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237.7.231
(compared to revision 237.25.6)
: plugins.d/mandos-client.c
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- Committer: Teddy Hogeborn
- Date: 2014-05-12 21:02:38 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 313.
- Revision ID: teddy@recompile.se-20140512210238-t6o8b1ieeojrs0xl
Do not run self-tests when building arch-indep Debian package.
* debian/rules (override_dh_auto_test-arch): New; does nothing.
* debian/rules (override_dh_auto_test-arch): New; does nothing.
- files removed:
- plugin-helpers
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2015 Teddy Hogeborn
13
* Copyright © 2008-2015 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 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(),
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect(),
59
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
#include <fcntl.h> /* open() */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
62
*/
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
76
setgid(), pause(), _exit() */
78
77
#include <arpa/inet.h> /* inet_pton(), htons() */
79
78
#include <iso646.h> /* not, or, and */
80
79
#include <argp.h> /* struct argp_option, error_t, struct
142
141
static const char sys_class_net[] = "/sys/class/net";
143
142
char *connect_to = NULL;
144
143
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
144
uid_t uid = 65534;
147
145
gid_t gid = 65534;
148
146
234
232
.af = af };
235
233
if(new_server->ip == NULL){
236
234
perror_plus("strdup");
237
free(new_server);
238
235
return false;
239
236
}
240
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
238
if(ret == -1){
242
239
perror_plus("clock_gettime");
243
#ifdef __GNUC__
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
246
#endif
247
free((char *)(new_server->ip));
248
#ifdef __GNUC__
249
#pragma GCC diagnostic pop
250
#endif
251
free(new_server);
252
240
return false;
253
241
}
254
242
/* Special case of first server */
650
638
static void empty_log(__attribute__((unused)) AvahiLogLevel level,
651
639
__attribute__((unused)) const char *txt){}
652
640
653
/* Set effective uid to 0, return errno */
654
__attribute__((warn_unused_result))
655
error_t raise_privileges(void){
656
error_t old_errno = errno;
657
error_t ret_errno = 0;
658
if(seteuid(0) == -1){
659
ret_errno = errno;
660
}
661
errno = old_errno;
662
return ret_errno;
663
}
664
665
/* Set effective and real user ID to 0. Return errno. */
666
__attribute__((warn_unused_result))
667
error_t raise_privileges_permanently(void){
668
error_t old_errno = errno;
669
error_t ret_errno = raise_privileges();
670
if(ret_errno != 0){
671
errno = old_errno;
672
return ret_errno;
673
}
674
if(setuid(0) == -1){
675
ret_errno = errno;
676
}
677
errno = old_errno;
678
return ret_errno;
679
}
680
681
/* Set effective user ID to unprivileged saved user ID */
682
__attribute__((warn_unused_result))
683
error_t lower_privileges(void){
684
error_t old_errno = errno;
685
error_t ret_errno = 0;
686
if(seteuid(uid) == -1){
687
ret_errno = errno;
688
}
689
errno = old_errno;
690
return ret_errno;
691
}
692
693
/* Lower privileges permanently */
694
__attribute__((warn_unused_result))
695
