62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
64
#include <assert.h> /* assert() */
64
65
#include <errno.h> /* perror(), errno,
65
66
program_invocation_short_name */
66
67
#include <time.h> /* nanosleep(), time(), sleep() */
87
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
88
89
WEXITSTATUS(), WTERMSIG() */
89
90
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
96
93
#include <sys/klog.h> /* klogctl() */
161
159
const char *priority;
163
161
server *current_server;
165
size_t interfaces_size;
166
162
} mandos_context;
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
164
/* global context so signal handler can reach it*/
165
mandos_context mc = { .simple_poll = NULL, .server = NULL,
166
.dh_bits = 1024, .priority = "SECURE256"
167
":!CTYPE-X.509:+CTYPE-OPENPGP",
168
.current_server = NULL };
171
170
sig_atomic_t quit_now = 0;
172
171
int signal_received = 0;
210
209
/* Add server to set of servers to retry periodically */
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
int af, server **current_server){
210
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
214
213
server *new_server = malloc(sizeof(server));
215
214
if(new_server == NULL){
227
226
/* Special case of first server */
228
if(*current_server == NULL){
227
if (mc.current_server == NULL){
229
228
new_server->next = new_server;
230
229
new_server->prev = new_server;
231
*current_server = new_server;
230
mc.current_server = new_server;
232
231
/* Place the new server last in the list */
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
233
new_server->next = mc.current_server;
234
new_server->prev = mc.current_server->prev;
236
235
new_server->prev->next = new_server;
237
(*current_server)->prev = new_server;
236
mc.current_server->prev = new_server;
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
241
240
perror_plus("clock_gettime");
378
377
/* Decrypt data from the cryptotext data buffer to the plaintext
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
379
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
381
380
if(rc != GPG_ERR_NO_ERROR){
382
381
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
382
gpgme_strsource(rc), gpgme_strerror(rc));
384
383
plaintext_length = -1;
386
385
gpgme_decrypt_result_t result;
387
result = gpgme_op_decrypt_result(mc->ctx);
386
result = gpgme_op_decrypt_result(mc.ctx);
388
387
if(result == NULL){
389
388
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
535
534
/* GnuTLS server initialization */
536
ret = gnutls_dh_params_init(&mc->dh_params);
535
ret = gnutls_dh_params_init(&mc.dh_params);
537
536
if(ret != GNUTLS_E_SUCCESS){
538
537
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
538
" initialization: %s\n",
540
539
safer_gnutls_strerror(ret));
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
542
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
544
543
if(ret != GNUTLS_E_SUCCESS){
545
544
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
545
safer_gnutls_strerror(ret));
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
549
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
556
gnutls_certificate_free_credentials(mc->cred);
555
gnutls_certificate_free_credentials(mc.cred);
557
556
gnutls_global_deinit();
558
gnutls_dh_params_deinit(mc->dh_params);
557
gnutls_dh_params_deinit(mc.dh_params);
562
static int init_gnutls_session(gnutls_session_t *session,
561
static int init_gnutls_session(gnutls_session_t *session){
565
563
/* GnuTLS session creation */
662
/* If the interface is specified and we have a list of interfaces */
663
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
664
/* Check if the interface is one of the interfaces we are using */
667
char *interface = NULL;
668
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
670
if(if_nametoindex(interface) == (unsigned int)if_index){
677
/* This interface does not match any in the list, so we don't
678
connect to the server */
680
char interface[IF_NAMESIZE];
681
if(if_indextoname((unsigned int)if_index, interface) == NULL){
682
perror_plus("if_indextoname");
684
fprintf_plus(stderr, "Skipping server on non-used interface"
686
if_indextoname((unsigned int)if_index,
694
ret = init_gnutls_session(&session, mc);
660
ret = init_gnutls_session(&session);
700
666
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
701
PRIuMAX "\n", ip, (uintmax_t)port);
667
PRIu16 "\n", ip, port);
704
670
tcp_sd = socket(pf, SOCK_STREAM, 0);
737
703
if(af == AF_INET6){
738
to.in6.sin6_port = htons(port);
740
#pragma GCC diagnostic push
741
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
704
to.in6.sin6_port = htons(port); /* Spurious warnings from
706
-Wunreachable-code */
743
708
