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- Committer: Teddy Hogeborn
- Date: 2012-06-23 00:58:49 UTC
- Revision ID: teddy@recompile.se-20120623005849-02wj82cng433rt2k
* clients.conf: Convert all time intervals to new RFC 3339 syntax.
* mandos: All client options for time intervals now take an RFC 3339
duration.
(rfc3339_duration_to_delta): New function.
(string_to_delta): Try rfc3339_duration_to_delta first.
* mandos-clients.conf.xml (OPTIONS/timeout): Document new format.
(EXAMPLE): Update to new interval format.
(SEE ALSO): Reference RFC 3339.
* mandos: All client options for time intervals now take an RFC 3339
duration.
(rfc3339_duration_to_delta): New function.
(string_to_delta): Try rfc3339_duration_to_delta first.
* mandos-clients.conf.xml (OPTIONS/timeout): Document new format.
(EXAMPLE): Update to new interval format.
(SEE ALSO): Reference RFC 3339.
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
#include <assert.h> /* assert() */
65
64
#include <errno.h> /* perror(), errno,
66
65
program_invocation_short_name */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
88
87
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
88
WEXITSTATUS(), WTERMSIG() */
90
89
#include <grp.h> /* setgroups() */
90
#include <argz.h> /* argz_add_sep(), argz_next(),
91
argz_delete(), argz_append(),
92
argz_stringify(), argz_add(),
93
argz_count() */
91
94
92
95
#ifdef __linux__
93
96
#include <sys/klog.h> /* klogctl() */
141
144
/* Doubly linked list that need to be circularly linked when used */
142
145
typedef struct server{
143
146
const char *ip;
144
uint16_t port;
147
in_port_t port;
145
148
AvahiIfIndex if_index;
146
149
int af;
147
150
struct timespec last_seen;
151
154
152
155
/* Used for passing in values through the Avahi callback functions */
153
156
typedef struct {
154
AvahiSimplePoll *simple_poll;
155
157
AvahiServer *server;
156
158
gnutls_certificate_credentials_t cred;
157
159
unsigned int dh_bits;
159
161
const char *priority;
160
162
gpgme_ctx_t ctx;
161
163
server *current_server;
164
char *interfaces;
165
size_t interfaces_size;
162
166
} mandos_context;
163
167
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 };
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
169
170
170
171
sig_atomic_t quit_now = 0;
171
172
int signal_received = 0;
207
208
}
208
209
209
210
/* Add server to set of servers to retry periodically */
210
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
211
int af){
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
int af, server **current_server){
212
213
int ret;
213
214
server *new_server = malloc(sizeof(server));
214
215
if(new_server == NULL){
224
225
return false;
225
226
}
226
227
/* Special case of first server */
227
if (mc.current_server == NULL){
228
if(*current_server == NULL){
228
229
new_server->next = new_server;
229
230
new_server->prev = new_server;
230
mc.current_server = new_server;
231
*current_server = new_server;
231
232
/* Place the new server last in the list */
232
233
} else {
233
new_server->next = mc.current_server;
234
new_server->prev = mc.current_server->prev;
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
235
236
new_server->prev->next = new_server;
236
mc.current_server->prev = new_server;
237
(*current_server)->prev = new_server;
237
238
}
238
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
239
240
if(ret == -1){
240
241
perror_plus("clock_gettime");
241
242
return false;
247
248
* Initialize GPGME.
248
249
*/
249
250
static bool init_gpgme(const char *seckey, const char *pubkey,
250
const char *tempdir){
251
const char *tempdir, mandos_context *mc){
251
252
gpgme_error_t rc;
252
253
gpgme_engine_info_t engine_info;
253
254
254
255
255
/*
256
256
* Helper function to insert pub and seckey to the engine keyring.