error_t lower_privileges_permanently(void){
696
error_t old_errno = errno;
697
error_t ret_errno = 0;
698
if(setuid(uid) == -1){
699
ret_errno = errno;
700
}
701
errno = old_errno;
702
return ret_errno;
703
}
704
705
/* Helper function to add_local_route() and delete_local_route() */
706
__attribute__((nonnull, warn_unused_result))
707
static bool add_delete_local_route(const bool add,
708
const char *address,
709
AvahiIfIndex if_index){
710
int ret;
711
char helper[] = "mandos-client-iprouteadddel";
712
char add_arg[] = "add";
713
char delete_arg[] = "delete";
714
char debug_flag[] = "--debug";
715
char *pluginhelperdir = getenv("MANDOSPLUGINHELPERDIR");
716
if(pluginhelperdir == NULL){
717
if(debug){
718
fprintf_plus(stderr, "MANDOSPLUGINHELPERDIR environment"
719
" variable not set; cannot run helper\n");
720
}
721
return false;
722
}
723
724
char interface[IF_NAMESIZE];
725
if(if_indextoname((unsigned int)if_index, interface) == NULL){
726
perror_plus("if_indextoname");
727
return false;
728
}
729
730
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
731
if(devnull == -1){
732
perror_plus("open(\"/dev/null\", O_RDONLY)");
733
return false;
734
}
735
pid_t pid = fork();
736
if(pid == 0){
737
/* Child */
738
/* Raise privileges */
739
errno = raise_privileges_permanently();
740
if(errno != 0){
741
perror_plus("Failed to raise privileges");
742
/* _exit(EX_NOPERM); */
743
} else {
744
/* Set group */
745
errno = 0;
746
ret = setgid(0);
747
if(ret == -1){
748
perror_plus("setgid");
749
_exit(EX_NOPERM);
750
}
751
/* Reset supplementary groups */
752
errno = 0;
753
ret = setgroups(0, NULL);
754
if(ret == -1){
755
perror_plus("setgroups");
756
_exit(EX_NOPERM);
757
}
758
}
759
ret = dup2(devnull, STDIN_FILENO);
760
if(ret == -1){
761
perror_plus("dup2(devnull, STDIN_FILENO)");
762
_exit(EX_OSERR);
763
}
764
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
765
if(ret == -1){
766
perror_plus("close");
767
_exit(EX_OSERR);
768
}
769
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
770
if(ret == -1){
771
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
772
_exit(EX_OSERR);
773
}
774
int helperdir_fd = (int)TEMP_FAILURE_RETRY(open(pluginhelperdir,
775
O_RDONLY
776
| O_DIRECTORY
777
| O_PATH
778
| O_CLOEXEC));
779
if(helperdir_fd == -1){
780
perror_plus("open");
781
_exit(EX_UNAVAILABLE);
782
}
783
int helper_fd = (int)TEMP_FAILURE_RETRY(openat(helperdir_fd,
784
helper, O_RDONLY));
785
if(helper_fd == -1){
786
perror_plus("openat");
787
_exit(EX_UNAVAILABLE);
788
}
789
TEMP_FAILURE_RETRY(close(helperdir_fd));
790
#ifdef __GNUC__
791
#pragma GCC diagnostic push
792
#pragma GCC diagnostic ignored "-Wcast-qual"
793
#endif
794
if(fexecve(helper_fd, (char *const [])
795
{ helper, add ? add_arg : delete_arg, (char *)address,
796
interface, debug ? debug_flag : NULL, NULL },
797
environ) == -1){
798
#ifdef __GNUC__
799
#pragma GCC diagnostic pop
800
#endif
801
perror_plus("fexecve");
802
_exit(EXIT_FAILURE);
803
}
804
}
805
if(pid == -1){
806
perror_plus("fork");
807
return false;
808
}
809
int status;
810
pid_t pret = -1;
811
errno = 0;
812
do {
813
pret = waitpid(pid, &status, 0);
814
if(pret == -1 and errno == EINTR and quit_now){
815
