192
198
* bytes. "buffer_capacity" is how much is currently allocated,
193
199
* "buffer_length" is how much is already used.
201
__attribute__((nonnull, warn_unused_result))
195
202
size_t incbuffer(char **buffer, size_t buffer_length,
196
203
size_t buffer_capacity){
197
204
if(buffer_length + BUFFER_SIZE > buffer_capacity){
198
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
205
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
207
int old_errno = errno;
202
214
buffer_capacity += BUFFER_SIZE;
204
216
return buffer_capacity;
207
219
/* Add server to set of servers to retry periodically */
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
220
__attribute__((nonnull, warn_unused_result))
221
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
222
int af, server **current_server){
211
224
server *new_server = malloc(sizeof(server));
212
225
if(new_server == NULL){
221
234
perror_plus("strdup");
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
239
perror_plus("clock_gettime");
224
242
/* Special case of first server */
225
if (mc.current_server == NULL){
243
if(*current_server == NULL){
226
244
new_server->next = new_server;
227
245
new_server->prev = new_server;
228
mc.current_server = new_server;
229
/* Place the new server last in the list */
246
*current_server = new_server;
231
new_server->next = mc.current_server;
232
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;
233
251
new_server->prev->next = new_server;
234
mc.current_server->prev = new_server;
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
238
perror_plus("clock_gettime");
252
(*current_server)->prev = new_server;
532
550
/* GnuTLS server initialization */
533
ret = gnutls_dh_params_init(&mc.dh_params);
551
ret = gnutls_dh_params_init(&mc->dh_params);
534
552
if(ret != GNUTLS_E_SUCCESS){
535
553
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
554
" initialization: %s\n",
537
555
safer_gnutls_strerror(ret));
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
558
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
541
559
if(ret != GNUTLS_E_SUCCESS){
542
560
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
561
safer_gnutls_strerror(ret));
547
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
565
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
553
gnutls_certificate_free_credentials(mc.cred);
571
gnutls_certificate_free_credentials(mc->cred);
554
572
gnutls_global_deinit();
555
gnutls_dh_params_deinit(mc.dh_params);
573
gnutls_dh_params_deinit(mc->dh_params);
559
static int init_gnutls_session(gnutls_session_t *session){
577
__attribute__((nonnull, warn_unused_result))
578
static int init_gnutls_session(gnutls_session_t *session,
561
581
/* GnuTLS session creation */
658
ret = init_gnutls_session(&session);
676
/* If the interface is specified and we have a list of interfaces */
677
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
678
/* Check if the interface is one of the interfaces we are using */
681
char *interface = NULL;
682
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
684
if(if_nametoindex(interface) == (unsigned int)if_index){
691
/* This interface does not match any in the list, so we don't
692
connect to the server */
694
char interface[IF_NAMESIZE];
695
if(if_indextoname((unsigned int)if_index, interface) == NULL){
696
perror_plus("if_indextoname");
698
fprintf_plus(stderr, "Skipping server on non-used interface"
700
if_indextoname((unsigned int)if_index,
708
ret = init_gnutls_session(&session, mc);
664
714
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
715
PRIuMAX "\n", ip, (uintmax_t)port);
668
718
tcp_sd = socket(pf, SOCK_STREAM, 0);
732
776
if(if_indextoname((unsigned int)if_index, interface) == NULL){
733
777
perror_plus("if_indextoname");
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
779
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
780
"\n", ip, interface, (uintmax_t)port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
783
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
784
ip, (uintmax_t)port);
742
786
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
743
787
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
788
if(af == AF_INET6){
746
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
789
ret = getnameinfo((struct sockaddr *)&to,
790
sizeof(struct sockaddr_in6),
791