257
257
*/
273
273
return false;
274
274
}
275
275
276
rc = gpgme_op_import(mc.ctx, pgp_data);
276
rc = gpgme_op_import(mc->ctx, pgp_data);
277
277
if(rc != GPG_ERR_NO_ERROR){
278
278
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
279
gpgme_strsource(rc), gpgme_strerror(rc));
323
323
}
324
324
325
325
/* Create new GPGME "context" */
326
rc = gpgme_new(&(mc.ctx));
326
rc = gpgme_new(&(mc->ctx));
327
327
if(rc != GPG_ERR_NO_ERROR){
328
328
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
329
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
344
344
*/
345
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
346
size_t crypto_size,
347
char **plaintext){
347
char **plaintext,
348
mandos_context *mc){
348
349
gpgme_data_t dh_crypto, dh_plain;
349
350
gpgme_error_t rc;
350
351
ssize_t ret;
376
377
377
378
/* Decrypt data from the cryptotext data buffer to the plaintext
378
379
data buffer */
379
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
380
381
if(rc != GPG_ERR_NO_ERROR){
381
382
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
382
383
gpgme_strsource(rc), gpgme_strerror(rc));
383
384
plaintext_length = -1;
384
385
if(debug){
385
386
gpgme_decrypt_result_t result;
386
result = gpgme_op_decrypt_result(mc.ctx);
387
result = gpgme_op_decrypt_result(mc->ctx);
387
388
if(result == NULL){
388
389
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
389
390
} else {
467
468
}
468
469
469
470
static const char * safer_gnutls_strerror(int value){
470
const char *ret = gnutls_strerror(value); /* Spurious warning from
471
-Wunreachable-code */
471
const char *ret = gnutls_strerror(value);
472
472
if(ret == NULL)
473
473
ret = "(unknown)";
474
474
return ret;
481
481
}
482
482
483
483
static int init_gnutls_global(const char *pubkeyfilename,
484
const char *seckeyfilename){
484
const char *seckeyfilename,
485
mandos_context *mc){
485
486
int ret;
486
487
487
488
if(debug){
504
505
}
505
506
506
507
/* OpenPGP credentials */
507
ret = gnutls_certificate_allocate_credentials(&mc.cred);
508
ret = gnutls_certificate_allocate_credentials(&mc->cred);
508
509
if(ret != GNUTLS_E_SUCCESS){
509
510
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
510
511
safer_gnutls_strerror(ret));
520
521
}
521
522
522
523
ret = gnutls_certificate_set_openpgp_key_file
523
(mc.cred, pubkeyfilename, seckeyfilename,
524
(mc->cred, pubkeyfilename, seckeyfilename,
524
525
GNUTLS_OPENPGP_FMT_BASE64);
525
526
if(ret != GNUTLS_E_SUCCESS){
526
527
fprintf_plus(stderr,
532
533
}
533
534
534
535
/* GnuTLS server initialization */
535
ret = gnutls_dh_params_init(&mc.dh_params);
536
ret = gnutls_dh_params_init(&mc->dh_params);
536
537
if(ret != GNUTLS_E_SUCCESS){
537
538
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
538
539
" initialization: %s\n",
539
540
safer_gnutls_strerror(ret));
540
541
goto globalfail;
541
542
}
542
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
543
544
if(ret != GNUTLS_E_SUCCESS){
544
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
545
546
safer_gnutls_strerror(ret));
546
547
goto globalfail;
547
548
}
548
549
549
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
550
551
551
552
return 0;
552
553
553
554
globalfail:
554
555
555
gnutls_certificate_free_credentials(mc.cred);
556
gnutls_certificate_free_credentials(mc->cred);
556
557
gnutls_global_deinit();
557
gnutls_dh_params_deinit(mc.dh_params);
558
gnutls_dh_params_deinit(mc->dh_params);
558
559
return -1;
559
560
}
560
561
561
static int init_gnutls_session(gnutls_session_t *session){
562
static int init_gnutls_session(gnutls_session_t *session,
563
mandos_context *mc){
562
564
int ret;
563
565
/* GnuTLS session creation */
564
566
do {
576
578
{
577
579
const char *err;
578
580
do {
579
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
581
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
580
582
if(quit_now){
581
583
gnutls_deinit(*session);
582
584
return -1;
593
595
594
596
do {
595
597
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
596
mc.cred);
598
mc->cred);
597
599
if(quit_now){
598
600
gnutls_deinit(*session);
599
601
return -1;
609
611
/* ignore client certificate if any. */
610
612
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
611
613
612
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
614
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
613
615
614
616
return 0;
615
617
}
619
621
__attribute__((unused)) const char *txt){}
620
622
621
623
/* Called when a Mandos server is found */
622
static int start_mandos_communication(const char *ip, uint16_t port,
624
static int start_mandos_communication(const char *ip, in_port_t port,
623
625
AvahiIfIndex if_index,
624
int af){
626
int af, mandos_context *mc){
625
627
int ret, tcp_sd = -1;
626
628
ssize_t sret;
627
629
union {
657
659
return -1;
658
660
}
659
661
660
ret = init_gnutls_session(&session);
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 */
665
bool match = false;
666
{
667
char *interface = NULL;
668
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
669
interface))){
670
if(if_nametoindex(interface) == (unsigned int)if_index){
671
match = true;
672
break;
673
}
674
}
675
}
676
if(not match){
677
/* This interface does not match any in the list, so we don't
678
connect to the server */
679
if(debug){
680
char interface[IF_NAMESIZE];
681
if(if_indextoname((unsigned int)if_index, interface) == NULL){
682
perror_plus("if_indextoname");
683
} else {
684
fprintf_plus(stderr, "Skipping server on non-used interface"
685
" \"%s\"\n",
686