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
744
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower */
746
#pragma GCC diagnostic pop
709
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
748
711
if(if_index == AVAHI_IF_UNSPEC){
749
712
fprintf_plus(stderr, "An IPv6 link-local address is"
750
713
" incomplete without a network interface\n");
769
734
if(if_indextoname((unsigned int)if_index, interface) == NULL){
770
735
perror_plus("if_indextoname");
772
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
773
"\n", ip, interface, (uintmax_t)port);
737
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
738
"\n", ip, interface, port);
776
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
777
ip, (uintmax_t)port);
741
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
779
744
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
780
745
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1071
1033
PRIdMAX ") on port %" PRIu16 "\n", name,
1072
1034
host_name, ip, (intmax_t)interface, port);
1074
int ret = start_mandos_communication(ip, (in_port_t)port,
1076
avahi_proto_to_af(proto),
1036
int ret = start_mandos_communication(ip, port, interface,
1037
avahi_proto_to_af(proto));
1079
avahi_simple_poll_quit(simple_poll);
1039
avahi_simple_poll_quit(mc.simple_poll);
1081
if(not add_server(ip, (in_port_t)port, interface,
1082
avahi_proto_to_af(proto),
1083
&((mandos_context*)mc)->current_server)){
1041
if(not add_server(ip, port, interface,
1042
avahi_proto_to_af(proto))){
1084
1043
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1085
1044
" list\n", name);
1127
1083
the callback function is called the Avahi server will free the
1128
1084
resolver for us. */
1130
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1131
interface, protocol, name, type,
1132
domain, protocol, 0,
1133
resolve_callback, mc) == NULL)
1086
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1087
name, type, domain, protocol, 0,
1088
resolve_callback, NULL) == NULL)
1134
1089
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1136
avahi_strerror(avahi_server_errno
1137
(((mandos_context*)mc)->server)));
1091
avahi_strerror(avahi_server_errno(mc.server)));
1140
1094
case AVAHI_BROWSER_REMOVE:
1159
1113
signal_received = sig;
1160
1114
int old_errno = errno;
1161
1115
/* set main loop to exit */
1162
if(simple_poll != NULL){
1163
avahi_simple_poll_quit(simple_poll);
1116
if(mc.simple_poll != NULL){
1117
avahi_simple_poll_quit(mc.simple_poll);
1165
1119
errno = old_errno;
1168
1122
bool get_flags(const char *ifname, struct ifreq *ifr){
1172
1125
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1175
1127
perror_plus("socket");
1179
1130
strcpy(ifr->ifr_name, ifname);
1180
1131
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1184
1134
perror_plus("ioctl SIOCGIFFLAGS");
1260
* This function determines if a network interface is up.
1262
bool interface_is_up(const char *interface){
1264
if(not get_flags(interface, &ifr)){
1266
fprintf_plus(stderr, "Failed to get flags for interface "
1267
"\"%s\"\n", interface);
1272
return (bool)(ifr.ifr_flags & IFF_UP);
1276
* This function determines if a network interface is running
1278
bool interface_is_running(const char *interface){
1280
if(not get_flags(interface, &ifr)){
1282
fprintf_plus(stderr, "Failed to get flags for interface "
1283
"\"%s\"\n", interface);
1288
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1209
* This function determines if a directory entry in /sys/class/net
1210
* corresponds to an acceptable network device which is up.
1211
* (This function is passed to scandir(3) as a filter function.)
1213
int up_interface(const struct dirent *if_entry){
1214
if(if_entry->d_name[0] == '.'){
1219
if(not get_flags(if_entry->d_name, &ifr)){
1221
fprintf_plus(stderr, "Failed to get flags for interface "
1222
"\"%s\"\n", if_entry->d_name);
1227
/* Reject down interfaces */
1228
if(not (ifr.ifr_flags & IFF_UP)){
1230
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1236
/* Reject non-running interfaces */
1237
if(not (ifr.ifr_flags & IFF_RUNNING)){
1239
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1245
if(not good_flags(if_entry->d_name, &ifr)){
1291
1251
int notdotentries(const struct dirent *direntry){
1388
1347
/* Calculating in ms how long time between now and server
1389
1348
who we visted longest time ago. Now - last seen. */
1390
1349
waited_time.tv_sec = (now.tv_sec
1391
- mc->current_server->last_seen.tv_sec);
1350
- mc.current_server->last_seen.tv_sec);
1392
1351
waited_time.tv_nsec = (now.tv_nsec
1393
- mc->current_server->last_seen.tv_nsec);
1352
- mc.current_server->last_seen.tv_nsec);
1394
1353
/* total time is 10s/10,000ms.