int errno_raising = 0;
816
if((errno = raise_privileges()) != 0){
817
errno_raising = errno;
818
perror_plus("Failed to raise privileges in order to"
819
" kill helper program");
820
}
821
if(kill(pid, SIGTERM) == -1){
822
perror_plus("kill");
823
}
824
if((errno_raising == 0) and (errno = lower_privileges()) != 0){
825
perror_plus("Failed to lower privileges after killing"
826
" helper program");
827
}
828
return false;
829
}
830
} while(pret == -1 and errno == EINTR);
831
if(pret == -1){
832
perror_plus("waitpid");
833
return false;
834
}
835
if(WIFEXITED(status)){
836
if(WEXITSTATUS(status) != 0){
837
fprintf_plus(stderr, "Error: iprouteadddel exited"
838
" with status %d\n", WEXITSTATUS(status));
839
return false;
840
}
841
return true;
842
}
843
if(WIFSIGNALED(status)){
844
fprintf_plus(stderr, "Error: iprouteadddel died by"
845
" signal %d\n", WTERMSIG(status));
846
return false;
847
}
848
fprintf_plus(stderr, "Error: iprouteadddel crashed\n");
849
return false;
850
}
851
852
__attribute__((nonnull, warn_unused_result))
853
static bool add_local_route(const char *address,
854
AvahiIfIndex if_index){
855
if(debug){
856
fprintf_plus(stderr, "Adding route to %s\n", address);
857
}
858
return add_delete_local_route(true, address, if_index);
859
}
860
861
__attribute__((nonnull, warn_unused_result))
862
static bool delete_local_route(const char *address,
863
AvahiIfIndex if_index){
864
if(debug){
865
fprintf_plus(stderr, "Removing route to %s\n", address);
866
}
867
return add_delete_local_route(false, address, if_index);
868
}
869
870
641
/* Called when a Mandos server is found */
871
642
__attribute__((nonnull, warn_unused_result))
872
643
static int start_mandos_communication(const char *ip, in_port_t port,
883
654
int retval = -1;
884
655
gnutls_session_t session;
885
656
int pf; /* Protocol family */
886
bool route_added = false;
887
657
888
658
errno = 0;
889
659
947
717
PRIuMAX "\n", ip, (uintmax_t)port);
948
718
}
949
719
950
tcp_sd = socket(pf, SOCK_STREAM | SOCK_CLOEXEC, 0);
720
tcp_sd = socket(pf, SOCK_STREAM, 0);
951
721
if(tcp_sd < 0){
952
722
int e = errno;
953
723
perror_plus("socket");
1042
812
goto mandos_end;
1043
813
}
1044
814
1045
while(true){
1046
if(af == AF_INET6){
1047
ret = connect(tcp_sd, (struct sockaddr *)&to,
1048
sizeof(struct sockaddr_in6));
1049
} else {
1050
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
1051
sizeof(struct sockaddr_in));
1052
}
1053
if(ret < 0){
1054
if(errno == ENETUNREACH
1055
and if_index != AVAHI_IF_UNSPEC
1056
and connect_to == NULL
1057
and not route_added and
1058
((af == AF_INET6 and not
1059
IN6_IS_ADDR_LINKLOCAL(&(((struct sockaddr_in6 *)
1060
&to)->sin6_addr)))
1061
or (af == AF_INET and
1062
/* Not a a IPv4LL address */
1063
(ntohl(((struct sockaddr_in *)&to)->sin_addr.s_addr)
1064
& 0xFFFF0000L) != 0xA9FE0000L))){
1065
/* Work around Avahi bug - Avahi does not announce link-local
1066
addresses if it has a global address, so local hosts with
1067
*only* a link-local address (e.g. Mandos clients) cannot
1068
connect to a Mandos server announced by Avahi on a server
1069
host with a global address. Work around this by retrying
1070
with an explicit route added with the server's address.