if_indextoname((unsigned int)if_index,
687
interface));
688
}
689
}
690
return -1;
691
}
692
}
693
694
ret = init_gnutls_session(&session, mc);
661
695
if(ret != 0){
662
696
return -1;
663
697
}
664
698
665
699
if(debug){
666
700
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
667
PRIu16 "\n", ip, port);
701
PRIuMAX "\n", ip, (uintmax_t)port);
668
702
}
669
703
670
704
tcp_sd = socket(pf, SOCK_STREAM, 0);
701
735
goto mandos_end;
702
736
}
703
737
if(af == AF_INET6){
704
to.in6.sin6_port = htons(port); /* Spurious warnings from
705
-Wconversion and
706
-Wunreachable-code */
707
738
to.in6.sin6_port = htons(port);
708
739
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
709
740
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
710
741
-Wunreachable-code*/
734
765
if(if_indextoname((unsigned int)if_index, interface) == NULL){
735
766
perror_plus("if_indextoname");
736
767
} else {
737
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
738
"\n", ip, interface, port);
768
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
769
"\n", ip, interface, (uintmax_t)port);
739
770
}
740
771
} else {
741
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
742
ip, port);
772
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
773
ip, (uintmax_t)port);
743
774
}
744
775
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
745
776
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
938
969
if(buffer_length > 0){
939
970
ssize_t decrypted_buffer_size;
940
971
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
941
&decrypted_buffer);
972
&decrypted_buffer, mc);
942
973
if(decrypted_buffer_size >= 0){
943
974
944
975
written = 0;
1005
1036
AVAHI_GCC_UNUSED AvahiStringList *txt,
1006
1037
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1007
1038
flags,
1008
AVAHI_GCC_UNUSED void* userdata){
1009
assert(r);
1039
void* mc){
1040
if(r == NULL){
1041
return;
1042
}
1010
1043
1011
1044
/* Called whenever a service has been resolved successfully or
1012
1045
timed out */
1021
1054
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1022
1055
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1023
1056
domain,
1024
avahi_strerror(avahi_server_errno(mc.server)));
1057
avahi_strerror(avahi_server_errno
1058
(((mandos_context*)mc)->server)));
1025
1059
break;
1026
1060
1027
1061
case AVAHI_RESOLVER_FOUND:
1033
1067
PRIdMAX ") on port %" PRIu16 "\n", name,
1034
1068
host_name, ip, (intmax_t)interface, port);
1035
1069
}
1036
int ret = start_mandos_communication(ip, port, interface,
1037
avahi_proto_to_af(proto));
1070
int ret = start_mandos_communication(ip, (in_port_t)port,
1071
interface,
1072
avahi_proto_to_af(proto),
1073
mc);
1038
1074
if(ret == 0){
1039
avahi_simple_poll_quit(mc.simple_poll);
1075
avahi_simple_poll_quit(simple_poll);
1040
1076
} else {
1041
if(not add_server(ip, port, interface,
1042
avahi_proto_to_af(proto))){
1077
if(not add_server(ip, (in_port_t)port, interface,
1078
avahi_proto_to_af(proto),
1079
&((mandos_context*)mc)->current_server)){
1043
1080
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1044
1081
" list\n", name);
1045
1082
}
1058
1095
const char *domain,
1059
1096
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1060
1097
flags,
1061
AVAHI_GCC_UNUSED void* userdata){
1062
assert(b);
1098
void* mc){
1099
if(b == NULL){
1100
return;
1101
}
1063
1102
1064
1103
/* Called whenever a new services becomes available on the LAN or
1065
1104
is removed from the LAN */
1073
1112
case AVAHI_BROWSER_FAILURE:
1074
1113
1075
1114
fprintf_plus(stderr, "(Avahi browser) %s\n",
1076
avahi_strerror(avahi_server_errno(mc.server)));
1077
avahi_simple_poll_quit(mc.simple_poll);
1115
avahi_strerror(avahi_server_errno
1116
(((mandos_context*)mc)->server)));
1117
avahi_simple_poll_quit(simple_poll);
1078
1118
return;
1079
1119
1080
1120
case AVAHI_BROWSER_NEW:
1083
1123
the callback function is called the Avahi server will free the
1084
1124
resolver for us. */
1085
1125
1086
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1087
name, type, domain, protocol, 0,
1088
resolve_callback, NULL) == NULL)
1126
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1127
interface, protocol, name, type,
1128
domain, protocol, 0,
1129
resolve_callback, mc) == NULL)
1089
1130
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1090
1131
" %s\n", name,
1091
avahi_strerror(avahi_server_errno(mc.server)));
1132
avahi_strerror(avahi_server_errno
1133
(((mandos_context*)mc)->server)));
1092
1134
break;
1093
1135
1094
1136
case AVAHI_BROWSER_REMOVE:
1113
1155
signal_received = sig;
1114
1156
int old_errno = errno;
1115
1157
/* set main loop to exit */
1116
if(mc.simple_poll != NULL){
1117
avahi_simple_poll_quit(mc.simple_poll);
1158
if(simple_poll != NULL){
1159
avahi_simple_poll_quit(simple_poll);
1118
1160
}
1119
1161
errno = old_errno;
1120
1162
}
1121
1163
1122
1164
bool get_flags(const char *ifname, struct ifreq *ifr){
1123
1165
int ret;
1166
error_t ret_errno;
1124
1167
1125
1168
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1126
1169
if(s < 0){
1170
ret_errno = errno;
1127
1171
perror_plus("socket");
1172
errno = ret_errno;
1128
1173
return false;
1129
1174
}
1130
1175
strcpy(ifr->ifr_name, ifname);
1131
1176
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1132
1177
if(ret == -1){
1133
1178
if(debug){
1179
ret_errno = errno;
1134
1180
perror_plus("ioctl SIOCGIFFLAGS");
1181
errno = ret_errno;
1135
1182
}
1136
1183
return false;
1137
1184
}
1206
1253
}
1207
1254
1208
1255
/*
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.)
