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- Committer: Teddy Hogeborn
- Date: 2012-06-16 23:25:46 UTC
- Revision ID: teddy@recompile.se-20120616232546-dcrkmnhd4yhq6mvd
* plugins.d/mandos-client (mandos_context): Moved to inside "main()".
All users changed.
(add_server): Take new "current_server" argument; all callers
changed.
(init_gpgme, pgp_packet_decrypt, init_gnutls_global,
init_gnutls_session, start_mandos_communication,
avahi_loop_with_timeout): Take new "mc" argument"; all callers
changed.
(resolve_callback, browse_callback): Handle void pointer userdata as
"mc", a pointer to
mandos_context. All callers
changed.
(main): New "mc" variable.
All users changed.
(add_server): Take new "current_server" argument; all callers
changed.
(init_gpgme, pgp_packet_decrypt, init_gnutls_global,
init_gnutls_session, start_mandos_communication,
avahi_loop_with_timeout): Take new "mc" argument"; all callers
changed.
(resolve_callback, browse_callback): Handle void pointer userdata as
"mc", a pointer to
mandos_context. All callers
changed.
(main): New "mc" variable.
- files removed:
- debian/upstream
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif /* not _LARGEFILE_SOURCE */
35
#endif
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
38
#endif
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror() */
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
63
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
79
77
#include <iso646.h> /* not, or, and */
80
78
#include <argp.h> /* struct argp_option, error_t, struct
81
79
argp_state, struct argp,
93
91
argz_delete(), argz_append(),
94
92
argz_stringify(), argz_add(),
95
93
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
98
94
99
95
#ifdef __linux__
100
96
#include <sys/klog.h> /* klogctl() */
142
138
static const char sys_class_net[] = "/sys/class/net";
143
139
char *connect_to = NULL;
144
140
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
141
uid_t uid = 65534;
147
142
gid_t gid = 65534;
148
143
166
161
const char *priority;
167
162
gpgme_ctx_t ctx;
168
163
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
171
164
} mandos_context;
172
165
173
166
/* global so signal handler can reach it*/
185
178
perror(print_text);
186
179
}
187
180
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
181
__attribute__((format (gnu_printf, 2, 3)))
189
182
int fprintf_plus(FILE *stream, const char *format, ...){
190
183
va_list ap;
191
184
va_start (ap, format);
192
185
193
186
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
187
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
189
}
197
190
198
191
/*
200
193
* bytes. "buffer_capacity" is how much is currently allocated,
201
194
* "buffer_length" is how much is already used.
202
195
*/
203
__attribute__((nonnull, warn_unused_result))
204
196
size_t incbuffer(char **buffer, size_t buffer_length,
205
197
size_t buffer_capacity){
206
198
if(buffer_length + BUFFER_SIZE > buffer_capacity){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
199
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
200
if(buffer == NULL){
213
201
return 0;
214
202
}
215
*buffer = new_buf;
216
203
buffer_capacity += BUFFER_SIZE;
217
204
}
218
205
return buffer_capacity;
219
206
}
220
207
221
208
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
209
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
210
int af, server **current_server){
225
211
int ret;
236
222
perror_plus("strdup");
237
223
return false;
238
224
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
225
/* Special case of first server */
245
226
if(*current_server == NULL){
246
227
new_server->next = new_server;
247
228
new_server->prev = new_server;
248
229
*current_server = new_server;
230
/* Place the new server last in the list */
249
231
} else {
250
/* Place the new server last in the list */
251
232
new_server->next = *current_server;
252
233
new_server->prev = (*current_server)->prev;
253
234
new_server->prev->next = new_server;
254
235
(*current_server)->prev = new_server;
255
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
256
242
return true;
257
243
}
258
244
259
245
/*
260
246
* Initialize GPGME.
261
247
*/
262
__attribute__((nonnull, warn_unused_result))
263
static bool init_gpgme(const char * const seckey,
264
const char * const pubkey,
265
const char * const tempdir,
266
mandos_context *mc){
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
267
250
gpgme_error_t rc;
268
251
gpgme_engine_info_t engine_info;
269
252
270
253
/*
271
254
* Helper function to insert pub and seckey to the engine keyring.
272
255
*/
273
bool import_key(const char * const filename){
256
bool import_key(const char *filename){
274
257
int ret;
275
258
int fd;
276
259
gpgme_data_t pgp_data;
357
340
* Decrypt OpenPGP data.
