numentries; i++){
2617
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2619
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2620
" \"%s\", 0): %s\n", tempdir,
2621
direntries[i]->d_name, strerror(errno));
2625
/* need to clean even if 0 because man page doesn't specify */
2627
if(numentries == -1){
2628
perror_plus("scandir");
2630
ret = rmdir(tempdir);
2631
if(ret == -1 and errno != ENOENT){
2632
perror_plus("rmdir");
2635
TEMP_FAILURE_RETRY(close(tempdir_fd));
2640
sigemptyset(&old_sigterm_action.sa_mask);
2641
old_sigterm_action.sa_handler = SIG_DFL;
2642
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2643
&old_sigterm_action,
2646
perror_plus("sigaction");
2649
ret = raise(signal_received);
2650
} while(ret != 0 and errno == EINTR);
2652
perror_plus("raise");
2655
TEMP_FAILURE_RETRY(pause());
1083
fprintf(stderr, "%s exiting\n", argv[0]);
1086
/* Cleanup things */
1088
avahi_s_service_browser_free(sb);
1090
if (mc.server != NULL)
1091
avahi_server_free(mc.server);
1093
if (mc.simple_poll != NULL)
1094
avahi_simple_poll_free(mc.simple_poll);
1096
if (gnutls_initalized){
1097
gnutls_certificate_free_credentials(mc.cred);
1098
gnutls_global_deinit ();
1101
if(pgpme_initalized){
1102
gpgme_release(mc.ctx);
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1126
ret = unlink(fullname);
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1135
ret = rmdir(tempdir);