1212
*/
1213
int up_interface(const struct dirent *if_entry){
1214
if(if_entry->d_name[0] == '.'){
1215
return 0;
1216
}
1217
1218
struct ifreq ifr;
1219
if(not get_flags(if_entry->d_name, &ifr)){
1220
if(debug){
1221
fprintf_plus(stderr, "Failed to get flags for interface "
1222
"\"%s\"\n", if_entry->d_name);
1223
}
1224
return 0;
1225
}
1226
1227
/* Reject down interfaces */
1228
if(not (ifr.ifr_flags & IFF_UP)){
1229
if(debug){
1230
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1231
if_entry->d_name);
1232
}
1233
return 0;
1234
}
1235
1236
/* Reject non-running interfaces */
1237
if(not (ifr.ifr_flags & IFF_RUNNING)){
1238
if(debug){
1239
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1240
if_entry->d_name);
1241
}
1242
return 0;
1243
}
1244
1245
if(not good_flags(if_entry->d_name, &ifr)){
1246
return 0;
1247
}
1248
return 1;
1256
* This function determines if a network interface is up.
1257
*/
1258
bool interface_is_up(const char *interface){
1259
struct ifreq ifr;
1260
if(not get_flags(interface, &ifr)){
1261
if(debug){
1262
fprintf_plus(stderr, "Failed to get flags for interface "
1263
"\"%s\"\n", interface);
1264
}
1265
return false;
1266
}
1267
1268
return (bool)(ifr.ifr_flags & IFF_UP);
1269
}
1270
1271
/*
1272
* This function determines if a network interface is running
1273
*/
1274
bool interface_is_running(const char *interface){
1275
struct ifreq ifr;
1276
if(not get_flags(interface, &ifr)){
1277
if(debug){
1278
fprintf_plus(stderr, "Failed to get flags for interface "
1279
"\"%s\"\n", interface);
1280
}
1281
return false;
1282
}
1283
1284
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1249
1285
}
1250
1286
1251
1287
int notdotentries(const struct dirent *direntry){
1320
1356
return 1;
1321
1357
}
1322
1358
1323
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1359
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1360
mandos_context *mc){
1324
1361
int ret;
1325
1362
struct timespec now;
1326
1363
struct timespec waited_time;
1327
1364
intmax_t block_time;
1328
1365
1329
1366
while(true){
1330
if(mc.current_server == NULL){
1367
if(mc->current_server == NULL){
1331
1368
if (debug){
1332
1369
fprintf_plus(stderr, "Wait until first server is found."
1333
1370
" No timeout!\n");
1347
1384
/* Calculating in ms how long time between now and server
1348
1385
who we visted longest time ago. Now - last seen. */
1349
1386
waited_time.tv_sec = (now.tv_sec
1350
- mc.current_server->last_seen.tv_sec);
1387
- mc->current_server->last_seen.tv_sec);
1351
1388
waited_time.tv_nsec = (now.tv_nsec
1352
- mc.current_server->last_seen.tv_nsec);
1389
- mc->current_server->last_seen.tv_nsec);
1353
1390
/* total time is 10s/10,000ms.
1354
1391
Converting to s from ms by dividing by 1,000,
1355
1392
and ns to ms by dividing by 1,000,000. */
1363
1400
}
1364
1401
1365
1402
if(block_time <= 0){
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);
1403
ret = start_mandos_communication(mc->current_server->ip,
1404
mc->current_server->port,
1405
mc->current_server->if_index,
1406
mc->current_server->af, mc);
1370
1407
if(ret == 0){
1371
avahi_simple_poll_quit(mc.simple_poll);
1408
avahi_simple_poll_quit(s);
1372
1409
return 0;
1373
1410
}
1374
1411
ret = clock_gettime(CLOCK_MONOTONIC,
1375
&mc.current_server->last_seen);
1412
&mc->current_server->last_seen);
1376
1413
if(ret == -1){
1377
1414
perror_plus("clock_gettime");
1378
1415
return -1;
1379
1416
}
1380
mc.current_server = mc.current_server->next;
1417
mc->current_server = mc->current_server->next;
1381
1418
block_time = 0; /* Call avahi to find new Mandos
1382
1419
servers, but don't block */
1383
1420
}
1393
1430
}
1394
1431
1395
1432
/* Set effective uid to 0, return errno */
1396
int raise_privileges(void){
1397
int old_errno = errno;
1398
int ret_errno = 0;
1399
errno = 0;
1433
error_t raise_privileges(void){
1434
error_t old_errno = errno;
1435
error_t ret_errno = 0;
1400
1436
if(seteuid(0) == -1){
1437
ret_errno = errno;
1401
1438
perror_plus("seteuid");
1402
1439
}
1403
ret_errno = errno;
1404
1440
errno = old_errno;
1405
1441
return ret_errno;
1406
1442
}
1407
1443
1408
1444
/* Set effective and real user ID to 0. Return errno. */
1409
int raise_privileges_permanently(void){
1410
int old_errno = errno;
1411
int ret_errno = raise_privileges();
1445
error_t raise_privileges_permanently(void){
1446
error_t old_errno = errno;
1447
error_t ret_errno = raise_privileges();
1412
1448
if(ret_errno != 0){
1413
1449
errno = old_errno;
1414
1450
return ret_errno;
1415
1451
}
1416
errno = 0;
1417
1452
if(setuid(0) == -1){
1453
ret_errno = errno;
1418
1454
perror_plus("seteuid");
1419
1455
}
1420
ret_errno = errno;
1421
1456
errno = old_errno;
1422
1457
return ret_errno;
1423
1458
}
1424
1459
1425
1460
/* Set effective user ID to unprivileged saved user ID */
1426
int lower_privileges(void){
1427
int old_errno = errno;
1428
int ret_errno = 0;
1429
errno = 0;
1461
error_t lower_privileges(void){
1462
error_t old_errno = errno;
1463
error_t ret_errno = 0;
1430
