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- Committer: Teddy Hogeborn
- Date: 2012-05-03 18:51:48 UTC
- Revision ID: teddy@recompile.se-20120503185148-gm8kzvl4z216oaij
* mandos-monitor: Use new string format method.
- files removed:
- debian/mandos-client.examples
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
44
#include <stdint.h> /* uint16_t, uint32_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
61
61
*/
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
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(),
93
argz_count() */
94
91
95
92
#ifdef __linux__
96
93
#include <sys/klog.h> /* klogctl() */
138
135
static const char sys_class_net[] = "/sys/class/net";
139
136
char *connect_to = NULL;
140
137
const char *hookdir = HOOKDIR;
141
uid_t uid = 65534;
142
gid_t gid = 65534;
143
138
144
139
/* Doubly linked list that need to be circularly linked when used */
145
140
typedef struct server{
146
141
const char *ip;
147
in_port_t port;
142
uint16_t port;
148
143
AvahiIfIndex if_index;
149
144
int af;
150
145
struct timespec last_seen;
154
149
155
150
/* Used for passing in values through the Avahi callback functions */
156
151
typedef struct {
152
AvahiSimplePoll *simple_poll;
157
153
AvahiServer *server;
158
154
gnutls_certificate_credentials_t cred;
159
155
unsigned int dh_bits;
161
157
const char *priority;
162
158
gpgme_ctx_t ctx;
163
159
server *current_server;
164
char *interfaces;
165
size_t interfaces_size;
166
160
} mandos_context;
167
161
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
162
/* global context so signal handler can reach it*/
163
mandos_context mc = { .simple_poll = NULL, .server = NULL,
164
.dh_bits = 1024, .priority = "SECURE256"
165
":!CTYPE-X.509:+CTYPE-OPENPGP",
166
.current_server = NULL };
170
167
171
168
sig_atomic_t quit_now = 0;
172
169
int signal_received = 0;
208
205
}
209
206
210
207
/* 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){
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
213
210
int ret;
214
211
server *new_server = malloc(sizeof(server));
215
212
if(new_server == NULL){
225
222
return false;
226
223
}
227
224
/* Special case of first server */
228
if(*current_server == NULL){
225
if (mc.current_server == NULL){
229
226
new_server->next = new_server;
230
227
new_server->prev = new_server;
231
*current_server = new_server;
228
mc.current_server = new_server;
232
229
/* Place the new server last in the list */
233
230
} else {
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
231
new_server->next = mc.current_server;
232
new_server->prev = mc.current_server->prev;
236
233
new_server->prev->next = new_server;
237
(*current_server)->prev = new_server;
234
mc.current_server->prev = new_server;
238
235
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
240
237
if(ret == -1){
241
238
perror_plus("clock_gettime");
242
239
return false;
248
245
* Initialize GPGME.
249
246
*/
250
247
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
248
const char *tempdir){
252
249
gpgme_error_t rc;
253
250
gpgme_engine_info_t engine_info;
254
251
252
255
253
/*
256
254
* Helper function to insert pub and seckey to the engine keyring.
257
255
*/
273
271
return false;
274
272
}
275
273
276
rc = gpgme_op_import(mc->ctx, pgp_data);
274
rc = gpgme_op_import(mc.ctx, pgp_data);
277
275
if(rc != GPG_ERR_NO_ERROR){
278
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
277
gpgme_strsource(rc), gpgme_strerror(rc));
323
321
}
324
322
325
323
/* Create new GPGME "context" */
326
rc = gpgme_new(&(mc->ctx));
324
rc = gpgme_new(&(mc.ctx));
327
325
if(rc != GPG_ERR_NO_ERROR){
328
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
329
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
344
342
*/
345
343
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
344
size_t crypto_size,
347
char **plaintext,
348
mandos_context *mc){
345
char **plaintext){
349
346
gpgme_data_t dh_crypto, dh_plain;
350
347
gpgme_error_t rc;
351
348
ssize_t ret;
377
374
378
375
/* Decrypt data from the cryptotext data buffer to the plaintext
379
376
data buffer */
380
rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
381
378
if(rc != GPG_ERR_NO_ERROR){
382
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
383
380
gpgme_strsource(rc), gpgme_strerror(rc));
384
381
plaintext_length = -1;
385
382
if(debug){
386
383
gpgme_decrypt_result_t result;
387
result = gpgme_op_decrypt_result(mc->ctx);
384
result = gpgme_op_decrypt_result(mc.ctx);
388
385
if(result == NULL){
389
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
390
387
} else {
468
465
}
469
466
470
467
static const char * safer_gnutls_strerror(int value){
471
const char *ret = gnutls_strerror(value);
468
const char *ret = gnutls_strerror(value); /* Spurious warning from
469
-Wunreachable-code */
472
470
if(ret == NULL)
473
471
ret = "(unknown)";
474
472
return ret;
481
479
}
482
480
483
481
static int init_gnutls_global(const char *pubkeyfilename,
484
const char *seckeyfilename,
485
mandos_context *mc){
482
const char *seckeyfilename){
486
483
int ret;
487
484
488
485
if(debug){
505
502
}
506
503
507
504
/* OpenPGP credentials */
508
ret = gnutls_certificate_allocate_credentials(&mc->cred);
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
509
506
if(ret != GNUTLS_E_SUCCESS){
510
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
511
508
safer_gnutls_strerror(ret));
521
518
}
522
519