358
341
* Returns -1 on error
359
342
*/
360
__attribute__((nonnull, warn_unused_result))
361
343
static ssize_t pgp_packet_decrypt(const char *cryptotext,
362
344
size_t crypto_size,
363
345
char **plaintext,
483
465
return plaintext_length;
484
466
}
485
467
486
__attribute__((warn_unused_result))
487
static const char *safer_gnutls_strerror(int value){
468
static const char * safer_gnutls_strerror(int value){
488
469
const char *ret = gnutls_strerror(value);
489
470
if(ret == NULL)
490
471
ret = "(unknown)";
492
473
}
493
474
494
475
/* GnuTLS log function callback */
495
__attribute__((nonnull))
496
476
static void debuggnutls(__attribute__((unused)) int level,
497
477
const char* string){
498
478
fprintf_plus(stderr, "GnuTLS: %s", string);
499
479
}
500
480
501
__attribute__((nonnull, warn_unused_result))
502
481
static int init_gnutls_global(const char *pubkeyfilename,
503
482
const char *seckeyfilename,
504
483
mandos_context *mc){
578
557
return -1;
579
558
}
580
559
581
__attribute__((nonnull, warn_unused_result))
582
560
static int init_gnutls_session(gnutls_session_t *session,
583
561
mandos_context *mc){
584
562
int ret;
641
619
__attribute__((unused)) const char *txt){}
642
620
643
621
/* Called when a Mandos server is found */
644
__attribute__((nonnull, warn_unused_result))
645
622
static int start_mandos_communication(const char *ip, in_port_t port,
646
623
AvahiIfIndex if_index,
647
624
int af, mandos_context *mc){
648
625
int ret, tcp_sd = -1;
649
626
ssize_t sret;
650
struct sockaddr_storage to;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
651
631
char *buffer = NULL;
652
632
char *decrypted_buffer = NULL;
653
633
size_t buffer_length = 0;
677
657
return -1;
678
658
}
679
659
680
/* If the interface is specified and we have a list of interfaces */
681
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
682
/* Check if the interface is one of the interfaces we are using */
683
bool match = false;
684
{
685
char *interface = NULL;
686
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
687
interface))){
688
if(if_nametoindex(interface) == (unsigned int)if_index){
689
match = true;
690
break;
691
}
692
}
693
}
694
if(not match){
695
/* This interface does not match any in the list, so we don't
696
connect to the server */
697
if(debug){
698
char interface[IF_NAMESIZE];
699
if(if_indextoname((unsigned int)if_index, interface) == NULL){
700
perror_plus("if_indextoname");
701
} else {
702
fprintf_plus(stderr, "Skipping server on non-used interface"
703
" \"%s\"\n",
704
if_indextoname((unsigned int)if_index,
705
interface));
706
}
707
}
708
return -1;
709
}
710
}
711
712
660
ret = init_gnutls_session(&session, mc);
713
661
if(ret != 0){
714
662
return -1;
734
682
735
683
memset(&to, 0, sizeof(to));
736
684
if(af == AF_INET6){
737
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
738
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
739
687
} else { /* IPv4 */
740
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
742
690
}
743
691
if(ret < 0 ){
744
692
int e = errno;
753
701
goto mandos_end;
754
702
}
755
703
if(af == AF_INET6){
756
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
757
if(IN6_IS_ADDR_LINKLOCAL
758
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
704
to.in6.sin6_port = htons(port);
705
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
-Wunreachable-code*/
759
708
if(if_index == AVAHI_IF_UNSPEC){
760
709
fprintf_plus(stderr, "An IPv6 link-local address is"
761
710
" incomplete without a network interface\n");
763
712
goto mandos_end;
764
713
}
765
714
/* Set the network interface number as scope */
766
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
715
to.in6.sin6_scope_id = (uint32_t)if_index;
767
716
}
768
717
} else {
769
((struct sockaddr_in *)&to)->sin_port = htons(port);
718
to.in.sin_port = htons(port); /* Spurious warnings from
719
-Wconversion and
720
-Wunreachable-code */
770
721
}
771
722
772
723
if(quit_now){
789
740
}
790
741
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
791
742
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
792
744
if(af == AF_INET6){
793
ret = getnameinfo((struct sockaddr *)&to,
794
sizeof(struct sockaddr_in6),
795
addrstr, sizeof(addrstr), NULL, 0,
796
NI_NUMERICHOST);
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
797
747
} else {
798
ret = getnameinfo((struct sockaddr *)&to,
799
sizeof(struct sockaddr_in),
800
addrstr, sizeof(addrstr), NULL, 0,
801
NI_NUMERICHOST);
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
802
750
}
803
if(ret == EAI_SYSTEM){
804
perror_plus("getnameinfo");
805
} else if(ret != 0) {
806
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
807
} else if(strcmp(addrstr, ip) != 0){
808
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
751
if(pcret == NULL){
752
perror_plus("inet_ntop");
753
} else {
754
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
756
}
809
757
}
810
758
}
811
759
815
763
}
816
764
817
765
if(af == AF_INET6){
818
ret = connect(tcp_sd, (struct sockaddr *)&to,
819
sizeof(struct sockaddr_in6));
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
820
767
} else {
821
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
822
sizeof(struct sockaddr_in));
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
823
769
}
824
770
if(ret < 0){
825
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
826
772
int e = errno;
827
773
perror_plus("connect");
828
774
errno = e;
1043
989
return retval;
1044
990
}
1045
991
1046
__attribute__((nonnull))
1047
992
static void resolve_callback(AvahiSServiceResolver *r,
1048
993
AvahiIfIndex interface,
1049
994
AvahiProtocol proto,
1057
1002
AVAHI_GCC_UNUSED AvahiStringList *txt,
1058
1003
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1059
1004
flags,
1060
void *mc){
1005
void* mc){
1061
1006
if(r == NULL){
1062
1007
return;
1063
1008
}
1116
1061
const char *domain,
1117
1062
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1118
1063
flags,
1119
void *mc){
1064
void* mc){
1120
1065
if(b == NULL){
1121
1066
return;
1122
1067
}
1182
1127
errno = old_errno;
1183
1128
}
1184
1129
1185
__attribute__((nonnull, warn_unused_result))
1186
1130
bool get_flags(const char *ifname, struct ifreq *ifr){
1187
1131
int ret;
1188
1132
error_t ret_errno;
1207
1151
return true;
1208
1152
}
1209
1153
1210
__attribute__((nonnull, warn_unused_result))
1211
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1212
1155
1213
1156
/* Reject the loopback device */
1255
1198
* corresponds to an acceptable network device.