addrstr, sizeof(addrstr), NULL, 0,
749
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
794
ret = getnameinfo((struct sockaddr *)&to,
795
sizeof(struct sockaddr_in),
796
addrstr, sizeof(addrstr), NULL, 0,
753
perror_plus("inet_ntop");
755
if(strcmp(addrstr, ip) != 0){
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
799
if(ret == EAI_SYSTEM){
800
perror_plus("getnameinfo");
801
} else if(ret != 0) {
802
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
803
} else if(strcmp(addrstr, ip) != 0){
804
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1031
1084
PRIdMAX ") on port %" PRIu16 "\n", name,
1032
1085
host_name, ip, (intmax_t)interface, port);
1034
int ret = start_mandos_communication(ip, port, interface,
1035
avahi_proto_to_af(proto));
1087
int ret = start_mandos_communication(ip, (in_port_t)port,
1089
avahi_proto_to_af(proto),
1037
avahi_simple_poll_quit(mc.simple_poll);
1092
avahi_simple_poll_quit(simple_poll);
1039
if(not add_server(ip, port, interface,
1040
avahi_proto_to_af(proto))){
1094
if(not add_server(ip, (in_port_t)port, interface,
1095
avahi_proto_to_af(proto),
1096
&((mandos_context*)mc)->current_server)){
1041
1097
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1042
1098
" list\n", name);
1081
1140
the callback function is called the Avahi server will free the
1082
1141
resolver for us. */
1084
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1085
name, type, domain, protocol, 0,
1086
resolve_callback, NULL) == NULL)
1143
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1144
interface, protocol, name, type,
1145
domain, protocol, 0,
1146
resolve_callback, mc) == NULL)
1087
1147
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1089
avahi_strerror(avahi_server_errno(mc.server)));
1149
avahi_strerror(avahi_server_errno
1150
(((mandos_context*)mc)->server)));
1092
1153
case AVAHI_BROWSER_REMOVE:
1111
1172
signal_received = sig;
1112
1173
int old_errno = errno;
1113
1174
/* set main loop to exit */
1114
if(mc.simple_poll != NULL){
1115
avahi_simple_poll_quit(mc.simple_poll);
1175
if(simple_poll != NULL){
1176
avahi_simple_poll_quit(simple_poll);
1117
1178
errno = old_errno;
1181
__attribute__((nonnull, warn_unused_result))
1120
1182
bool get_flags(const char *ifname, struct ifreq *ifr){
1123
1186
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1125
1189
perror_plus("socket");
1128
1193
strcpy(ifr->ifr_name, ifname);
1129
1194
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1132
1198
perror_plus("ioctl SIOCGIFFLAGS");
1206
__attribute__((nonnull, warn_unused_result))
1139
1207
bool good_flags(const char *ifname, const struct ifreq *ifr){
1141
1209
/* Reject the loopback device */
1207
* This function determines if a directory entry in /sys/class/net
1208
* corresponds to an acceptable network device which is up.
1209
* (This function is passed to scandir(3) as a filter function.)
1211
int up_interface(const struct dirent *if_entry){
1212
if(if_entry->d_name[0] == '.'){
1217
if(not get_flags(if_entry->d_name, &ifr)){
1219
fprintf_plus(stderr, "Failed to get flags for interface "
1220
"\"%s\"\n", if_entry->d_name);
1225
/* Reject down interfaces */
1226
if(not (ifr.ifr_flags & IFF_UP)){
1228
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1234
/* Reject non-running interfaces */
1235
if(not (ifr.ifr_flags & IFF_RUNNING)){
1237
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1243
if(not good_flags(if_entry->d_name, &ifr)){
1276
* This function determines if a network interface is up.
1278
__attribute__((nonnull, warn_unused_result))
1279
bool interface_is_up(const char *interface){
1281
if(not get_flags(interface, &ifr)){
1283
fprintf_plus(stderr, "Failed to get flags for interface "
1284
"\"%s\"\n", interface);
1289
return (bool)(ifr.ifr_flags & IFF_UP);
1293
* This function determines if a network interface is running
1295
__attribute__((nonnull, warn_unused_result))
1296
bool interface_is_running(const char *interface){
1298
if(not get_flags(interface, &ifr)){
1300
fprintf_plus(stderr, "Failed to get flags for interface "
1301
"\"%s\"\n", interface);
1306
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1309
__attribute__((nonnull, pure, warn_unused_result))
1249
1310
int notdotentries(const struct dirent *direntry){
1250
1311
/* Skip "." and ".." */
1251
1312
if(direntry->d_name[0] == '.'