523
520
ret = gnutls_certificate_set_openpgp_key_file
524
(mc->cred, pubkeyfilename, seckeyfilename,
521
(mc.cred, pubkeyfilename, seckeyfilename,
525
522
GNUTLS_OPENPGP_FMT_BASE64);
526
523
if(ret != GNUTLS_E_SUCCESS){
527
524
fprintf_plus(stderr,
533
530
}
534
531
535
532
/* GnuTLS server initialization */
536
ret = gnutls_dh_params_init(&mc->dh_params);
533
ret = gnutls_dh_params_init(&mc.dh_params);
537
534
if(ret != GNUTLS_E_SUCCESS){
538
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
536
" initialization: %s\n",
540
537
safer_gnutls_strerror(ret));
541
538
goto globalfail;
542
539
}
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
544
541
if(ret != GNUTLS_E_SUCCESS){
545
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
543
safer_gnutls_strerror(ret));
547
544
goto globalfail;
548
545
}
549
546
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
547
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
551
548
552
549
return 0;
553
550
554
551
globalfail:
555
552
556
gnutls_certificate_free_credentials(mc->cred);
553
gnutls_certificate_free_credentials(mc.cred);
557
554
gnutls_global_deinit();
558
gnutls_dh_params_deinit(mc->dh_params);
555
gnutls_dh_params_deinit(mc.dh_params);
559
556
return -1;
560
557
}
561
558
562
static int init_gnutls_session(gnutls_session_t *session,
563
mandos_context *mc){
559
static int init_gnutls_session(gnutls_session_t *session){
564
560
int ret;
565
561
/* GnuTLS session creation */
566
562
do {
578
574
{
579
575
const char *err;
580
576
do {
581
ret = gnutls_priority_set_direct(*session, mc->priority, &err);
577
ret = gnutls_priority_set_direct(*session, mc.priority, &err);
582
578
if(quit_now){
583
579
gnutls_deinit(*session);
584
580
return -1;
595
591
596
592
do {
597
593
ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,
598
mc->cred);
594
mc.cred);
599
595
if(quit_now){
600
596
gnutls_deinit(*session);
601
597
return -1;
611
607
/* ignore client certificate if any. */
612
608
gnutls_certificate_server_set_request(*session, GNUTLS_CERT_IGNORE);
613
609
614
gnutls_dh_set_prime_bits(*session, mc->dh_bits);
610
gnutls_dh_set_prime_bits(*session, mc.dh_bits);
615
611
616
612
return 0;
617
613
}
621
617
__attribute__((unused)) const char *txt){}
622
618
623
619
/* Called when a Mandos server is found */
624
static int start_mandos_communication(const char *ip, in_port_t port,
620
static int start_mandos_communication(const char *ip, uint16_t port,
625
621
AvahiIfIndex if_index,
626
int af, mandos_context *mc){
622
int af){
627
623
int ret, tcp_sd = -1;
628
624
ssize_t sret;
629
625
union {
659
655
return -1;
660
656
}
661
657
662
ret = init_gnutls_session(&session, mc);
658
ret = init_gnutls_session(&session);
663
659
if(ret != 0){
664
660
return -1;
665
661
}
666
662
667
663
if(debug){
668
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
669
PRIuMAX "\n", ip, (uintmax_t)port);
665
PRIu16 "\n", ip, port);
670
666
}
671
667
672
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
703
699
goto mandos_end;
704
700
}
705
701
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
702
to.in6.sin6_port = htons(port); /* Spurious warnings from
703
-Wconversion and
704
-Wunreachable-code */
705
707
706
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
708
-Wunreachable-code*/
733
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
734
733
perror_plus("if_indextoname");
735
734
} else {
736
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
737
"\n", ip, interface, (uintmax_t)port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
738
737
}
739
738
} else {
740
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
741
ip, (uintmax_t)port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
742
741
}
743
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
822
821
goto mandos_end;
823
822
}
824
823
825
/* This casting via intptr_t is to eliminate warning about casting
826
an int to a pointer type. This is exactly how the GnuTLS Guile
827
function "set-session-transport-fd!" does it. */
828
gnutls_transport_set_ptr(session,
829
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
824
/* Spurious warning from -Wint-to-pointer-cast */
825
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
830
826
831
827
if(quit_now){
832
828
errno = EINTR;
937
933
if(buffer_length > 0){
938
934
ssize_t decrypted_buffer_size;
939
935
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
940
&decrypted_buffer, mc);
936
&decrypted_buffer);
941
937
if(decrypted_buffer_size >= 0){
942
938
943
939
written = 0;
1004
1000
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
1001
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1002
flags,
1007
void* mc){
1008
if(r == NULL){
1009
return;
1010
}
1003
AVAHI_GCC_UNUSED void* userdata){
1004
assert(r);
1011
1005
1012
1006
/* Called whenever a service has been resolved successfully or
1013
1007
timed out */
1022
1016
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1023
1017
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1024
1018
domain,
1025
avahi_strerror(avahi_server_errno
1026
(((mandos_context*)mc)->server)));
1019
avahi_strerror(avahi_server_errno(mc.server)));
1027
1020
break;
1028
1021
1029
1022
case AVAHI_RESOLVER_FOUND:
1035
1028
PRIdMAX ") on port %" PRIu16 "\n", name,
1036
1029
host_name, ip, (intmax_t)interface, port);
1037
1030
}
1038
int ret = start_mandos_communication(ip, (in_port_t)port,