1256
1199
* (This function is passed to scandir(3) as a filter function.)
1257
1200
*/
1258
__attribute__((nonnull, warn_unused_result))
1259
1201
int good_interface(const struct dirent *if_entry){
1260
1202
if(if_entry->d_name[0] == '.'){
1261
1203
return 0;
1279
1221
/*
1280
1222
* This function determines if a network interface is up.
1281
1223
*/
1282
__attribute__((nonnull, warn_unused_result))
1283
1224
bool interface_is_up(const char *interface){
1284
1225
struct ifreq ifr;
1285
1226
if(not get_flags(interface, &ifr)){
1296
1237
/*
1297
1238
* This function determines if a network interface is running
1298
1239
*/
1299
__attribute__((nonnull, warn_unused_result))
1300
1240
bool interface_is_running(const char *interface){
1301
1241
struct ifreq ifr;
1302
1242
if(not get_flags(interface, &ifr)){
1310
1250
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1311
1251
}
1312
1252
1313
__attribute__((nonnull, pure, warn_unused_result))
1314
1253
int notdotentries(const struct dirent *direntry){
1315
1254
/* Skip "." and ".." */
1316
1255
if(direntry->d_name[0] == '.'
1323
1262
}
1324
1263
1325
1264
/* Is this directory entry a runnable program? */
1326
__attribute__((nonnull, warn_unused_result))
1327
1265
int runnable_hook(const struct dirent *direntry){
1328
1266
int ret;
1329
1267
size_t sret;
1337
1275
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1338
1276
"abcdefghijklmnopqrstuvwxyz"
1339
1277
"0123456789"
1340
"_.-");
1278
"_-");
1341
1279
if((direntry->d_name)[sret] != '\0'){
1342
1280
/* Contains non-allowed characters */
1343
1281
if(debug){
1347
1285
return 0;
1348
1286
}
1349
1287
1350
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1288
char *fullname = NULL;
1289
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1290
if(ret < 0){
1291
perror_plus("asprintf");
1292
return 0;
1293
}
1294
1295
ret = stat(fullname, &st);
1351
1296
if(ret == -1){
1352
1297
if(debug){
1353
1298
perror_plus("Could not stat hook");
1377
1322
return 1;
1378
1323
}
1379
1324
1380
__attribute__((nonnull, warn_unused_result))
1381
1325
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1382
1326
mandos_context *mc){
1383
1327
int ret;
1387
1331
1388
1332
while(true){
1389
1333
if(mc->current_server == NULL){
1390
if(debug){
1334
if (debug){
1391
1335
fprintf_plus(stderr, "Wait until first server is found."
1392
1336
" No timeout!\n");
1393
1337
}
1394
1338
ret = avahi_simple_poll_iterate(s, -1);
1395
1339
} else {
1396
if(debug){
1340
if (debug){
1397
1341
fprintf_plus(stderr, "Check current_server if we should run"
1398
1342
" it, or wait\n");
1399
1343
}
1416
1360
- ((intmax_t)waited_time.tv_sec * 1000))
1417
1361
- ((intmax_t)waited_time.tv_nsec / 1000000));
1418
1362
1419
if(debug){
1363
if (debug){
1420
1364
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1421
1365
block_time);
1422
1366
}
1444
1388
ret = avahi_simple_poll_iterate(s, (int)block_time);
1445
1389
}
1446
1390
if(ret != 0){
1447
if(ret > 0 or errno != EINTR){
1391
if (ret > 0 or errno != EINTR){
1448
1392
return (ret != 1) ? ret : 0;
1449
1393
}
1450
1394
}
1452
1396
}
1453
1397
1454
1398
/* Set effective uid to 0, return errno */
1455
__attribute__((warn_unused_result))
1456
1399
error_t raise_privileges(void){
1457
1400
error_t old_errno = errno;
1458
1401
error_t ret_errno = 0;
1465
1408
}
1466
1409
1467
1410
/* Set effective and real user ID to 0. Return errno. */
1468
__attribute__((warn_unused_result))
1469
1411
error_t raise_privileges_permanently(void){
1470
1412
error_t old_errno = errno;
1471
1413
error_t ret_errno = raise_privileges();
1482
1424
}
1483
1425
1484
1426
/* Set effective user ID to unprivileged saved user ID */
1485
__attribute__((warn_unused_result))
1486
1427
error_t lower_privileges(void){
1487
1428
error_t old_errno = errno;
1488
1429
error_t ret_errno = 0;
1495
1436
}
1496
1437
1497
1438
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1499
1439
error_t lower_privileges_permanently(void){
1500
1440
error_t old_errno = errno;
1501
1441
error_t ret_errno = 0;
1507
1447
return ret_errno;
1508
1448
}
1509
1449
1510
__attribute__((nonnull))
1511
void run_network_hooks(const char *mode, const char *interface,
1450
bool run_network_hooks(const char *mode, const char *interface,
1512
1451
const float delay){
1513
struct dirent **direntries = NULL;
1514
if(hookdir_fd == -1){
1515
hookdir_fd = open(hookdir, O_RDONLY);
1516
if(hookdir_fd == -1){
1517
if(errno == ENOENT){
1518
if(debug){
1519
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1520
" found\n", hookdir);
1521
}
1522
} else {
1523
perror_plus("open");
1524
}
1525
return;
1526
}
1527
}
1528
#ifdef __GLIBC__
1529
#if __GLIBC_PREREQ(2, 15)
1530
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1531
runnable_hook, alphasort);
1532
#else /* not __GLIBC_PREREQ(2, 15) */
1533
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1534
alphasort);
1535
#endif /* not __GLIBC_PREREQ(2, 15) */
1536
#else /* not __GLIBC__ */
1537
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1538
alphasort);
1539
#endif /* not __GLIBC__ */
1452
struct dirent **direntries;
1453
struct dirent *direntry;
1454
int ret;
1455