1464
if(seteuid(uid) == -1){
1465
ret_errno = errno;
1431
1466
perror_plus("seteuid");
1432
1467
}
1433
ret_errno = errno;
1468
errno = old_errno;
1469
return ret_errno;
1470
}
1471
1472
/* Lower privileges permanently */
1473
error_t lower_privileges_permanently(void){
1474
error_t old_errno = errno;
1475
error_t ret_errno = 0;
1476
if(setuid(uid) == -1){
1477
ret_errno = errno;
1478
perror_plus("setuid");
1479
}
1434
1480
errno = old_errno;
1435
1481
return ret_errno;
1436
1482
}
1443
1489
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1444
1490
alphasort);
1445
1491
if(numhooks == -1){
1446
perror_plus("scandir");
1492
if(errno == ENOENT){
1493
if(debug){
1494
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1495
" found\n", hookdir);
1496
}
1497
} else {
1498
perror_plus("scandir");
1499
}
1447
1500
} else {
1448
1501
int devnull = open("/dev/null", O_RDONLY);
1449
1502
for(int i = 0; i < numhooks; i++){
1561
1614
return true;
1562
1615
}
1563
1616
1564
int bring_up_interface(const char * const interface, const float delay){
1617
error_t bring_up_interface(const char *const interface,
1618
const float delay){
1565
1619
int sd = -1;
1566
int ret;
1620
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1567
1623
struct ifreq network;
1568
AvahiIfIndex if_index = (AvahiIfIndex)if_nametoindex(interface);
1624
unsigned int if_index = if_nametoindex(interface);
1569
1625
if(if_index == 0){
1570
1626
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1571
return EX_UNAVAILABLE;
1627
errno = old_errno;
1628
return ENXIO;
1572
1629
}
1573
1630
1574
1631
if(quit_now){
1632
errno = old_errno;
1575
1633
return EINTR;
1576
1634
}
1577
1635
1578
/* Re-raise priviliges */
1579
raise_privileges();
1580
1581
#ifdef __linux__
1582
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1583
messages about the network interface to mess up the prompt */
1584
ret = klogctl(8, NULL, 5);
1585
bool restore_loglevel = true;
1586
if(ret == -1){
1587
restore_loglevel = false;
1588
perror_plus("klogctl");
1589
}
1590
#endif /* __linux__ */
1591
1592
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1593
if(sd < 0){
1594
perror_plus("socket");
1595
#ifdef __linux__
1596
if(restore_loglevel){
1597
ret = klogctl(7, NULL, 0);
1598
if(ret == -1){
1599
perror_plus("klogctl");
1600
}
1601
}
1602
#endif /* __linux__ */
1603
/* Lower privileges */
1604
lower_privileges();
1605
return EX_OSERR;
1606
;
1607
}
1608
strcpy(network.ifr_name, interface);
1609
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1610
if(ret == -1){
1611
perror_plus("ioctl SIOCGIFFLAGS");
1612
#ifdef __linux__
1613
if(restore_loglevel){
1614
ret = klogctl(7, NULL, 0);
1615
if(ret == -1){
1616
perror_plus("klogctl");
1617
}
1618
}
1619
#endif /* __linux__ */
1620
/* Lower privileges */
1621
lower_privileges();
1622
return EX_OSERR;
1623
}
1624
if((network.ifr_flags & IFF_UP) == 0){
1636
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
1638
ret_errno = errno;
1639
fprintf_plus(stderr, "Failed to get flags for interface "
1640
"\"%s\"\n", interface);
1641
return ret_errno;
1642
}
1625
1643
network.ifr_flags |= IFF_UP;
1626
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1644
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1646
if(sd < 0){
1647
ret_errno = errno;
1648
perror_plus("socket");
1649
errno = old_errno;
1650
return ret_errno;
1651
}
1652
1653
if(quit_now){
1654
close(sd);
1655
errno = old_errno;
1656
return EINTR;
1657
}
1658
1659
if(debug){
1660
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1661
interface);
1662
}
1663
1664
/* Raise priviliges */
1665
raise_privileges();
1666
1667
#ifdef __linux__
1668
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1669
messages about the network interface to mess up the prompt */
1670
int ret_linux = klogctl(8, NULL, 5);
1671
bool restore_loglevel = true;
1672
if(ret_linux == -1){
1673
restore_loglevel = false;
1674
perror_plus("klogctl");
1675
}
1676
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1678
ret_errno = errno;
1679
#ifdef __linux__
1680
if(restore_loglevel){
1681
ret_linux = klogctl(7, NULL, 0);
1682
if(ret_linux == -1){
1683
perror_plus("klogctl");
1684
}
1685
}
1686
#endif /* __linux__ */
1687
1688
/* Lower privileges */
1689
lower_privileges();
1690
1691
/* Close the socket */
1692
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1627
1693
if(ret == -1){
1694
perror_plus("close");
1695
}
1696
1697
if(ret_setflags == -1){
1698
errno = ret_errno;
1628
1699
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1629
#ifdef __linux__
1630
if(restore_loglevel){
1631
ret = klogctl(7, NULL, 0);
1632
if(ret == -1){
1633
perror_plus("klogctl");
1634
}
1635
}
1636
#endif /* __linux__ */
1637
/* Lower privileges */
1638
lower_privileges();
1639
return EX_OSERR;
1700
errno = old_errno;
1701
return ret_errno;
1640
1702
}
1703
} else if(debug){
1704
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1705
interface);
1641
1706
}
1707
1642
1708
/* Sleep checking until interface is running.