1039
interface,
1040
avahi_proto_to_af(proto),
1041
mc);
1031
int ret = start_mandos_communication(ip, port, interface,
1032
avahi_proto_to_af(proto));
1042
1033
if(ret == 0){
1043
avahi_simple_poll_quit(simple_poll);
1034
avahi_simple_poll_quit(mc.simple_poll);
1044
1035
} else {
1045
if(not add_server(ip, (in_port_t)port, interface,
1046
avahi_proto_to_af(proto),
1047
&((mandos_context*)mc)->current_server)){
1036
if(not add_server(ip, port, interface,
1037
avahi_proto_to_af(proto))){
1048
1038
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1049
1039
" list\n", name);
1050
1040
}
1063
1053
const char *domain,
1064
1054
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1065
1055
flags,
1066
void* mc){
1067
if(b == NULL){
1068
return;
1069
}
1056
AVAHI_GCC_UNUSED void* userdata){
1057
assert(b);
1070
1058
1071
1059
/* Called whenever a new services becomes available on the LAN or
1072
1060
is removed from the LAN */
1080
1068
case AVAHI_BROWSER_FAILURE:
1081
1069
1082
1070
fprintf_plus(stderr, "(Avahi browser) %s\n",
1083
avahi_strerror(avahi_server_errno
1084
(((mandos_context*)mc)->server)));
1085
avahi_simple_poll_quit(simple_poll);
1071
avahi_strerror(avahi_server_errno(mc.server)));
1072
avahi_simple_poll_quit(mc.simple_poll);
1086
1073
return;
1087
1074
1088
1075
case AVAHI_BROWSER_NEW:
1091
1078
the callback function is called the Avahi server will free the
1092
1079
resolver for us. */
1093
1080
1094
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1095
interface, protocol, name, type,
1096
domain, protocol, 0,
1097
resolve_callback, mc) == NULL)
1081
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1082
name, type, domain, protocol, 0,
1083
resolve_callback, NULL) == NULL)
1098
1084
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1099
1085
" %s\n", name,
1100
avahi_strerror(avahi_server_errno
1101
(((mandos_context*)mc)->server)));
1086
avahi_strerror(avahi_server_errno(mc.server)));
1102
1087
break;
1103
1088
1104
1089
case AVAHI_BROWSER_REMOVE:
1123
1108
signal_received = sig;
1124
1109
int old_errno = errno;
1125
1110
/* set main loop to exit */
1126
if(simple_poll != NULL){
1127
avahi_simple_poll_quit(simple_poll);
1111
if(mc.simple_poll != NULL){
1112
avahi_simple_poll_quit(mc.simple_poll);
1128
1113
}
1129
1114
errno = old_errno;
1130
1115
}
1131
1116
1132
1117
bool get_flags(const char *ifname, struct ifreq *ifr){
1133
1118
int ret;
1134
error_t ret_errno;
1135
1119
1136
1120
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1137
1121
if(s < 0){
1138
ret_errno = errno;
1139
1122
perror_plus("socket");
1140
errno = ret_errno;
1141
1123
return false;
1142
1124
}
1143
1125
strcpy(ifr->ifr_name, ifname);
1144
1126
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
1127
if(ret == -1){
1146
1128
if(debug){
1147
ret_errno = errno;
1148
1129
perror_plus("ioctl SIOCGIFFLAGS");
1149
errno = ret_errno;
1150
1130
}
1151
1131
return false;
1152
1132
}
1221
1201
}
1222
1202
1223
1203
/*
1224
* This function determines if a network interface is up.
1225
*/
1226
bool interface_is_up(const char *interface){
1227
struct ifreq ifr;
1228
if(not get_flags(interface, &ifr)){
1229
if(debug){
1230
fprintf_plus(stderr, "Failed to get flags for interface "
1231
"\"%s\"\n", interface);
1232
}
1233
return false;
1234
}
1235
1236
return (bool)(ifr.ifr_flags & IFF_UP);
1237
}
1238
1239
/*
1240
* This function determines if a network interface is running
1241
*/
1242
bool interface_is_running(const char *interface){
1243
struct ifreq ifr;
1244
if(not get_flags(interface, &ifr)){
1245
if(debug){
1246
fprintf_plus(stderr, "Failed to get flags for interface "
1247
"\"%s\"\n", interface);
1248
}
1249
return false;
1250
}
1251
1252
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1204
* This function determines if a directory entry in /sys/class/net
1205
* corresponds to an acceptable network device which is up.
1206
* (This function is passed to scandir(3) as a filter function.)
1207
*/
1208
int up_interface(const struct dirent *if_entry){
1209
if(if_entry->d_name[0] == '.'){
1210
return 0;
1211
}
1212
1213
struct ifreq ifr;
1214
if(not get_flags(if_entry->d_name, &ifr)){
1215
if(debug){
1216
fprintf_plus(stderr, "Failed to get flags for interface "
1217
"\"%s\"\n", if_entry->d_name);
1218
}
1219
return 0;
1220
}
1221
1222
/* Reject down interfaces */
1223
if(not (ifr.ifr_flags & IFF_UP)){
1224
if(debug){
1225
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1226
if_entry->d_name);
1227
}
1228
return 0;
1229
}
1230
1231
/* Reject non-running interfaces */
1232
if(not (ifr.ifr_flags & IFF_RUNNING)){
1233
if(debug){
1234
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1235
if_entry->d_name);
1236
}
1237
return 0;
1238
}
1239
1240
if(not good_flags(if_entry->d_name, &ifr)){
1241
return 0;
1242
}
1243
return 1;
1253
1244
}
1254
1245
1255
1246
int notdotentries(const struct dirent *direntry){
1324
1315
return 1;
1325
1316
}
1326
1317
1327
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1328
mandos_context *mc){
1318
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1329
1319
int ret;
1330
1320
struct timespec now;
1331
1321
struct timespec waited_time;
1332
1322
intmax_t block_time;
1333
1323
1334
1324
while(true){
1335
if(mc->current_server == NULL){
1325
if(mc.current_server == NULL){
1336
1326
if (debug){
1337
1327
fprintf_plus(stderr, "Wait until first server is found."