1355
1419
- ((intmax_t)waited_time.tv_sec * 1000))
1356
1420
- ((intmax_t)waited_time.tv_nsec / 1000000));
1359
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1363
1427
if(block_time <= 0){
1364
ret = start_mandos_communication(mc.current_server->ip,
1365
mc.current_server->port,
1366
mc.current_server->if_index,
1367
mc.current_server->af);
1428
ret = start_mandos_communication(mc->current_server->ip,
1429
mc->current_server->port,
1430
mc->current_server->if_index,
1431
mc->current_server->af, mc);
1369
avahi_simple_poll_quit(mc.simple_poll);
1433
avahi_simple_poll_quit(s);
1372
1436
ret = clock_gettime(CLOCK_MONOTONIC,
1373
&mc.current_server->last_seen);
1437
&mc->current_server->last_seen);
1375
1439
perror_plus("clock_gettime");
1378
mc.current_server = mc.current_server->next;
1442
mc->current_server = mc->current_server->next;
1379
1443
block_time = 0; /* Call avahi to find new Mandos
1380
1444
servers, but don't block */
1383
1447
ret = avahi_simple_poll_iterate(s, (int)block_time);
1386
if (ret > 0 or errno != EINTR){
1450
if(ret > 0 or errno != EINTR){
1387
1451
return (ret != 1) ? ret : 0;
1393
bool run_network_hooks(const char *mode, const char *interface,
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
error_t raise_privileges(void){
1460
error_t old_errno = errno;
1461
error_t ret_errno = 0;
1462
if(seteuid(0) == -1){
1464
perror_plus("seteuid");
1470
/* Set effective and real user ID to 0. Return errno. */
1471
__attribute__((warn_unused_result))
1472
error_t raise_privileges_permanently(void){
1473
error_t old_errno = errno;
1474
error_t ret_errno = raise_privileges();
1479
if(setuid(0) == -1){
1481
perror_plus("seteuid");
1487
/* Set effective user ID to unprivileged saved user ID */
1488
__attribute__((warn_unused_result))
1489
error_t lower_privileges(void){
1490
error_t old_errno = errno;
1491
error_t ret_errno = 0;
1492
if(seteuid(uid) == -1){
1494
perror_plus("seteuid");
1500
/* Lower privileges permanently */
1501
__attribute__((warn_unused_result))
1502
error_t lower_privileges_permanently(void){
1503
error_t old_errno = errno;
1504
error_t ret_errno = 0;
1505
if(setuid(uid) == -1){
1507
perror_plus("setuid");
1513
__attribute__((nonnull))
1514
void run_network_hooks(const char *mode, const char *interface,
1394
1515
const float delay){
1395
1516
struct dirent **direntries;
1396
struct dirent *direntry;
1398
1517
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1400
1519
if(numhooks == -1){
1401
perror_plus("scandir");
1520
if(errno == ENOENT){
1522
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1523
" found\n", hookdir);
1526
perror_plus("scandir");
1529
struct dirent *direntry;
1403
1531
int devnull = open("/dev/null", O_RDONLY);
1404
1532
for(int i = 0; i < numhooks; i++){
1405
1533
direntry = direntries[i];
1524
1659
close(devnull);
1663
__attribute__((nonnull, warn_unused_result))
1664
error_t bring_up_interface(const char *const interface,
1666
error_t old_errno = errno;
1668
struct ifreq network;
1669
unsigned int if_index = if_nametoindex(interface);
1671
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1681
if(not interface_is_up(interface)){
1682
error_t ret_errno = 0, ioctl_errno = 0;
1683
if(not get_flags(interface, &network)){
1685
fprintf_plus(stderr, "Failed to get flags for interface "
1686
"\"%s\"\n", interface);
1690
network.ifr_flags |= IFF_UP; /* set flag */
1692
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1695
perror_plus("socket");
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1703
perror_plus("close");
1710
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1714
/* Raise privileges */
1715
ret_errno = raise_privileges();
1716
bool restore_loglevel = false;
1718
perror_plus("Failed to raise privileges");
1723
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1724
messages about the network interface to mess up the prompt */
1725
ret_linux = klogctl(8, NULL, 5);
1726
if(ret_linux == -1){
1727
perror_plus("klogctl");
1729
restore_loglevel = true;
1732
#endif /* __linux__ */
1733
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1734
ioctl_errno = errno;
1736
if(restore_loglevel){
1737
ret_linux = klogctl(7, NULL, 0);
1738
if(ret_linux == -1){
1739
perror_plus("klogctl");
1742
#endif /* __linux__ */
1744
/* If raise_privileges() succeeded above */
1746
/* Lower privileges */
1747
ret_errno = lower_privileges();
1750
perror_plus("Failed to lower privileges");
1754
/* Close the socket */
1755
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1757
perror_plus("close");
1760
if(ret_setflags == -1){
1761
errno = ioctl_errno;
1762
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1767
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1771
/* Sleep checking until interface is running.