1071
1072
Avahi bug reference:
1073
http://lists.freedesktop.org/archives/avahi/2010-February/001833.html
1074
https://bugs.debian.org/587961
1075
*/
1076
if(debug){
1077
fprintf_plus(stderr, "Mandos server unreachable, trying"
1078
" direct route\n");
1079
}
1080
int e = errno;
1081
route_added = add_local_route(ip, if_index);
1082
if(route_added){
1083
continue;
1084
}
1085
errno = e;
1086
}
1087
if(errno != ECONNREFUSED or debug){
1088
int e = errno;
1089
perror_plus("connect");
1090
errno = e;
1091
}
1092
goto mandos_end;
1093
}
1094
1095
if(quit_now){
1096
errno = EINTR;
1097
goto mandos_end;
1098
}
1099
break;
815
if(af == AF_INET6){
816
ret = connect(tcp_sd, (struct sockaddr *)&to,
817
sizeof(struct sockaddr_in6));
818
} else {
819
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
820
sizeof(struct sockaddr_in));
821
}
822
if(ret < 0){
823
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
824
int e = errno;
825
perror_plus("connect");
826
errno = e;
827
}
828
goto mandos_end;
829
}
830
831
if(quit_now){
832
errno = EINTR;
833
goto mandos_end;
1100
834
}
1101
835
1102
836
const char *out = mandos_protocol_version;
1285
1019
1286
1020
mandos_end:
1287
1021
{
1288
if(route_added){
1289
if(not delete_local_route(ip, if_index)){
1290
fprintf_plus(stderr, "Failed to delete local route to %s on"
1291
" interface %d", ip, if_index);
1292
}
1293
}
1294
1022
int e = errno;
1295
1023
free(decrypted_buffer);
1296
1024
free(buffer);
1336
1064
timed out */
1337
1065
1338
1066
if(quit_now){
1339
avahi_s_service_resolver_free(r);
1340
1067
return;
1341
1068
}
1342
1069
1608
1335
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1609
1336
"abcdefghijklmnopqrstuvwxyz"
1610
1337
"0123456789"
1611
"_.-");
1338
"_-");
1612
1339
if((direntry->d_name)[sret] != '\0'){
1613
1340
/* Contains non-allowed characters */
1614
1341
if(debug){
1618
1345
return 0;
1619
1346
}
1620
1347
1621
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1348
char *fullname = NULL;
1349
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1350
if(ret < 0){
1351
perror_plus("asprintf");
1352
return 0;
1353
}
1354
1355
ret = stat(fullname, &st);
1622
1356
if(ret == -1){
1623
1357
if(debug){
1624
1358
perror_plus("Could not stat hook");
1722
1456
}
1723
1457
}
1724
1458
1459
/* Set effective uid to 0, return errno */
1460
__attribute__((warn_unused_result))
1461
error_t raise_privileges(void){
1462
error_t old_errno = errno;
1463
error_t ret_errno = 0;
1464
if(seteuid(0) == -1){
1465
ret_errno = errno;
1466
perror_plus("seteuid");
1467
}
1468
errno = old_errno;
1469
return ret_errno;
1470
}
1471
1472
/* Set effective and real user ID to 0. Return errno. */
1473
__attribute__((warn_unused_result))
1474
error_t raise_privileges_permanently(void){
1475
error_t old_errno = errno;
1476
error_t ret_errno = raise_privileges();
1477
if(ret_errno != 0){
1478
errno = old_errno;
1479
return ret_errno;
1480
}
1481
if(setuid(0) == -1){
1482
ret_errno = errno;
1483
perror_plus("seteuid");
1484
}
1485
errno = old_errno;
1486
return ret_errno;
1487
}
1488
1489
/* Set effective user ID to unprivileged saved user ID */
1490
__attribute__((warn_unused_result))
1491
error_t lower_privileges(void){
1492
error_t old_errno = errno;
1493
error_t ret_errno = 0;
1494
if(seteuid(uid) == -1){
1495
ret_errno = errno;
1496
perror_plus("seteuid");
1497
}
1498
errno = old_errno;
1499
return ret_errno;
1500
}
1501
1502
/* Lower privileges permanently */
1503
__attribute__((warn_unused_result))
1504
error_t lower_privileges_permanently(void){