1338
1328
" No timeout!\n");
1352
1342
/* Calculating in ms how long time between now and server
1353
1343
who we visted longest time ago. Now - last seen. */
1354
1344
waited_time.tv_sec = (now.tv_sec
1355
- mc->current_server->last_seen.tv_sec);
1345
- mc.current_server->last_seen.tv_sec);
1356
1346
waited_time.tv_nsec = (now.tv_nsec
1357
- mc->current_server->last_seen.tv_nsec);
1347
- mc.current_server->last_seen.tv_nsec);
1358
1348
/* total time is 10s/10,000ms.
1359
1349
Converting to s from ms by dividing by 1,000,
1360
1350
and ns to ms by dividing by 1,000,000. */
1368
1358
}
1369
1359
1370
1360
if(block_time <= 0){
1371
ret = start_mandos_communication(mc->current_server->ip,
1372
mc->current_server->port,
1373
mc->current_server->if_index,
1374
mc->current_server->af, mc);
1361
ret = start_mandos_communication(mc.current_server->ip,
1362
mc.current_server->port,
1363
mc.current_server->if_index,
1364
mc.current_server->af);
1375
1365
if(ret == 0){
1376
avahi_simple_poll_quit(s);
1366
avahi_simple_poll_quit(mc.simple_poll);
1377
1367
return 0;
1378
1368
}
1379
1369
ret = clock_gettime(CLOCK_MONOTONIC,
1380
&mc->current_server->last_seen);
1370
&mc.current_server->last_seen);
1381
1371
if(ret == -1){
1382
1372
perror_plus("clock_gettime");
1383
1373
return -1;
1384
1374
}
1385
mc->current_server = mc->current_server->next;
1375
mc.current_server = mc.current_server->next;
1386
1376
block_time = 0; /* Call avahi to find new Mandos
1387
1377
servers, but don't block */
1388
1378
}
1397
1387
}
1398
1388
}
1399
1389
1400
/* Set effective uid to 0, return errno */
1401
error_t raise_privileges(void){
1402
error_t old_errno = errno;
1403
error_t ret_errno = 0;
1404
if(seteuid(0) == -1){
1405
ret_errno = errno;
1406
perror_plus("seteuid");
1407
}
1408
errno = old_errno;
1409
return ret_errno;
1410
}
1411
1412
/* Set effective and real user ID to 0. Return errno. */
1413
error_t raise_privileges_permanently(void){
1414
error_t old_errno = errno;
1415
error_t ret_errno = raise_privileges();
1416
if(ret_errno != 0){
1417
errno = old_errno;
1418
return ret_errno;
1419
}
1420
if(setuid(0) == -1){
1421
ret_errno = errno;
1422
perror_plus("seteuid");
1423
}
1424
errno = old_errno;
1425
return ret_errno;
1426
}
1427
1428
/* Set effective user ID to unprivileged saved user ID */
1429
error_t lower_privileges(void){
1430
error_t old_errno = errno;
1431
error_t ret_errno = 0;
1432
if(seteuid(uid) == -1){
1433
ret_errno = errno;
1434
perror_plus("seteuid");
1435
}
1436
errno = old_errno;
1437
return ret_errno;
1438
}
1439
1440
/* Lower privileges permanently */
1441
error_t lower_privileges_permanently(void){
1442
error_t old_errno = errno;
1443
error_t ret_errno = 0;
1444
if(setuid(uid) == -1){
1445
ret_errno = errno;
1446
perror_plus("setuid");
1447
}
1448
errno = old_errno;
1449
return ret_errno;
1450
}
1451
1452
1390
bool run_network_hooks(const char *mode, const char *interface,
1453
1391
const float delay){
1454
1392
struct dirent **direntries;
1457
1395
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1458
1396
alphasort);
1459
1397
if(numhooks == -1){
1460
if(errno == ENOENT){
1461
if(debug){
1462
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1463
" found\n", hookdir);
1464
}
1465
} else {
1466
perror_plus("scandir");
1467
}
1398
perror_plus("scandir");
1468
1399
} else {
1469
1400
int devnull = open("/dev/null", O_RDONLY);
1470
1401
for(int i = 0; i < numhooks; i++){
1483
1414
if(hook_pid == 0){
1484
1415
/* Child */
1485
1416
/* Raise privileges */
1486
raise_privileges_permanently();
1417
errno = 0;
1418
ret = seteuid(0);
1419
if(ret == -1){
1420
perror_plus("seteuid");
1421
}
1422
/* Raise privileges even more */
1423
errno = 0;
1424
ret = setuid(0);
1425
if(ret == -1){
1426
perror_plus("setuid");
1427
}
1487
1428
/* Set group */
1488
1429
errno = 0;
1489
1430
ret = setgid(0);
1582
1523
return true;
1583
1524
}
1584
1525
1585
error_t bring_up_interface(const char *const interface,
1586
const float delay){
1587
int sd = -1;
1588
error_t old_errno = errno;
1589
error_t ret_errno = 0;
1590
int ret, ret_setflags;
1591
struct ifreq network;
1592
unsigned int if_index = if_nametoindex(interface);
1593
if(if_index == 0){
1594
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1595
errno = old_errno;
1596
return ENXIO;
1597
}
1598
1599
if(quit_now){
1600
errno = old_errno;
1601
return EINTR;
1602
}
1603
1604
if(not interface_is_up(interface)){
1605
if(not get_flags(interface, &network) and debug){
1606
ret_errno = errno;
1607
fprintf_plus(stderr, "Failed to get flags for interface "
1608
"\"%s\"\n", interface);
1609
return ret_errno;
1610
}
1611
network.ifr_flags |= IFF_UP;
1612
1613