1772
Check every 0.25s, up to total time of delay */
1773
for(int i=0; i < delay * 4; i++){
1774
if(interface_is_running(interface)){
1777
struct timespec sleeptime = { .tv_nsec = 250000000 };
1778
ret = nanosleep(&sleeptime, NULL);
1779
if(ret == -1 and errno != EINTR){
1780
perror_plus("nanosleep");
1788
__attribute__((nonnull, warn_unused_result))
1789
error_t take_down_interface(const char *const interface){
1790
error_t old_errno = errno;
1791
struct ifreq network;
1792
unsigned int if_index = if_nametoindex(interface);
1794
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1798
if(interface_is_up(interface)){
1799
error_t ret_errno = 0, ioctl_errno = 0;
1800
if(not get_flags(interface, &network) and debug){
1802
fprintf_plus(stderr, "Failed to get flags for interface "
1803
"\"%s\"\n", interface);
1807
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1809
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1812
perror_plus("socket");
1818
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1822
/* Raise privileges */
1823
ret_errno = raise_privileges();
1825
perror_plus("Failed to raise privileges");
1827
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1828
ioctl_errno = errno;
1830
/* If raise_privileges() succeeded above */
1832
/* Lower privileges */
1833
ret_errno = lower_privileges();
1836
perror_plus("Failed to lower privileges");
1840
/* Close the socket */
1841
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1843
perror_plus("close");
1846
if(ret_setflags == -1){
1847
errno = ioctl_errno;
1848
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1853
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1529
1861
int main(int argc, char *argv[]){
1862
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1863
.priority = "SECURE256:!CTYPE-X.509:"
1864
"+CTYPE-OPENPGP", .current_server = NULL,
1865
.interfaces = NULL, .interfaces_size = 0 };
1530
1866
AvahiSServiceBrowser *sb = NULL;
1533
1869
intmax_t tmpmax;
1535
1871
int exitcode = EXIT_SUCCESS;
1536
const char *interface = "";
1537
struct ifreq network;
1539
bool take_down_interface = false;
1872
char *interfaces_to_take_down = NULL;
1873
size_t interfaces_to_take_down_size = 0;
1542
1874
char tempdir[] = "/tmp/mandosXXXXXX";
1543
1875
bool tempdir_created = false;
1544
1876
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1545
1877
const char *seckey = PATHDIR "/" SECKEY;
1546
1878
const char *pubkey = PATHDIR "/" PUBKEY;
1879
char *interfaces_hooks = NULL;
1548
1881
bool gnutls_initialized = false;
1549
1882
bool gpgme_initialized = false;
1776
2113
/* Lower privileges */
1780
perror_plus("seteuid");
2114
ret_errno = lower_privileges();
2117
perror_plus("Failed to lower privileges");
2122
/* Remove invalid interface names (except "none") */
2124
char *interface = NULL;
2125
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2127
if(strcmp(interface, "none") != 0
2128
and if_nametoindex(interface) == 0){
2129
if(interface[0] != '\0'){
2130
fprintf_plus(stderr, "Not using nonexisting interface"
2131
" \"%s\"\n", interface);
2133
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
1785
2139
/* Run network hooks */
1786
if(not run_network_hooks("start", interface, delay)){
2141
if(mc.interfaces != NULL){
2142
interfaces_hooks = malloc(mc.interfaces_size);
2143
if(interfaces_hooks == NULL){
2144
perror_plus("malloc");
2147
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2148
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2150
run_network_hooks("start", interfaces_hooks != NULL ?