1395
1354
Converting to s from ms by dividing by 1,000,
1396
1355
and ns to ms by dividing by 1,000,000. */
1406
1365
if(block_time <= 0){
1407
ret = start_mandos_communication(mc->current_server->ip,
1408
mc->current_server->port,
1409
mc->current_server->if_index,
1410
mc->current_server->af, mc);
1366
ret = start_mandos_communication(mc.current_server->ip,
1367
mc.current_server->port,
1368
mc.current_server->if_index,
1369
mc.current_server->af);
1412
avahi_simple_poll_quit(s);
1371
avahi_simple_poll_quit(mc.simple_poll);
1415
1374
ret = clock_gettime(CLOCK_MONOTONIC,
1416
&mc->current_server->last_seen);
1375
&mc.current_server->last_seen);
1418
1377
perror_plus("clock_gettime");
1421
mc->current_server = mc->current_server->next;
1380
mc.current_server = mc.current_server->next;
1422
1381
block_time = 0; /* Call avahi to find new Mandos
1423
1382
servers, but don't block */
1621
error_t bring_up_interface(const char *const interface,
1561
int bring_up_interface(const char *const interface,
1624
error_t old_errno = errno;
1625
error_t ret_errno = 0;
1626
int ret, ret_setflags;
1564
int old_errno = errno;
1627
1567
struct ifreq network;
1628
unsigned int if_index = if_nametoindex(interface);
1568
AvahiIfIndex if_index = (AvahiIfIndex)if_nametoindex(interface);
1629
1569
if(if_index == 0){
1630
1570
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1631
1571
errno = old_errno;
1640
if(not interface_is_up(interface)){
1641
if(not get_flags(interface, &network) and debug){
1643
fprintf_plus(stderr, "Failed to get flags for interface "
1644
"\"%s\"\n", interface);
1580
/* Re-raise priviliges */
1584
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1585
messages about the network interface to mess up the prompt */
1586
ret = klogctl(8, NULL, 5);
1587
bool restore_loglevel = true;
1589
restore_loglevel = false;
1590
perror_plus("klogctl");
1592
#endif /* __linux__ */
1594
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1597
perror_plus("socket");
1599
if(restore_loglevel){
1600
ret = klogctl(7, NULL, 0);
1602
perror_plus("klogctl");
1605
#endif /* __linux__ */
1606
/* Lower privileges */
1611
strcpy(network.ifr_name, interface);
1612
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1615
perror_plus("ioctl SIOCGIFFLAGS");
1617
if(restore_loglevel){
1618
ret = klogctl(7, NULL, 0);
1620
perror_plus("klogctl");
1623
#endif /* __linux__ */
1624
/* Lower privileges */
1629
if((network.ifr_flags & IFF_UP) == 0){
1647
1630
network.ifr_flags |= IFF_UP;
1649
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1631
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1651
1633
ret_errno = errno;
1652
perror_plus("socket");
1664
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1668
/* Raise priviliges */
1672
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1673
messages about the network interface to mess up the prompt */
1674
int ret_linux = klogctl(8, NULL, 5);
1675
bool restore_loglevel = true;
1676
if(ret_linux == -1){
1677
restore_loglevel = false;
1678
perror_plus("klogctl");
1680
#endif /* __linux__ */
1681
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1684
if(restore_loglevel){
1685
ret_linux = klogctl(7, NULL, 0);
1686
if(ret_linux == -1){
1687
perror_plus("klogctl");
1690
#endif /* __linux__ */
1692
/* Lower privileges */
1695
/* Close the socket */
1696
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1698
perror_plus("close");
1701
if(ret_setflags == -1){
1703
1634
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1636
if(restore_loglevel){
1637
ret = klogctl(7, NULL, 0);
1639
perror_plus("klogctl");
1642
#endif /* __linux__ */
1643
/* Lower privileges */
1704
1645
errno = old_errno;
1705
1646
return ret_errno;
1708
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1712
1649
/* Sleep checking until interface is running.