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
alphasort);
1540
1457
if(numhooks == -1){
1541
perror_plus("scandir");
1542
return;
1543
}
1544
struct dirent *direntry;
1545
int ret;
1546
int devnull = open("/dev/null", O_RDONLY);
1547
for(int i = 0; i < numhooks; i++){
1548
direntry = direntries[i];
1549
if(debug){
1550
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1551
direntry->d_name);
1458
if(errno == ENOENT){
1459
if(debug){
1460
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1461
" found\n", hookdir);
1462
}
1463
} else {
1464
perror_plus("scandir");
1552
1465
}
1553
pid_t hook_pid = fork();
1554
if(hook_pid == 0){
1555
/* Child */
1556
/* Raise privileges */
1557
if(raise_privileges_permanently() != 0){
1558
perror_plus("Failed to raise privileges");
1559
_exit(EX_NOPERM);
1560
}
1561
/* Set group */
1562
errno = 0;
1563
ret = setgid(0);
1564
if(ret == -1){
1565
perror_plus("setgid");
1566
_exit(EX_NOPERM);
1567
}
1568
/* Reset supplementary groups */
1569
errno = 0;
1570
ret = setgroups(0, NULL);
1571
if(ret == -1){
1572
perror_plus("setgroups");
1573
_exit(EX_NOPERM);
1574
}
1575
ret = dup2(devnull, STDIN_FILENO);
1576
if(ret == -1){
1577
perror_plus("dup2(devnull, STDIN_FILENO)");
1578
_exit(EX_OSERR);
1579
}
1580
ret = close(devnull);
1581
if(ret == -1){
1582
perror_plus("close");
1583
_exit(EX_OSERR);
1584
}
1585
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1586
if(ret == -1){
1587
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1588
_exit(EX_OSERR);
1589
}
1590
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1591
if(ret == -1){
1592
perror_plus("setenv");
1593
_exit(EX_OSERR);
1594
}
1595
ret = setenv("DEVICE", interface, 1);
1596
if(ret == -1){
1597
perror_plus("setenv");
1598
_exit(EX_OSERR);
1599
}
1600
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1601
if(ret == -1){
1602
perror_plus("setenv");
1603
_exit(EX_OSERR);
1604
}
1605
ret = setenv("MODE", mode, 1);
1606
if(ret == -1){
1607
perror_plus("setenv");
1608
_exit(EX_OSERR);
1609
}
1610
char *delaystring;
1611
ret = asprintf(&delaystring, "%f", (double)delay);
1612
if(ret == -1){
1466
} else {
1467
int devnull = open("/dev/null", O_RDONLY);
1468
for(int i = 0; i < numhooks; i++){
1469
direntry = direntries[i];
1470
char *fullname = NULL;
1471
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1472
if(ret < 0){
1613
1473
perror_plus("asprintf");
1614
_exit(EX_OSERR);
1615
}
1616
ret = setenv("DELAY", delaystring, 1);
1617
if(ret == -1){
1474
continue;
1475
}
1476
if(debug){
1477
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1478
direntry->d_name);
1479
}
1480
pid_t hook_pid = fork();
1481
if(hook_pid == 0){
1482
/* Child */
1483
/* Raise privileges */
1484
raise_privileges_permanently();
1485
/* Set group */
1486
errno = 0;
1487
ret = setgid(0);
1488
if(ret == -1){
1489
perror_plus("setgid");
1490
}
1491
/* Reset supplementary groups */
1492
errno = 0;
1493
ret = setgroups(0, NULL);
1494
if(ret == -1){
1495
perror_plus("setgroups");
1496
}
1497
dup2(devnull, STDIN_FILENO);
1498
close(devnull);
1499
dup2(STDERR_FILENO, STDOUT_FILENO);
1500
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("DEVICE", interface, 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
ret = setenv("MODE", mode, 1);
1516
if(ret == -1){
1517
perror_plus("setenv");
1518
_exit(EX_OSERR);
1519
}
1520
char *delaystring;
1521
ret = asprintf(&delaystring, "%f", delay);
1522
if(ret == -1){
1523
perror_plus("asprintf");
1524
_exit(EX_OSERR);
1525
}
1526
ret = setenv("DELAY", delaystring, 1);
1527
if(ret == -1){
1528
free(delaystring);
1529
perror_plus("setenv");
1530
_exit(EX_OSERR);
1531
}
1618
1532
free(delaystring);
1619
perror_plus("setenv");
1620
_exit(EX_OSERR);
1621
}
1622
free(delaystring);
1623
if(connect_to != NULL){
1624
ret = setenv("CONNECT", connect_to, 1);
1625
if(ret == -1){
1626
perror_plus("setenv");
1627
_exit(EX_OSERR);
1628
}
1629
}
1630
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1631
if(hook_fd == -1){
1632
perror_plus("openat");
1633
_exit(EXIT_FAILURE);
1634
}
1635
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1636
perror_plus("close");
1637
_exit(EXIT_FAILURE);
1638
}
1639
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1640
environ) == -1){
1641
perror_plus("fexecve");
1642
_exit(EXIT_FAILURE);
1643
}
1644
} else {
1645
int status;
1646
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1647
perror_plus("waitpid");
1648
continue;
1649
}
1650
if(WIFEXITED(status)){
1651
if(WEXITSTATUS(status) != 0){
1652
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1653
" with status %d\n", direntry->d_name,
1654
WEXITSTATUS(status));
1655
continue;
1656
}
1657
} else if(WIFSIGNALED(status)){
1658
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1659
" signal %d\n", direntry->d_name,
1660
WTERMSIG(status));
1661
continue;
1533
if(connect_to != NULL){
1534
ret = setenv("CONNECT", connect_to, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
}
1540
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1541
perror_plus("execl");
1542
_exit(EXIT_FAILURE);
1543
}
1662
1544
} else {
1663
fprintf_plus(stderr, "Warning: network hook \"%s\""