1505
error_t old_errno = errno;
1506
error_t ret_errno = 0;
1507
if(setuid(uid) == -1){
1508
ret_errno = errno;
1509
perror_plus("setuid");
1510
}
1511
errno = old_errno;
1512
return ret_errno;
1513
}
1514
1725
1515
__attribute__((nonnull))
1726
1516
void run_network_hooks(const char *mode, const char *interface,
1727
1517
const float delay){
1728
struct dirent **direntries = NULL;
1729
if(hookdir_fd == -1){
1730
hookdir_fd = open(hookdir, O_RDONLY | O_DIRECTORY | O_PATH
1731
| O_CLOEXEC);
1732
if(hookdir_fd == -1){
1733
if(errno == ENOENT){
1734
if(debug){
1735
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1736
" found\n", hookdir);
1737
}
1738
} else {
1739
perror_plus("open");
1740
}
1741
return;
1742
}
1743
}
1744
#ifdef __GLIBC__
1745
#if __GLIBC_PREREQ(2, 15)
1746
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1747
runnable_hook, alphasort);
1748
#else /* not __GLIBC_PREREQ(2, 15) */
1749
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1750
alphasort);
1751
#endif /* not __GLIBC_PREREQ(2, 15) */
1752
#else /* not __GLIBC__ */
1753
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1754
alphasort);
1755
#endif /* not __GLIBC__ */
1518
struct dirent **direntries;
1519
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1520
alphasort);
1756
1521
if(numhooks == -1){
1757
perror_plus("scandir");
1758
return;
1759
}
1760
struct dirent *direntry;
1761
int ret;
1762
int devnull = (int)TEMP_FAILURE_RETRY(open("/dev/null", O_RDONLY));
1763
if(devnull == -1){
1764
perror_plus("open(\"/dev/null\", O_RDONLY)");
1765
return;
1766
}
1767
for(int i = 0; i < numhooks; i++){
1768
direntry = direntries[i];
1769
if(debug){
1770
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1771
direntry->d_name);
1522
if(errno == ENOENT){
1523
if(debug){
1524
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1525
" found\n", hookdir);
1526
}
1527
} else {
1528
perror_plus("scandir");
1772
1529
}
1773
pid_t hook_pid = fork();
1774
if(hook_pid == 0){
1775
/* Child */
1776
/* Raise privileges */
1777
errno = raise_privileges_permanently();
1778
if(errno != 0){
1779
perror_plus("Failed to raise privileges");
1780
_exit(EX_NOPERM);
1781
}
1782
/* Set group */
1783
errno = 0;
1784
ret = setgid(0);
1785
if(ret == -1){
1786
perror_plus("setgid");
1787
_exit(EX_NOPERM);
1788
}
1789
/* Reset supplementary groups */
1790
errno = 0;
1791
ret = setgroups(0, NULL);
1792
if(ret == -1){
1793
perror_plus("setgroups");
1794
_exit(EX_NOPERM);
1795
}
1796
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1797
if(ret == -1){
1798
perror_plus("setenv");
1799
_exit(EX_OSERR);
1800
}
1801
ret = setenv("DEVICE", interface, 1);
1802
if(ret == -1){
1803
perror_plus("setenv");
1804
_exit(EX_OSERR);
1805
}
1806
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1807
if(ret == -1){
1808
perror_plus("setenv");
1809
_exit(EX_OSERR);
1810
}
1811
ret = setenv("MODE", mode, 1);
1812
if(ret == -1){
1813
perror_plus("setenv");
1814
_exit(EX_OSERR);
1815
}
1816
char *delaystring;
1817
ret = asprintf(&delaystring, "%f", (double)delay);
1818
if(ret == -1){
1530
} else {
1531
struct dirent *direntry;
1532
int ret;
1533
int devnull = open("/dev/null", O_RDONLY);
1534
for(int i = 0; i < numhooks; i++){
1535
direntry = direntries[i];
1536
char *fullname = NULL;
1537
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1538
if(ret < 0){
1819
1539
perror_plus("asprintf");
1820
_exit(EX_OSERR);
1821
}
1822
ret = setenv("DELAY", delaystring, 1);
1823
if(ret == -1){
1540
continue;
1541
}
1542
if(debug){
1543
