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- Committer: Teddy Hogeborn
- Date: 2011-11-28 22:58:16 UTC
- mto: (505.2.13 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111128225816-x1mmweblwt19qwij
* network-hooks.d/bridge: Bug fix - use the found brctl.
added
removed
plugins.d/mandos-client.c
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
1301
1302
}
1302
1303
return 0;
1303
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1304
1309
return 1;
1305
1310
}
1306
1311
1402
1407
pid_t hook_pid = fork();
1403
1408
if(hook_pid == 0){
1404
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1405
1434
dup2(devnull, STDIN_FILENO);
1406
1435
close(devnull);
1407
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1408
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1409
1438
if(ret == -1){
1410
1439
perror_plus("setenv");
1411
return false;
1440
_exit(EX_OSERR);
1412
1441
}
1413
1442
ret = setenv("DEVICE", interface, 1);
1414
1443
if(ret == -1){
1415
1444
perror_plus("setenv");
1416
return false;
1445
_exit(EX_OSERR);
1417
1446
}
1418
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1419
1448
if(ret == -1){
1420
1449
perror_plus("setenv");
1421
return false;
1450
_exit(EX_OSERR);
1422
1451
}
1423
1452
ret = setenv("MODE", mode, 1);
1424
1453
if(ret == -1){
1425
1454
perror_plus("setenv");
1426
return false;
1455
_exit(EX_OSERR);
1427
1456
}
1428
1457
char *delaystring;
1429
1458
ret = asprintf(&delaystring, "%f", delay);
1430
1459
if(ret == -1){
1431
1460
perror_plus("asprintf");
1432
return false;
1461
_exit(EX_OSERR);
1433
1462
}
1434
1463
ret = setenv("DELAY", delaystring, 1);
1435
1464
if(ret == -1){
1436
1465
free(delaystring);
1437
1466
perror_plus("setenv");
1438
return false;
1467
_exit(EX_OSERR);
1439
1468
}
1440
1469
free(delaystring);
1441
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1469
1498
}
1470
1499
}
1471
1500
free(fullname);
1472
if(quit_now){
1473
break;
1501
if(debug){
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1503
direntry->d_name);
1474
1504
}
1475
1505
}
1476
1506
close(devnull);
1673
1703
}
1674
1704
}
1675
1705
1676
if(getuid() == 0){
1706
{
1677
1707
/* Work around Debian bug #633582:
1678
1708
<http://bugs.debian.org/633582> */
1679
struct stat st;
1680
1709
1681
1710
/* Re-raise priviliges */
1682
1711
errno = 0;
1683
1712
ret = seteuid(0);
1684
1713
if(ret == -1){
1685
1714
perror_plus("seteuid");
1686
}
1687
1688
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1689
int seckey_fd = open(seckey, O_RDONLY);
1690
if(seckey_fd == -1){
1691
perror_plus("open");
1692
} else {
1693
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1694
if(ret == -1){
1695
perror_plus("fstat");
1696
} else {
1697
if(S_ISREG(st.st_mode)
1698
and st.st_uid == 0 and st.st_gid == 0){
1699
ret = fchown(seckey_fd, uid, gid);
1700
if(ret == -1){
1701
perror_plus("fchown");
1702
}
1703
}
1704
}
1705
TEMP_FAILURE_RETRY(close(seckey_fd));
1706
}
1707
}
1708
1709
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1710
int pubkey_fd = open(pubkey, O_RDONLY);
1711
if(pubkey_fd == -1){
1712
perror_plus("open");
1713
} else {
1714
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1715
if(ret == -1){
1716
perror_plus("fstat");
1717
} else {
1718
if(S_ISREG(st.st_mode)
1719
and st.st_uid == 0 and st.st_gid == 0){
1720
ret = fchown(pubkey_fd, uid, gid);
1721
if(ret == -1){
1722
perror_plus("fchown");
1723
}
1724
}
1725
}
1726
TEMP_FAILURE_RETRY(close(pubkey_fd));
1727
}
1728
}
1729
1730
/* Lower privileges */
1731
errno = 0;
1732
ret = seteuid(uid);
1733
if(ret == -1){
1734
perror_plus("seteuid");
1735
}
1736
}
1737
1738
/* Run network hooks */
1739
{
1740
if(getuid() == 0){
1741
/* Re-raise priviliges */
1742
errno = 0;
1743
ret = seteuid(0);
1744
if(ret == -1){
1745
perror_plus("seteuid");
1746
}
1747
}
1748
if(not run_network_hooks("start", interface, delay)){
1749
goto end;
1750
}
1751
if(getuid() == 0){
1715
} else {
1716
struct stat st;
1717
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1722
} else {
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1724
if(ret == -1){
1725
perror_plus("fstat");
1726
} else {
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1730
if(ret == -1){
1731
perror_plus("fchown");
1732
}
1733
}
1734
}
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1736
}
1737
}
1738
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1743
} else {
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1745
if(ret == -1){
1746
perror_plus("fstat");
1747
} else {
1748
if(S_ISREG(st.st_mode)
1749
and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1752
1760
/* Lower privileges */
1753
1761
errno = 0;
1754
1762
ret = seteuid(uid);
1758
1766
}
1759
1767
}
1760
1768
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
1772
}
1773
1761
1774
if(not debug){
1762
1775
avahi_set_log_function(empty_log);
1763
1776
}
2200
2213
if(gpgme_initialized){
2201
2214
gpgme_release(mc.ctx);
2202
2215
}
2203
2216
2204
2217
/* Cleans up the circular linked list of Mandos servers the client
2205
2218
has seen */
2206
2219
if(mc.current_server != NULL){
2212
2225
}
2213
2226
}
2214
2227
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2230
2215
2231
/* Re-raise priviliges */
2216
2232
{
2217
if(getuid() == 0){
2218
errno = 0;
2219
ret = seteuid(0);
2220
if(ret == -1){
2221
perror_plus("seteuid");
2222
}
2223
}
2224
/* Run network hooks */
2225
if(not run_network_hooks("stop", interface, delay)){
2226
goto end;
2233
errno = 0;
2234
ret = seteuid(0);
2235
if(ret == -1){
2236
perror_plus("seteuid");
2227
2237
}
2228
2238
2229
2239
/* Take down the network interface */
2244
2254
}
2245
2255
}
2246
2256
}
2247
if(getuid() == 0){
2248
/* Lower privileges permanently */
2249
errno = 0;
2250
ret = setuid(uid);
2251
if(ret == -1){
2252
perror_plus("setuid");
2253
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2254
2262
}
2255
2263
2256
2264
/* Removes the GPGME temp directory and all files inside */
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0