2151
interfaces_hooks : "", delay);
1791
2155
avahi_set_log_function(empty_log);
1794
if(interface[0] == '\0'){
1795
struct dirent **direntries;
1796
/* First look for interfaces that are up */
1797
ret = scandir(sys_class_net, &direntries, up_interface,
1800
/* No up interfaces, look for any good interfaces */
1802
ret = scandir(sys_class_net, &direntries, good_interface,
1806
/* Pick the first interface returned */
1807
interface = strdup(direntries[0]->d_name);
1809
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1811
if(interface == NULL){
1812
perror_plus("malloc");
1814
exitcode = EXIT_FAILURE;
1820
fprintf_plus(stderr, "Could not find a network interface\n");
1821
exitcode = EXIT_FAILURE;
1826
2158
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1827
2159
from the signal handler */
1828
2160
/* Initialize the pseudo-RNG for Avahi */
1829
2161
srand((unsigned int) time(NULL));
1830
mc.simple_poll = avahi_simple_poll_new();
1831
if(mc.simple_poll == NULL){
2162
simple_poll = avahi_simple_poll_new();
2163
if(simple_poll == NULL){
1832
2164
fprintf_plus(stderr,
1833
2165
"Avahi: Failed to create simple poll object.\n");
1834
2166
exitcode = EX_UNAVAILABLE;
1901
/* If the interface is down, bring it up */
1902
if(strcmp(interface, "none") != 0){
1903
if_index = (AvahiIfIndex) if_nametoindex(interface);
1905
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1906
exitcode = EX_UNAVAILABLE;
1914
/* Re-raise priviliges */
1918
perror_plus("seteuid");
1922
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1923
messages about the network interface to mess up the prompt */
1924
ret = klogctl(8, NULL, 5);
1925
bool restore_loglevel = true;
1927
restore_loglevel = false;
1928
perror_plus("klogctl");
1930
#endif /* __linux__ */
1932
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1934
perror_plus("socket");
1935
exitcode = EX_OSERR;
1937
if(restore_loglevel){
1938
ret = klogctl(7, NULL, 0);
1940
perror_plus("klogctl");
1943
#endif /* __linux__ */
1944
/* Lower privileges */
1948
perror_plus("seteuid");
1952
strcpy(network.ifr_name, interface);
1953
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1955
perror_plus("ioctl SIOCGIFFLAGS");
1957
if(restore_loglevel){
1958
ret = klogctl(7, NULL, 0);
1960
perror_plus("klogctl");
1963
#endif /* __linux__ */
1964
exitcode = EX_OSERR;
1965
/* Lower privileges */
1969
perror_plus("seteuid");
1973
if((network.ifr_flags & IFF_UP) == 0){
1974
network.ifr_flags |= IFF_UP;
1975
take_down_interface = true;
1976
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1978
take_down_interface = false;
1979
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1980
exitcode = EX_OSERR;
1982
if(restore_loglevel){
1983
ret = klogctl(7, NULL, 0);
1985
perror_plus("klogctl");
2233
/* If no interfaces were specified, make a list */
2234
if(mc.interfaces == NULL){
2235
struct dirent **direntries;
2236
/* Look for any good interfaces */
2237
ret = scandir(sys_class_net, &direntries, good_interface,
2240
/* Add all found interfaces to interfaces list */
2241
for(int i = 0; i < ret; ++i){
2242
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2243
direntries[i]->d_name);
2246
perror_plus("argz_add");
2250
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2251
direntries[i]->d_name);
2257
fprintf_plus(stderr, "Could not find a network interface\n");
2258
exitcode = EXIT_FAILURE;
2263
/* Bring up interfaces which are down, and remove any "none"s */
2265
char *interface = NULL;
2266
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2268
/* If interface name is "none", stop bringing up interfaces.