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1544
direntry->d_name);
1545
}
1546
pid_t hook_pid = fork();
1547
if(hook_pid == 0){
1548
/* Child */
1549
/* Raise privileges */
1550
if(raise_privileges_permanently() != 0){
1551
perror_plus("Failed to raise privileges");
1552
_exit(EX_NOPERM);
1553
}
1554
/* Set group */
1555
errno = 0;
1556
ret = setgid(0);
1557
if(ret == -1){
1558
perror_plus("setgid");
1559
_exit(EX_NOPERM);
1560
}
1561
/* Reset supplementary groups */
1562
errno = 0;
1563
ret = setgroups(0, NULL);
1564
if(ret == -1){
1565
perror_plus("setgroups");
1566
_exit(EX_NOPERM);
1567
}
1568
ret = dup2(devnull, STDIN_FILENO);
1569
if(ret == -1){
1570
perror_plus("dup2(devnull, STDIN_FILENO)");
1571
_exit(EX_OSERR);
1572
}
1573
ret = close(devnull);
1574
if(ret == -1){
1575
perror_plus("close");
1576
_exit(EX_OSERR);
1577
}
1578
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1579
if(ret == -1){
1580
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1581
_exit(EX_OSERR);
1582
}
1583
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1584
if(ret == -1){
1585
perror_plus("setenv");
1586
_exit(EX_OSERR);
1587
}
1588
ret = setenv("DEVICE", interface, 1);
1589
if(ret == -1){
1590
perror_plus("setenv");
1591
_exit(EX_OSERR);
1592
}
1593
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1594
if(ret == -1){
1595
perror_plus("setenv");
1596
_exit(EX_OSERR);
1597
}
1598
ret = setenv("MODE", mode, 1);
1599
if(ret == -1){
1600
perror_plus("setenv");
1601
_exit(EX_OSERR);
1602
}
1603
char *delaystring;
1604
ret = asprintf(&delaystring, "%f", (double)delay);
1605
if(ret == -1){
1606
perror_plus("asprintf");
1607
_exit(EX_OSERR);
1608
}
1609
ret = setenv("DELAY", delaystring, 1);
1610
if(ret == -1){
1611
free(delaystring);
1612
perror_plus("setenv");
1613
_exit(EX_OSERR);
1614
}
1824
1615
free(delaystring);
1825
perror_plus("setenv");
1826
_exit(EX_OSERR);
1827
}
1828
free(delaystring);
1829
if(connect_to != NULL){
1830
ret = setenv("CONNECT", connect_to, 1);
1831
if(ret == -1){
1832
perror_plus("setenv");
1833
_exit(EX_OSERR);
1834
}
1835
}
1836
int hook_fd = (int)TEMP_FAILURE_RETRY(openat(hookdir_fd,
1837
direntry->d_name,
1838
O_RDONLY));
1839
if(hook_fd == -1){
1840
perror_plus("openat");
1841
_exit(EXIT_FAILURE);
1842
}
1843
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1844
perror_plus("close");
1845
_exit(EXIT_FAILURE);
1846
}
1847
ret = dup2(devnull, STDIN_FILENO);
1848
if(ret == -1){
1849
perror_plus("dup2(devnull, STDIN_FILENO)");
1850
_exit(EX_OSERR);
1851
}
1852
ret = (int)TEMP_FAILURE_RETRY(close(devnull));
1853
if(ret == -1){
1854
perror_plus("close");
1855
_exit(EX_OSERR);
1856
}
1857
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1858
if(ret == -1){
1859
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1860
_exit(EX_OSERR);
1861
}
1862
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1863
environ) == -1){
1864
perror_plus("fexecve");
1865
_exit(EXIT_FAILURE);
1866
}
1867
} else {
1868
if(hook_pid == -1){
1869
perror_plus("fork");
1870
free(direntry);
1871
continue;
1872
}
1873
int status;
1874
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1875
perror_plus("waitpid");
1876
free(direntry);
1877
continue;
1878
}
1879
if(WIFEXITED(status)){
1880
if(WEXITSTATUS(status) != 0){
1881
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1882
" with status %d\n", direntry->d_name,
1883
WEXITSTATUS(status));
1884
free(direntry);
1885
continue;
1886
}
1887
} else if(WIFSIGNALED(status)){
1888
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1889