1664
" crashed\n", direntry->d_name);
1665
continue;
1666
}
1667
}
1668
if(debug){
1669
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1670
direntry->d_name);
1671
}
1672
}
1673
free(direntries);
1674
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1675
perror_plus("close");
1676
} else {
1677
hookdir_fd = -1;
1678
}
1679
close(devnull);
1545
int status;
1546
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1547
perror_plus("waitpid");
1548
free(fullname);
1549
continue;
1550
}
1551
if(WIFEXITED(status)){
1552
if(WEXITSTATUS(status) != 0){
1553
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1554
" with status %d\n", direntry->d_name,
1555
WEXITSTATUS(status));
1556
free(fullname);
1557
continue;
1558
}
1559
} else if(WIFSIGNALED(status)){
1560
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1561
" signal %d\n", direntry->d_name,
1562
WTERMSIG(status));
1563
free(fullname);
1564
continue;
1565
} else {
1566
fprintf_plus(stderr, "Warning: network hook \"%s\""
1567
" crashed\n", direntry->d_name);
1568
free(fullname);
1569
continue;
1570
}
1571
}
1572
free(fullname);
1573
if(debug){
1574
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1575
direntry->d_name);
1576
}
1577
}
1578
close(devnull);
1579
}
1580
return true;
1680
1581
}
1681
1582
1682
__attribute__((nonnull, warn_unused_result))
1683
1583
error_t bring_up_interface(const char *const interface,
1684
1584
const float delay){
1585
int sd = -1;
1685
1586
error_t old_errno = errno;
1686
int ret;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1687
1589
struct ifreq network;
1688
1590
unsigned int if_index = if_nametoindex(interface);
1689
1591
if(if_index == 0){
1698
1600
}
1699
1601
1700
1602
if(not interface_is_up(interface)){
1701
error_t ret_errno = 0, ioctl_errno = 0;
1702
if(not get_flags(interface, &network)){
1603
if(not get_flags(interface, &network) and debug){
1703
1604
ret_errno = errno;
1704
1605
fprintf_plus(stderr, "Failed to get flags for interface "
1705
1606
"\"%s\"\n", interface);
1706
errno = old_errno;
1707
1607
return ret_errno;
1708
1608
}
1709
network.ifr_flags |= IFF_UP; /* set flag */
1609
network.ifr_flags |= IFF_UP;
1710
1610
1711
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1712
if(sd == -1){
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1713
1613
ret_errno = errno;
1714
1614
perror_plus("socket");
1715
1615
errno = old_errno;
1716
1616
return ret_errno;
1717
1617
}
1718
1618
1719
1619
if(quit_now){
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1721
if(ret == -1){
1722
perror_plus("close");
1723
}
1620
close(sd);
1724
1621
errno = old_errno;
1725
1622
return EINTR;
1726
1623
}
1730
1627
interface);
1731
1628
}
1732
1629
1733
/* Raise privileges */
1734
ret_errno = raise_privileges();
1735
if(ret_errno != 0){
1736
perror_plus("Failed to raise privileges");
1737
}
1630
/* Raise priviliges */
1631
raise_privileges();
1738
1632
1739
1633
#ifdef __linux__
1740
int ret_linux;
1741
bool restore_loglevel = false;
1742
if(ret_errno == 0){
1743
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1744
messages about the network interface to mess up the prompt */
1745
ret_linux = klogctl(8, NULL, 5);
1746
if(ret_linux == -1){
1747
perror_plus("klogctl");
1748
} else {
1749
restore_loglevel = true;
1750
}
1634
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1635
messages about the network interface to mess up the prompt */
1636
int ret_linux = klogctl(8, NULL, 5);
1637
bool restore_loglevel = true;
1638
if(ret_linux == -1){
1639
restore_loglevel = false;
1640
perror_plus("klogctl");
1751
1641
}
1752
1642
#endif /* __linux__ */
1753
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1754
ioctl_errno = errno;
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1755
1645
#ifdef __linux__
1756
1646
if(restore_loglevel){
1757
1647
ret_linux = klogctl(7, NULL, 0);
1761
1651
}
1762
1652
#endif /* __linux__ */
1763
1653
1764
/* If raise_privileges() succeeded above */
1765
if(ret_errno == 0){
1766
/* Lower privileges */
1767
ret_errno = lower_privileges();
1768
if(ret_errno != 0){
1769
errno = ret_errno;
1770
perror_plus("Failed to lower privileges");
1771
}
1772
}
1654
/* Lower privileges */
1655
lower_privileges();
1773
1656
1774
1657
/* Close the socket */
1775
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1778
1661
}
1779
1662
1780
1663
if(ret_setflags == -1){
1781
errno = ioctl_errno;
1664
errno = ret_errno;
1782
1665
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1783
1666
errno = old_errno;
1784
return ioctl_errno;
1667
return ret_errno;
1785
1668
}
1786
1669
} else if(debug){
1787
1670
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1805
1688
return 0;
1806
1689
}
1807
1690
1808
__attribute__((nonnull, warn_unused_result))
1809
1691
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1810
1693
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1811
1696
struct ifreq network;
1812
1697
unsigned int if_index = if_nametoindex(interface);
1813
1698
if(if_index == 0){
1816
1701
return ENXIO;
1817
1702
}
1818
1703
if(interface_is_up(interface)){
1819
error_t ret_errno = 0, ioctl_errno = 0;
1820
1704