2269
Also remove all instances of "none" from the list */
2270
if(strcmp(interface, "none") == 0){
2271
argz_delete(&mc.interfaces, &mc.interfaces_size,
2274
while((interface = argz_next(mc.interfaces,
2275
mc.interfaces_size, interface))){
2276
if(strcmp(interface, "none") == 0){
2277
argz_delete(&mc.interfaces, &mc.interfaces_size,
1988
#endif /* __linux__ */
1989
/* Lower privileges */
1993
perror_plus("seteuid");
1998
/* Sleep checking until interface is running.
1999
Check every 0.25s, up to total time of delay */
2000
for(int i=0; i < delay * 4; i++){
2001
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2003
perror_plus("ioctl SIOCGIFFLAGS");
2004
} else if(network.ifr_flags & IFF_RUNNING){
2007
struct timespec sleeptime = { .tv_nsec = 250000000 };
2008
ret = nanosleep(&sleeptime, NULL);
2009
if(ret == -1 and errno != EINTR){
2010
perror_plus("nanosleep");
2013
if(not take_down_interface){
2014
/* We won't need the socket anymore */
2015
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2017
perror_plus("close");
2021
if(restore_loglevel){
2022
/* Restores kernel loglevel to default */
2023
ret = klogctl(7, NULL, 0);
2025
perror_plus("klogctl");
2028
#endif /* __linux__ */
2029
/* Lower privileges */
2031
/* Lower privileges */
2034
perror_plus("seteuid");
2284
bool interface_was_up = interface_is_up(interface);
2285
errno = bring_up_interface(interface, delay);
2286
if(not interface_was_up){
2288
perror_plus("Failed to bring up interface");
2290
errno = argz_add(&interfaces_to_take_down,
2291
&interfaces_to_take_down_size,
2294
perror_plus("argz_add");
2299
if(debug and (interfaces_to_take_down == NULL)){
2300
fprintf_plus(stderr, "No interfaces were brought up\n");
2304
/* If we only got one interface, explicitly use only that one */
2305
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2307
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2310
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2042
ret = init_gnutls_global(pubkey, seckey);
2317
ret = init_gnutls_global(pubkey, seckey, &mc);
2044
2319
fprintf_plus(stderr, "init_gnutls_global failed\n");
2045
2320
exitcode = EX_UNAVAILABLE;
2244
/* Run network hooks */
2245
run_network_hooks("stop", interface, delay);
2247
/* Re-raise priviliges */
2523
/* Re-raise privileges */
2252
perror_plus("seteuid");
2255
/* Take down the network interface */
2256
if(take_down_interface and geteuid() == 0){
2257
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2259
perror_plus("ioctl SIOCGIFFLAGS");
2260
} else if(network.ifr_flags & IFF_UP){
2261
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2262
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2264
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2267
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2269
perror_plus("close");
2273
/* Lower privileges permanently */
2277
perror_plus("setuid");
2525
ret_errno = raise_privileges();
2527
perror_plus("Failed to raise privileges");
2530
/* Run network hooks */
2531
run_network_hooks("stop", interfaces_hooks != NULL ?
2532
interfaces_hooks : "", delay);
2534
/* Take down the network interfaces which were brought up */
2536
char *interface = NULL;
2537
while((interface=argz_next(interfaces_to_take_down,
2538
interfaces_to_take_down_size,
2540
ret_errno = take_down_interface(interface);
2543
perror_plus("Failed to take down interface");
2546
if(debug and (interfaces_to_take_down == NULL)){
2547
fprintf_plus(stderr, "No interfaces needed to be taken"
2552
ret_errno = lower_privileges_permanently();
2554
perror_plus("Failed to lower privileges permanently");
2558
free(interfaces_to_take_down);
2559
free(interfaces_hooks);
2280
2561
/* Removes the GPGME temp directory and all files inside */
2281
2562
if(tempdir_created){