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1614
if(sd < 0){
1615
ret_errno = errno;
1616
perror_plus("socket");
1617
errno = old_errno;
1618
return ret_errno;
1619
}
1620
1621
if(quit_now){
1622
close(sd);
1623
errno = old_errno;
1624
return EINTR;
1625
}
1626
1627
if(debug){
1628
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1629
interface);
1630
}
1631
1632
/* Raise priviliges */
1633
raise_privileges();
1634
1635
#ifdef __linux__
1636
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1637
messages about the network interface to mess up the prompt */
1638
int ret_linux = klogctl(8, NULL, 5);
1639
bool restore_loglevel = true;
1640
if(ret_linux == -1){
1641
restore_loglevel = false;
1642
perror_plus("klogctl");
1643
}
1644
#endif /* __linux__ */
1645
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1646
ret_errno = errno;
1647
#ifdef __linux__
1648
if(restore_loglevel){
1649
ret_linux = klogctl(7, NULL, 0);
1650
if(ret_linux == -1){
1651
perror_plus("klogctl");
1652
}
1653
}
1654
#endif /* __linux__ */
1655
1656
/* Lower privileges */
1657
lower_privileges();
1658
1659
/* Close the socket */
1660
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1661
if(ret == -1){
1662
perror_plus("close");
1663
}
1664
1665
if(ret_setflags == -1){
1666
errno = ret_errno;
1667
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1668
errno = old_errno;
1669
return ret_errno;
1670
}
1671
} else if(debug){
1672
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1673
interface);
1674
}
1675
1676
/* Sleep checking until interface is running.
1677
Check every 0.25s, up to total time of delay */
1678
for(int i=0; i < delay * 4; i++){
1679
if(interface_is_running(interface)){
1680
break;
1681
}
1682
struct timespec sleeptime = { .tv_nsec = 250000000 };
1683
ret = nanosleep(&sleeptime, NULL);
1684
if(ret == -1 and errno != EINTR){
1685
perror_plus("nanosleep");
1686
}
1687
}
1688
1689
errno = old_errno;
1690
return 0;
1691
}
1692
1693
error_t take_down_interface(const char *const interface){
1694
int sd = -1;
1695
error_t old_errno = errno;
1696
error_t ret_errno = 0;
1697
int ret, ret_setflags;
1698
struct ifreq network;
1699
unsigned int if_index = if_nametoindex(interface);
1700
if(if_index == 0){
1701
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1702
errno = old_errno;
1703
return ENXIO;
1704
}
1705
if(interface_is_up(interface)){
1706
if(not get_flags(interface, &network) and debug){
1707
ret_errno = errno;
1708
fprintf_plus(stderr, "Failed to get flags for interface "
1709
"\"%s\"\n", interface);
1710
return ret_errno;
1711
}
1712
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1713
1714
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1715
if(sd < 0){
1716
ret_errno = errno;
1717
perror_plus("socket");
1718
errno = old_errno;
1719
return ret_errno;
1720
}
1721
1722
if(debug){
1723
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1724
interface);
1725
}
1726
1727
/* Raise priviliges */
1728
raise_privileges();
1729
1730
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1731
ret_errno = errno;
1732
1733
/* Lower privileges */
1734
lower_privileges();
1735
1736
/* Close the socket */
1737
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1738
if(ret == -1){
1739
perror_plus("close");
1740
}
1741
1742
if(ret_setflags == -1){
1743
errno = ret_errno;
1744
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1745
errno = old_errno;
1746
return ret_errno;
1747
}
1748
} else if(debug){
1749
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1750
interface);
1751
}
1752
1753
errno = old_errno;
1754
return 0;
1755
}
1756
1757
1526
int main(int argc, char *argv[]){
1758
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1759
.priority = "SECURE256:!CTYPE-X.509:"
1760
"+CTYPE-OPENPGP", .current_server = NULL,
1761
.interfaces = NULL, .interfaces_size = 0 };
1762
1527
AvahiSServiceBrowser *sb = NULL;
1763
error_t ret_errno;
1528
int error;
1764
1529
int ret;
1765
1530
intmax_t tmpmax;
1766
1531
char *tmp;
1767
1532
int exitcode = EXIT_SUCCESS;
1768
char *interfaces_to_take_down = NULL;
1769
size_t interfaces_to_take_down_size = 0;
1533
const char *interface = "";
1534
struct ifreq network;
1535
int sd = -1;
1536
bool take_down_interface = false;
1537
uid_t uid;
1538
gid_t gid;
1770
1539
char tempdir[] = "/tmp/mandosXXXXXX";
1771
1540
bool tempdir_created = false;
1772
1541
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1773
1542
const char *seckey = PATHDIR "/" SECKEY;
1774
1543
const char *pubkey = PATHDIR "/" PUBKEY;
1775
char *interfaces_hooks = NULL;
1776
size_t interfaces_hooks_size = 0;
1777
1544
1778
1545
bool gnutls_initialized = false;
1779
1546
bool gpgme_initialized = false;