1713
1650
Check every 0.25s, up to total time of delay */
1714
1651
for(int i=0; i < delay * 4; i++){
1715
if(interface_is_running(interface)){
1652
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1654
perror_plus("ioctl SIOCGIFFLAGS");
1655
} else if(network.ifr_flags & IFF_RUNNING){
1718
1658
struct timespec sleeptime = { .tv_nsec = 250000000 };
1721
1661
perror_plus("nanosleep");
1729
error_t take_down_interface(const char *const interface){
1731
error_t old_errno = errno;
1732
error_t ret_errno = 0;
1733
int ret, ret_setflags;
1734
struct ifreq network;
1735
unsigned int if_index = if_nametoindex(interface);
1737
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1664
/* Close the socket */
1665
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1667
perror_plus("close");
1741
if(interface_is_up(interface)){
1742
if(not get_flags(interface, &network) and debug){
1744
fprintf_plus(stderr, "Failed to get flags for interface "
1745
"\"%s\"\n", interface);
1748
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1750
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1753
perror_plus("socket");
1759
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1763
/* Raise priviliges */
1766
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1769
/* Lower privileges */
1772
/* Close the socket */
1773
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1670
if(restore_loglevel){
1671
/* Restores kernel loglevel to default */
1672
ret = klogctl(7, NULL, 0);
1775
perror_plus("close");
1778
if(ret_setflags == -1){
1780
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1785
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1674
perror_plus("klogctl");
1677
#endif /* __linux__ */
1678
/* Lower privileges */
1789
1680
errno = old_errno;
1793
1684
int main(int argc, char *argv[]){
1794
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1795
.priority = "SECURE256:!CTYPE-X.509:"
1796
"+CTYPE-OPENPGP", .current_server = NULL,
1797
.interfaces = NULL, .interfaces_size = 0 };
1798
1685
AvahiSServiceBrowser *sb = NULL;
1801
1688
intmax_t tmpmax;
1803
1690
int exitcode = EXIT_SUCCESS;
1804
char *interfaces_to_take_down = NULL;
1805
size_t interfaces_to_take_down_size = 0;
1691
const char *interface = "";
1692
struct ifreq network;
1694
bool take_down_interface = false;
1806
1695
char tempdir[] = "/tmp/mandosXXXXXX";
1807
1696
bool tempdir_created = false;
1808
1697
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1809
1698
const char *seckey = PATHDIR "/" SECKEY;
1810
1699
const char *pubkey = PATHDIR "/" PUBKEY;
1811
char *interfaces_hooks = NULL;
1812
size_t interfaces_hooks_size = 0;
1814
1701
bool gnutls_initialized = false;
1815
1702
bool gpgme_initialized = false;
2042
1925
/* Lower privileges */
2047
/* Remove invalid interface names (except "none") */
2049
char *interface = NULL;
2050
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2052
if(strcmp(interface, "none") != 0
2053
and if_nametoindex(interface) == 0){
2054
if(interface[0] != '\0'){
2055
fprintf_plus(stderr, "Not using nonexisting interface"
2056
" \"%s\"\n", interface);
2058
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
1929
perror_plus("seteuid");
2064
1934
/* Run network hooks */
2066
if(mc.interfaces != NULL){
2067
interfaces_hooks = malloc(mc.interfaces_size);
2068
if(interfaces_hooks == NULL){
1935
if(not run_network_hooks("start", interface, delay)){
1940
avahi_set_log_function(empty_log);
1943
if(interface[0] == '\0'){
1944
struct dirent **direntries;
1945
/* First look for interfaces that are up */
1946
ret = scandir(sys_class_net, &direntries, up_interface,
1949
/* No up interfaces, look for any good interfaces */
1951
ret = scandir(sys_class_net, &direntries, good_interface,
1955
/* Pick the first interface returned */
1956
interface = strdup(direntries[0]->d_name);
1958
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1960
if(interface == NULL){
2069
1961
perror_plus("malloc");
1963
exitcode = EXIT_FAILURE;
2072
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2073
interfaces_hooks_size = mc.interfaces_size;
2074
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2077
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2078
interfaces_hooks : "", delay)){
1969
fprintf_plus(stderr, "Could not find a network interface\n");
1970
exitcode = EXIT_FAILURE;
2084
avahi_set_log_function(empty_log);
2087
1975
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2088
1976
from the signal handler */
2089
1977
/* Initialize the pseudo-RNG for Avahi */
2090
1978
srand((unsigned int) time(NULL));
2091
simple_poll = avahi_simple_poll_new();
2092
if(simple_poll == NULL){
1979
mc.simple_poll = avahi_simple_poll_new();
1980
if(mc.simple_poll == NULL){
2093
1981
fprintf_plus(stderr,
2094
1982
"Avahi: Failed to create simple poll object.\n");
2095
1983
exitcode = EX_UNAVAILABLE;
2162
/* If no interfaces were specified, make a list */
2163
if(mc.interfaces == NULL){
2164
struct dirent **direntries;
2165
/* Look for any good interfaces */
2166
ret = scandir(sys_class_net, &direntries, good_interface,
2169
/* Add all found interfaces to interfaces list */
2170
for(int i = 0; i < ret; ++i){
2171
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2172
direntries[i]->d_name);
2174
perror_plus("argz_add");
2178
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2179
direntries[i]->d_name);
2185
fprintf_plus(stderr, "Could not find a network interface\n");
2186
exitcode = EXIT_FAILURE;
2191
/* Bring up interfaces which are down, and remove any "none"s */
2193
char *interface = NULL;
2194
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2196
/* If interface name is "none", stop bringing up interfaces.