if(not get_flags(interface, &network) and debug){
1821
1705
ret_errno = errno;
1822
1706
fprintf_plus(stderr, "Failed to get flags for interface "
1823
1707
"\"%s\"\n", interface);
1824
errno = old_errno;
1825
1708
return ret_errno;
1826
1709
}
1827
1710
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1828
1711
1829
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1830
if(sd == -1){
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1831
1714
ret_errno = errno;
1832
1715
perror_plus("socket");
1833
1716
errno = old_errno;
1839
1722
interface);
1840
1723
}
1841
1724
1842
/* Raise privileges */
1843
ret_errno = raise_privileges();
1844
if(ret_errno != 0){
1845
perror_plus("Failed to raise privileges");
1846
}
1847
1848
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1849
ioctl_errno = errno;
1850
1851
/* If raise_privileges() succeeded above */
1852
if(ret_errno == 0){
1853
/* Lower privileges */
1854
ret_errno = lower_privileges();
1855
if(ret_errno != 0){
1856
errno = ret_errno;
1857
perror_plus("Failed to lower privileges");
1858
}
1859
}
1725
/* Raise priviliges */
1726
raise_privileges();
1727
1728
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1729
ret_errno = errno;
1730
1731
/* Lower privileges */
1732
lower_privileges();
1860
1733
1861
1734
/* Close the socket */
1862
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1863
1736
if(ret == -1){
1864
1737
perror_plus("close");
1865
1738
}
1866
1739
1867
1740
if(ret_setflags == -1){
1868
errno = ioctl_errno;
1741
errno = ret_errno;
1869
1742
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1870
1743
errno = old_errno;
1871
return ioctl_errno;
1744
return ret_errno;
1872
1745
}
1873
1746
} else if(debug){
1874
1747
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1882
1755
int main(int argc, char *argv[]){
1883
1756
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1884
1757
.priority = "SECURE256:!CTYPE-X.509:"
1885
"+CTYPE-OPENPGP", .current_server = NULL,
1886
.interfaces = NULL, .interfaces_size = 0 };
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1887
1759
AvahiSServiceBrowser *sb = NULL;
1888
1760
error_t ret_errno;
1889
1761
int ret;
1890
1762
intmax_t tmpmax;
1891
1763
char *tmp;
1892
1764
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1893
1767
char *interfaces_to_take_down = NULL;
1894
1768
size_t interfaces_to_take_down_size = 0;
1895
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1896
char old_tempdir[] = "/tmp/mandosXXXXXX";
1897
char *tempdir = NULL;
1769
char tempdir[] = "/tmp/mandosXXXXXX";
1770
bool tempdir_created = false;
1898
1771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1899
1772
const char *seckey = PATHDIR "/" SECKEY;
1900
1773
const char *pubkey = PATHDIR "/" PUBKEY;
1901
1774
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1902
1776
1903
1777
bool gnutls_initialized = false;
1904
1778
bool gpgme_initialized = false;
1995
1869
connect_to = arg;
1996
1870
break;
1997
1871
case 'i': /* --interface */
1998
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1999
arg, (int)',');
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
2000
1874
if(ret_errno != 0){
2001
1875
argp_error(state, "%s", strerror(ret_errno));
2002
1876
}
2082
1956
/* Work around Debian bug #633582:
2083
1957
<http://bugs.debian.org/633582> */
2084
1958
2085
/* Re-raise privileges */
2086
ret_errno = raise_privileges();
2087
if(ret_errno != 0){
2088
errno = ret_errno;
2089
perror_plus("Failed to raise privileges");
2090
} else {
1959
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
2091
1961
struct stat st;
2092
1962
2093
1963
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2133
2003
}
2134
2004
2135
2005
/* Lower privileges */
2136
ret_errno = lower_privileges();
2137
if(ret_errno != 0){
2138
errno = ret_errno;
2139
perror_plus("Failed to lower privileges");
2006
errno = 0;
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2140
2010
}
2141
2011
}
2142
2012
}
2143
2013
2144
/* Remove invalid interface names (except "none") */
2014
/* Remove empty interface names */
2145
2015
{
2146
2016
char *interface = NULL;
2147
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2017
while((interface = argz_next(interfaces, interfaces_size,
2148
2018
interface))){
2149
if(strcmp(interface, "none") != 0
2150
and if_nametoindex(interface) == 0){
2151
if(interface[0] != '\0'){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2152
2021
fprintf_plus(stderr, "Not using nonexisting interface"
2153
2022
" \"%s\"\n", interface);
2154
2023
}
2155
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2024
argz_delete(&interfaces, &interfaces_size, interface);
2156
2025
interface = NULL;
2157
2026
}
2158
2027
}
2160
2029
2161
2030
/* Run network hooks */
2162
2031
{
2163
if(mc.interfaces != NULL){
2164
interfaces_hooks = malloc(mc.interfaces_size);
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2165
2035
if(interfaces_hooks == NULL){
2166
2036
perror_plus("malloc");
2167
2037
goto end;
2168
2038
}
2169
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2170
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2171
}
2172
run_network_hooks("start", interfaces_hooks != NULL ?