1870
1637
connect_to = arg;
1871
1638
break;
1872
1639
case 'i': /* --interface */
1873
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1874
arg, (int)',');
1875
if(ret_errno != 0){
1876
argp_error(state, "%s", strerror(ret_errno));
1877
}
1640
interface = arg;
1878
1641
break;
1879
1642
case 's': /* --seckey */
1880
1643
seckey = arg;
1958
1721
<http://bugs.debian.org/633582> */
1959
1722
1960
1723
/* Re-raise priviliges */
1961
if(raise_privileges() == 0){
1724
errno = 0;
1725
ret = seteuid(0);
1726
if(ret == -1){
1727
perror_plus("seteuid");
1728
} else {
1962
1729
struct stat st;
1963
1730
1964
1731
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2012
1779
}
2013
1780
}
2014
1781
2015
/* Remove empty interface names */
2016
{
2017
char *interface = NULL;
2018
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2019
interface))){
2020
if(if_nametoindex(interface) == 0){
2021
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2022
fprintf_plus(stderr, "Not using nonexisting interface"
2023
" \"%s\"\n", interface);
2024
}
2025
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2026
interface = NULL;
2027
}
2028
}
2029
}
2030
2031
1782
/* Run network hooks */
2032
{
2033
2034
if(mc.interfaces != NULL){
2035
interfaces_hooks = malloc(mc.interfaces_size);
2036
if(interfaces_hooks == NULL){
2037
perror_plus("malloc");
2038
goto end;
2039
}
2040
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2041
interfaces_hooks_size = mc.interfaces_size;
2042
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2043
(int)',');
2044
}
2045
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2046
interfaces_hooks : "", delay)){
2047
goto end;
2048
}
1783
if(not run_network_hooks("start", interface, delay)){
1784
goto end;
2049
1785
}
2050
1786
2051
1787
if(not debug){
2052
1788
avahi_set_log_function(empty_log);
2053
1789
}
2054
1790
1791
if(interface[0] == '\0'){
1792
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1795
alphasort);
1796
if(ret == 0){
1797
/* No up interfaces, look for any good interfaces */
1798
free(direntries);
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1800
alphasort);
1801
}
1802
if(ret >= 1){
1803
/* Pick the first interface returned */
1804
interface = strdup(direntries[0]->d_name);
1805
if(debug){
1806
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1807
}
1808
if(interface == NULL){
1809
perror_plus("malloc");
1810
free(direntries);
1811
exitcode = EXIT_FAILURE;
1812
goto end;
1813
}
1814
free(direntries);
1815
} else {
1816
free(direntries);
1817
fprintf_plus(stderr, "Could not find a network interface\n");
1818
exitcode = EXIT_FAILURE;
1819
goto end;
1820
}
1821
}
1822
2055
1823
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2056
1824
from the signal handler */
2057
1825
/* Initialize the pseudo-RNG for Avahi */
2058
1826
srand((unsigned int) time(NULL));
2059
simple_poll = avahi_simple_poll_new();
2060
if(simple_poll == NULL){
1827
mc.simple_poll = avahi_simple_poll_new();
1828
if(mc.simple_poll == NULL){
2061
1829
fprintf_plus(stderr,
2062
1830
"Avahi: Failed to create simple poll object.\n");
2063
1831
exitcode = EX_UNAVAILABLE;
2127
1895
}
2128
1896
}
2129
1897
2130
/* If no interfaces were specified, make a list */
2131
if(mc.interfaces == NULL){
2132
struct dirent **direntries;
2133
/* Look for any good interfaces */
2134
ret = scandir(sys_class_net, &direntries, good_interface,
2135
alphasort);
2136
if(ret >= 1){
2137
/* Add all found interfaces to interfaces list */
2138
for(int i = 0; i < ret; ++i){
2139
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2140
direntries[i]->d_name);
2141
if(ret_errno != 0){
2142
perror_plus("argz_add");
2143
continue;
2144
}
2145
if(debug){
2146
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2147
direntries[i]->d_name);
2148
}
2149
}
2150
free(direntries);
2151
} else {
2152
free(direntries);
2153
fprintf_plus(stderr, "Could not find a network interface\n");
2154
exitcode = EXIT_FAILURE;
2155
goto end;
2156
}
2157
}
2158
2159
/* If we only got one interface, explicitly use only that one */
2160
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2161
if(debug){
2162
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2163
mc.interfaces);
2164
}
2165
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2166
}
2167
2168
/* Bring up interfaces which are down */
2169
if(not (argz_count(mc.interfaces, mc.interfaces_size) == 1
2170
and strcmp(mc.interfaces, "none") == 0)){
2171
char *interface = NULL;
2172
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2173
interface))){
2174
bool interface_was_up = interface_is_up(interface);
2175
ret = bring_up_interface(interface, delay);
2176
if(not interface_was_up){