1643
1709
Check every 0.25s, up to total time of delay */
1644
1710
for(int i=0; i < delay * 4; i++){
1645
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1646
if(ret == -1){
1647
perror_plus("ioctl SIOCGIFFLAGS");
1648
} else if(network.ifr_flags & IFF_RUNNING){
1711
if(interface_is_running(interface)){
1649
1712
break;
1650
1713
}
1651
1714
struct timespec sleeptime = { .tv_nsec = 250000000 };
1654
1717
perror_plus("nanosleep");
1655
1718
}
1656
1719
}
1657
/* Close the socket */
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1659
if(ret == -1){
1660
perror_plus("close");
1720
1721
errno = old_errno;
1722
return 0;
1723
}
1724
1725
error_t take_down_interface(const char *const interface){
1726
int sd = -1;
1727
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1730
struct ifreq network;
1731
unsigned int if_index = if_nametoindex(interface);
1732
if(if_index == 0){
1733
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1734
errno = old_errno;
1735
return ENXIO;
1661
1736
}
1662
#ifdef __linux__
1663
if(restore_loglevel){
1664
/* Restores kernel loglevel to default */
1665
ret = klogctl(7, NULL, 0);
1737
if(interface_is_up(interface)){
1738
if(not get_flags(interface, &network) and debug){
1739
ret_errno = errno;
1740
fprintf_plus(stderr, "Failed to get flags for interface "
1741
"\"%s\"\n", interface);
1742
return ret_errno;
1743
}
1744
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1745
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1747
if(sd < 0){
1748
ret_errno = errno;
1749
perror_plus("socket");
1750
errno = old_errno;
1751
return ret_errno;
1752
}
1753
1754
if(debug){
1755
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1756
interface);
1757
}
1758
1759
/* Raise priviliges */
1760
raise_privileges();
1761
1762
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1763
ret_errno = errno;
1764
1765
/* Lower privileges */
1766
lower_privileges();
1767
1768
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1666
1770
if(ret == -1){
1667
perror_plus("klogctl");
1668
}
1771
perror_plus("close");
1772
}
1773
1774
if(ret_setflags == -1){
1775
errno = ret_errno;
1776
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1777
errno = old_errno;
1778
return ret_errno;
1779
}
1780
} else if(debug){
1781
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1782
interface);
1669
1783
}
1670
#endif /* __linux__ */
1671
/* Lower privileges */
1672
lower_privileges();
1673
return errno;
1784
1785
errno = old_errno;
1786
return 0;
1674
1787
}
1675
1788
1676
1789
int main(int argc, char *argv[]){
1790
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1793
.interfaces = NULL, .interfaces_size = 0 };
1677
1794
AvahiSServiceBrowser *sb = NULL;
1678
int error;
1795
error_t ret_errno;
1679
1796
int ret;
1680
1797
intmax_t tmpmax;
1681
1798
char *tmp;
1682
1799
int exitcode = EXIT_SUCCESS;
1683
const char *interface = "";
1684
struct ifreq network;
1685
int sd = -1;
1686
bool take_down_interface = false;
1800
char *interfaces_to_take_down = NULL;
1801
size_t interfaces_to_take_down_size = 0;
1687
1802
char tempdir[] = "/tmp/mandosXXXXXX";
1688
1803
bool tempdir_created = false;
1689
1804
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1690
1805
const char *seckey = PATHDIR "/" SECKEY;
1691
1806
const char *pubkey = PATHDIR "/" PUBKEY;
1807
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1692
1809
1693
1810
bool gnutls_initialized = false;
1694
1811
bool gpgme_initialized = false;
1785
1902
connect_to = arg;
1786
1903
break;
1787
1904
case 'i': /* --interface */
1788
interface = arg;
1905
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1906
arg, (int)',');
1907
if(ret_errno != 0){
1908
argp_error(state, "%s", strerror(ret_errno));
1909
}
1789
1910
break;
1790
1911
case 's': /* --seckey */
1791
1912
seckey = arg;
1915
2036
}
1916
2037
1917
2038
/* Lower privileges */
1918
errno = 0;
1919
ret = seteuid(uid);
1920
if(ret == -1){
1921
perror_plus("seteuid");
2039
lower_privileges();
2040
}
2041
}
2042
2043
/* Remove invalid interface names (except "none") */
2044
{
2045
char *interface = NULL;
2046
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2047
interface))){
2048
if(strcmp(interface, "none") != 0
2049
and if_nametoindex(interface) == 0){
2050
if(interface[0] != '\0'){
2051
fprintf_plus(stderr, "Not using nonexisting interface"
2052
" \"%s\"\n", interface);
2053
}
2054
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2055
interface = NULL;
1922
2056
}
1923
2057
}
1924
2058
}
1925
2059
1926
2060
/* Run network hooks */
1927
if(not run_network_hooks("start", interface, delay)){
1928
goto end;
2061
{
2062
if(mc.interfaces != NULL){
2063
interfaces_hooks = malloc(mc.interfaces_size);
2064
if(interfaces_hooks == NULL){
2065
perror_plus("malloc");