2173
interfaces_hooks : "", delay);
2039
memcpy(interfaces_hooks, interfaces, interfaces_size);
2040
interfaces_hooks_size = interfaces_size;
2041
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2042
(int)',');
2043
}
2044
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2045
interfaces_hooks : "", delay)){
2046
goto end;
2047
}
2174
2048
}
2175
2049
2176
2050
if(not debug){
2253
2127
}
2254
2128
2255
2129
/* If no interfaces were specified, make a list */
2256
if(mc.interfaces == NULL){
2257
struct dirent **direntries = NULL;
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2258
2132
/* Look for any good interfaces */
2259
2133
ret = scandir(sys_class_net, &direntries, good_interface,
2260
2134
alphasort);
2261
2135
if(ret >= 1){
2262
2136
/* Add all found interfaces to interfaces list */
2263
2137
for(int i = 0; i < ret; ++i){
2264
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2265
2139
direntries[i]->d_name);
2266
2140
if(ret_errno != 0){
2267
errno = ret_errno;
2268
2141
perror_plus("argz_add");
2269
2142
continue;
2270
2143
}
2275
2148
}
2276
2149
free(direntries);
2277
2150
} else {
2278
if(ret == 0){
2279
free(direntries);
2280
}
2151
free(direntries);
2281
2152
fprintf_plus(stderr, "Could not find a network interface\n");
2282
2153
exitcode = EXIT_FAILURE;
2283
2154
goto end;
2284
2155
}
2285
2156
}
2286
2157
2287
/* Bring up interfaces which are down, and remove any "none"s */
2288
{
2158
/* If we only got one interface, explicitly use only that one */
2159
if(argz_count(interfaces, interfaces_size) == 1){
2160
if(debug){
2161
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2162
interfaces);
2163
}
2164
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2165
}
2166
2167
/* Bring up interfaces which are down */
2168
if(not (argz_count(interfaces, interfaces_size) == 1
2169
and strcmp(interfaces, "none") == 0)){
2289
2170
char *interface = NULL;
2290
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2171
while((interface = argz_next(interfaces, interfaces_size,
2291
2172
interface))){
2292
/* If interface name is "none", stop bringing up interfaces.
2293
Also remove all instances of "none" from the list */
2294
if(strcmp(interface, "none") == 0){
2295
argz_delete(&mc.interfaces, &mc.interfaces_size,
2296
interface);
2297
interface = NULL;
2298
while((interface = argz_next(mc.interfaces,
2299
mc.interfaces_size, interface))){
2300
if(strcmp(interface, "none") == 0){
2301
argz_delete(&mc.interfaces, &mc.interfaces_size,
2302
interface);
2303
interface = NULL;
2304
}
2305
}
2306
break;
2307
}
2308
2173
bool interface_was_up = interface_is_up(interface);
2309
errno = bring_up_interface(interface, delay);
2174
ret = bring_up_interface(interface, delay);
2310
2175
if(not interface_was_up){
2311
if(errno != 0){
2176
if(ret != 0){
2177
errno = ret;
2312
2178
perror_plus("Failed to bring up interface");
2313
2179
} else {
2314
errno = argz_add(&interfaces_to_take_down,
2315
&interfaces_to_take_down_size,
2316
interface);
2317
if(errno != 0){
2318
perror_plus("argz_add");
2319
}
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
2320
2183
}
2321
2184
}
2322
2185
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2323
2189
if(debug and (interfaces_to_take_down == NULL)){
2324
2190
fprintf_plus(stderr, "No interfaces were brought up\n");
2325
2191
}
2326
2192
}
2327
2193
2328
/* If we only got one interface, explicitly use only that one */
2329
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2330
if(debug){
2331
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2332
mc.interfaces);
2333
}
2334
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2335
}
2336
2337
2194
if(quit_now){
2338
2195
goto end;
2339
2196
}
2351
2208
goto end;
2352
2209
}
2353
2210
2354
/* Try /run/tmp before /tmp */
2355
tempdir = mkdtemp(run_tempdir);
2356
if(tempdir == NULL and errno == ENOENT){
2357
if(debug){
2358
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2359
run_tempdir, old_tempdir);
2360
}
2361
tempdir = mkdtemp(old_tempdir);
2362
}
2363
if(tempdir == NULL){
2211
if(mkdtemp(tempdir) == NULL){
2364
2212
perror_plus("mkdtemp");
2365
2213
goto end;
2366
2214
}
2215
tempdir_created = true;
2367
2216
2368
2217
if(quit_now){
2369
2218
goto end;
2405
2254
exitcode = EX_USAGE;
2406
2255
goto end;
2407
2256
}
2408
2257
2409
2258
if(quit_now){
2410
2259
goto end;
2411
2260
}
2441
2290
fprintf_plus(stderr, "Retrying in %d seconds\n",
2442
2291
(int)retry_interval);
2443
2292
}
2444
sleep((unsigned int)retry_interval);
2293
sleep((int)retry_interval);
2445
2294
}
2446
2295
2447
if(not quit_now){
2296
if (not quit_now){
2448
2297
exitcode = EXIT_SUCCESS;
2449
2298
}
2450
2299
2505
2354
if(debug){
2506
2355
fprintf_plus(stderr, "Starting Avahi loop search\n");
2507
2356
}
2508
2357
2509
2358
ret = avahi_loop_with_timeout(simple_poll,
2510
2359
(int)(retry_interval * 1000), &mc);
2511
2360
if(debug){
2520
2369
}
2521
2370
2522
2371
/* Cleanup things */
2523
free(mc.interfaces);
2524
2525
2372
if(sb != NULL)
2526
2373
avahi_s_service_browser_free(sb);
2527
2374
2552
2399
}
2553
2400
}
2554
2401
2555
/* Re-raise privileges */
2402
/* Re-raise priviliges */
2556
2403
{
2557
ret_errno = raise_privileges();
2558
if(ret_errno != 0){
2559
perror_plus("Failed to raise privileges");
2560
} else {
2561
2562
/* Run network hooks */
2563
run_network_hooks("stop", interfaces_hooks != NULL ?