2177
if(ret != 0){
2178
errno = ret;
2179
perror_plus("Failed to bring up interface");
2180
} else {
2181
ret_errno = argz_add(&interfaces_to_take_down,
2182
&interfaces_to_take_down_size,
2183
interface);
2184
}
2185
}
2186
}
2187
free(mc.interfaces);
2188
mc.interfaces = NULL;
2189
mc.interfaces_size = 0;
2190
if(debug and (interfaces_to_take_down == NULL)){
2191
fprintf_plus(stderr, "No interfaces were brought up\n");
1898
/* If the interface is down, bring it up */
1899
if(strcmp(interface, "none") != 0){
1900
if_index = (AvahiIfIndex) if_nametoindex(interface);
1901
if(if_index == 0){
1902
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1903
exitcode = EX_UNAVAILABLE;
1904
goto end;
1905
}
1906
1907
if(quit_now){
1908
goto end;
1909
}
1910
1911
/* Re-raise priviliges */
1912
errno = 0;
1913
ret = seteuid(0);
1914
if(ret == -1){
1915
perror_plus("seteuid");
1916
}
1917
1918
#ifdef __linux__
1919
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1920
messages about the network interface to mess up the prompt */
1921
ret = klogctl(8, NULL, 5);
1922
bool restore_loglevel = true;
1923
if(ret == -1){
1924
restore_loglevel = false;
1925
perror_plus("klogctl");
1926
}
1927
#endif /* __linux__ */
1928
1929
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1930
if(sd < 0){
1931
perror_plus("socket");
1932
exitcode = EX_OSERR;
1933
#ifdef __linux__
1934
if(restore_loglevel){
1935
ret = klogctl(7, NULL, 0);
1936
if(ret == -1){
1937
perror_plus("klogctl");
1938
}
1939
}
1940
#endif /* __linux__ */
1941
/* Lower privileges */
1942
errno = 0;
1943
ret = seteuid(uid);
1944
if(ret == -1){
1945
perror_plus("seteuid");
1946
}
1947
goto end;
1948
}
1949
strcpy(network.ifr_name, interface);
1950
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1951
if(ret == -1){
1952
perror_plus("ioctl SIOCGIFFLAGS");
1953
#ifdef __linux__
1954
if(restore_loglevel){
1955
ret = klogctl(7, NULL, 0);
1956
if(ret == -1){
1957
perror_plus("klogctl");
1958
}
1959
}
1960
#endif /* __linux__ */
1961
exitcode = EX_OSERR;
1962
/* Lower privileges */
1963
errno = 0;
1964
ret = seteuid(uid);
1965
if(ret == -1){
1966
perror_plus("seteuid");
1967
}
1968
goto end;
1969
}
1970
if((network.ifr_flags & IFF_UP) == 0){
1971
network.ifr_flags |= IFF_UP;
1972
take_down_interface = true;
1973
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1974
if(ret == -1){
1975
take_down_interface = false;
1976
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1977
exitcode = EX_OSERR;
1978
#ifdef __linux__
1979
if(restore_loglevel){
1980
ret = klogctl(7, NULL, 0);
1981
if(ret == -1){
1982
perror_plus("klogctl");
1983
}
1984
}
1985
#endif /* __linux__ */
1986
/* Lower privileges */
1987
errno = 0;
1988
ret = seteuid(uid);
1989
if(ret == -1){
1990
perror_plus("seteuid");
1991
}
1992
goto end;
1993
}
1994
}
1995
/* Sleep checking until interface is running.
1996
Check every 0.25s, up to total time of delay */
1997
for(int i=0; i < delay * 4; i++){
1998
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1999
if(ret == -1){
2000
perror_plus("ioctl SIOCGIFFLAGS");
2001
} else if(network.ifr_flags & IFF_RUNNING){
2002
break;
2003
}
2004
struct timespec sleeptime = { .tv_nsec = 250000000 };
2005
ret = nanosleep(&sleeptime, NULL);
2006
if(ret == -1 and errno != EINTR){
2007
perror_plus("nanosleep");
2008
}
2009
}
2010
if(not take_down_interface){
2011
/* We won't need the socket anymore */
2012
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2013
if(ret == -1){
2014
perror_plus("close");
2015
}
2016
}
2017
#ifdef __linux__
2018
if(restore_loglevel){
2019
/* Restores kernel loglevel to default */
2020
ret = klogctl(7, NULL, 0);
2021
if(ret == -1){
2022
perror_plus("klogctl");
2023
}
2024
}
2025
#endif /* __linux__ */
2026
/* Lower privileges */
2027
errno = 0;
2028
/* Lower privileges */
2029
ret = seteuid(uid);
2030
if(ret == -1){
2031
perror_plus("seteuid");
2192
2032
}
2193
2033
}
2194
2034
2196
2036
goto end;
2197
2037
}
2198
2038
2199
ret = init_gnutls_global(pubkey, seckey, &mc);
2039
ret = init_gnutls_global(pubkey, seckey);
2200
2040
if(ret == -1){
2201
2041
fprintf_plus(stderr, "init_gnutls_global failed\n");
2202
2042
exitcode = EX_UNAVAILABLE;
2219
2059
goto end;
2220
2060
}
2221
2061
2222
if(not init_gpgme(pubkey, seckey, tempdir, &mc)){
2062
if(not init_gpgme(pubkey, seckey, tempdir)){
2223
2063
fprintf_plus(stderr, "init_gpgme failed\n");
2224
2064
exitcode = EX_UNAVAILABLE;
2225
2065
goto end;
2235
2075
/* Connect directly, do not use Zeroconf */
2236
2076
/* (Mainly meant for debugging) */
2237
2077
char *address = strrchr(connect_to, ':');
2238
2239
2078
if(address == NULL){
2240
2079
fprintf_plus(stderr, "No colon in address\n");