2066
goto end;
2067
}
2068
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2069
interfaces_hooks_size = mc.interfaces_size;
2070
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2071
(int)',');
2072
}
2073
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2074
interfaces_hooks : "", delay)){
2075
goto end;
2076
}
1929
2077
}
1930
2078
1931
2079
if(not debug){
1932
2080
avahi_set_log_function(empty_log);
1933
2081
}
1934
2082
1935
if(interface[0] == '\0'){
1936
struct dirent **direntries;
1937
/* First look for interfaces that are up */
1938
ret = scandir(sys_class_net, &direntries, up_interface,
1939
alphasort);
1940
if(ret == 0){
1941
/* No up interfaces, look for any good interfaces */
1942
free(direntries);
1943
ret = scandir(sys_class_net, &direntries, good_interface,
1944
alphasort);
1945
}
1946
if(ret >= 1){
1947
/* Pick the first interface returned */
1948
interface = strdup(direntries[0]->d_name);
1949
if(debug){
1950
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1951
}
1952
if(interface == NULL){
1953
perror_plus("malloc");
1954
free(direntries);
1955
exitcode = EXIT_FAILURE;
1956
goto end;
1957
}
1958
free(direntries);
1959
} else {
1960
free(direntries);
1961
fprintf_plus(stderr, "Could not find a network interface\n");
1962
exitcode = EXIT_FAILURE;
1963
goto end;
1964
}
1965
}
1966
1967
2083
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1968
2084
from the signal handler */
1969
2085
/* Initialize the pseudo-RNG for Avahi */
1970
2086
srand((unsigned int) time(NULL));
1971
mc.simple_poll = avahi_simple_poll_new();
1972
if(mc.simple_poll == NULL){
2087
simple_poll = avahi_simple_poll_new();
2088
if(simple_poll == NULL){
1973
2089
fprintf_plus(stderr,
1974
2090
"Avahi: Failed to create simple poll object.\n");
1975
2091
exitcode = EX_UNAVAILABLE;
2039
2155
}
2040
2156
}
2041
2157
2042
/* If the interface is down, bring it up */
2043
if((interface[0] != '\0') and (strcmp(interface, "none") != 0)){
2044
ret = bring_up_interface(interface, delay);
2045
if(ret){
2046
errno = ret;
2047
perror_plus("Failed to bring up interface");
2048
}
2158
/* If no interfaces were specified, make a list */
2159
if(mc.interfaces == NULL){
2160
struct dirent **direntries;
2161
/* Look for any good interfaces */
2162
ret = scandir(sys_class_net, &direntries, good_interface,
2163
alphasort);
2164
if(ret >= 1){
2165
/* Add all found interfaces to interfaces list */
2166
for(int i = 0; i < ret; ++i){
2167
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
direntries[i]->d_name);
2169
if(ret_errno != 0){
2170
perror_plus("argz_add");
2171
continue;
2172
}
2173
if(debug){
2174
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2175
direntries[i]->d_name);
2176
}
2177
}
2178
free(direntries);
2179
} else {
2180
free(direntries);
2181
fprintf_plus(stderr, "Could not find a network interface\n");
2182
exitcode = EXIT_FAILURE;
2183
goto end;
2184
}
2185
}
2186
2187
/* Bring up interfaces which are down, and remove any "none"s */
2188
{
2189
char *interface = NULL;
2190
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2191
interface))){
2192
/* If interface name is "none", stop bringing up interfaces.
2193
Also remove all instances of "none" from the list */
2194
if(strcmp(interface, "none") == 0){
2195
argz_delete(&mc.interfaces, &mc.interfaces_size,
2196
interface);
2197
interface = NULL;
2198
while((interface = argz_next(mc.interfaces,
2199
mc.interfaces_size, interface))){
2200
if(strcmp(interface, "none") == 0){
2201
argz_delete(&mc.interfaces, &mc.interfaces_size,
2202
interface);
2203
interface = NULL;
2204
}
2205
}
2206
break;
2207
}
2208
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
2210
if(not interface_was_up){
2211
if(ret != 0){
2212
errno = ret;
2213
perror_plus("Failed to bring up interface");
2214
} else {
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2217
interface);
2218
}
2219
}
2220
}
2221
if(debug and (interfaces_to_take_down == NULL)){
2222
fprintf_plus(stderr, "No interfaces were brought up\n");
2223
}
2224
}
2225
2226
/* If we only got one interface, explicitly use only that one */
2227
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2228
if(debug){
2229
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2230
mc.interfaces);
2231
}
2232
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2049
2233
}
2050
2234
2051
2235
if(quit_now){
2052
2236
goto end;
2053
2237
}
2054
2238
2055
ret = init_gnutls_global(pubkey, seckey);
2239
ret = init_gnutls_global(pubkey, seckey, &mc);
2056
2240
if(ret == -1){
2057
2241
fprintf_plus(stderr, "init_gnutls_global failed\n");
2058
2242
exitcode = EX_UNAVAILABLE;
2075
2259
goto end;
2076
2260
}
2077
2261
2078
if(not init_gpgme(pubkey, seckey, tempdir)){
2262
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2079