2197
Also remove all instances of "none" from the list */
2198
if(strcmp(interface, "none") == 0){
2199
argz_delete(&mc.interfaces, &mc.interfaces_size,
2202
while((interface = argz_next(mc.interfaces,
2203
mc.interfaces_size, interface))){
2204
if(strcmp(interface, "none") == 0){
2205
argz_delete(&mc.interfaces, &mc.interfaces_size,
2212
bool interface_was_up = interface_is_up(interface);
2213
ret = bring_up_interface(interface, delay);
2214
if(not interface_was_up){
2217
perror_plus("Failed to bring up interface");
2219
ret_errno = argz_add(&interfaces_to_take_down,
2220
&interfaces_to_take_down_size,
2225
if(debug and (interfaces_to_take_down == NULL)){
2226
fprintf_plus(stderr, "No interfaces were brought up\n");
2230
/* If we only got one interface, explicitly use only that one */
2231
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2233
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2236
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2050
/* If the interface is down, bring it up */
2051
if((interface[0] != '\0') and (strcmp(interface, "none") != 0)){
2052
ret = bring_up_interface(interface, delay);
2055
perror_plus("Failed to bring up interface");
2243
ret = init_gnutls_global(pubkey, seckey, &mc);
2063
ret = init_gnutls_global(pubkey, seckey);
2245
2065
fprintf_plus(stderr, "init_gnutls_global failed\n");
2246
2066
exitcode = EX_UNAVAILABLE;
2295
2115
tmpmax = strtoimax(address+1, &tmp, 10);
2296
2116
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2297
or tmpmax != (in_port_t)tmpmax){
2117
or tmpmax != (uint16_t)tmpmax){
2298
2118
fprintf_plus(stderr, "Bad port number\n");
2299
2119
exitcode = EX_USAGE;
2307
port = (in_port_t)tmpmax;
2127
port = (uint16_t)tmpmax;
2308
2128
*address = '\0';
2309
2129
/* Colon in address indicates IPv6 */
2359
2178
config.publish_domain = 0;
2361
2180
/* Allocate a new server */
2362
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2363
&config, NULL, NULL, &ret_errno);
2181
mc.server = avahi_server_new(avahi_simple_poll_get
2182
(mc.simple_poll), &config, NULL,
2365
2185
/* Free the Avahi configuration data */
2366
2186
avahi_server_config_free(&config);
2381
2201
/* Create the Avahi service browser */
2382
2202
sb = avahi_s_service_browser_new(mc.server, if_index,
2383
2203
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2384
NULL, 0, browse_callback,
2204
NULL, 0, browse_callback, NULL);
2386
2205
if(sb == NULL){
2387
2206
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2388
2207
avahi_strerror(avahi_server_errno(mc.server)));
2400
2219
fprintf_plus(stderr, "Starting Avahi loop search\n");
2403
ret = avahi_loop_with_timeout(simple_poll,
2404
(int)(retry_interval * 1000), &mc);
2222
ret = avahi_loop_with_timeout(mc.simple_poll,
2223
(int)(retry_interval * 1000));
2406
2225
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2407
2226
(ret == 0) ? "successfully" : "with error");
2266
/* Run network hooks */
2267
run_network_hooks("stop", interface, delay);
2449
2269
/* Re-raise priviliges */
2451
2271
raise_privileges();
2453
/* Run network hooks */
2454
run_network_hooks("stop", interfaces_hooks != NULL ?
2455
interfaces_hooks : "", delay);
2457
/* Take down the network interfaces which were brought up */
2459
char *interface = NULL;
2460
while((interface=argz_next(interfaces_to_take_down,
2461
interfaces_to_take_down_size,
2463
ret_errno = take_down_interface(interface);
2466
perror_plus("Failed to take down interface");
2273
/* Take down the network interface */
2274
if(take_down_interface and geteuid() == 0){
2275
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2277
perror_plus("ioctl SIOCGIFFLAGS");
2278
} else if(network.ifr_flags & IFF_UP){
2279
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2280
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2282
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2469
if(debug and (interfaces_to_take_down == NULL)){
2470
fprintf_plus(stderr, "No interfaces needed to be taken"
2285
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2287
perror_plus("close");
2475
lower_privileges_permanently();
2478
free(interfaces_to_take_down);
2479
free(interfaces_hooks);
2291
/* Lower privileges permanently */
2295
perror_plus("setuid");
2481
2298
/* Removes the GPGME temp directory and all files inside */
2482
2299
if(tempdir_created){