2241
2080
exitcode = EX_USAGE;
2246
2085
goto end;
2247
2086
}
2248
2087
2249
in_port_t port;
2088
uint16_t port;
2250
2089
errno = 0;
2251
2090
tmpmax = strtoimax(address+1, &tmp, 10);
2252
2091
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2253
or tmpmax != (in_port_t)tmpmax){
2092
or tmpmax != (uint16_t)tmpmax){
2254
2093
fprintf_plus(stderr, "Bad port number\n");
2255
2094
exitcode = EX_USAGE;
2256
2095
goto end;
2260
2099
goto end;
2261
2100
}
2262
2101
2263
port = (in_port_t)tmpmax;
2102
port = (uint16_t)tmpmax;
2264
2103
*address = '\0';
2265
2104
/* Colon in address indicates IPv6 */
2266
2105
int af;
2282
2121
}
2283
2122
2284
2123
while(not quit_now){
2285
ret = start_mandos_communication(address, port, if_index, af,
2286
&mc);
2124
ret = start_mandos_communication(address, port, if_index, af);
2287
2125
if(quit_now or ret == 0){
2288
2126
break;
2289
2127
}
2315
2153
config.publish_domain = 0;
2316
2154
2317
2155
/* Allocate a new server */
2318
mc.server = avahi_server_new(avahi_simple_poll_get(simple_poll),
2319
&config, NULL, NULL, &ret_errno);
2156
mc.server = avahi_server_new(avahi_simple_poll_get
2157
(mc.simple_poll), &config, NULL,
2158
NULL, &error);
2320
2159
2321
2160
/* Free the Avahi configuration data */
2322
2161
avahi_server_config_free(&config);
2325
2164
/* Check if creating the Avahi server object succeeded */
2326
2165
if(mc.server == NULL){
2327
2166
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2328
avahi_strerror(ret_errno));
2167
avahi_strerror(error));
2329
2168
exitcode = EX_UNAVAILABLE;
2330
2169
goto end;
2331
2170
}
2337
2176
/* Create the Avahi service browser */
2338
2177
sb = avahi_s_service_browser_new(mc.server, if_index,
2339
2178
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2340
NULL, 0, browse_callback,
2341
(void *)&mc);
2179
NULL, 0, browse_callback, NULL);
2342
2180
if(sb == NULL){
2343
2181
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2344
2182
avahi_strerror(avahi_server_errno(mc.server)));
2356
2194
fprintf_plus(stderr, "Starting Avahi loop search\n");
2357
2195
}
2358
2196
2359
ret = avahi_loop_with_timeout(simple_poll,
2360
(int)(retry_interval * 1000), &mc);
2197
ret = avahi_loop_with_timeout(mc.simple_poll,
2198
(int)(retry_interval * 1000));
2361
2199
if(debug){
2362
2200
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2363
2201
(ret == 0) ? "successfully" : "with error");
2376
2214
if(mc.server != NULL)
2377
2215
avahi_server_free(mc.server);
2378
2216
2379
if(simple_poll != NULL)
2380
avahi_simple_poll_free(simple_poll);
2217
if(mc.simple_poll != NULL)
2218
avahi_simple_poll_free(mc.simple_poll);
2381
2219
2382
2220
if(gnutls_initialized){
2383
2221
gnutls_certificate_free_credentials(mc.cred);
2400
2238
}
2401
2239
}
2402
2240
2241
/* Run network hooks */
2242
run_network_hooks("stop", interface, delay);
2243
2403
2244
/* Re-raise priviliges */
2404
2245
{
2405
raise_privileges();
2406
2407
/* Run network hooks */
2408
run_network_hooks("stop", interfaces_hooks != NULL ?
2409
interfaces_hooks : "", delay);
2410
2411
/* Take down the network interfaces which were brought up */
2412
{
2413
char *interface = NULL;
2414
while((interface=argz_next(interfaces_to_take_down,
2415
interfaces_to_take_down_size,
2416
interface))){
2417
ret_errno = take_down_interface(interface);
2418
if(ret_errno != 0){
2419
errno = ret_errno;
2420
perror_plus("Failed to take down interface");
2246
errno = 0;
2247
ret = seteuid(0);
2248
if(ret == -1){
2249
perror_plus("seteuid");
2250
}
2251
2252
/* Take down the network interface */
2253
if(take_down_interface and geteuid() == 0){
2254
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2255
if(ret == -1){
2256
perror_plus("ioctl SIOCGIFFLAGS");
2257
} else if(network.ifr_flags & IFF_UP){
2258
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2259
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2260
if(ret == -1){
2261
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2421
2262
}
2422
2263
}
2423
if(debug and (interfaces_to_take_down == NULL)){
2424
fprintf_plus(stderr, "No interfaces needed to be taken"
2425
" down\n");
2264
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2265
if(ret == -1){
2266
perror_plus("close");
2426
2267
}
2427
2268
}
2428
2429
lower_privileges_permanently();
2430
}
2431
2432
free(interfaces_to_take_down);
2433
free(interfaces_hooks);
2269
}
2270
/* Lower privileges permanently */
2271
errno = 0;
2272
ret = setuid(uid);
2273
if(ret == -1){
2274
perror_plus("setuid");
2275
}
2434
2276
2435
2277
/* Removes the GPGME temp directory and all files inside */
2436
2278
if(tempdir_created){
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0