2263
fprintf_plus(stderr, "init_gpgme failed\n");
2080
2264
exitcode = EX_UNAVAILABLE;
2081
2265
goto end;
2102
2286
goto end;
2103
2287
}
2104
2288
2105
uint16_t port;
2289
in_port_t port;
2106
2290
errno = 0;
2107
2291
tmpmax = strtoimax(address+1, &tmp, 10);
2108
2292
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2109
or tmpmax != (uint16_t)tmpmax){
2293
or tmpmax != (in_port_t)tmpmax){
2110
2294
fprintf_plus(stderr, "Bad port number\n");
2111
2295
exitcode = EX_USAGE;
2112
2296
goto end;
2113
2297
}
2114
2298
2115
2299
if(quit_now){
2116
2300
goto end;
2117
2301
}
2118
2302
2119
port = (uint16_t)tmpmax;
2303
port = (in_port_t)tmpmax;
2120
2304
*address = '\0';
2121
2305
/* Colon in address indicates IPv6 */
2122
2306
int af;
2138
2322
}
2139
2323
2140
2324
while(not quit_now){
2141
ret = start_mandos_communication(address, port, if_index, af);
2325
ret = start_mandos_communication(address, port, if_index, af,
2326
&mc);
2142
2327
if(quit_now or ret == 0){
2143
2328
break;
2144
2329
}
2170
2355
config.publish_domain = 0;
2171
2356
2172
2357
/* Allocate a new server */
2173
mc.server = avahi_server_new(avahi_simple_poll_get
2174
(mc.simple_poll), &config, NULL,
2175
NULL, &error);
2358
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2359
&config, NULL, NULL, &ret_errno);
2176
2360
2177
2361
/* Free the Avahi configuration data */
2178
2362
avahi_server_config_free(&config);
2181
2365
/* Check if creating the Avahi server object succeeded */
2182
2366
if(mc.server == NULL){
2183
2367
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2184
avahi_strerror(error));
2368
avahi_strerror(ret_errno));
2185
2369
exitcode = EX_UNAVAILABLE;
2186
2370
goto end;
2187
2371
}
2193
2377
/* Create the Avahi service browser */
2194
2378
sb = avahi_s_service_browser_new(mc.server, if_index,
2195
2379
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2196
NULL, 0, browse_callback, NULL);
2380
NULL, 0, browse_callback,
2381
(void *)&mc);
2197
2382
if(sb == NULL){
2198
2383
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2199
2384
avahi_strerror(avahi_server_errno(mc.server)));
2211
2396
fprintf_plus(stderr, "Starting Avahi loop search\n");
2212
2397
}
2213
2398
2214
ret = avahi_loop_with_timeout(mc.simple_poll,
2215
(int)(retry_interval * 1000));
2399
ret = avahi_loop_with_timeout(simple_poll,
2400
(int)(retry_interval * 1000), &mc);
2216
2401
if(debug){
2217
2402
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2218
2403
(ret == 0) ? "successfully" : "with error");
2225
2410
}
2226
2411
2227
2412
/* Cleanup things */
2413
free(mc.interfaces);
2414
2228
2415
if(sb != NULL)
2229
2416
avahi_s_service_browser_free(sb);
2230
2417
2231
2418
if(mc.server != NULL)
2232
2419
avahi_server_free(mc.server);
2233
2420
2234
if(mc.simple_poll != NULL)
2235
avahi_simple_poll_free(mc.simple_poll);
2421
if(simple_poll != NULL)
2422
avahi_simple_poll_free(simple_poll);
2236
2423
2237
2424
if(gnutls_initialized){
2238
2425
gnutls_certificate_free_credentials(mc.cred);
2255
2442
}
2256
2443
}
2257
2444
2258
/* Run network hooks */
2259
run_network_hooks("stop", interface, delay);
2260
2261
2445
/* Re-raise priviliges */
2262
2446
{
2263
2447
raise_privileges();
2264
2448
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
2267
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2268
if(ret == -1){
2269
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
2271
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2273
if(ret == -1){
2274
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2449
/* Run network hooks */
2450
run_network_hooks("stop", interfaces_hooks != NULL ?
2451
interfaces_hooks : "", delay);
2452
2453
/* Take down the network interfaces which were brought up */
2454
{
2455
char *interface = NULL;
2456
while((interface=argz_next(interfaces_to_take_down,
2457
interfaces_to_take_down_size,
2458
interface))){
2459
ret_errno = take_down_interface(interface);
2460
if(ret_errno != 0){
2461
errno = ret_errno;
2462
perror_plus("Failed to take down interface");
2275
2463
}
2276
2464
}
2277
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2278
if(ret == -1){
2279
perror_plus("close");
2465
if(debug and (interfaces_to_take_down == NULL)){
2466
fprintf_plus(stderr, "No interfaces needed to be taken"
2467
" down\n");
2280
2468
}
2281
2469
}
2282
}
2283
/* Lower privileges permanently */
2284
errno = 0;
2285
ret = setuid(uid);
2286
if(ret == -1){
2287
perror_plus("setuid");
2288
}
2470
2471
lower_privileges_permanently();
2472
}
2473
2474
free(interfaces_to_take_down);
2475
free(interfaces_hooks);
2289
2476
2290
2477
/* Removes the GPGME temp directory and all files inside */
2291
2478
if(tempdir_created){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0