2564
interfaces_hooks : "", delay);
2565
2566
/* Take down the network interfaces which were brought up */
2567
{
2568
char *interface = NULL;
2569
while((interface=argz_next(interfaces_to_take_down,
2570
interfaces_to_take_down_size,
2571
interface))){
2572
ret_errno = take_down_interface(interface);
2573
if(ret_errno != 0){
2574
errno = ret_errno;
2575
perror_plus("Failed to take down interface");
2576
}
2577
}
2578
if(debug and (interfaces_to_take_down == NULL)){
2579
fprintf_plus(stderr, "No interfaces needed to be taken"
2580
" down\n");
2581
}
2582
}
2583
}
2584
2585
ret_errno = lower_privileges_permanently();
2586
if(ret_errno != 0){
2587
perror_plus("Failed to lower privileges permanently");
2588
}
2404
raise_privileges();
2405
2406
/* Run network hooks */
2407
run_network_hooks("stop", interfaces_hooks != NULL ?
2408
interfaces_hooks : "", delay);
2409
2410
/* Take down the network interfaces which were brought up */
2411
{
2412
char *interface = NULL;
2413
while((interface=argz_next(interfaces_to_take_down,
2414
interfaces_to_take_down_size,
2415
interface))){
2416
ret_errno = take_down_interface(interface);
2417
if(ret_errno != 0){
2418
errno = ret_errno;
2419
perror_plus("Failed to take down interface");
2420
}
2421
}
2422
if(debug and (interfaces_to_take_down == NULL)){
2423
fprintf_plus(stderr, "No interfaces needed to be taken"
2424
" down\n");
2425
}
2426
}
2427
2428
lower_privileges_permanently();
2589
2429
}
2590
2430
2591
2431
free(interfaces_to_take_down);
2592
2432
free(interfaces_hooks);
2593
2433
2594
2434
/* Removes the GPGME temp directory and all files inside */
2595
if(tempdir != NULL){
2435
if(tempdir_created){
2596
2436
struct dirent **direntries = NULL;
2597
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2598
O_NOFOLLOW));
2599
if(tempdir_fd == -1){
2600
perror_plus("open");
2601
} else {
2602
#ifdef __GLIBC__
2603
#if __GLIBC_PREREQ(2, 15)
2604
int numentries = scandirat(tempdir_fd, ".", &direntries,
2605
notdotentries, alphasort);
2606
#else /* not __GLIBC_PREREQ(2, 15) */
2607
int numentries = scandir(tempdir, &direntries, notdotentries,
2608
alphasort);
2609
#endif /* not __GLIBC_PREREQ(2, 15) */
2610
#else /* not __GLIBC__ */
2611
int numentries = scandir(tempdir, &direntries, notdotentries,
2612
alphasort);
2613
#endif /* not __GLIBC__ */
2614
if(numentries >= 0){
2615
for(int i = 0; i < numentries; i++){
2616
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2617
if(ret == -1){
2618
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2619
" \"%s\", 0): %s\n", tempdir,
2620
direntries[i]->d_name, strerror(errno));
2621
}
2622
}
2623
2624
/* need to clean even if 0 because man page doesn't specify */
2625
free(direntries);
2626
if(numentries == -1){
2627
perror_plus("scandir");
2628
}
2629
ret = rmdir(tempdir);
2630
if(ret == -1 and errno != ENOENT){
2631
perror_plus("rmdir");
2632
}
2437
struct dirent *direntry = NULL;
2438
int numentries = scandir(tempdir, &direntries, notdotentries,
2439
alphasort);
2440
if (numentries > 0){
2441
for(int i = 0; i < numentries; i++){
2442
direntry = direntries[i];
2443
char *fullname = NULL;
2444
ret = asprintf(&fullname, "%s/%s", tempdir,
2445
direntry->d_name);
2446
if(ret < 0){
2447
perror_plus("asprintf");
2448
continue;
2449
}
2450
ret = remove(fullname);
2451
if(ret == -1){
2452
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2453
strerror(errno));
2454
}
2455
free(fullname);
2633
2456
}
2634
TEMP_FAILURE_RETRY(close(tempdir_fd));
2457
}
2458
2459
/* need to clean even if 0 because man page doesn't specify */
2460
free(direntries);
2461
if (numentries == -1){
2462
perror_plus("scandir");
2463
}
2464
ret = rmdir(tempdir);
2465
if(ret == -1 and errno != ENOENT){
2466
perror_plus("rmdir");
2635
2467
}
2636
2468
}
2637
2469
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0