" signal %d\n", direntry->d_name,
1890
WTERMSIG(status));
1891
free(direntry);
1892
continue;
1616
if(connect_to != NULL){
1617
ret = setenv("CONNECT", connect_to, 1);
1618
if(ret == -1){
1619
perror_plus("setenv");
1620
_exit(EX_OSERR);
1621
}
1622
}
1623
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1624
perror_plus("execl");
1625
_exit(EXIT_FAILURE);
1626
}
1893
1627
} else {
1894
fprintf_plus(stderr, "Warning: network hook \"%s\""
1895
" crashed\n", direntry->d_name);
1896
free(direntry);
1897
continue;
1898
}
1899
}
1900
if(debug){
1901
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1902
direntry->d_name);
1903
}
1904
free(direntry);
1905
}
1906
free(direntries);
1907
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1908
perror_plus("close");
1909
} else {
1910
hookdir_fd = -1;
1911
}
1912
close(devnull);
1628
int status;
1629
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1630
perror_plus("waitpid");
1631
free(fullname);
1632
continue;
1633
}
1634
if(WIFEXITED(status)){
1635
if(WEXITSTATUS(status) != 0){
1636
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1637
" with status %d\n", direntry->d_name,
1638
WEXITSTATUS(status));
1639
free(fullname);
1640
continue;
1641
}
1642
} else if(WIFSIGNALED(status)){
1643
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1644
" signal %d\n", direntry->d_name,
1645
WTERMSIG(status));
1646
free(fullname);
1647
continue;
1648
} else {
1649
fprintf_plus(stderr, "Warning: network hook \"%s\""
1650
" crashed\n", direntry->d_name);
1651
free(fullname);
1652
continue;
1653
}
1654
}
1655
free(fullname);
1656
if(debug){
1657
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1658
direntry->d_name);
1659
}
1660
}
1661
close(devnull);
1662
}
1913
1663
}
1914
1664
1915
1665
__attribute__((nonnull, warn_unused_result))
1966
1716
/* Raise privileges */
1967
1717
ret_errno = raise_privileges();
1968
1718
if(ret_errno != 0){
1969
errno = ret_errno;
1970
1719
perror_plus("Failed to raise privileges");
1971
1720
}
1972
1721
2076
1825
/* Raise privileges */
2077
1826
ret_errno = raise_privileges();
2078
1827
if(ret_errno != 0){
2079
errno = ret_errno;
2080
1828
perror_plus("Failed to raise privileges");
2081
1829
}
2082
1830
2312
2060
goto end;
2313
2061
}
2314
2062
}
2315
2063
2316
2064
{
2317
2065
/* Work around Debian bug #633582:
2318
2066
<http://bugs.debian.org/633582> */
2345
2093
TEMP_FAILURE_RETRY(close(seckey_fd));
2346
2094
}
2347
2095
}
2348
2096
2349
2097
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2350
2098
int pubkey_fd = open(pubkey, O_RDONLY);
2351
2099
if(pubkey_fd == -1){
2366
2114
TEMP_FAILURE_RETRY(close(pubkey_fd));
2367
2115
}
2368
2116
}
2369
2117
2370
2118
/* Lower privileges */
2371
2119
ret_errno = lower_privileges();
2372
2120
if(ret_errno != 0){
2489
2237
2490
2238
/* If no interfaces were specified, make a list */
2491
2239
if(mc.interfaces == NULL){
2492
struct dirent **direntries = NULL;
2240
struct dirent **direntries;
2493
2241
/* Look for any good interfaces */
2494
2242
ret = scandir(sys_class_net, &direntries, good_interface,
2495
2243
alphasort);
2501
2249
if(ret_errno != 0){
2502
2250
errno = ret_errno;
2503
2251
perror_plus("argz_add");
2504
free(direntries[i]);
2505
2252
continue;
2506
2253
}
2507
2254
if(debug){
2508
2255
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2509
2256
direntries[i]->d_name);
2510
2257
}
2511
free(direntries[i]);
2512
2258
}
2513
2259
free(direntries);
2514
2260
} else {
2515
if(ret == 0){
2516
free(direntries);
2517
}
2261
free(direntries);
2518
2262
fprintf_plus(stderr, "Could not find a network interface\n");
2519
2263
exitcode = EXIT_FAILURE;
2520
2264
goto end;
2742
2486
if(debug){
2743
2487
fprintf_plus(stderr, "Starting Avahi loop search\n");
2744
2488
}
2745
2489
2746
2490
ret = avahi_loop_with_timeout(simple_poll,
2747
2491
(int)(retry_interval * 1000), &mc);
2748
2492
if(debug){
2784
2528
mc.current_server->prev->next = NULL;
2785
2529
while(mc.current_server != NULL){
2786
2530
server *next = mc.current_server->next;
2787
#ifdef __GNUC__
2788
#pragma GCC diagnostic push
2789
#pragma GCC diagnostic ignored "-Wcast-qual"
2790
#endif
2791
free((char *)(mc.current_server->ip));
2792
#ifdef __GNUC__
2793
#pragma GCC diagnostic pop
2794
#endif
2795
2531
free(mc.current_server);
2796
2532
mc.current_server = next;
2797
2533
}
2801
2537
{
2802
2538
ret_errno = raise_privileges();
2803
2539
if(ret_errno != 0){
2804
errno = ret_errno;
2805
2540
perror_plus("Failed to raise privileges");
2806
2541
} else {
2807
2542
2830
2565
2831
2566
ret_errno = lower_privileges_permanently();
2832
2567
if(ret_errno != 0){
2833
errno = ret_errno;
2834
2568
perror_plus("Failed to lower privileges permanently");
2835
2569
}
2836
2570
}
2841
2575
/* Removes the GPGME temp directory and all files inside */
2842
2576
if(tempdir != NULL){
2843
2577
struct dirent **direntries = NULL;
2844
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY
2845
| O_NOFOLLOW
2846
| O_DIRECTORY
2847
| O_PATH));
2848
if(tempdir_fd == -1){
2849
perror_plus("open");
2850
} else {
2851
#ifdef __GLIBC__
2852
#if __GLIBC_PREREQ(2, 15)
2853
int numentries = scandirat(tempdir_fd, ".", &direntries,
2854
notdotentries, alphasort);
2855
#else /* not __GLIBC_PREREQ(2, 15) */
2856
int numentries = scandir(tempdir, &direntries, notdotentries,
2857
alphasort);
2858
#endif /* not __GLIBC_PREREQ(2, 15) */
2859
#else /* not __GLIBC__ */
2860
int numentries = scandir(tempdir, &direntries, notdotentries,
2861
alphasort);
2862
#endif /* not __GLIBC__ */
2863
if(numentries >= 0){
2864
for(int i = 0; i < numentries; i++){
2865
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2866
if(ret == -1){
2867
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2868
" \"%s\", 0): %s\n", tempdir,
2869
direntries[i]->d_name, strerror(errno));
2870
}
2871
free(direntries[i]);
2872
}
2873
2874
/* need to clean even if 0 because man page doesn't specify */
2875
free(direntries);
2876
if(numentries == -1){
2877
perror_plus("scandir");
2878
}
2879
ret = rmdir(tempdir);
2880
if(ret == -1 and errno != ENOENT){
2881
perror_plus("rmdir");
2882
}
2578
struct dirent *direntry = NULL;
2579
int numentries = scandir(tempdir, &direntries, notdotentries,
2580
alphasort);
2581
if(numentries > 0){
2582
for(int i = 0; i < numentries; i++){
2583
direntry = direntries[i];
2584
char *fullname = NULL;
2585
ret = asprintf(&fullname, "%s/%s", tempdir,
2586
direntry->d_name);
2587
if(ret < 0){
2588
perror_plus("asprintf");
2589
continue;
2590
}
2591
ret = remove(fullname);
2592
if(ret == -1){
2593
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2594
strerror(errno));
2595
}
2596
free(fullname);
2883
2597
}
2884
TEMP_FAILURE_RETRY(close(tempdir_fd));
2598
}
2599
2600
/* need to clean even if 0 because man page doesn't specify */
2601
free(direntries);
2602
if(numentries == -1){
2603
perror_plus("scandir");
2604
}
2605
ret = rmdir(tempdir);
2606
if(ret == -1 and errno != ENOENT){
2607
perror_plus("rmdir");
2885
2608
}
2886
2609
}
2887
2610
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0